Article
Materials Science, Multidisciplinary
Muhammad Ramzan, Muhammad Abdul Moiz, Abdullah Mumtaz, Muhammad Babar Khalid, Syed Wilayat Husain
Summary: Based on first-principle calculations and experimental synthesis, Cr-doped ZnO is found to be the most suitable material with enhanced photocatalytic activity, supported by band gap reduction and red shift observed in both computational and experimental results.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Leandro L. Peres, Camila M. Cholant, Rafaela M. J. Lemos, Marco P. Rodrigues, Luana U. Kruger, Richard Pereira, Wladimir H. Flores, Andre Gundel, Douglas L. da Silva, Agnieszka Pawlicka, Cesar O. Avellaneda
Summary: The study used the peroxovanadate sol-gel method to produce ZnO-doped V2O5 thin films, demonstrating that ZnO doping improved the cyclic stability and reversibility of the films and resulted in a mixture of crystalline phases.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Leandro L. Peres, Camila M. Cholant, Rafaela M. J. Lemos, Marco P. Rodrigues, Luana U. Krueger, Richard Pereira, Wladimir H. Flores, Andre Guendel, Douglas L. da Silva, Agnieszka Pawlicka, Cesar O. Avellaneda
Summary: This study used the peroxovanadate sol-gel method to produce ZnO-doped V2O5 thin films and investigated the effect of doping on the electrochromic and structural characteristics of the films. The results showed that ZnO doping improved the cyclic stability and reversibility of the films, making them promising candidates for electrochromic device applications.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Xin Qu, Peng Xu, Hong Jiang, Lixin He, Xinguo Ren
Summary: We present an implementation of the DFT+U method within the framework of NAO, which allows for structure relaxations and calculations of systems with non-collinear spin textures. The correlated subspace is defined using the Mulliken charge projector, and important parameters are estimated using the Yukawa potential. Benchmark calculations and comparisons with experimental results demonstrate the validity of our NAO-based implementation.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
N. H. Alonizan
Summary: Pure and Al-doped ZnO nanoparticles were synthesized using hydrothermal technique. The structural and phase analysis showed that Al doping increased the crystallite size and caused compressive stress formation in the material network. Other studies investigated the impact of different Al doping ratios on powder morphology, optical bandgap, and electronic defects localized in the material band-gap.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Condensed Matter
V. N. Jafarova, G. S. Orudzhev
Summary: This study investigates the structural and electronic properties of bulk ZnO using density functional theory. By employing different methods, parameters such as band structure and density of states are calculated, showing agreement with experimental results.
SOLID STATE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Pedram Tavadze, Reese Boucher, Guillermo Avendano-Franco, Keenan X. Kocan, Sobhit Singh, Viviana Dovale-Farelo, Wilfredo Ibarra-Hernandez, Matthew B. Johnson, David S. Mebane, Aldo H. Romero
Summary: The authors conducted a study on a group of iron-based compounds to explore the effects of U and J parameters on predicting physical properties, finding that the PBE functional has the smallest standard deviation and the most transferable parameters.
NPJ COMPUTATIONAL MATERIALS
(2021)
Article
Materials Science, Ceramics
Sikder Ashikuzzaman Ayon, Moniruzzaman Jamal, Ayeman Mazdi Nahin, Md Saiful Islam, Sadiq Shahriyar Nishat, Ahmed Sharif
Summary: Employing a modified sol-gel combustion technique, BiFeO3 and Bi0.85Ba0.15Fe1-xAlxO3 nanoparticles were synthesized, and the effects of Al doping on the dielectric, optical, and magnetic properties were investigated. Experimental findings showed changes in the material properties, with BBFAO-2.5 exhibiting the best dielectric performance and resistivity among the co-doped nanoparticles.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Wubishet Kejela Tolossa, Paulos Taddesse Shibeshi
Summary: Zn1-x(Co, Fe)(x)O nanoparticles were synthesized via sol-gel combustion method, exhibiting single-phase hexagonal structure and small crystallite sizes. Upon optical activation, the nanoparticles showed broad optical band gaps and reduced charge carrier recombination. Co-doping enhanced the antibacterial activity of the nanoparticles.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Materials Science, Ceramics
Mohua Chakraborty, R. Thangavel, Dhrubojyoti Roy
Summary: Pristine- and copper-doped ZnO thin films were deposited on tin-doped indium oxide-coated glass substrates using the sol-gel method followed by spin-coating. Annealing at 450 degrees C was performed to decrease defects. The films exhibited polycrystalline structure and larger particle size with increasing Cu-doping concentration. Cu-doped ZnO thin films showed low band gap and high electrical conductivity. Additionally, films with optimized Cu-doping concentration demonstrated enhanced photoelectrochemical performance.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Optics
A. El Hamidi, E. El Mahboub, K. Meziane, A. El Hichou, A. Almaggoussi
Summary: Mg-doped ZnO thin films were studied for improved solar cell performance, with XRD showing optimal performance at 2% Mg concentration. This was attributed to electronegativity differences and grain size variations.
Article
Environmental Sciences
Lu Liu, Peng Gong, Guangcai Shao, Pengfei Liu, Junfeng Wang
Summary: The adsorption and decomposition of methanol and methoxy radical on CuO(111) surfaces were investigated using density functional theory calculations with a Hubbard U correction. The formation of oxygen vacancies significantly enhanced the adsorption of methanol and methoxy radical, and accelerated the decomposition of methanol.
AEROSOL AND AIR QUALITY RESEARCH
(2022)
Article
Chemistry, Physical
Hafiza Benish Munawar, Abid Hussain, Soumaya Gouadria, Shahzadi Noreen, Nazia Bibi, Amna Tariq, Muhammad Bilal Tahir, Jalil Ur Rehman, Saira Arshad, H. Elhosiny Ali
Summary: The structural, electronic, magnetic, and optical properties of MFe2O4 (M = Ni, Fe, Co) ferrites were studied using density functional theory. LDA+U was employed to investigate these properties under different pressures. XRD patterns revealed a decrease in lattice parameters, unit cell volumes, X-ray densities, and interatomic distances with increasing pressure. LDA+U calculations showed that the ferrites exhibited semiconductor behavior with a decrease in band gap as pressure increased. The magnetic properties, including magnetic moment and saturation magnetization, also decreased with increasing pressure. The ferrites were found to be suitable for optoelectronic, photocatalytic, and solar cell applications.
INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Hoai Linh Linh Pham, Van Hao Nguyen, Van Khien Nguyen, Nhu Hoa Thi Tran, Hong Phong Thi Le, Thi Huong Tran, Hong Nhung Nguyen, Kieu Giang Thi Lam, Van Thanh Dang
Summary: In this study, various 3D ZnO hierarchical nanostructures were synthesized using an innovative sol-gel method. The synthesized structures exhibited large specific surface area, high degree of crystallinity, and tunable band gap. The ZnO nanosheet-based flower structure showed superior photoactivity in the photodegradation experiment.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Divyarajsinh Zala, Davit Dhruv, Faizal Mirza, Neeta A. Bhammar, Hardik Gohil, Himanshu Dadhich, Alpa Zankat, K. N. Rathod, Sanjay Kansara, A. D. Joshi, P. S. Solanki, N. A. Shah
Summary: In this study, CdO-ZnO core-shell nanoparticles were successfully synthesized and characterized using various techniques including XRD, FESEM, HRTEM, UV-Visible spectroscopy, Raman spectroscopy, and impedance spectroscopy. The results showed that the synthesized nanoparticles had a uniform structure, stable morphology, and specific optical and electrical properties.
Review
Engineering, Chemical
Rasheed O. Kelani, Zainal Ahmad, Dipesh Patle
Summary: This paper provides an overview of studies on mechanistic model-based control of biodiesel production process, focusing on control strategies such as plantwide control, model predictive control, and optimal control. It is found that there is limited application of advanced control strategies in the biodiesel production process, especially within the plantwide control framework. Decentralized plantwide control using a heuristic-based method and simulations is currently being employed to improve the performance of biofuel production. The review highlights the need for a simple, effective, and easily implementable plantwide design control for achieving optimal profitability, controllability, and safety.
CHEMICAL ENGINEERING COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Rabie Amari, Elhadj Benrezgua, Bahri Deghfel, Zoukel Abdelhalim, Muhamad Kamil Yaakob, Wan Jeffrey Basirun, Ammar Boukhari, Soorathep Kheawhom, Ahmad Azmin Mohamad
Summary: Nanoparticles synthesized by the co-precipitation technique show attractive properties, but some characteristics of the Ni-doped ZnO NPs remain controversial. In this study, pure ZnO and NZO NPs were successfully prepared, and consistent results in phase analysis, morphology, and structural parameters were obtained. The increase in Ni content led to changes in the morphology of the nanoparticles, and the formation of NiO secondary phases was observed.
Article
Materials Science, Multidisciplinary
Mardiana Said, Nurulakmal Mohd Sharif, Muhammad Firdaus Mohd Nazeri, Soorathep Kheawhom, Ahmad Azmin Mohamad
Summary: In this study, a comparative analysis was conducted to evaluate the influence of isothermal aging on SAC305/Cu solder joints by conventional reflow and microwave hybrid heating (MHH). The results showed that MHH resulted in a thinner Cu6Sn5 layer, smaller grain size, and higher ultimate tensile strength (UTS) compared to conventional reflow, indicating its potential for improving the long-term reliability of solder joints.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
M. Gopalakrishnan, A. A. Mohamad, M. T. Nguyen, T. Yonezawa, J. Qin, P. Thamyongkit, A. Somwangthanaroj, S. Kheawhom
Summary: Zinc-air batteries are gaining attention for their high energy density, safety, and eco-friendliness, but the limitations of noble metal electrocatalysts make polymers a promising alternative.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Engineering, Chemical
Hafiz Gadafi Abdul Aziz, Boon Seng Ooi, Abdul Latif Ahmad, Zainal Ahmad, Mohd Azmier Ahmad, Choe Peng Leo
Summary: This study successfully improved the removal of phosphate by producing and modifying calcium carbonate nanoparticles. The incorporation of iron increased the surface area of CaCO3, resulting in significantly enhanced phosphate removal. CaCO3-Fe exhibited different adsorption behavior for phosphate compared to traditional pH-responsive materials.
CHEMICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Energy & Fuels
Ahmad Fuzamy Mohd Abd Fatah, Ahmad Zaki Rosli, Ahmad Azmin Mohamad, Andanastuti Muchtar, Muhammed S. A. Ali, Noorashrina A. Hamid
Summary: This study investigates the effect of adding nickel oxide (NiO) to lanthanum strontium cobalt ferrite (LSCF) cathode on its physical and electrochemical properties. The results show that adding 5% nickel oxide to LSCF results in the lowest impedance value and enhances the oxygen reduction process. LSCF-NiO with outstanding performance was successfully synthesized at intermediate temperatures (800-600 degrees C).
Article
Chemistry, Multidisciplinary
Huijun Song, Jingjing Li, Guan Sheng, Yinling Zhang, Ahmad Azmin Mohamad, Juan Luo, Zhangnan Zhong, Wei Shao
Summary: In this study, a novel core-shell structure electrocatalyst was designed, which significantly enhanced the electrochemically active surface area and exhibited excellent OER catalytic performance.
Review
Chemistry, Physical
Elhadj Benrezgua, Bahri Deghfel, Abdelhalim Zoukel, Wan Jeffrey Basirun, Rabie Amari, Ammar Boukhari, Muhamad Kamil Yaakob, Soorathep Kheawhom, Ahmad Azmin Mohamad
Summary: This review summarizes the applications of Cu-doped ZnO (CZO) thin films in optoelectronic and gas sensing devices, with a focus on the sol-gel synthesis method and the related chemical and physical parameters. The influence of various parameters on the structural, morphological, electronic, optical, vibrational, and magnetic properties of CZO thin films is discussed. The review also examines the effects of Cu doping on the synthesis and properties of CZO thin films. Future potential applications and research directions are also presented.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Multidisciplinary
Huijun Song, Jingjing Li, Guan Sheng, Ruilian Yin, Yanghang Fang, Shigui Zhong, Juan Luo, Zhi Wang, Ahmad Azmin Mohamad, Wei Shao
Summary: We have successfully fabricated a Ni2P@Fe2P core-shell catalyst with excellent performance in the OER reaction via chemical transformation. This catalyst exhibits low overpotential, small Tafel slope, and outstanding durability, which can be mainly attributed to the strong electronic interaction between Ni2P and Fe2P nanodomains.
Article
Engineering, Environmental
Ramin Khezri, Shiva Rezaei Motlagh, Mohammad Etesami, Ahmad Azmin Mohamad, Falko Mahlendorf, Anongnat Somwangthanaroj, Soorathep Kheawhom
Summary: This article introduces the mechanism and challenges of zinc-air batteries and electrically rechargeable zinc-air batteries, and provides potential solutions to these challenges. It also explores the latest developments in mechanically rechargeable ZAB technologies and provides future research directions to promote their commercial application.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Materials Science, Multidisciplinary
Nor Azmira Salleh, Soorathep Kheawhom, Noor Ashrina A. Hamid, Wan Rahiman, Ahmad Azmin Mohamad
Summary: With the rapid development of supercapacitors, there is a growing demand for more flexible, stable, safer, and cost-effective devices. One of the main challenges is the introduction of polymer binders in supercapacitor electrodes to enhance durability, malleability, and eco-friendliness. This review provides a comprehensive analysis of electrode preparation and the physical and electrochemical properties, highlighting the application and impact of polymer binders on the performance of supercapacitor electrodes. Polymer binders play a crucial role in improving the performance and flexibility of supercapacitor electrodes by acting as a glue between current collectors and active materials.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Electrochemistry
Shiva Rezaei Motlagh, Ramin Khezri, Mohammad Etesami, Ahmad Azmin Mohamad, Pinit Kidkhunthod, Muhamad Kamil Yaakob, Manaswee Suttipong, Mai Thanh Nguyen, Tetsu Yonezawa, Kasidit Nootong, Soorathep Kheawhom
Summary: This work presents a promising solution to the hydrogen evolution reaction problem in aqueous zinc-ion batteries, improving battery lifespan and performance by using a hybrid electrolyte. The results demonstrate that the hybrid electrolyte can suppress hydrogen evolution and enhance cycle durability.
ELECTROCHIMICA ACTA
(2023)
Article
Materials Science, Multidisciplinary
Zulfirdaus Zakaria, Siti Kartom Kamarudin, Siti Hasanah Osman, Ahmad Azmin Mohamad, Mohd Nur Ikhmal Salehmin
Summary: A good electrochemical performance of polymer electrolyte membranes (PEMs) can be achieved by balancing the requirements of ethanol permeability and proton conductivity, which is critical for high membrane selectivity. Reducing the thickness of PEMs can improve proton conductivity but also leads to high ethanol permeability. In this paper, the optimum thickness of a carrageenan/polyvinyl alcohol-graphene oxide membrane was identified, which showed the highest membrane selectivity and sustained electrochemical performance.
Review
Materials Science, Multidisciplinary
Mardiana Said, Nor Azmira Salleh, Muhammad Firdaus Mohd Nazeri, Hatem Akbulut, Soorathep Kheawhom, Ahmad Azmin Mohamad
Summary: This paper focuses on the current developments of Microwave Hybrid Heating (MHH) as a promising alternative soldering method. It presents the characterization of solder joint properties related to MHH and compares them with conventional methods. The findings provide an in-depth understanding of MHH and its potential applications in the electronic packaging sector.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
Vipada Aupama, Wathanyu Kao-ian, Jinnawat Sangsawang, Gopalakrishnan Mohan, Suttipong Wannapaiboon, Ahmad Azmin Mohamad, Prasit Pattananuwat, Chakrit Sriprachuabwong, Wei-Ren Liu, Soorathep Kheawhom
Summary: Zinc (Zn) is a promising material for use as an anode in water-based rechargeable batteries. However, the high reactivity of water leads to corrosion and dendrite formation on the Zn surface during charge-discharge cycles. To address these issues, a covalent organic framework (COF) was used to fabricate an artificial solid electrolyte interphase (ASEI) protective layer on the Zn surface.