A photochromic composite with enhanced carrier separation for the photocatalytic activation of benzylic C-H bonds in toluene

被引：336

作者：

Cao, Xing ^{[1
]}

Chen, Zheng ^{[1
]}

Lin, Rui ^{[1
]}

Cheong, Weng-Chon ^{[1
]}

Liu, Shoujie ^{[2
]}

Zhang, Jian ^{[1
]}

Peng, Qing ^{[1
]}

Chen, Chen ^{[1
]}

Han, Tong ^{[1
]}

Tong, Xuanjue ^{[1
]}

Wang, Yu ^{[1
]}

Shen, Rongan ^{[1
]}

Zhu, Wei ^{[1
]}

Wang, Dingsheng ^{[1
]}

Li, Yadong ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing, Peoples R China

[2] Anhui Normal Univ, Coll Chem & Mat Sci, Wuhu, Peoples R China

来源：

NATURE CATALYSIS | 2018年 / 1卷 / 09期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

VISIBLE-LIGHT; HYDROGEN-PRODUCTION; OXYGEN VACANCIES; ANION-EXCHANGE; OXIDATION; CATALYSIS; NANOSHEETS; REDUCTION; OXIDE; NANOPARTICLES;

D O I：

10.1038/s41929-018-0128-z

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photocatalysis based on the use of semiconducting materials is an emerging alternative to conventional thermochemical catalysis, and it has the potential to promote chemical synthesis under greener and milder conditions. However, heterogeneous photocatalytic organic reactions are still in their infancy, limited by the low-efficiency carrier separation of the currently available photocatalytic materials. Here, we report photochromic Bi2WO6-x/amorphous BiOCI (p-BWO) nanosheets, which, distinct from pristine Bi2WO6, show blue colouration upon visible light irradiation and are bleached by atmospheric oxygen. Studies on the microscopic structure of the material reveal the existence of abundant W(VI)O6-x units, which serve as the sites for the fast and continuous consumption of photogenerated electrons, thereby effectively facilitating the separation of electron-hole pairs. The prepared composite features a remarkable enhancement in performance for the photocatalytic oxidation of toluene with a conversion rate 166-fold higher compared with that of pristine Bi2WO6.

引用

页码：704 / 710

页数：7

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