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

Abstract

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 sp3 to sp2 hybridization at elevated temperature, corresponding toa 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 sp3 to sp2 transition of carbon dopants for simultaneous increment of light absorption and quantum efficiency for application in photocatalysis and energy conversion.

Authors:
 [1];  [2];  [3];  [1];  [1];  [4];  [4];  [5];  [1]
  1. Chongqing University, Chongqing (China). Electron Microscopy Center of Chongqing University, College of Materials Science and Engineering
  2. Chongqing University, Chongqing (China). Electron Microscopy Center of Chongqing University, College of Materials Science and Engineering; Oak Ridge National Laboratory. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  3. Oak Ridge National Laboratory. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  4. Chinese Academy of Sciences, Beijing (China). Beijing National Laboratory for Condensed Matter Physics, Institute of Physics
  5. King Abdullah University of Science and Technology. (KAUST), Thuwal (Saudi Arabia). Division of Physical Science and Engineering
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
OSTI Identifier:
1462040
DOE Contract Number:  
AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Applied Catalysis B: Environmental
Additional Journal Information:
Journal Volume: 221; Journal Issue: C; Journal ID: ISSN 0926-3373
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

Sun, Jianguo, Wu, Sujuan, Yang, Shi-Ze, Li, Qi, Xiong, Jiawei, Yang, Zhenzhong, Gu, Lin, Zhang, Xixiang, and Sun, Lidong. Enhanced photocatalytic activity induced by sp3 to sp2 transition of carbon dopants in BiOCl crystals. United States: N. p., 2018. Web. doi:10.1016/j.apcatb.2017.09.037.
Sun, Jianguo, Wu, Sujuan, Yang, Shi-Ze, Li, Qi, Xiong, Jiawei, Yang, Zhenzhong, Gu, Lin, Zhang, Xixiang, & Sun, Lidong. Enhanced photocatalytic activity induced by sp3 to sp2 transition of carbon dopants in BiOCl crystals. United States. https://doi.org/10.1016/j.apcatb.2017.09.037
Sun, Jianguo, Wu, Sujuan, Yang, Shi-Ze, Li, Qi, Xiong, Jiawei, Yang, Zhenzhong, Gu, Lin, Zhang, Xixiang, and Sun, Lidong. 2018. "Enhanced photocatalytic activity induced by sp3 to sp2 transition of carbon dopants in BiOCl crystals". United States. https://doi.org/10.1016/j.apcatb.2017.09.037.
@article{osti_1462040,
title = {Enhanced photocatalytic activity induced by sp3 to sp2 transition of carbon dopants in BiOCl crystals},
author = {Sun, Jianguo and Wu, Sujuan and Yang, Shi-Ze and Li, Qi and Xiong, Jiawei and Yang, Zhenzhong and Gu, Lin and Zhang, Xixiang and Sun, Lidong},
abstractNote = {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 sp3 to sp2 hybridization at elevated temperature, corresponding toa 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 sp3 to sp2 transition of carbon dopants for simultaneous increment of light absorption and quantum efficiency for application in photocatalysis and energy conversion.},
doi = {10.1016/j.apcatb.2017.09.037},
url = {https://www.osti.gov/biblio/1462040}, journal = {Applied Catalysis B: Environmental},
issn = {0926-3373},
number = C,
volume = 221,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 2018},
month = {Thu Feb 01 00:00:00 EST 2018}
}