Article
Engineering, Environmental
Weihong Gao, Geng Li, Qiuwen Wang, Lijun Zhang, Kang Wang, Shaoxuan Pang, Guangming Zhang, Longyi Lv, Xiaoyang Liu, Wenfang Gao, Li Sun, Yuguo Xia, Zhijun Ren, Pengfei Wang
Summary: In this study, we designed novel ultrathin porous Bi2WO6 nanosheets with rich surface oxygen vacancies. The oxygen vacancies can narrow the bandgap, enhance light absorption, and promote electron separation and transfer. Additionally, the multiplication of oxygen vacancies increases the adsorption energy of O-2, activating O-2 to produce more center dot O-2(-). The porous structure enhances the adsorption capacity of the nanosheets to tetracycline molecules, allowing for a more efficient use of the center dot O-2(-). The nanosheets exhibit a degradation efficiency approximately 52.6 times higher than bulk Bi2WO6, showing great potential for removing organic pollutants.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Xinyang Li, Wenjun Li, Shaonan Gu, Xintong Liu, Hongda Li, Chaojun Ren, Xiaohui Ma, Hualei Zhou
Summary: Yb-doped Bi2WO6 nanomaterials were synthesized successfully and showed higher photocatalytic activity compared to pristine Bi2WO6, attributed to the introduction of more oxygen vacancies and superoxide anion active groups. Introducing oxygen vacancies to enhance photocatalytic performance is an effective strategy for developing visible light photocatalysts.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Xiaolei Zhang, Yingge Zhang, Hongfen Li, Yinghui Wang, Maobi Xiang, Wenying Yu, Hongwei Huang, Hongling Ou
Summary: This study prepared Bi2WO6 with surface tungsten vacancies (WVs) and oxygen vacancies (OVs) by a facile alkali etching method and controlled the concentration of vacancies. The simultaneous introduction of WVs and OVs enhanced the separation of photogenerated carriers and decreased charge transfer resistance, significantly boosting photocatalytic pollutant degradation and antibacterial performance.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Lin Liu, Jiaqing Liu, Kailong Sun, Jun Wan, Feng Fu, Jun Fan
Summary: In this study, a novel phosphorus-doped Bi2WO6 (PBWO) monolayer with oxygen vacancies was successfully synthesized, showing superior visible-light photocatalytic performance attributed to the synergistic effect of phosphorus doping and oxygen vacancies.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Anurak Waehayee, Chuthamat Duangkamol, Maneerat Chotsawat, Tharit Lerdwiriyanupap, Thitima Pewklang, Hideki Nakajima, Teera Butburee, Anyanee Kamkaew, Suwit Suthirakun, Theeranun Siritanon
Summary: Doping or ion substitution is widely used to improve the photocatalytic activities of semiconductors, and this study focuses on ion substitution in Bi2WO6. The electronegativity of the dopant can be used to tune the band-edge potentials, and this affects the photocatalytic mechanism. I-doped Bi2WO6 shows higher selectivity and improved morphologies, band-gap energy, and carrier recombination compared to Te-doped Bi2WO6. The findings highlight the importance of dopant choices in photocatalytic reactions.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Liang Bao, Yong-jun Yuan, Huaiwei Zhang, Xuefeng Zhang, Gang Xu
Summary: Hierarchical Bi2WO6 nanostructures with planar arranged nanosheets showed higher photocatalytic nitrogen fixation rate compared to dispersed nanosheets, attributed to chemisorption on the hierarchical structures and enhanced surface oxygen vacancies. The effect of EG dosage on the growth mechanism and behavior of the nanostructures was tested, indicating a potential strategy for improving photocatalytic performance.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Physical
Junlei Wang, Kuan Wang, Zhen-Hong He, Rong-Rong Zhang, Pengfei Guo, Weitao Wang, Yang Yang, Zhao-Tie Liu
Summary: In this study, ultrathin Bi2WO6/BiOCl heterojunction nanosheets were prepared by varying the amounts of potassium chloride (KCl) and used as catalysts for the efficient and selective photocatalytic oxidation of cyclohexane (CHA) in solvent-free conditions. The catalysts exhibited enhanced photo-absorption, abundant oxygen vacancies, high exposure of active facets, and efficient electron-hole separation, leading to significantly improved photocatalytic performance compared to pure BiOCl and Bi2WO6 catalysts. The study provides a prospective strategy for constructing Bi-based photocatalysts for the oxidation of CHA.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Lei Li, Jian Yang, Lei Yang, Fan Fu, Hao Xu, Ximei Fan
Summary: In this study, a trace Fe3+ doped TiO2/Bi2WO6 composite photocatalyst was successfully synthesized and showed enhanced photocatalytic activity for toluene degradation. The optimal molar ratio of TiO2 to Bi2WO6 was found to be 1:2. The improved photocatalytic activity was attributed to the extension of carrier lifetime, increase of visible light absorption range, and formation of oxygen vacancies. Hydroxyl radicals and holes were confirmed to be the key reactive oxygen species (ROS) involved in the photodegradation reaction.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Inorganic & Nuclear
Zhishen Cai, Junbo Zhong, Jianzhang Li, Haosong Jin
Summary: Conductive carbon (CC)/BiOBr composite photocatalysts were prepared by a one-pot solvothermal approach and their performance was analyzed through various techniques. The study found that the composite material showed better photocatalytic degradation performance for rhodamine B (RhB) compared to pure BiOBr. The separation and transfer mechanism of photoactivated electron-hole pairs in CC/BiOBr composites was discussed in detail.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Xingyun Jin, Shiyun Lei, Jiufu Chen, Junbo Zhong, Shulin Zhang, Xiaoqian Tang
Summary: The photocatalytic performance of bismuth tungstate (Bi2WO6) was significantly enhanced by the synergistic effect of oxygen vacancies (OVs) and surface plasmon resonance (SPR) of Bi-0. Treatment with NaBH4 solution regulated the OVs and Bi-0 content on the surface of Bi2WO6, leading to highly efficient separation of photogenerated carriers and increased degradation of organic pollutants. BWO-100 showed the highest photocatalytic performance, with degradation rates significantly higher than that of fresh Bi2WO6.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Qiao Tang, Jiang Wu, Xiang-Zhong Chen, Roger Sanchis-Gual, Andrea Veciana, Carlos Franco, Donghoon Kim, Ivan Surin, Javier Perez-Ramirez, Michele Mattera, Anastasia Terzopoulou, Ni Qin, Marija Vukomanovic, Bradley J. Nelson, Josep Luis, Salvador Pan
Summary: In this paper, oxygen vacancies (OVs) were introduced in Bi4Ti3O12 (BIT) nanosheets to enhance their piezo-photocatalytic performance. Compared to pristine BIT nanosheets, BIT with optimized OV concentration showed excellent piezo-photocatalytic activity, with a 2.2 times enhancement of the degradation rate constant for Rhodamine B (RhB). Density functional theory (DFT) calculations were used to investigate the effect of OVs on adsorption energy and Bader charges, providing insights into the underlying mechanism of OV enhanced piezo-photocatalytic activity. This study contributes to a deeper understanding of the regulation mechanism of OV enhanced piezo-photocatalytic activity and offers new approaches for designing high-performance piezo-photocatalysts.
Article
Chemistry, Physical
Rui Liu, Yingzhang Shi, Linghui Lin, Zhiwen Wang, Cheng Liu, Jinhong Bi, Yidong Hou, Sen Lin, Ling Wu
Summary: Ultrathin Bi2WO6 nanosheets with high concentration of surface oxygen vacancies were successfully used for the degradation of levofloxacin under visible light. The presence of oxygen vacancies not only accelerates the separation of charge carriers, but also activates oxygen molecules to generate reactive species. The study also provides insights into the factors influencing the degradation process.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Jian Shi, Chunying Chao, Yingying Gao, Hao Li, Suxiang Ge, Caixia Li, Xi Chen, Weiwei He
Summary: Designing an architecture that introduces oxygen vacancies (OVs) in ferroelectric materials without weakening the ferroelectric polarization has a positive effect on separating and inhibiting recombination of photogenerated carriers. This study reported an indirect strategy to form PTO@BiOCl-OVs heterojunction nanoplates by introducing BiOCl rich in OVs into the positive surface of ferroelectrics via a simple hydrothermal method and UV light irradiation. The 3% PTO@BiOCl-OVs heterojunction nanoplates showed excellent photocatalytic activity for RhB degradation under visible light. ESR signals confirmed the presence of reactive species such as O-2(-), center dot OH, and O-1(2).
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Jianping Shang, Zhiqi Xue, Bin Huang, Zhiqin Cao
Summary: SiO2/BiOCl composites were prepared by loading SiO2 nanoparticles onto the surface of BiOCl nanosheets. The composites showed enhanced photocatalytic efficiency due to the rich pore structures of BiOCl, which improved the separation efficiency of photogenerated carriers. The composites displayed high efficiency in degrading organic pollutants and exceptional stability.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Xiaoqian Xie, Qadeer-Ul Hassan, Huan Lu, Fei Rao, Jianzhi Gao, Gangqiang Zhu
Summary: This study prepared oxygen-deficient Bi2WO6 microspheres and deposited Bi-0 nanoparticles on the surface, enhancing photocatalytic activity. Bi-0@Bi2WO6-x exhibited the best NO removal activity under visible light irradiation. The presence of Bi-0 nanoparticles promoted photogenerated charge separation and transfer, while OVs defects facilitated reactants activation and active substance formation.
CHINESE CHEMICAL LETTERS
(2021)
Article
Materials Science, Multidisciplinary
A. Aly, M. Ghali, A. Osman, M. K. El Nimr
Summary: This study reports the discovery of naturally occurring luminescent graphene quantum dots (GQDs) in coconut water for the first time. The GQDs were identified through various measurements and were found to have dual sizes and emit different wavelengths of light. The GQDs were also utilized as an efficient optical sensor for aniline liquid detection.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Zehua Chen, Wencheng Ma, Qinglu Fan, Yanhua Liu, Min Sun, Shuo Wang
Summary: The nanoscale e-VOPO4 materials were successfully prepared by hydrothermal synthesis and calcination, showing high purity and suitable particle size. It exhibited satisfactory electrochemical performance as cathode material for sodium ion batteries, making it a potential candidate for high energy storage systems.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Tao Liu, Yahui Liu, Le Ling, Zhongxi Sheng, Zao Yi, Zigang Zhou, Yongjia Yang, Bin Tang, Qingdong Zeng, Tangyou Sun
Summary: In this paper, a terahertz (THz) micronano device that can switch between bimodal absorption and plasmon-induced transparency (PIT) is proposed. The device consists of layers of graphene, silica, and vanadium dioxide, and has a simple structure, easy tuning, and wide-angle absorption. The device achieves perfect absorption at specific frequencies and is highly sensitive to environmental refractive index. It also has the functions of a three-frequency asynchronous optical switch and slow light effect.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Xiaobo Luo, Songhan Hu, Qiudong Duan, Dacheng Zhou, Jialin Chen, Yugeng Wen, Jianbei Qiu
Summary: The exploration of solar light absorption by a material is important in photonics and optoelectronics. This study reveals the potential of Ba3-xGa2O6:xBi3+ as a promising candidate for various photonic and optoelectronic applications, and demonstrates the use of the material in double-sided laser printing for three-dimensional optical imaging.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Hemin Wang, Yanling Hao, Lele Xiang, Xiaosi Qi, Lei Wang, Junfei Ding, Yunpeng Qu, Jing Xu, Wei Zhong
Summary: This study designed Fe3O4-FeCO3/MWCNTs/RGO MCNCs composites and fabricated large-scale samples using hydrothermal and freeze-drying methods. The microstructural investigation showed that these materials had a mixed-dimensional structure, which improved impedance matching features, polarization, and conduction loss abilities, leading to significantly enhanced electromagnetic absorption properties.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Zhenshan Yu, Hao Chen, Xuequan Chen, Yu-Sheng Lin
Summary: This study presents a silicon dielectric metamaterial (SDM) composed of two outer symmetric semi-circular rings and two inner symmetric split-ring resonators (SRRs). The electromagnetic responses of the SDM device in different modes were studied through numerical simulations and experiments. Increasing the structure height of the SDM device resulted in red-shifted resonances and stronger intensities. This study provides a new design strategy for the development of frequency filtering, polarization switching, and resonance modulation characteristics in THz-wave applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Yiming Qi, Na Zhang, Meng Zong, Yangxianzi Liu, Weixing Chen
Summary: This study prepares dielectric/carbon fiber based nanocomposites wave-absorbing materials using liquid diffusion and high temperature carbonization strategies. By tuning the element type, drying mode, and filling amount, the electromagnetic parameters and absorbing properties can be adjusted. The best synthesized sample shows excellent absorbing performance, making it suitable for a wide range of electromagnetic wave absorption applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Carlos D. Gonzales-Lorenzo, T. K. Gundu Rao, Alberto A. Ccollque-Quispe, Jorge Ayala-Arenas, Monise B. Gomes, Betzabel N. Silva-Carrera, Roseli F. Gennari, Valeria S. Pachas, F. Monzon-Macedo, H. Loro, Jose F. D. Chubaci, Nilo F. Cano, Rene R. Rocca, Shigueo Watanabe
Summary: In this study, CaSiO3 doped with different ppm of Eu was synthesized using the devitrification method. Various physical properties were analyzed, revealing that the intensity and temperature of the high-temperature TL peak increased with higher dopant amounts. Fluorescence measurements indicated the presence of Eu2+ and Eu3+ ions in the samples. EPR spectra confirmed the existence of two defect centers.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Yanning Qu, Xinyang Li, Mei Cui, Renliang Huang, Wanquan Ma, Yunting Wang, Rongxin Su, Wei Qi
Summary: In this study, a new molybdenum disulfide/N,S-doped carbon quantum dots (MoS2/N,S-CQDs) heterojunction with enhanced light absorption and electrons transfer di-functional properties was constructed via a facile one-pot hydrothermal method. The heterojunction showed remarkable efficiencies in degrading methylene blue (MB) and malachite green (MG) in an actual water system under simulated sunlight irradiation. The facile synthetic technique and effective multifunctional properties of the composite have the potential for further research and industrial applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Jiayi Wang, Penggang Ren, Xueyan Zhao, Zhengyan Chen, Yanling Jin, Zengping Zhang
Summary: In this study, a novel homojunction photocatalyst was developed by combining defective g-C3N4 and flaked g-C3N4, which showed excellent degradation performance and cycling stability, and exhibited practicality in several simulation experiments.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Jing Yan, Xiaoxiao Zhao, Weixing Chen, Panbo Liu
Summary: This research presents a self-templated strategy to prepare a spherical superstructure of carbon nanorods through material modification and pyrolysis. The resulting material exhibits a large controllable radius of curvature and shows excellent microwave absorbing properties due to its high specific surface area and mesoporous structure.
MATERIALS RESEARCH BULLETIN
(2024)
Review
Materials Science, Multidisciplinary
Qinglin Zeng, Zepeng Lv, Shaolong Li, Bin Yang, Jilin He, Jianxun Song
Summary: Liquid metal batteries possess stable safety performance, high rate performance, and thermal stability. The electrolyte, an important component of the battery, plays a significant role in achieving these remarkable performance characteristics. This paper reviews the important research progress of liquid metal batteries electrolyte and discusses the influence of different electrolyte types on energy efficiency. It also highlights the limitations and challenges of existing electrolytes and proposes key development directions for liquid metal electrolytes.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Song Wu, Junli Wang, Xuanbing Wang, Di Jiang, Jinlong Wei, Xiaoning Tong, Zhenwei Liu, Qingxiang Kong, Naixuan Zong, Ruidong Xu, Linjing Yang
Summary: In this study, a composite electrode composed of Ti/TiH2/beta-PbO2_Mn3O4@C was fabricated and investigated for zinc electrowinning. The composite electrode exhibited low overpotential, Tafel slope, icorr, and high voltage stability, outperforming most reported Ti-based PbO2 electrode materials. The excellent catalytic activity can be attributed to the low resistance and porous interlayer of TiH2 nanosheets, as well as the addition of Mn3O4@C micro-flakes to the active layer.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
E. Tsoutsoumanos, T. Karakasidis, N. Laskaris, P. G. Konstantinidis, G. S. Polymeris, G. Kitis
Summary: This study investigates the correlation between nanocrystal dimensions and thermoluminescence signal magnitude through simulations conducted in Python. Two mathematical models, OTOR and IMTS, were used to derive theoretical luminescence signals. The obtained results were compared with experimental data and a thorough comparative discussion was conducted.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Vishnu Aggarwal, Sudhanshu Gautam, Aditya Yadav, Rahul Kumar, Bipul Kumar Pradhan, Brajesh S. Yadav, Govind Gupta, Senthil Kumar Muthusamy, Sumeet Walia, Sunil Singh Kushvaha
Summary: Recently, there has been a great demand for highly responsive photodetectors that can detect a wide range of wavelengths. Researchers have successfully fabricated a broadband metal-semiconductor-metal photodetector by integrating sputtered Bi2Se3 with laser molecular beam epitaxy grown GaN film. This photodetector shows high responsivity in both the ultraviolet and near-infrared regions.
MATERIALS RESEARCH BULLETIN
(2024)