Статья

Three‐in‐One Oxygen Vacancies: Whole Visible‐Spectrum Absorption, Efficient Charge Separation, and Surface Site Activation for Robust CO<sub>2</sub> Photoreduction

Hongjian YuBeijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes School of Materials Science and Technology China University of Geosciences Beijing 100083 ChinaJieyuan LiCollege of Architecture and Environment Sichuan University Chengdu, Sichuan 610065 ChinaYihe ZhangBeijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes School of Materials Science and Technology China University of Geosciences Beijing 100083 ChinaSongqiu YangState Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics Chinese Academy of Sciences Zhongshan Road 457 Dalian 116023 ChinaKeli HanState Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics Chinese Academy of Sciences Zhongshan Road 457 Dalian 116023 ChinaFan DongResearch Center for Environmental Science & Technology Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 611731 ChinaTianyi MaDiscipline of Chemistry The University of Newcastle Callaghan NSW 2308 AustraliaHongwei HuangBeijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes School of Materials Science and Technology China University of Geosciences Beijing 100083 China

2019en

ABI

Аннотация

Abstract A facile and controllable in situ reduction strategy is used to create surface oxygen vacancies (OVs) on Aurivillius‐phase Sr 2 Bi 2 Nb 2 TiO 12 nanosheets, which were prepared by a mineralizer‐assisted soft‐chemical method. Introduction of OVs on the surface of Sr 2 Bi 2 Nb 2 TiO 12 extends photoresponse to cover the whole visible region and also tremendously promotes separation of photoinduced charge carriers. Adsorption and activation of CO 2 molecules on the surface of the catalyst are greatly enhanced. In the gas‐solid reaction system without co‐catalysts or sacrificial agents, OVs‐abundant Sr 2 Bi 2 Nb 2 TiO 12 nanosheets show outstanding CO 2 photoreduction activity, producing CO with a rate of 17.11 μmol g −1 h −1 , about 58 times higher than that of the bulk counterpart, surpassing most previously reported state‐of‐the‐art photocatalysts. Our study provides a three‐in‐one integrated solution to advance the performance of photocatalysts for solar‐energy conversion and generation of renewable energy.

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Идентификаторы

DOI: 10.1002/anie.201813967

Цитирования и источники

Цитирований: 3Использованных источников: 0

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