Although Bi_(7)O_(9)I_(3) is an oxygen-rich bismuth oxyiodide with higher photocatalytic activity than BiOI,its applicability for photocatalytic oxidation is limited by the rapid recombination of photogenerated carrie...Although Bi_(7)O_(9)I_(3) is an oxygen-rich bismuth oxyiodide with higher photocatalytic activity than BiOI,its applicability for photocatalytic oxidation is limited by the rapid recombination of photogenerated carriers and poor reusability.Depositing Bi_(7)O_(9)I_(3) on flexible macro-sized carbonaceous materials is a promising approach for promoting photogenerated electron migration and improving reusability.In this study,a composite consisting of Bi_(7)O_(9)I_(3) supported on graphitic carbon paper(Bi_(7)O_(9)I_(3)-CP)was synthesized via the in situ transformation of a BiOl-deposited carbon paper precursor(BiOl-CP).The as-prepared Bi_(7)O_(9)I_(3)-CP exhibited higher visible-light-driven photocatalytic activity than both Bi_(7)O_(9)I_(3) and BiOI-CP precursor for phenol removal.The improved photocatalytic activity of Bi_(7)O_(9)I_(3)-CP was attributed to its hierarchical structure and promoted carrier separation,as revealed by photoluminescence,pore structure,and reactive radical analyses.Moreover,owing to its macroscale size and flexibility,the Bi_(7)O_(9)I_(3)-CP composite could be easily operated and reused,which are favorable for practical applications.展开更多
基金National Natural Science Foundation of China(Nos.52073034,21871030)Natural Science Foundation of Hunan Province of China(No.2018JJ2457)Scientific Research Foundation of Hunan Provincial Education Department of China(No.18A370).
文摘Although Bi_(7)O_(9)I_(3) is an oxygen-rich bismuth oxyiodide with higher photocatalytic activity than BiOI,its applicability for photocatalytic oxidation is limited by the rapid recombination of photogenerated carriers and poor reusability.Depositing Bi_(7)O_(9)I_(3) on flexible macro-sized carbonaceous materials is a promising approach for promoting photogenerated electron migration and improving reusability.In this study,a composite consisting of Bi_(7)O_(9)I_(3) supported on graphitic carbon paper(Bi_(7)O_(9)I_(3)-CP)was synthesized via the in situ transformation of a BiOl-deposited carbon paper precursor(BiOl-CP).The as-prepared Bi_(7)O_(9)I_(3)-CP exhibited higher visible-light-driven photocatalytic activity than both Bi_(7)O_(9)I_(3) and BiOI-CP precursor for phenol removal.The improved photocatalytic activity of Bi_(7)O_(9)I_(3)-CP was attributed to its hierarchical structure and promoted carrier separation,as revealed by photoluminescence,pore structure,and reactive radical analyses.Moreover,owing to its macroscale size and flexibility,the Bi_(7)O_(9)I_(3)-CP composite could be easily operated and reused,which are favorable for practical applications.
