Regulating the crystal phase of bismuth-based semiconductors for promoted photocatalytic performances
image: The phase and phase transition regulation of bismuth-based semiconductors (BBSs) were systematically presented. The critical factors for phase transition and intrinsic driving forces endowed by phases of BBSs for enhanced photocatalytic performances of organic contaminants removal were also elucidated.
Credit: ©Science China Press
This review is led by Dr. Zhaohui Wu (Hunan Key Laboratory of Applied Environmental Photocatalysis) and Prof. Yongfa Zhu (Department of Chemistry, Tsinghua University). The review summarized the phase and phase transition regulation of bismuth-based semiconductors (BBSs) systematically. And the critical factors for phase transition of BBSs and intrinsic driving forces endowed by phases of BBSs for enhanced photodegradation performances were also elucidated.
Semiconductor photocatalysis, as feasible technology converting clean and inexhaustible solar light to generate charge carriers and active oxides for photocatalytic degradation of organic contaminants in wastewater, have boosted the exploration of efficient semiconductors and structure-performance strategy. Numerous bismuth-based semiconductors (BBSs) with sophisticated and desirable structures used as photocatalysts for efficient photocatalytic degradation of water organic contaminants have been attracted considerable attentions. However, regulating the crystal phases and phase transition of BBSs for promoted photocatalytic performances always being ignored. Herein, the unique crystal structure and band structures features of each typical BBSs, and the vital roles on phase controlling of each phase were systematically presented based on the classification of BBSs. Notably, the critical factors for phase transition of BBSs, and intrinsic driving forces referring internal electric field and band structure alignment, which are endowed by phases of BBSs for enhanced photocatalytic performances of organic contaminants removal were also elucidated. This review will provide systematical guidelines and horizons for regulating the crystal phase and phase transition of BBSs, promoting photocatalytic degradation and mineralization of organic contaminants.
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Regulating the crystal phase of bismuth-based semiconductors for promoted photocatalytic performances