Article
Chemistry, Physical
Kuilin Lv, Detian Wan, Dezhi Zheng, Yushan Qin, Yuguang Lv
Summary: In this study, different amounts of polypyrrole modified BiVO4 photocatalyst were synthesized, and the optimal doping amount of 5% showed the highest photocatalytic activity. The mechanism of enhanced activity was discussed, with photogenerated holes transferring to the pi orbital of PPy and electrons transferring to the conduction band of BiVO4 for effective charge separation and stabilization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Hongbiao Wen, Zezhen Pan, Xingxing Wang, Kejian Li, Qihuang Wang, Jinming Luo, Hongbo Fu, Liwu Zhang, Zimeng Wang
Summary: Despite extensive research on semiconductor photocatalysis, the fundamental aquatic chemistry of these new materials and their environmental implications are poorly understood. In this study, the solubility of BiVO4 and its non-stoichiometric dissolution in different pH ranges were investigated. The solubility and stability of BiVO4 were found to be pH-dependent, with the lowest solubility and highest stability near pH 5. Illumination significantly enhanced the dissolution of BiVO4. Adsorption of dissolved bismuth by BiVO4 solids was identified as the main reason for the non-stoichiometric dissolution. These findings highlight the importance of considering the dissolution of photocatalysts and provide a method to evaluate the environmental stability and risks of other semiconductor materials.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Zhanghao Chen, Na Mi, Liuqing Huang, Wenran Wang, Chen Li, Ying Teng, Cheng Gu
Summary: The study successfully synthesized a snow-like BiVO4 with rich oxygen vacancy by adjusting the surfactant, which significantly improved the separation efficiency of photo-generated carriers, and subsequently enhanced the photodegradation of CIP. The main active species contributing to CIP degradation were identified as photogenerated holes and center dot O2-, and a proposed transformation pathway for CIP was established based on the identified products.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Applied
Lizhong Liu, Taiping Hu, Kai Dai, Jinfeng Zhang, Changhao Liang
Summary: A step-scheme BiVO4/Ag3VO4 composite was synthesized for the degradation of methylene blue through a hydrothermal and chemical deposition process. The composite exhibited excellent photocatalytic degradation properties, outperforming BiVO4 and Ag3VO4, with enhanced stability. This improvement in catalytic performance was attributed to its novel step-scheme mechanism facilitating charge separation and increased lifetime.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Inorganic & Nuclear
Kai Huang, Tingting Hu, Yang Wang
Summary: The Novel BiVO4/Zn2SnO4 photocatalyst was prepared by a two-step hydrothermal method, with the optimal mass ratio of Zn2SnO4 to BiVO4 identified as 7wt%. The composite demonstrated significantly improved photocatalytic degradation performance, with h(+) identified as the main active substance, as confirmed through active species trapping experiments and ESR spectroscopy.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Environmental Sciences
Ali Dehdar, Ghorban Asgari, Mostafa Leili, Tayyebeh Madrakian, Abdolmotaleb Seid-mohammadi
Summary: In this study, photodegradation of 4-chlorophenol using a BiVO4/WO3 heterostructure under visible LED light irradiation was investigated. Results showed that it had higher efficiency in 4-CP degradation than other systems, and identified major intermediates of degradation were phenol and chlorobenzene.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Chemistry, Physical
Chien-Yie Tsay, Ching-Yu Chung, Chin-Yi Chen, Yu-Cheng Chang, Chi-Jung Chang, Jerry J. Wu
Summary: Bismuth vanadate (BiVO4), W-doped BiVO4 (BiVO4:W), and Mo-doped BiVO4 (BiVO4:Mo) nanoparticles were synthesized using a green hydrothermal method. The effects of W and Mo doping on the microstructure and optical properties of BiVO4 nanoparticles and their photocatalytic activity for Rhodamine B (RhB) degradation were investigated. The results showed that impurity doping could modify the surface morphology, reduce particle size, and increase the concentration of photogenerated charge carriers, leading to enhanced photocatalytic activity.
Article
Chemistry, Multidisciplinary
Yiyao Zhang, Hongchen Song, Jintai Han, Yunchao Liu, Jing Sun, Tingting Shen, Xikui Wang, Zhen Wang, Weizhen Zhang, Xuerui Yao
Summary: A Bi2WO6/BiVO4 composite photocatalytic material was synthesized and effectively degraded oxytetracycline (OTC) and tetracycline (TC) under visible light. The compositions, structures, chemical states, and optoelectronic properties of Bi2WO6, BiVO4, and Bi2WO6/BiVO4 composites were characterized. The existence of the heterojunction interface facilitates the separation of photogenerated carriers. The degradation efficiency of OTC and TC was significantly improved by the Bi2WO6/BiVO4 composite material.
Article
Chemistry, Physical
Siavash Bakhtiarnia, Saeed Sheibani, Abbas Nadi, Eric Aubry, Hui Sun, Pascal Briois, Mohammad Arab Pour Yazdi
Summary: Cu-doped BiVO4 nanoporous thin films were synthesized using reactive magnetron sputtering, and the study found that the Cu content had a significant impact on the structure and photocatalytic activity of the films. The film with 2 at.% Cu exhibited the best photocatalytic performance.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
Tasmia Nawaz, Muhammad Bilal Tahir, M. Sagir, Khurram Shahzad, Arshid Mahmood Ali, Hussein Alrobei
Summary: The Z-scheme based photocatalyst BiVO4/Ag/NiFe2O4 was prepared using the hydrothermal method, demonstrating excellent photocatalytic performance under visible light irradiation and effective removal of azo dye and phenol.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Tayebeh Sharifi, Dora Crmaric, Marin Kovacic, Marin Popovic, Marijana Kraljic Rokovic, Hrvoje Kusic, Gabriela Ambrozic, Damir Kralj, Jasminka Kontrec, Bostjan Zener, Urska Lavrencic Stangar, Dionysios D. Dionysiou, Ana Loncaric Bozic, Drazan Jozic
Summary: By tailoring an isotype homojunction BiVO4 structure, the opto-electronic and photocatalytic properties were improved, resulting in a higher DCF removal rate. The formation of the isotype homojunction led to enhanced charge separation, leading to an increased efficiency in degrading DCF.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Pankaj Kumar Prajapati, Sandhya Saini, Neha Nandal, Suman L. Jain
Summary: A new method for N-formylation of amines with CO2 using a CuO/BiVO4 catalyst under visible light has been developed, achieving a high conversion rate of 85% and demonstrating good cycling stability.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Spectroscopy
Muhammad Imran, Zohaib Saeed, Muhammad Pervaiz, Kashif Mehmood, Rabia Ejaz, Umer Younas, Hafiz Amir Nadeem, Shah Hussain
Summary: The photocatalytic activity of TiO2 was improved by co-doping with Fe, Co, and S via the sol-gel method. Through a series of experiments and characterization, it was found that under specific conditions, 99.3% of Congo red could be degraded within 70 minutes of irradiation time.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Engineering, Chemical
Linh Xuan Nong, Vinh Huu Nguyen, Long Giang Bach, Thuan Van Tran, Seong Soo Hong, Bawadi Abdullah, Nguyen Khoa Hien, Trinh Duy Nguyen
Summary: Single phase scheelite-monoclinic BiVO4 materials with different morphologies were successfully synthesized via a hydrothermal method by controlling the pH of the precursor. The photocatalytic performance of the materials was evaluated, showing that the structure and bandgap energy of BiVO4 were influenced by the pH value. The study demonstrated that the morphologies of BiVO4 products played a significant role in enhancing the photocatalytic activity.
CHEMICAL ENGINEERING COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Jinming Wang, Lulu Guo, Lei Xu, Peng Zeng, Renjie Li, Tianyou Peng
Summary: This study successfully developed an artificial photosynthetic system for overall water splitting driven by sunlight, achieving efficient photosynthesis through a two-step excitation Z-scheme charge transfer mechanism.
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)