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Abu Bakar Mohamad,Abdul Amir H. Kadhum,Ahmed A. Al-Amiery,Lim Chai Ying,Ahmed Y. Musa 대한금속·재료학회 2014 METALS AND MATERIALS International Vol.20 No.3
Synergistic effects of the addition of KI on the corrosion inhibitive performance of a coumarin derivative on analuminum alloy in 1.0 M H2SO4 at different temperatures were studied using various electrochemicalmeasurements. Density functional theory was used to calculate the quantum chemical parameters of thecoumarin derivative. The experimental results showed that the coumarin derivative is considered as a mixedtypeinhibitor. The corrosion potential values were almost unchanged upon the addition of PBBC to the acidicsolution. The inhibition efficiency increases with increasing inhibitor concentration and increases further inthe presence of 6.02 mM KI but decreases significantly at higher temperature. The adsorption of PBBC obeyedthe Langmuir isotherm, and being chemically adsorbed at lower temperatures, while physical adsorption isfavoured at higher temperature. The theoretical results indicated that the coumarin derivative was adsorbedonto the surface of Al2024 through the sulfur, oxygen and nitrogen atoms.
Inhibition of aluminum corrosion by phthalazinone and synergistic effect of halide ion in 1.0 M HCl
Ahmed Y. Musa,Abdul Amir H. Kadhum,Abu Bakar Mohamad,Mohd Sobri Takriff,Eng Pei Chee 한국물리학회 2012 Current Applied Physics Vol.12 No.1
The inhibitive effects of 1-(2H)-phthalazinone (PTO) for aluminum alloy (2024) corrosion in 1.0 M HCl solution and the synergistic effect of KI on the corrosion inhibition efficiency were assessed using electrochemical measurements. Results showed that the inhibition efficiency increased with an increase in concentration of the PTO and synergistically increased with addition of KI. Adsorption characteristic of PTO molecules in absence and presence of KI was approximated by Freundlich and Langmuir adsorption isotherm models, respectively. The synergistic effect is found to decrease with increase in the concentration of PTO and a competitive inhibition mechanism exists between KI and PTO cations.
Muneer M. Ba-Abbad,Abdul Amir H. Kadhum,Abu Bakar Mohamad,Mohd S. Takriff,Kamaruzzaman Sopian 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.1
The experimental conditions for the synthesis of ZnO nanoparticles to produce minimal size were optimized using the D-optimal design. The influence of process parameters involves molar ratio of the starting materials, pH and the calcination temperature on the particle size were evaluated using the polynomial regression. The optimum conditions revealed by the model for obtaining a minimum particle size of ZnO were predicted to have a molar ratio of 1.76, pH of 1.50 and calcination at 402.2 8C. The obtainable particle size upon applying the model is 22.9 nm in compare to experimental result of 18 2 nm was obtained.
Ahmed Y. Musa,Abu Bakar Mohamad,Abdul Amir H. Kadhum,Mohd Sobri Takriff,Waleed Ahmoda 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.1
Quantum chemical calculations were performed on ten thio compounds using semi-empirical method PM3 within program package of Material Studio 5.5. The effect of molecular structure on the corrosion inhibition efficiency was investigated using the quantum chemical calculations. The electronic properties such as highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO) energy levels, (LUMO–HOMO) energy gap, dipole moment (l) and fraction of electron transfer (DN) were calculated and discussed. A relationship between the corrosion inhibition efficiency and several quantum parameters was established with coefficient correlation (R2) of 0.8894.
Removal of Rhodamine Dye from Water Using Erbium Oxide Nanoparticles
Luaibi, Hasan M.,Al-Taweel, Saja S.,Gaaz, Tayser Sumer,Kadhum, Abdul Amir H.,Takriff, Mohd S.,Al-Amiery, Ahmed A. Materials Research Society of Korea 2019 한국재료학회지 Vol.29 No.12
Environmental pollution remains a considerable health risk source all over the world; however, hazards are usually higher in developing countries. Iraq has long been suffering from the problem of pollution and how to treat pollution. Photocatalytic degradation has turned out to be most productive process for dye degradation. In this investigation, Rhodamine B (RhB), dye has been selected for degradation under visible light illumination. To address this issue, we fabricate erbium trioxide nanoparticles (Er<sub>2</sub>O<sub>3</sub>/NPs). Erbium trioxide nanoparticles are prepared and utilized for photo-catalytic degradation. The characterization of Er<sub>2</sub>O<sub>3</sub>/NPs is described and confirmed by utilizing of XRD (X-ray diffraction) and SEM (Scanning Electron Microscopy). The average size of Er<sub>2</sub>O<sub>3</sub> nanoparticles is observed to be 16.00 nm. Er<sub>2</sub>O<sub>3</sub>/NPs is investigated for its ability of photo-catalytic degradation through certain selected parameters such as concentration and time. The methodological results show that the synthesized Er<sub>2</sub>O<sub>3</sub>/NPs is a good photo-catalytic for Rhodamine degradation.
Corrosion Inhibition of Copper-nickel Alloy: Experimental and Theoretical Studies
Khadom, Anees A.,Yaro, Aprael S.,Musa, Ahmed Y.,Mohamad, Abu Bakar,Kadhum, Abdul Amir H. Korean Chemical Society 2012 대한화학회지 Vol.56 No.4
The corrosion inhibition of copper-nickel alloy by Ethylenediamine (EDA) and Diethylenetriamine (DETA) in 1.5M HCl has been investigated by weight loss technique at different temperatures. Maximum value of inhibitor efficiency was 75% at $35^{\circ}C$ and 0.2 M inhibitor concentration EDA, while the lower value was 4% at $35^{\circ}C$ and 0.01 M inhibitor concentration DETA. Two mathematical models were used to represent the corrosion rate data, second order polynomial model and exponential model respectively. Nonlinear regression analysis showed that the first model was better than the second model with high correlation coefficient. The reactivity of studied inhibitors was analyzed through theoretical calculations based on density functional theory (DFT). The results showed that the reactive sites were located on the nitrogen (N1, N2 and N4) atoms.