Article
Materials Science, Ceramics
Nada Y. Tashkandi, Reda M. Mohamed
Summary: Aniline is an important chemical used in various industries, and photocatalysis has shown great potential for its green production. In this study, MnCo2O4/rGO nanocomposite was successfully synthesized using a simple sol-gel method, and it exhibited improved absorption in the visible light region, leading to enhanced photocatalytic effectiveness. The optimized MnCo2O4/rGO nanocomposite demonstrated the ability to completely reduce nitrobenzene to aniline under visible light illumination.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Xuemin Hu, Jie Jin, Yuqing Wang, Cheng Lin, Shipeng Wan, Kan Zhang, Luyang Wang, Jong Hyeok Park
Summary: In this study, the photocatalytic production of syngas with tunable H2/CO molar ratios was achieved using rationally designed Au/MoS2 symmetrically tipped CdS nanowires. By controlling the charge transfer kinetics during photodeposition and selectively decorating size-controlled Au nanoparticles on MoS2, the widest range of H2/CO ratios in syngas reported to date, ranging from 0.35 to 3.6, was realized. This indicates that this approach is a potentially efficient method for solar-to-syngas production using rationally designed nanostructures.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Electrical & Electronic
A. Kumaresan, A. Arun, V Kalpana, P. Vinupritha, E. Sundaravadivel
Summary: In this study, NiWO4 nanoparticles and polymer-based NiWO4 nanocomposites were synthesized and characterized. The nanocomposites showed nanoplate-like morphology and exhibited improved photocatalytic activity for the degradation of toxic dyes. Polymer materials such as polyaniline (PA) and polypyrrole acted as electron trap charge carriers and effectively inhibited fast electron recombination. The prepared NiWO4/PA nanocomposite exhibited a degradation efficiency of 94% for crystal violet and methylene blue dyes, indicating its potential application in wastewater treatment.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Jia Yang, Pengfei Jiang, Xiaorui Sun, Sheng Tian, Wei Tian, Huisheng Huang, Jianwei Shi
Summary: In this study, a three-component composite 2Au@1%-ZFO/CN was designed and demonstrated to be an efficient photocatalyst for H2 evolution in triethanolamine aqueous solution under visible-light. The composite was composed of ZnFe2O4 and C3N4 as the main components, with Au nanoparticles acting as active sites and electronic channels. The optimized sample exhibited significantly enhanced H2 evolution rates compared to the unloaded sample, with a visible-light photocatalytic performance.
APPLIED SURFACE SCIENCE
(2022)
Article
Environmental Sciences
Siva Chidambaram, Mohan Kumar Ganesan, Muthusamy Sivakumar, Saravanan Pandiaraj, Muthumareeswaran Muthuramamoorthy, Santhosh Basavarajappa, Abdulaziz Abdullah Al-Kheraif, M. L. Aruna Kumari, Andrews Nirmala Grace
Summary: The integration of semiconducting nanostructures with noble metal nanoparticles is increasingly favored for cost efficient energy and environmental applications. A facile aqueous synthesis method was reported to produce polymer-capped gold nanoparticles on free-standing 2D layered zinc oxide structures, resulting in ZnO/Au nanocomposites. The study found that the concentration of Au nanoparticles promoted the preferential growth of ZnO along the (002) wurtzite plane, with the resulting structures exhibiting improved absorptivity along the visible spectrum.
Article
Materials Science, Ceramics
Yaqing Zhao, Chucheng Lin, Longrui Zhang, Xianfeng Meng, Hua Tang
Summary: A novel Tremella-like Bi2WO6 catalyst was successfully obtained by a facile hydrothermal technique, which showed remarkable visible-light catalytic performance and excellent stability, making it highly potential in environmental protection for dye degradation and CO2 reduction.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Applied
Eri Fudo, Atsuhiro Tanaka, Hiroshi Kominami
Summary: In this study, chromium hydroxide (Cr(OH)3) was introduced to gold-titanium(IV) oxide with platinum nanoparticles (Au/TiO2-Pt) photocatalysts. The Cr(OH)3/[Au/TiO2-Pt] composite photocatalyst was characterized and its functions were evaluated through photocatalytic reactions. The reduction sites of Cr(OH)3/[Au/TiO2-Pt] and the mechanism of water splitting were discussed based on experimental results.
Article
Chemistry, Physical
Supanan Anuchai, Saranya Juntrapirom, Kasornkamol Jarusupakornkul, Doldet Tantraviwat, Burapat Inceesungvorn
Summary: This study reveals for the first time the feasibility of using oxygen vacancy-rich BiOBr flower-like microsphere as a photocatalyst and hydrazine monohydrate as a green hydrogen source in the transfer hydrogenation of nitrobenzene. The existence of oxygen vacancies is confirmed through various characterization techniques. The presence of oxygen vacancies in BiOBr greatly enhances its photocatalytic activity for nitrobenzene reduction, attributed to the synergistic effects of oxygen defects and hierarchical flower-like structure.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Materials Science, Multidisciplinary
O. Mertah, K. El Hajjaji, S. El Amrani, K. Tanji, I. Goncharova, A. Kherbeche
Summary: The heterostructures of Cu/TiO2@Ag3PO4, formed by placing Cu/TiO2 nanoparticles on Ag3PO4, can significantly enhance the photocatalytic activity for nitrate reduction under simulated visible light irradiation and exhibit good antibacterial activities against E. coli and S. aureus.
Article
Engineering, Electrical & Electronic
M. Faisal, Jahir Ahmed, Jari S. Algethami, Ahmed Mohamed El-Toni, Joselito P. Labis, Aslam Khan, Farid A. Harraz
Summary: A novel visible light ternary photocatalytic structure based on mesoporous ZnO combined with chitosan (CSN) and gold nanoparticles (AuNPs) was synthesized and proven to be highly efficient in removing insecticide and dye under visible light illumination. The as-fabricated Au@CSN/ZnO nanocomposite showed 211% higher efficiency than bare mesoporous ZnO in removing insecticide and rapid destruction of dye. In addition, the photocatalyst exhibited good stability and recyclability, making it suitable for practical application in environmental remediation.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Chemistry, Physical
Irshad Ahmad, Shazia Shukrullah, Muhammad Yasin Naz, Haq Nawaz Bhatti, N. R. Khalid, Sami Ullah
Summary: The integration of S-scheme heterojunction catalyst with surface plasmon resonance effect is currently the main focus of research in the field of visible light driven photocatalytic hydrogen (H2) evolution. In this study, a sol-gel route is used to design a heterojunction of ZnO-CuO-Au. The effect of process parameters on the hydrogen evolution is investigated.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Nesrine Ben Saber, Amine Mezni, Arwa Alrooqi, Tariq Altalhi
Summary: In this study, a ternary nanocomposite of gold-titania/rGO was prepared using a modified solvothermal process, showing high efficiency in the photocatalytic decomposition of organic pollutants and dyes. The rGO layers act as excellent electron transporters, facilitating the effective separation of electron-hole pairs, while the broad absorption spectrum of the ternary nanocomposite enhances photochemical reactions.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Multidisciplinary
Michael G. Pfeffer, Carolin Mueller, Evelyn T. E. Kastl, Alexander K. Mengele, Benedikt Bagemihl, Sven S. Fauth, Johannes Habermehl, Lydia Petermann, Maria Waechtler, Martin Schulz, Daniel Chartrand, Francois Laverdiere, Phillip Seeber, Stephan Kupfer, Stefanie Graefe, Garry S. Hanan, Johannes G. Vos, Benjamin Dietzek-Ivansic, Sven Rau
Summary: The molecular apparatus of biological photosynthesis can repair itself, while artificial photosynthetic devices can break down when their components are compromised. This study demonstrates the active repair of an artificial photosynthetic molecular device, leading to the restoration of catalytic activity. Hydrogenation of the bridging ligand was identified as the deactivation mechanism, which was repaired through the light-driven generation of singlet oxygen.
Article
Chemistry, Physical
M. Faisal, Jahir Ahmed, Jari S. Algethami, Ali S. Alkorbi, Saeed A. Alsareii, Farid A. Harraz
Summary: Surface modification and bandgap engineering of ZnTiO3 is important for improving its photocatalytic performance. In this study, a ternary photocatalyst composed of ZnTiO3 nanostructures, polypyr-role doped carbon back (PPy-C), and gold nanoparticles (Au NPs) was developed. The synthesized Au@PPy-C/ZnTiO3 photocatalyst showed enhanced degradation efficiency under visible light illumination compared to bare ZnTiO3, attributed to its well-ordered mesoporous structure, high surface area, and effective decline in recombination rate of charge carriers.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Environmental Sciences
M. Faisal, Md A. Rashed, Jahir Ahmed, Mabkhoot Alsaiari, Mohammed Jalalah, S. A. Alsareii, Farid A. Harraz
Summary: Modification and bandgap engineering are crucial for enhancing the photocatalytic activity of novel photocatalysts. This study focused on fabricating a highly efficient visible light-responsive ternary photocatalyst, utilizing various analytical techniques for characterization. The results confirmed a successful nanocomposite framework with improved catalytic efficiency.
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)