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Recent advances on bismuth oxyhalides for photocatalytic CO_(2)reduction

Journal of Environmental Sciences 2024年第6期140卷 183-203页

作者： Liangpang Xu Jimmy C.Yu Ying Wang Department of Chemistry The Chinese University of Hong KongShatinNew TerritoriesHong Kong 999077China

Photocatalytic conversion of CO_(2)into fuels such as CO,CH_(4),and CH_(3)OH,is a promising approach for achieving carbon *** oxyhalides(BiOX,where X=Cl,Br,and I)are appropriate photocatalysts for this purpose due to the merits of visible-light-active,efficient charge separation,and easy-to-modify crystal structure and surface *** practical applications,multiple strategies have been proposed to develop high-efficiency BiOX-based *** review summarizes the development of different approaches to prepare BiOX-based photocatalysts for efficient CO_(2)*** the review,the fundamentals of photocatalytic CO_(2)reduction are ***,several widely used modification methods for BiOX photocatalysts are systematacially discussed,including heterojunction construction,introducing oxygen vacancies(OVs),Bi-enrichment,heteroatom-doping,and morphology ***,the challenges and prospects in the design of future BiOX-based photocatalysis for efficient CO_(2)reduction are examined.

关键词： bismuth oxyhalides Photocatalysis CO_(2)reduction Modification methods

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Origin of bismuth-Rich Strategy in bismuth Oxyhalide Photocatalysts

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Energy & Environmental Materials 2023年第5期6卷 460-467页

作者： Yang Wang Jiazhi Meng Shaojie Jing Kaiwen Wang Chaogang Ban Yajie Feng Youyu Duan Jiangping Ma Liyong Gan Xiaoyuan Zhou College of Physics and Institute of Advanced Interdisciplinary Studies Chongqing UniversityChongqing 401331China Beijing Key Laboratory of Microstructure and Property of Advanced Materials Beijing University of TechnologyBeijing 100024China State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 401331China Analytical and Testing Center Chongqing UniversityChongqing 401331China

Recently,the bismuth-rich strategy via increasing the bismuth content has been becoming one of the most appealing approaches to improve the photocatalytic performance of bismuth ***,insights into the mechanism behind the encouraging experiments are ***,we report the results of the theory-led comprehensive picture of bismuth-rich strategy in bismuth oxyhalide photocatalysts,selecting Bi_(5)O_(7)X(X=F,Cl,Br,I)as a ***-principle calculations revealed that the strategy enables good n-type conductivity,large intrinsic internal electric field,high photoreduction ability and outstanding harvest of visible light,and particularly ranked the intrinsic activity of this family:Bi_(5)O_(7)F>Bi_(5)O_(7)I>Bi_(5)O_(7)Br>Bi_(5)O_(7)*** experiments confirmed the theoretical predictions,and together,these results are expected to aid future development of advanced photocatalysts.

关键词： bismuth oxyhalides bismuth-rich strategy intrinsic activity photocatalytic reduction

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Regulating the Electronic Structure of Fe^(3+)‑Doped BiOCl_(x)I_(1-x)Solid Solution by an Amidoxime‑Functionalized Fibrous Support for Efficient Photocatalysis

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Advanced Fiber Materials 2023年第1期5卷 266-281页

作者： Zhenbang Han Mingze Lv Xianbing Shi Guobin Li Jin Zhao Xiaoming Zhao School of Textile Science and Engineering Tiangong UniversityTianjin 300387China Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage Tianjin 300387China

BiOX(X=Cl,I,Br)has attracted intensive interest as a photocatalyst for environmental remediation,but its limited pho-tocatalytic activity versus visible light irradiation restricts its practical ***,a Fe^(3+)-doped BiOCl_(x)I_(1-x)solid solution(Fe-BiOCl_(x)I_(1-x))was synthesized in situ on an amidoxime-functionalized fibrous support via a one-pot solvothermal *** characterization and DFT calculations indicate that the robust chelated interaction between ami-doxime groups and Fe^(3+)greatly boosts the crystal growth of nanosized Fe-BiOCl_(x)I_(1–x)on the fibrous surface,simultaneously tunes its electronic structure for improved light harvesting and oxygen vacancy creation,and enables the fibrous support to act as an electron sink for efficient charge *** synergistic qualities result in high photocatalytic activity for the degradation of organic contaminants,which outperforms that obtained for unsupported Fe-BiOCl_(x)I_(1-x)and other fibrous samples by several *** findings highlight the importance of functionalized support design for the development of efficient BiOX photocatalysts under visible light irradiation.

关键词： bismuth oxyhalides Fe doping Fiber-based catalyst Photocatalytic degradation

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One-photo excitation pathway in 2D in-plane heterostructures for effective visible-light-driven photocatalytic degradation

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Journal of Semiconductors 2023年第5期44卷 42-52页

作者： Mengchi Liu Yiwen Cheng Yuee Xie Yingcong Wei Jinhui Xing Yuanping Chen Jing Xu School of Physics and Electronic Engineering Jiangsu UniversityZhenjiang 212013China

Broad-spectrum absorption and highly effective charge-carrier separation are two essential requirements to improve the photocatalytic performance of semiconductor-based *** this work,a fascinating one-photon system is reported by rationally fabricating 2D in-plane Bi_(2)O_(3)/BiOCl(i-Cl)heterostructures for efficient photocatalytic degradation of RhB and *** investigations revealed that the matched band structure generated an internal electric field and a chemical bond connection between the Bi_(2)O_(3)and BiOCl in the Bi_(2)O_(3)/BiOCl composite that could effectively improve the utilization ratio of visible light and the separation effectivity of photo-generated carriers in *** formed interactions at the 2D in-plane heterojunction interface induced the one-photon excitation pathway which has been confirmed by the experiment and DFT *** a result,the i-Cl samples showed significantly enhanced photocatalytic efficiency towards the degradation of RhB and TC(RhB:0.106 min^(-1);TC:0.048 min^(-1))under visible *** degradation activities of RhB and TC for i-Cl were 265.08 and 4.08times that of pure BiOCl,as well as 9.27 and 2.14 times that of mechanistically mixed Bi_(2)O_(3)/BiOCl samples,*** work provides a logical strategy to construct other 2D in-plane heterojunctions with a one-photon excitation pathway with enhanced performance.

关键词： photocatalysis CAU-17 bismuth oxyhalides one-photon excitation pathway 2D in-plane heterojunction

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