Tailoring morphology symmetry of bismuth vanadate photocatalysts for efficient charge separation

作     者：Yuting Deng Hongpeng Zhou Chenwei Ni Fengke Sun Wenchao Jiang Ruotian Chen Wenming Tian Can Li Rengui Li Yuting Deng;Hongpeng Zhou;Chenwei Ni;Fengke Sun;Wenchao Jiang;Ruotian Chen;Wenming Tian;Can Li;Rengui Li

作者机构：State Key Laboratory of CatalysisDalian National Laboratory for Clean EnergyiChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Molecular Reaction Dynamics and the Dynamic Research Center for Energy and Environmental MaterialsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2023年第66卷第12期

页      面：3611-3619页

核心收录：

学科分类：07[理学] 081705[工学-工业催化] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the National Key Research and Development Program of China (2021YFA1502300) by the Fundamental Research Funds for the Central Universities (20720220011) conducted by the Fundamental Research Center of Artificial Photosynthesis (FReCAP) financially supported by the National Natural Science Foundation of China (22088102) the support from National Natural Science Foundation of China (22090033, 22272165) Youth Innovation Promotion Association of Chinese Academy of Sciences and the National Youth Talent Support Program。 

主　　题：bismuth vanadate morphology symmetry tailoring photocatalysis spatial charge separation 

摘      要：Although spatial charge separation between different facets of semiconductor crystals has been recognized as a general strategy in photocatalysis, the vital role of crystal morphology symmetry in charge separation properties still remains elusive. Herein,taking monoclinic bismuth vanadate(BiVO_(4)) as a platform, we found distinct charge separation difference via rationally tailoring the morphology symmetry from octahedral to truncated octahedral crystals. For octahedral BiVO_(4), photogenerated electrons and holes can be separated between edges and quasi-equivalent facets. However, as for truncated octahedral crystals,photogenerated electrons tend to transfer to {010} facets while photogenerated holes prefer to accumulate on {120} facets, thus realizing the spatial separation of photogenerated charge between different facets. Morphology tailoring of BiVO_(4) crystals leads to a significantly improved photogenerated charge separation efficiency and photocatalytic water oxidation activity. The built-in electric field for driving the separation of photogenerated electrons and holes is considered to be modulated by tuning the morphology symmetry of BiVO_(4) crystals. This work discloses the significant roles of morphology symmetry in photogenerated charge separation and facilitates the rational design of artificial photocatalysts.