Article
Chemistry, Physical
Ghader Hosseinzadeh, Seyed Mehdi Sajjadi, Loghman Mostafa, Alireza Yousefi, Reza Hadjiaghaie Vafaie, Sahar Zinatloo-Ajabshir
Summary: In this study, a direct Z-scheme heterojunction nanocomposite with abundant oxygen vacancy defects was fabricated and used as a powerful photocatalyst for decomposition of the insecticide nitenpyram. The findings showed that the nanocomposite with 30wt% of SrTiO3 had the best photocatalytic efficiency. The improvement in photocatalytic ability was attributed to the existence of oxygen vacancy defects, facilitating charge carriers separation and effective generation of radicals. The study also detected possible decomposition intermediates of nitenpyram through HPLC-MS analysis.
SURFACES AND INTERFACES
(2023)
Article
Environmental Sciences
Xiao Qu, Jianbin Lin, Wei Qiang, Chuntao Chen, Dongping Sun
Summary: Photocatalytic activity of Titanium dioxide (TiO2) can be enhanced through structural regulation by chemical reduction method. The modified TiO2 samples show strong light absorption ability and exhibit excellent degradation performance for various organic pollutants.
Article
Chemistry, Multidisciplinary
Siwen Gong, Fei Rao, Weibin Zhang, Qadeer-Ul Hassan, Zhaoqing Liu, Jianzhi Gao, Jiangbo Lu, Mirabbos Hojamberdiev, Gangqiang Zhu
Summary: In this study, BiOCl was synthesized and treated to introduce oxygen vacancies. Au nanoparticles were loaded to enhance the light absorption and charge carrier separation. The presence of oxygen vacancies and Au nanoparticles significantly improved the performance of CO2 reduction reactions, providing an effective strategy for photocatalytic CO2 reduction.
CHINESE CHEMICAL LETTERS
(2022)
Article
Engineering, Environmental
Mingyang Liu, Hangqi Zhu, Nali Zhu, Qilin Yu
Summary: This study focused on vacancy engineering of BiOCl photocatalysts to enhance their bacterium-binding activity for removal of both MDR bacteria and ARGs. It was found that VBiO microspheres exhibited higher adsorption capacity to bacterial cell wall components and led to stronger binding to bacterial cells, resulting in efficient removal of MDR bacteria.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Yaoyao Wu, Yunxuan Hu, Muqiao Han, Yiming Ouyang, Lichao Xia, Xiongfei Huang, Zhuofeng Hu, Chuanhao Li
Summary: The photocatalytic degradation of per- and polyfluoroalkyl substances (PFAS) using BiOCl nanosheets with {010} or {001} facets showed that {010}-BiOCl exhibited higher catalytic activity compared to {001}-BiOCl in the degradation of perfluorooctanoic acid (PFOA). The higher catalytic activity of {010}-BiOCl was attributed to the in-situ generated surface oxygen vacancies and strong interaction with PFOA molecules. Furthermore, the nanosheets with {010} facets showed the highest adsorption capacity and lowest adsorption energy for PFOA molecules, while photogenerated holes and surface hydroxyl radicals on {010} facets played a significant role in the degradation process. Additionally, F- ions as by-products tended to block the catalytic sites but could be removed using a simple chemical precipitation approach with Ca2+ ions to recover the catalytic performance.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Zhi-Peng Ma, Linnan Zhang, Xue Ma, Fa-Nian Shi
Summary: This study prepared BiOCl with a specific crystal facet and constructed oxygen vacancies, improving the photocatalyst activity and generation of free radicals. The degradation rate of tetracycline hydrochloride was significantly enhanced by the synergistic effect of hierarchical structure and oxygen vacancy defects.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Changyan Chen, Ting Jiang, Jianhua Hou, Tingting Zhang, Geshan Zhang, Yongcai Zhang, Xiaozhi Wang
Summary: In this study, a high-efficiency photocatalytic BiOCl material with visible light absorption range was successfully synthesized using a one-pot molecular self-assembly and particle recrystallization method. The hierarchical structure and oxygen vacancies in the material improved its photocatalytic performance and enabled effective degradation of organic pollutants.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Jing Chen, Qifang Ren, Yi Ding, Chunyu Xiong, Wanmi Guo
Summary: The study prepared Ag/BiOCl/diatomite composite material with high efficiency in degrading tetracycline and antimicrobial activity, proving the stability and catalytic performance of the material. A possible photocatalytic degradation mechanism involving oxygen vacancies, superoxide radicals, holes, and hydroxyl radicals was proposed.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Xiaozhou Zhao, Yuguo Xia, Haiping Li, Xiang Wang, Jing Wei, Xiuling Jiao, Dairong Chen
Summary: The study identifies the oxygen vacancy concentration as linearly correlated with solar fuel yield in the photocatalytic activity of atomically thin BiOCl nanosheets. The presence of a weak p-sigma bond in the Bi-C-O-Bi geometry is responsible for the improved CO yield and selectivity. This work sets the stage for further exploration in the design of atomically thin 2D vdW photocatalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Kaiqiang Xu, Difa Xu, Zhongfu Li, Shumin Zhang, Liangcheng Tong, Jinghuan Peng, Shiying Zhang, Jie Shen, Xiaohua Chen
Summary: Bulk iodine doped BiOCl prepared through a molten salt method introduced iodine atoms and created rich oxygen vacancies, leading to higher visible-light absorption and photocatalytic activity. The optimized bulk iodine doped BiOCl demonstrated 12 times greater rate constant in ciprofloxacin hydrochloride photodegradation compared to pristine BiOCl, with enhanced carrier separation and suppressed recombinations contributing to its superior photocatalytic degradation activity.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Min Zhao, Yajun Yang, Zhenxing Zha, Shihai Cui, Yafei Li, Jing Yang
Summary: A carbon microsphere/BiOCl heterojunction with oxygen vacancy was synthesized by the hydrothermal method, and its structure, morphology, and physicochemical properties were investigated. The composite exhibited twice the photocatalytic activity for tetracycline degradation compared to pure BiOCl. The degradation products and pathways of tetracycline were analyzed using fluorescence spectroscopy and Fukui indices, and the possible photocatalytic mechanism was explored.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Qi Li, Jie Ren, Ying-juan Hao, Yi-lei Li, Xiao-jing Wang, Ying Liu, Ran Su, Fa-tang Li
Summary: The study found that hydroxyl radicals in H-BiOCl have a reverse inhibitory effect on the ring-opening reaction in the photocatalytic mineralization process of toluene, while C-BiOCl shows superior ability and stability in mineralizing toluene. This is because C-BiOCl lacking hydroxyl groups can selectively generate benzoic acid by holes and superoxide anion radicals; whereas H-BiOCl with a large number of hydroxyl groups will lead to the production of hydroxyl radicals and phenolic intermediates, reducing the performance and stability of the catalyst.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Nanoscience & Nanotechnology
Shuwen Cheng, Zhehao Sun, Kang Hui Lim, Tianxi Zhang, Emmerson Hondo, Tao Du, Liying Liu, Martyna Judd, Nicholas Cox, Zongyou Yin, Gang Kevin Li, Sibudjing Kawi
Summary: In this study, uniform BiOCl hierarchical nanoflowers with tunable thickness and abundant oxygen vacancies (OVs) were synthesized. The OV-rich BiOCl nanoflower showed a significant increase in photocatalytic conversion of CO2 to CO compared to BiOCl nanosheets. Analysis and calculations revealed the anisotropy in CO2 reduction activity across different crystal facets, and the morphology affected the conduction band and band gap, resulting in a more negative CB edge for BiOCl compared to CO2 reduction potential.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Liangliang Chang, Yongping Pu, Panpan Jing, Jiamin Ji, Xiaohong Wei, Baoyue Cao, Yan Yu, Shan Xu, Haijiao Xie
Summary: An oxygen-vacancy-rich CuWO4/BiOCl composite was synthesized and displayed excellent photocatalytic degradation performance for norfloxacin. The enhanced activity was attributed to the formation of a Z-scheme structure by combining CuWO4 and Vo-BiOCl. The Z-scheme structure exhibited efficient carrier separation and higher redox ability.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Yuhao Zhang, Liang Guo, Qunang Xu, Qingmao Zhang, Jiaming Li, Qiongxiong Ma
Summary: In this study, undoped and Sr-doped LaNiO3-sigma nanoparticles were successfully prepared and their photocatalytic performance was investigated. The results showed that Sr-doping could introduce more oxygen vacancy and improve the photocatalytic performance of LaNiO3-sigma.
