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|Title:||Three-in-one oxygen vacancies: whole visible-spectrum absorption, efficient charge separation, and surface site activation for robust CO₂ photoreduction|
|Other Titles:||Three-in-one oxygen vacancies: whole visible-spectrum absorption, efficient charge separation, and surface site activation for robust CO(2) photoreduction|
|Citation:||Angewandte Chemie International Edition, 2019; 58(12):3880-3884|
|Hongjian Yu, Jieyuan Li, Yihe Zhang, Songqiu Yang, Keli Han, Fan Dong, Tianyi Ma, Hongwei Huang|
|Abstract:||A facile and controllable in situ reduction strategy is used to create surface oxygen vacancies (OVs) on Aurivillius-phase Sr₂ Bi₂ Nb₂ TiO₁₂ nanosheets, which were prepared by a mineralizer-assisted soft-chemical method. Introduction of OVs on the surface of Sr₂ Bi₂ Nb₂ TiO₁₂ extends photoresponse to cover the whole visible region and also tremendously promotes separation of photoinduced charge carriers. Adsorption and activation of CO₂ molecules on the surface of the catalyst are greatly enhanced. In the gas-solid reaction system without co-catalysts or sacrificial agents, OVs-abundant Sr₂ Bi₂ Nb₂ TiO₁₂ nanosheets show outstanding CO₂ 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.|
|Keywords:||CO2 reduction; Sr2Bi2Nb2TiO12 nanosheets; charge separation; oxygen vacancies; photocatalysis|
|Rights:||© 2019 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim|
|Appears in Collections:||Chemistry publications|
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