Enhanced photocatalytic activity induced by sp3 to sp2 transition of carbon dopants in BiOCl crystals

被引：67

作者：

Sun, Jianguo ^{[1
]}

Wu, Sujuan ^{[1
,2
]}

Yang, Shi-Ze ^{[2
]}

Li, Qi ^{[1
]}

Xiong, Jiawei ^{[1
]}

Yang, Zhenzhong ^{[3
]}

Gu, Lin ^{[3
]}

Zhang, Xixiang ^{[4
]}

Sun, Lidong ^{[1
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, Electron Microscopy Ctr, Chongqing 400044, Peoples R China

[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[3] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[4] KAUST, Div Phys Sci & Engn, Thuwal 239556900, Saudi Arabia

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2018年 / 221卷

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

Photocatalysis; BiOCl; Carbon doping; Surface defects engineering; 2D materials; TOTAL-ENERGY CALCULATIONS; VISIBLE-LIGHT ABSORPTION; ELECTRONIC-STRUCTURE; RAMAN-SPECTROSCOPY; GRAPHENE;

D O I：

10.1016/j.apcatb.2017.09.037

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：

The insufficient light absorption and low quantum efficiency limit the photocatalytic performance of wide bandgap semiconductors. Here, we report a facile strategy to engineer the surface disordered defects of BiOCl nanosheets via carbon doping. The surface defects boost the light absorption and also the quantum yields, as the doped carbon atoms exhibit a transition from sp(3) to sp(2) hybridization at elevated temperature, corresponding to a change of assembly state from 3D cluster to 2D graphite-like structure. This transition results in an effective charge separation and thus one order of enhancement in photocatalytic activity toward phenol degradation under visible light. The current study opens an avenue to introduce sp(3) to sp(2) transition of carbon dopants for simultaneous increment of light absorption and quantum efficiency for application in photocatalysis and energy conversion.

引用

页码：467 / 472

页数：6