Piri Keşif Aracı

Özet Ek Bilgiler

Kaydet

Precise design of graphitic carbon nitride (gC3N4) nanostructures is of grand importance in different catalytic applications. This article emphasizes additional data on the fabrication of metal-free gC3N4 nanofibres (gC3N4NFs) and its associated structural and composition analysis compared with Au/Pd co-doped gC3N4 nanofibres (Au/Pd/gC3N4NFs). The data is including the typical fabrication process of metal-free gC3N4 nanofibers and its SEM, TEM, and element mapping analysis beside Raman, and FTIR spectra relative to Au/Pd/gC3N4NFs. We also investigated the catalytic CO oxidation durability testes on Au/Pd/gC3N4NFs compared to Pd/gC3N4NFs and Au/gC3N4NFs. The presented data are associated with the research article entitled “Rational synthesis of one-dimensional carbon nitride-based nanofibers atomically doped with Au/Pd for efficient carbon monoxide oxidation.” [1]. Keywords: CO oxidation, gC3N4, Greenhouse gases, One-dimensional, gC3N4 nanofibers

ISSN: 2352-3409
Cilt: 27
Sayfa:

Sınıflandırma :

Kimya %91

Kataliz %98

2

Fabrication of ZnO-Fe-MXene Based Nanocomposites for Efficient CO2 Reduction

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

Catalysts

Yazar(lar) :

Karthik Kannan , Mostafa H. Sliem , Aboubakr M. Abdullah , Kishor Kumar Sadasivuni , Bijandra Kumar

Yıl :

2020

Mostafa H. Sliem

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

A ZnO-Fe-MXene nanocomposite was fabricated and examined with diverse spectroscopic techniques. The hexagonal structure of ZnO, MXene, and ZnO-Fe-MXene nanocomposites were validated through XRD. FTIR showed the characteristic vibrational frequencies of ZnO and MXene. The micrographs of the SEM showed nanoparticles with a flower-like structure. The electrocatalytic reduction efficiency of ZnO-Fe-MXene nanocomposite was analyzed through cyclic voltammetry and electrochemical impedance spectroscopy methods. The ZnO-Fe-MXene electrode was confirmed to have a high current density of 18.75 mA/cm2 under a CO2 atmosphere. Nyquist plots also illustrated a decrease in the impedance of the ZnO-Fe-MXene layer, indicating fast charge transfer between the Zn and MXene layers. Additionally, this electrochemical study highlights new features of ZnO-Fe-MXene for CO2 reduction.

Kaynak 1:

https://doi.org/10.3390/catal10050549 arayıcılığı görüntüle.
Kaynak 2:

http://dx.doi.org/10.3390/catal10050549 arayıcılığı görüntüle.

DOI : 10.3390/catal10050549

Anahtar Kelimeler : nanocomposites, hydrothermal method, SEM with EDAX, CO2 reduction

ISSN: 2073-4344
Cilt: 10
Sayı: 549
Sayfa: 549

Sınıflandırma :

Malzeme Bilimi %71

Enerji Malzemeleri %69

Kimya %29

Elektrokimya %79

3

Calix4arene-clicked clay through thiol-yne addition for the molecular recognition and removal of Cd(II) from wastewater

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Separation and Purification Technology

Yayıncı:

Elsevier

Yazar(lar) :

Khouloud Jlassi , Kamel Eid , Mostafa H. Sliem , Aboubakr M. Abdullah , Mohamed M. Chehimi

Yıl :

2020

Mostafa H. Sliem

Özet Ek Bilgiler

Kaydet

A novel type of hybrid Clay/Calix[4]arene (denoted as B-S-Calix), was prepared through fast photo-induced radical-mediated thiol–yne addition between a thiolated clay and an alkynylated calix[4]arene. The photo-induced radical-mediated thiol-yne reaction is a smart, low-cost, efficient, and fast pathway for tailoring low cost, reactive, and functional clay-based materials for potential wastewater treatment applications. The obtained materials were analyzed using X-ray photoelectron spectrometry (XPS), Fourier transform infrared spectroscopy (FTIR), and proton nuclear magnetic resonance spectroscopy (HNMR), which all displayed the successful formation of B-S-Calix. The as-synthesized B-S-Calix was used as an adsorbent for toxic Cd(II) metal from wastewater compared to mercaptosilanized bentonite (B-S) at room temperature. The adsorption of Cd(II) on B-S-Calix followed Langmuir isotherm models and pseudo-second-order kinetic, with a maximum removal efficiency of (92.8%) and adsorption capacity of 114 mg g−1 within only 1.5 min at pH 8 and room temperature. The presented B-S-Calix may serve as good candidates for emergent wastewater applications.

DOI : 10.1016/j.seppur.2020.117383

Anahtar Kelimeler : Heavy metals removal, Calix4arene, Bentonite, Photo-induced Thiol-Yne Click chemistry, Wastewater treatment, Cd(II) removal

ISSN: 1383-5866
Cilt: 251
Sayfa: 117383

Sınıflandırma :

Kimya %69

Çevre %31

Çevre %37

Çevresel Sağlık %22

Doğal Kaynaklar %19

4

Novel Enzyme-Free Multifunctional Bentonite/Polypyrrole/Silver Nanocomposite Sensor for Hydrogen Peroxide Detection over a Wide pH Range

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

Sensors

Yazar(lar) :

Khouloud Jlassi , Mostafa H. Sliem , Kamel Eid , Igor Krupa , Mohamed M. Chehimi , Aboubakr M. Abdullah

Yıl :

2019

Mostafa H. Sliem

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

Precise designs of low-cost and efficient catalysts for the detection of hydrogen peroxide (H2O2) over wide ranges of pH are important in various environmental applications. Herein, a versatile and ecofriendly approach is presented for the rational design of ternary bentonite-silylpropyl-polypyrrole/silver nanoarchitectures (denoted as BP-PS-PPy/Ag) via the in-situ photo polymerization of pyrrole with salinized bentonite (BP-PS) in the presence of silver nitrate. The Pyrrolyl-functionalized silane (PS) is used as a coupling agent for tailoring the formation of highly exfoliated BP-PS-PPy sheet-like nanostructures ornamented with monodispersed Ag nanoparticles (NPs). Taking advantage of the combination between the unique physicochemical properties of BP-PS-PPy and the outstanding catalytic merits of Ag nanoparticles (NPs), the as-synthesized BP-PS-PPy/Ag shows a superior electrocatalytic reduction and high-detection activity towards H2O2 under different pH conditions (from 3 to 10). Intriguingly, the UV-light irradiation significantly enhances the electroreduction activity of H2O2 substantially, compared with the dark conditions, due to the high photoelectric response properties of Ag NPs. Moreover, BP-PS-PPy/Ag achived a quick current response with a detection limit at 1 μM within only 1 s. Our present approach is green, facile, scalable and renewable.

Kaynak 1:

https://doi.org/10.3390/s19204442 arayıcılığı görüntüle.
Kaynak 2:

http://dx.doi.org/10.3390/s19204442 arayıcılığı görüntüle.

DOI : 10.3390/s19204442

Anahtar Kelimeler : bentonite clay, pyrrole, silver nanoparticles, h2o2 detection

ISSN: 1424-8220
Cilt: 19
Sayı: 20
Sayfa: 4442

Sınıflandırma :

Kimya %98

Nanokimya %93

5

Design of hybrid clay/ polypyrrole decorated with silver and zinc oxide nanoparticles for anticorrosive and antibacterial applications

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Progress in Organic Coatings

Yayıncı:

Elsevier

Yazar(lar) :

Khouloud Jlassi , Mostafa H. Sliem , Fatiha M. Benslimane , Nahla O. Eltai , Aboubakr M. Abdullah

Yıl :

2020

Mostafa H. Sliem

Özet Ek Bilgiler

Kaydet

In this work, a novel and cost-effective bentonite intercalated with polypyrrole Zinc oxide-silver nanocomposite (B-PPy/ZnO) hybrid material was prepared via in situ photopolymerization of pyrrole in the presence of silanized bentonite and zinc oxide nanoparticles and using silver nitrate as an initiator. The as-prepared Bentonite-polypyrrole/ZnO hybrid material was found to be black, exfoliated with a polypyrrole-rich surface decorated with ZnO and silver nanoparticles in a metallic state. We evaluated the propensity of the prepared hybrid material as an eco-friendly, anticorrosive, and antibacterial coating for carbon steel. The corrosion resistance efficiency study of B-PPy/ZnO composite incorporated with the epoxy matrix was carried out in a 3.5 % NaCl solution. B-PPy/ZnO 4 wt% composite coating on carbon steel was observed to exhibit best corrosion protection property, with High charge transfer resistance were value (9.85 MΩ cm−2) compared to 0.213 MΩ cm-2 in the presence of pure epoxy. Cytotoxicity assay was carried out on an A549 epithelial cell line. Moreover, B-PPy/ZnO showed a reduction in Escherichia coli bacterial growth by ∼86 % with a minimum inhibitory concentration of 0.03 mg ml-1. The results obtained herein will open new routes to the preparation of efficient ecofriendly anticorrosion and antibacterial coatings.

DOI : 10.1016/j.porgcoat.2020.105918

Anahtar Kelimeler : Clay, Polypyrrole, Zinc oxide, Hybrid materials, Corrosion resistance, Antibacterial, Cytotoxicity

ISSN: 0300-9440
Cilt: 149
Sayfa: 105918

Sınıflandırma :

Malzeme Bilimi %81

Polimer Bilimleri %90

Kimya %19

Kimya ve Gıda Bilimi %57

Nanokimya %30

6

Enhancing the corrosion resistance of reinforcing steel under aggressive operational conditions using behentrimonium chloride

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

Scientific Reports

Yazar(lar) :

A. Bahgat Radwan , Mostafa H. Sliem , Noor S. Yusuf , Nasser A. Alnuaimi , Aboubakr M. Abdullah

Yıl :

2019

Mostafa H. Sliem

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

Abstract Aggressive operational conditions e.g. saline media and acidic gases, e.g., CO2 can increase the corrosion rate of reinforcing steel. Accordingly, the necessity to protect the steel under the above conditions without affecting the mechanical properties of the concrete is growing. Herein, the inhibition efficiency of a new corrosion inhibitor, behentrimonium chloride (BTC, C25H54ClN), is explored in a simulated-concrete pore solution (SCP) with 3.5 wt.% NaCl at different pH using electrochemical impedance spectroscopy (EIS) and polarization methods. Using only a 50 μmol L−1 of BTC, we are able to measure an inhibition efficiency of 91, 79, and 71% in SCP solution with 3.5% NaCl at pH of 12.5, 10 and 7, respectively without showing any effect on the mechanical properties on the cured mortars. Temkin isotherm is used to describe the physisorption of BTC inhibitor on the steel surface. Also, the adsorption and influence of the inhibitor on the metal surface are characterized using the scanning electron microscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. In conclusion, this new inhibitor shows high corrosion inhibition efficiencies under different aggressive conditions and can be used in concrete to reduce the corrosion rate of reinforcing steel without decreasing the mechanical properties of the concrete.

DOI : 10.1038/s41598-019-54669-y

ISSN: 2045-2322
Cilt: 9
Sayı: 1
Sayfa: 1 - 13

7

Rational synthesis of one-dimensional carbon nitride-based nanofibers atomically doped with Au/Pd for efficient carbon monoxide oxidation

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

International Journal of Hydrogen Energy

Yayıncı:

Elsevier

Yazar(lar) :

Kamel Eid , Mostafa H. Sliem , Amal S. Eldesoky , Halema Al-Kandari , Aboubakr M. Abdullah

Yıl :

2019

Mostafa H. Sliem

Özet Ek Bilgiler

Kaydet

Controlled synthesis of carbon nitride nanostructures doped with noble metal-based catalysts is important in various catalytic applications. Herein, we developed a scalable, facile, and template-free approach for one-pot synthesis of one-dimensional gC3N4 nanofibers co-doped with Au and Pd donated as (Au/Pd/gC3N4NFs). The developed method tailored the high mass production of uniform gC3N4 nanofibers with a great surface area of (85 m2 g−1) and coherently co-doped with Au and Pd. Intriguingly, the complete CO oxidation temperature of Au/Pd/gC3N4NFs (144 °C) is significantly lower than that of Pd/gC3N4NFs (191 °C) and Au/gC3N4NFs (205 °C). The superior activity of Au/Pd/gC3N4NFs is attributed to the combination between outstanding inherent catalytic merits of Au/Pd and the unique physicochemical properties of gC3N4 nanofibers. Our newly designed simple approach may open the way for utilization of gC3N4 nanofibers in CO oxidation reaction.

DOI : 10.1016/j.ijhydene.2019.05.105

Anahtar Kelimeler : CO conversion, CO2 production, Carbon nitride, gC3N4 nanofibers

ISSN: 0360-3199
Sayı: 33
Cilt: 44
Sayfa: 17943-17953

Sınıflandırma :

Kimya %87

Elektrokimya %74

8

An efficient green ionic liquid for the corrosion inhibition of reinforcement steel in neutral and alkaline highly saline simulated concrete pore solutions

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

Scientific Reports

Yazar(lar) :

Mostafa H. Sliem , Ahmed Bahgat Radwan , Farida S. Mohamed , Nasser A. Alnuaimi , Aboubakr M. Abdullah

Yıl :

2020

Mostafa H. Sliem

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

Abstract The effect of the green ionic liquid compound, Quaternium-32 (Q-32), on the corrosion inhibition performance of reinforcement steel, in a simulated concrete pore solution, was investigated at different temperatures and pH values, using electrochemical impedance spectroscopy (EIS). The inhibition efficiency was improved as the concentration of Q-32 and pH values were increased. However, it decreased as the temperature was raised. A Q-32 concentration of 20 µmol L–1 exhibited a 94% inhibition efficiency at 20 °C. The adsorption isotherm was evaluated using EIS measurements, and it was found to obey the Langmuir isotherm. The surface topography was examined using an atomic force microscope and scanning electron microscope. The effect of the Q-32 concentration with the highest corrosion efficiency on the mechanical properties of the mortars was also explained by flexure and compression techniques.

Kaynak 1:

https://doi.org/10.1038/s41598-020-71222-4 arayıcılığı görüntüle.
Kaynak 2:

http://dx.doi.org/10.1038/s41598-020-71222-4 arayıcılığı görüntüle.

DOI : 10.1038/s41598-020-71222-4

ISSN: 2045-2322
Cilt: 10
Sayı: 1
Sayfa: 1 - 15

Sınıflandırma :

Malzeme Bilimi %90

Polimer Bilimleri %54

9

Corrosion Inhibition of Mild Steel in Sulfuric Acid by a Newly Synthesized Schiff Base: An Electrochemical, DFT, and Monte Carlo Simulation Study

Dergi Makalesi

Kaynak :

DSpace Makaleler

Dergi:

İstanbul Üniversitesi

Yayıncı:

İstanbul Üniversitesi

Yazar(lar) :

N. M. El Basiony , Aboubakr M. Abdullah , E. G. Zaki , Mohammed Abdelgawwad IBRAHIM SHARAF , Mostafa H. Sliem

Konu :

Temel Bilimler, Fizikokimya, Elektrokimya, Analitik Kimya, ELEKTROKİMYA, Temel Bilimler (SCI), Kimya, KİMYA, ANALİTİK

Yıl :

2020

Mostafa H. Sliem

Özet Ek Bilgiler

Kaydet

Effects of using a synthesized aminothiazole (BZ) Schiff base at different concentrations with and without the addition of 1 mM of KI on the corrosion mitigation of mild steel (MS) in 0.5 M sulphuric acid (H2SO4) solutions are studied electrochemically using direct and alternating currents (DC and AC) techniques. Besides, the adsorption and thermodynamic parameters are calculated in a temperature range of 293-323 K. Furthermore, Mott-Schottky analysis is used to study the type of oxide layer on the MS surface. Quantum chemical calculations and Monte Carlo simulation techniques are used, and both confirmed the experimental results.

Kaynak 1:

http://acikerisim.istanbul.edu.tr/handle/20.500.12627/2823 arayıcılığı görüntüle.
Kaynak 2:

http://acikerisim.istanbul.edu.tr/xmlui/handle/20.500.12627/2823 arayıcılığı görüntüle.
Kaynak 3:

https://onlinelibrary.wiley.com/doi/10.1002/elan.202060461 arayıcılığı görüntüle.

Anahtar Kelimeler : Temel Bilimler, Fizikokimya, Elektrokimya, Analitik Kimya, ELEKTROKİMYA, Temel Bilimler (SCI), Kimya, KİMYA, ANALİTİK, Makale

ISSN: 1040-0397

Sınıflandırma :

Kimya %91

Endüstriyel Kimya ve Kimya Mühendisliği %94

10

Corrosion inhibition of API X120 steel in a highly aggressive medium using stearamidopropyl dimethylamine

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Journal of Molecular Liquids

Yayıncı:

Elsevier

Yazar(lar) :

A. Bahgat Radwan , Mostafa H. Sliem , Paul C. Okonkwo , Mohamed F. Shibl , Aboubakr M. Abdullah

Yıl :

2017

Mostafa H. Sliem

Özet Ek Bilgiler

Kaydet

The inhibition efficiency of the stearamidopropyl dimethylamine (SAPDA) surfactant for the corrosion of API X120 steel in a 0.5 M HCl solution at different temperatures was investigated using different electrochemical and microscopy techniques. The kinetics and thermodynamic parameters were discussed. The overall results showed that SAPDA significantly decreased the corrosion rate of API X120 steel with an inhibition efficiency of approximately 99% at an inhibitor concentration of 136 μmol L− 1. It was revealed that the adsorption of the SAPDA surfactant on the API X120 steel surface followed Langmuir's adsorption isotherm. Polarization studies indicated that SAPDA is chemi/physisorbed on the steel surface. Quantum chemical calculations, using the density functional theory, were applied to better understand the relationship between the inhibitor efficiency and its molecular structure.

DOI : 10.1016/j.molliq.2017.03.116

Anahtar Kelimeler : Corrosion, Inhibition, API X120, Impedance spectroscopy, Electrochemical polarization, Quantum calculations

ISSN: 0167-7322
Cilt: 236
Sayfa: 220-231

Sınıflandırma :

Kimya %59

Fiziksel kimya %83

Malzeme Bilimi %40

Malzeme Mühendisliği %100

11

Highly efficient eco-friendly corrosion inhibitor for mild steel in 5 M HCl at elevated temperatures: experimental & molecular dynamics study

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

Scientific Reports

Yazar(lar) :

Muhsen A. M. El-Haddad , A. Bahgat Radwan , Mostafa H. Sliem , Walid M. I. Hassan , Aboubakr M. Abdullah

Yıl :

2019

Mostafa H. Sliem

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

Abstract Laurhydrazide N′-propan-3-one was used as an eco-friendly inhibitor for the corrosion of mild steel in 5 M HCl at elevated temperatures. Various electrochemical techniques and surface characterization methods were utilized in this study. In addition, the kinetics and thermodynamic parameters were calculated and discussed. Furthermore, a geometry optimization of LHP was performed and the time-dependent density functional theory was utilized to calculate the electronic absorption spectra. Finally, frequency calculations were, also, performed on the optimized geometry.

DOI : 10.1038/s41598-019-40149-w

ISSN: 2045-2322
Cilt: 9
Sayı: 1
Sayfa: 1 - 15

12

Erosion Behavior of API X120 Steel: Effect of Particle Speed and Impact Angle

Dergi Makalesi

Kaynak :

MDPI

Dergi:

Coatings

Yayıncı:

MDPI AG

Yazar(lar) :

Paul C. Okonkwo , Mostafa H. Sliem , Mobbassar Hassan Sk , Rana Abdul Shakoor , Adel Amer Mohamed , Aboubakr M. Abdullah , Ramazan Kahraman

Yıl :

2018

Mostafa H. Sliem

Özet Ek Bilgiler

Kaydet

The dry erosion behavior of API-X120 pipeline steel was investigated, under the erosive interaction of aluminum oxide particulates, in a range of speed (43–167 m·s−1) and impact angle (30°–90°). Erosion behavior is characterized by surface profile measurement, weight loss measurement, and surface morphology analysis by SEM/EDX. Optical profilometry revealed that the eroded area increased with elevating speed of particles while the penetration depth increased with the increases in impact angle as well as particle speed. Percent weight loss and normalized erosion rate indicated that the lower impact angles and higher speeds led to higher materials loss and erosion. SEM analyses on various combinations of impact angles and particle speeds demonstrated the predominant erosion mechanism under those specific conditions; attributed to the intensity of the resolved components of the momentum vector horizontal or normal to the target metal surface under those conditions.

Kaynak 1:

http://dx.doi.org/10.3390/coatings8100343 arayıcılığı görüntüle.
Kaynak 2:

https://doi.org/10.3390/coatings8100343 arayıcılığı görüntüle.

DOI : 10.3390/coatings8100343

ISSN: 2079-6412
Sayı: 10
Cilt: 8
Sayfa: 343

13

AEO7 Surfactant as an Eco-Friendly Corrosion Inhibitor for Carbon Steel in HCl solution

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

Scientific Reports

Yazar(lar) :

Mostafa H. Sliem , Mohammed Afifi , A. Bahgat Radwan , Eman M. Fayyad , Mohamed F. Shibl , Fakiha El-Taib Heakal , Aboubakr M. Abdullah

Yıl :

2019

Mostafa H. Sliem

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

Abstract The impact of AEO7 surfactant on the corrosion inhibition of carbon steel (C-steel) in 0.5 M HCl solution at temperatures between 20 °C and 50 °C was elucidated using weight loss and different electrochemical techniques. The kinetics and thermodynamic parameters of the corrosion and inhibition processes were reported. The corrosion inhibition efficiency (IE%) improved as the concentration of AEO7 increased. In addition, a synergistic effect was observed when a concentration of 1 × 10−3 mol L−1 or higher of potassium iodide (KI) was added to 40 µmol L−1 of the AEO7 inhibitor where the corrosion IE% increased from 87.4% to 99.2%. Also, it was found that the adsorption of AEO7 surfactant on C-steel surface followed the Freundlich isotherm. Furthermore, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements indicated that AEO7 was physically adsorbed on the steel surface. The surface topography was examined using an optical profilometer, an atomic force microscope (AFM), and a scanning electron-microscope (SEM) coupled with an energy dispersion X-ray (EDX) unit. Quantum chemical calculations based on the density functional theory were performed to understand the relationship between the corrosion IE% and the molecular structure of the AEO7 molecule.

DOI : 10.1038/s41598-018-37254-7

ISSN: 2045-2322
Cilt: 9
Sayı: 1
Sayfa: 1 - 16

Sınıflandırma :

Malzeme Bilimi %99

Polimer Bilimleri %28

Malzeme Mühendisliği %20

14

Effect of Temperature on the Corrosion Behavior of API X120 Pipeline Steel in H2S Environment

Dergi Makalesi

Kaynak :

Springer Link

Dergi:

Journal of Materials Engineering and Performance

Yazar(lar) :

Paul C. Okonkwo , Mostafa H. Sliem , R. A. Shakoor , A. M. A. Mohamed , Aboubakr M. Abdullah

Konu :

Mechanical Engineering, Mechanics of Materials, General Materials Science

Yıl :

2017

Mostafa H. Sliem

Özet Ek Bilgiler

Kaydet

The corrosion behavior of newly developed API X120 C-steel that is commenced to be used for oil pipelines was studied in a H2S saturated 3.5 wt.% NaCl solution between 20 and 60 °C using potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The corrosion products formed on the surface of the alloy were characterized using x-ray diffraction and scanning electron microscopy. It has been noticed that the formation of corrosion product layer takes place at both lower and higher temperatures which is mainly comprised of iron oxides and sulfides. The electrochemical results confirmed that the corrosion rate decreases with increasing temperature up to 60 °C. This decrease in corrosion rate with increasing temperature can be attributed to the formation of a protective layer of mackinawite layer. However, cracking in the formed mackinawite layer may not be responsible for the increase in the corrosion rate. More specifically, developed pourbaix diagrams at different temperatures showed that the formed protective layer belongs to mackinawite (FeS), a group of classified polymorphous iron sulfide, which is in good agreement with the experimental results. It is also noticed that the thickness of corrosion products layer increases significantly with decrease in the corrosion rate of API X120 steel exposed to H2S environment. These findings indicate that API X120 C-steel is susceptible to sour corrosion under the above stated experimental conditions.

DOI : 10.1007/s11665-017-2834-0

Anahtar Kelimeler : API X120 steel, hydrogen sulfide, impedance spectroscopy, sour corrosion, temperature

ISSN: 1059-9495 1544-1024
Sayı: 8
Cilt: 26
Sayfa: 3775-3783

15

Electrochemical and thermodynamic study on the corrosion performance of API X120 steel in 3.5% NaCl solution

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

Scientific Reports

Yazar(lar) :

Khuram Shahzad , Mostafa H. Sliem , R. A. Shakoor , A. Bahgat Radwan , Ramazan Kahraman , Malik Adeel Umer , Umair Manzoor , Aboubakr M. Abdullah

Yıl :

2020

Mostafa H. Sliem

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

Abstract The present work studied the effect of temperature on the corrosion behavior of API X120 steel in a saline solution saturated with CO2 in absence and presence of polyethyleneimine (PEI) as an environmentally safe green inhibitor. The effect of PEI on the corrosion behavior of API X120 steel was investigated using destructive and non-destructive electrochemical techniques. The overall results revealed that PEI significantly decreases the corrosion rate of API X120 steel with inhibition efficiency of 94% at a concentration of 100 μmol L−1. The adsorption isotherm, activation energy and the thermodynamic parameters were deduced from the electrochemical results. It is revealed that the adsorption of PEI on API X120 steel surface follows Langmuir adsorption isotherm adopting a Physi-chemisorption mechanism. Finally, the samples were characterized using scanning electron microscopy (SEM) and atomic force microscopy (AFM) techniques to elucidate the effect of aggressiveness of corrosive media on the surface morphology and the corrosion performance of API X120 steel. The surface topography result indicates that the API X120 steel interface in PEI presence is smoother than CO2 with Cl− ions or Cl− ions only. This is attributed to the compact protective film limits the aggressive ions transfer towards the metallic surface and reduces the corrosion rate. Moreover, PEI inhibition mechanism is based on its CO2 capturing ability and the PEI adsorption on the steel surface beside the siderite layer which give the PEI molecules the ability to reduce the scale formation and increase the corrosion protection due to capturing the CO2 from the brine solution.

DOI : 10.1038/s41598-020-61139-3

ISSN: 2045-2322
Cilt: 10
Sayı: 1
Sayfa: 1 - 15

Sınıflandırma :

Malzeme Bilimi %100

Malzeme Mühendisliği %100

16

Enhanced mechanical and corrosion protection properties of pulse electrodeposited NiP-ZrO2 nanocomposite coatings

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Surface and Coatings Technology

Yayıncı:

Elsevier

Yazar(lar) :

Mostafa H. Sliem , Khuram Shahzad , V.N. Sivaprasad , R.A. Shakoor , Aboubakr M. Abdullah , Osama Fayyaz , Ramazan Kahraman , Malik Adeel Umer

Yıl :

2020

Mostafa H. Sliem

Özet Ek Bilgiler

Kaydet

Pulse electrodeposition is a technique of particular interest, which offers promising advantages such as ease of processing, compositional control, uniformity in structure, and grain refinement. In the present study, NiP-ZrO2 nanocomposite coatings containing various concentrations of ZrO2 nanoparticles (ZONPs) were deposited on low alloy steel (30CrMnSi) through pulse electrodeposition technique. The ZONPs in concentration of 0.0, 0.25, 0.50, 0.75, and 1.0 g/L were added in the electrolyte bath to obtain NiP-ZrO2 nanocomposite coatings. Furthermore, to elucidate the role of ZONPs in the NiP matrix, the structural, morphological, mechanical, and electrochemical properties of NiP-ZrO2 nanocomposite coatings were studied thoroughly. FESEM and EDX results reveal the successful incorporation of ZONPs into the NiP matrix. XRD and XPS analysis confirm the formation of a pure phase NiP structure without any noticeable defects. A considerable improvement in the mechanical response was observed with an increasing amount of ZONPs, reaching to highest values (hardness 6.7 GPa, modulus of elasticity 21.72 GPa) for NiP-1.0 ZrO2 coating composition. Similarly, the electrochemical results show a gradual increase in corrosion protection behavior of the NiP-ZrO2 coatings with increasing ZONP concentration, reaching an eventual value ~5.8 kΩ cm−2 at NiP-1.0 ZrO2 coating composition, which is six times greater than the pure NiP coatings. These improvements in the mechanical and electrochemical response of NiP-ZrO2 nanocomposite coatings highlight their suitability for applications such as oil and gas pipelines.

DOI : 10.1016/j.surfcoat.2020.126340

Anahtar Kelimeler : Nanocomposite (NC) coatings, Pulse electrodeposition, Microhardness, Corrosion protection, Surface topography, Structural analysis

ISSN: 0257-8972
Cilt: 403
Sayfa: 126340

Sınıflandırma :

Malzeme Bilimi %100

Yüzeyler ve Arayüzler %87

17

Rational Synthesis of Mixed Metal Oxide Clusters Supported on a Partially Etched MAX Phase for Efficient Electrocatalytic CO2 Conversion

Dergi Makalesi

Kaynak :

Springer Link

Dergi:

Topics in Catalysis

Yazar(lar) :

Mostafa H. Sliem , Karthik Kannan , Muni Raj Maurya , Khouloud Jlassi , Kishor Kumar Sadasivuni , Bijandra Kumar , Aboubakr M. Abdullah

Konu :

General Chemistry, Catalysis

Yıl :

2022

Mostafa H. Sliem

Özet Ek Bilgiler

Kaydet

The precise fabrication of an efficient catalyst for CO2 conversion into beneficial hydrocarbons is particularly interesting for industrial and environmental applications. Herein, a three-dimensional (3D) hybrid of metal oxide clusters on a partially etched MAX phase (MxOy/MAX hybrid) is presented for efficient electrochemical reduction (eCR) of CO2 into renewable carbonaceous fuels. A scalable hydrothermal method is adopted for the controlled in-situ growth of CuO and NiO nanoparticle on a partially etched MAX phase framework. The structural, elemental and morphological analysis is performed by XRD, XPS, FTIR, SEM and TEM characterization. The CO2 eCR study on MxOy/MAX hybrid was conducted under ambient conditions. The 3D MxOy/MAX hybrid exhibited significantly improved eCR performance compared to the pristine MAX phase. The 3D MxOy/MAX scaffold with an intercalated network of mixed metal oxides affords a high surface area, ion diffusion, increased redox- active sites and improved conductivity that facilitate excellent catalytic activity. Moreover, the MxOy/MAX hybrid shows high structural stability and durability.

DOI : 10.1007/s11244-021-01528-8

Anahtar Kelimeler : Metal oxide, MAX phase, Hydrothermal method, Electrochemical CO2 reduction

ISSN: 1022-5528 1572-9028

18

Designing and performance evaluation of polyelectrolyte multilayered composite smart coatings

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Progress in Organic Coatings

Yayıncı:

Elsevier

Yazar(lar) :

Adnan Khan , Mostafa H. Sliem , Ayman Arif , Mohammed A. Salih , R.A. Shakoor , M.F. Montemor , Ramazan Kahraman , Said Mansour , Aboubakr M. Abdullah , Anwarul Hasan

Yıl :

2019

Mostafa H. Sliem

Özet Ek Bilgiler

Kaydet

This work reports the synthesis of polyelectrolyte microcapsules and its effect on the anti-corrosion performance of polymeric coating applied on steel substrates. In situ polymerization technique was used for the synthesis of monolayered urea formaldehyde microcapsules loaded with linalyl acetate (MLMCs). These capsules can be broken upon mechanical stress, such as scratches or other forms of mechanical damage. To enhance corrosion protection, Phenylthiourea (PTU), a molecule sensitive to pH, was loaded between consecutive polyelectrolytes layers of polyethylenimine (PEI) and sulfonated polyether ether ketone (SPEEK) build on the surface of MLMCs using the layer by layer technique. This polyelectrolyte layered microcapsules (PMCs) carry linalyl acetate in its core and phenylthiourea entrapped between the outer layers. Both MLMCs and PMCs, in concentration of 6 wt%, were dispersed in the epoxy resin and the resulting formulation was used to coat steel plates. Experimental findings showed that epoxy coatings reinforced with PMCs demonstrate better thermal, self-healing and anti-corrosion properties. This improved performance can be attributed to the release of polymer healing and corrosion inhibiting species from the PMCs. The epoxy coatings modified with PMCs can serve as self healing coating for corrosion protection of steel parts used, for example, in the oil and gas industry.

DOI : 10.1016/j.porgcoat.2019.105319

Anahtar Kelimeler : Polyelectrolytes, Urea formaldehyde microcapsules, Coating, Corrosion inhibitor, Self-healing, Phenylthiourea

ISSN: 0300-9440
Cilt: 137
Sayfa: 105319

Sınıflandırma :

Malzeme Bilimi %99

Polimer Bilimleri %54

Metalik Malzemeler %20

19

Controlling the biocorrosion of sulfate-reducing bacteria (SRB) on carbon steel using ZnO/chitosan nanocomposite as an eco-friendly biocide

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Corrosion Science

Yayıncı:

Elsevier

Yazar(lar) :

P. Abdul Rasheed , Khadeeja A. Jabbar , Kashif Rasool , Ravi P. Pandey , Mostafa H. Sliem , Mohamed Helal , Ayman Samara , Aboubakr M. Abdullah , Khaled A. Mahmoud

Yıl :

2019

Mostafa H. Sliem

Özet Ek Bilgiler

Kaydet

In this report, interlinked chitosan-ZnO nanocomposite at 10% ZnO (CZNC-10) is successfully used as green biocide for biofilm control and reduction of biocorrosion on carbon steel material. It was found that 250 μg/mL CZNC-10 can be used efficiently for the inhibition of sulfate reducing bacteria (SRB) biofilm on carbon steel. The Rct values after 21 and 28 days of incubation in presence of CZNC-10 are almost 3.2 and 2.8 times higher than the control respectively, indicating a strong corrosion inhibition with 74% as maximum inhibition efficiency.

DOI : 10.1016/j.corsci.2018.12.028

Anahtar Kelimeler : Chitosan-ZnO, SRB, Microbial corrosion, Biofilm, Electrochemical impedance spectroscopy

ISSN: 0010-938X
Cilt: 148
Sayfa: 397-406

Sınıflandırma :

Malzeme Bilimi %98

Metalik Malzemeler %72

20

Precise fabrication of porous one-dimensional gC3N4 nanotubes doped with Pd and Cu atoms for efficient CO oxidation and CO2 reduction

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Inorganic Chemistry Communications

Yayıncı:

Elsevier

Yazar(lar) :

Kamel Eid , Mostafa H. Sliem , Khouloud Jlassi , Amal S. Eldesoky , Ghada G. Abdo , Siham Y. Al-Qaradawi , Mohammed A. Sharaf , Aboubakr M. Abdullah , Ahmed A. Elzatahry

Yıl :

2019

Mostafa H. Sliem

Özet Ek Bilgiler

Kaydet

Rational design of graphitic carbon nitride nanostructures (gC3N4) is vital for various catalytic applications. Herein, we synthesized porous gC3N4 nanotubes (gC3N4NTs) doped with Pd and Cu (Pd/Cu/gC3N4NTs) via the consecutive polymerization of melamine in an ethylene glycol solution containing the metal precursors followed by annealing. The gC3N4NTs, thus produced, possess a well-defined one-dimensional porous nanotube architecture, large surface area (240 m2 g−1), and a homogenous dispersion of Pd and Cu with no need for templates and/or multistep reactions. This merits the CO oxidation activity of Pd/Cu/gC3N4NTs by 56 °C and 96 °C higher than that of Pd/gC3N4NTs and Cu/gC3N4NTs, respectively. The CO2 reduction activity of Pd/Cu/gC3N4NTs was a 5.5-fold higher than metal-free gC3N4NTs. Also, the UV-light irradiation enhanced the CO2 performance of Pd/Cu/gC3N4NTs by three times. The presented study may pave the way for the utilization of metal-doped gC3N4NTs in various applications.

DOI : 10.1016/j.inoche.2019.107460

Anahtar Kelimeler : Porous carbon nitride nanotubes, CO oxidation, CO2 reduction, Pd/Cu doped gC3N4

ISSN: 1387-7003
Cilt: 107
Sayfa: 107460

Sınıflandırma :

Malzeme Bilimi %75

Enerji Malzemeleri %38

Nanoteknoloji %24

Kimya %25

Kataliz %97

21

Electrospun highly corrosion-resistant polystyrene–nickel oxide superhydrophobic nanocomposite coating

Dergi Makalesi

Kaynak :

Springer Link

Dergi:

Journal of Applied Electrochemistry

Yazar(lar) :

A. Bahgat Radwan , Cheirva A. Mannah , Mostafa H. Sliem , Noora Hamad S. Al-Qahtani , Paul C. Okonkwo , Elyor Berdimurodov , Adel M. Mohamed , Aboubakr M. Abdullah

Konu :

Materials Chemistry, Electrochemistry, General Chemical Engineering

Yıl :

2021

Mostafa H. Sliem

Özet Ek Bilgiler

Kaydet

A key challenge in producing superhydrophobic coatings (SHC) is to tailor the surface morphology on the micro-nanometer scale. In this work, a feasible and straightforward route was employed to manufacture polystyrene/nickel oxide (PSN) nanocomposite superhydrophobic coatings on aluminum alloys to mitigate their corrosion in a saline environment. Different techniques were employed to explore the influence of the addition of NiO nanoparticles to the as-prepared coatings. PSN-2 composite with ~ 4.3 wt% of NiO exhibited the highest water contact angle (WCA) of 155° ± 2 and contact angle hysteresis (CAH) of 5°. EIS Nyquist plots of 3 g of electrospun polystyrene coatings (a) without and with (b) 0.1, (c) 0.15, and (d) 0.2 g of NiO.

DOI : 10.1007/s10800-021-01603-8

Anahtar Kelimeler : Wettability, Superhydrophobic, Polystyrene, Nickel oxide, Nanocomposite, Corrosion

ISSN: 0021-891X 1572-8838
Sayı: 11
Cilt: 51
Sayfa: 1605-1618

22

Organ-specific toxicity evaluation of stearamidopropyl dimethylamine (SAPDMA) surfactant using zebrafish embryos

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Science of The Total Environment

Yayıncı:

Elsevier

Yazar(lar) :

Ola Al-Jamal , Hadeel Al-Jighefee , Nadin Younes , Roba Abdin , Maha A. Al-Asmakh , A. Bahgat Radwan , Mostafa H. Sliem , Amin F. Majdalawieh , Gianfranco Pintus , Hadi M. Yassine , Aboubakr M. Abdullah , Sahar I. Da'as , Gheyath K. Nasrallah

Yıl :

2020

Mostafa H. Sliem