Article
Chemistry, Physical
Pushpendra Kumar, Rahul Vaish
Summary: This article investigates the photocatalytic activity of BaBi4Ti4O15 doped with excess bismuth oxide (0-10 wt%) and the parametric study of photocatalysis. BaBi4Ti4O15 with excess bismuth oxide was synthesized via a solid-state route followed by calcination. The characterization of BaBi4Ti4O15 includes XRD, SEM, EDX, Raman spectroscopy, XPS, and direct optical bandgap measurement. The results show that BaBi4Ti4O15 with excess bismuth oxide has an orthorhombic perovskite structure and the concentration of oxygen vacancies is influenced by the amount of excess bismuth. The photocatalytic activity study reveals that 8 wt% excess bismuth has the highest activity. The parametric study indicates that initial concentration, intensity, and volume are correlated with the degradation rate. Real-life demonstration on indoor dye cleaning is also conducted. The effect of photocatalysis on BaBi4Ti4O15 is investigated by XRD and XPS.
SURFACES AND INTERFACES
(2023)
Article
Engineering, Chemical
Chiing-Chang Chen, Shu-Hsiang Chang, Janah Shaya, Fu-Yu Liu, Yu-Yun Lin, Ling-Guang Wang, Hwei-Yan Tsai, Chung-Shin Lu
Summary: By introducing graphene oxide (GO) into bismuth oxyhalides, the photocatalytic activity can be enhanced for the degradation of crystal violet. The Bi4O5Br2/ BiOI/GO composites exhibit durable photocatalytic activity and chemical stability. *OH and *O2- play a primary role in the photocatalytic degradation.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Materials Science, Multidisciplinary
Gang Liu, Chunpeng Gao, Xinmei Liu, Xiaoyi Wang, Miaomiao Liu, Yunlong Chen, Guanxiang Wang, Zhengchun Teng, Wenlong Yang
Summary: In this study, the enhanced photocatalytic activity of delta-Bi2O3 nanoparticles under visible light irradiation was demonstrated. Nanostructured delta-Bi2O3 with a size of less than 50 nm was successfully synthesized by a simple chemical precipitation method. The delta-Bi2O3 nanoparticles showed superior activity towards various pollutants under visible light, which can be attributed to their microstructure and the presence of oxygen vacancies in the defective fluorite structure. The findings of this work provide a new approach to enhance the photocatalytic performance of delta-Bi2O3 without the need for additional compounds.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Xinyu Gao, Kelei Huang, Guangmin Ren, Xiangchao Meng, Zizhen Li
Summary: In this study, an in-situ photoreduction route was used to anchor PtOx onto the surface of Cr2Bi3O11 for improved carrier transport and enhanced photocatalytic activity. The optimal PtOx modified Cr2Bi3O11 showed higher activity in organic pollutants removal and oxygen evolution.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Junhui Yi, Haoxian Zeng, Hai Lin, Minghao Li, Runkun Xie, Beifang Chen, Runsi Ding, Zhenghui Liu, Dehao Li, Ning Li
Summary: In this paper, a direct Z-scheme Ag2O/Bi2MoO6 heterostructured microspheres with good interfacial properties were successfully prepared. Various techniques were used to characterize the structure, morphology, composition, electrochemical and optical properties of the product. The composite exhibited excellent catalytic performance, with a visible degradation efficiency of 86% in 90 minutes and a photocurrent efficiency of 0.8 mu A/cm2. The enhanced activity was attributed to the formation of a good interfacial contact between Ag2O and Bi2MoO6, and hole and superoxide were identified as the main active species. This work provides a new perspective for the rational design of Bi2MoO6-based Z-scheme heterojunctions for environmental remediation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Xiangbiao Liao, Xin Lan, Nan Ni, Pengfei Yang, Yuan Yang, Xi Chen
Summary: Engineering nanostructures for semiconductor materials is an important strategy for achieving excellent photocatalytic activity. The synthesis of BiOCl nanowires through a highly efficient route showed superior visible-light photocatalytic activity compared to traditional BiOCl powder and TiO2. The unique structure with a high aspect ratio and exposed active facets contributes to the enhanced performance.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
C. Manoharan, R. Rammohan, R. Subramanian, V. Umashanker
Summary: Alpha-Bismuth oxide nanoparticles (alpha-BiNPs) were successfully synthesized using oxalic acid as a reducing agent, and characterized using various techniques. The synthesized alpha-BiNPs showed promising photocatalytic activity, making them suitable for environmental applications.
INORGANIC AND NANO-METAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Xing Gao, Ying Zhang, Bin Yin, Yufei Liu, Tat Thang Nguyen, Shuo Zhang, Yaru Wei, Chunhua Du, Li Li, Minghui Guo
Summary: This study synthesized a new bismuth molybdate photocatalyst, P-Bi2MoO6, using wood waste from sports equipment, which exhibited higher photodegradation efficiency compared to conventional bismuth molybdate. The improved efficiency can be attributed to the decrease in crystallite size, enrichment in surface-active oxygen species, enhanced light absorption, efficient carrier separation, and strengthened charge transfer.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2021)
Article
Materials Science, Ceramics
Dehui Leng, Tingting Wang, Chengchao Du, Xiaoxiao Pei, Yixin Wan, Junli Wang
Summary: Bismuth trioxide (Bi2O3) is known for its polymorphism and versatile applications. In this study, highly discrete beta-Bi2O3 nanoparticles (NPs) were successfully synthesized by thermal oxidation of nearly monodisperse Bi nanoparticles. The size and shape of beta-Bi2O3 NPs could be controlled by the size of parent Bi NPs, and the beta and alpha polymorphs could be selectively achieved by adjusting the oxidation temperature. The beta-Bi2O3 NPs exhibited remarkable thermal expansion anisotropy and good photocatalytic activity for visible-light degradation of dyes.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
H. Moreno, G. L. Domingues, M. Assis, P. P. Ortega, V. R. . Mastelaro, M. A. . Ramirez, A. . Z. Simoes
Summary: This study investigates the morphology and photocatalytic properties of CeO2 nanocrystals synthesized using microwave-assisted solvothermal method with acetone and ethanol as solvents. The results show that CeO2 synthesized in acetone has more emission peaks in the blue region, possibly due to higher Ce3+ concentration, while CeO2 synthesized in ethanol exhibits a strong orange-red emission, suggesting the presence of oxygen vacancies. CeO2 synthesized in acetone demonstrates superior photocatalytic response compared to that synthesized in ethanol, possibly due to increased disorder in the CeO2 structure, leading to enhanced light absorption.
INORGANIC CHEMISTRY
(2023)
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
Multidisciplinary Sciences
Khalid Umar, Manar Fawzi Bani Mfarrej, Qazi Inamur Rahman, Mohammad Zuhaib, Amir Khan, Qamar Zia, Saeed Banawas, Hera Nadeem, Mohd Farhan Khan, Faheem Ahmad
Summary: The sol-gel technique was used to fabricate ZnO Nano-swirlings (ZNsw) with specific agitation conditions. The size and morphology of ZNsw were studied using various characterization techniques. The results showed that ZNsw formed large clusters with folded long thread-lengths. Additionally, ZNsw exhibited high photocatalytic activity and antifungal properties.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Environmental
Chiao-Wen Chien, Namasivayam Dhenadhayalan, King-Chuen Lin
Summary: Zirconium dioxide-incorporated bismuth sulfide (Bi2S3/ZrO2) and bismuth tungstate (Bi2WO6/ZrO2) heteronanostructures were synthesized and used as photocatalysts for the visible light-driven degradation of chloramphenicol. Both heteronanostructures exhibited excellent catalytic activity, and the degradation rate was greatly enhanced when peroxymonosulfate was used as an activator. The generation and separation of photoinduced charge carriers played a crucial role in the improved catalytic activity. These inorganic heteronanostructures have great potential in the field of contaminated water remediation and provide a platform for the fabrication of photocatalyst materials.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Vibhav Katoch, Nipun Sharma, Manju Sharma, Mayank Baghoria, Jiban Jyoti Panda, Manish Singh, Bhanu Prakash
Summary: Microreactors play a crucial role in the synthesis and rapid testing of nanocatalysts for addressing environmental contamination issues. The study reported efficient dye degradation and excellent stability using Bi2O3 nanoparticles synthesized in microreactors, highlighting the advantages of microreactor-based photocatalysis over conventional methods.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Yu-Chen Chou, Yu-Yun Lin, Chung-Shin Lu, Fu-Yu Liu, Jia-Hao Lin, Fu-Hsuan Chen, Chiing-Chang Chen, Wu-Tsan Wu
Summary: The systematic synthesis of bismuth oxychloride/bismuth oxybromide/graphitic carbon nitride (BiOxCly/BiOmBrn/g-C3N4) nano-composites using a controlled hydrothermal method showed promising photocatalytic activity for the degradation of crystal violet and 2-hydroxybenzoic acid under visible light irradiation. Various characterization techniques were employed to study the structure and performance of the composite material, and the scavenging effect analysis indicated the main role of reactive (OH)-O-center dot in the degradation process. The proposed photodegradation mechanism provides insights for potential applications in environmental pollution control.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
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)