Citation: Xinxia He, Hongyan Shang, Chuan Wang, Le Chen, Zehan Gong, Jun Wang, Shilin Zhao, Jun Ma. Significantly influenced photocatalytic performance for H₂O₂ generation over ultrathin g-C₃N₄ through regulating the migration orientation of photogenerated charge carriers[J]. Chinese Chemical Letters, ;2021, 32(11): 3377-3381. doi: 10.1016/j.cclet.2021.04.028 shu

Significantly influenced photocatalytic performance for H₂O₂ generation over ultrathin g-C₃N₄ through regulating the migration orientation of photogenerated charge carriers

Xinxia He ^{a, 1} ,
Hongyan Shang ^{a, b, 1} ,
Chuan Wang ^a ,
Le Chen ^a ,
Zehan Gong ^a ,
Jun Wang ^c ,
Shilin Zhao ^{b, *,} ,
Jun Ma ^{a, b, *,}

a.
College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, China
b.
Key Laboratory of Land Resources Evaluation and Monitoring in Southwest, Ministry of Education of China, Chengdu 610066, China
c.
State Key Laboratory of Environmental-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China

zhaoslin@aliyun.com

Majun0514@sicnu.edu.cn

Received Date: 11 January 2021
Revised Date: 8 February 2021
Accepted Date: 16 April 2021
Available Online: 22 April 2021

Figures(4)

H₂O₂ has been widely applied in the fields of chemical synthesis, medical sterilization, pollutant removal, etc., due to its strong oxidizing property and the avoidable secondary pollution. Despite of the enhanced performance for H₂O₂ generation over g-C₃N₄ semiconductors through promoting the separation of photo-generated charge carriers, the effect of migration orientation of charge carriers is still ambiguous. For this emotion, surface modification of g-C₃N₄ was employed to adjust the migration orientation of charge carriers, in order to investigate systematically its effect on the performance of H₂O₂ generation. It was found that ultrathin g-C₃N₄ (UCN) modified by boron nitride (BN), as an effective hole-attract agent, demonstrated a significantly enhanced performance. Particularly, for the optimum UCN/BN-40% catalyst, 4.0-fold higher yield of H₂O₂ was obtained in comparison with the pristine UCN. As comparison, UCN modified by carbon dust demonstrated a completely opposite tendency. The remarkably improved performance over UCN/BN was ascribed to the fact that more photo-generated electrons were remained inside of triazine structure of g-C₃N₄, leading to the formation of larger amount of 1, 4-endoxide. It is anticipated that our work could provide new insights for the design of photocatalyst with significantly improved performance for H₂O₂ generation.
- Ultra-thin g-C₃N₄,
- Photocatalytic H₂O₂ production,
- Photogenerated charge carriers,
- Migration orientation
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Significantly influenced photocatalytic performance for H2O2 generation over ultrathin g-C3N4 through regulating the migration orientation of photogenerated charge carriers

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通讯作者: 陈斌, bchen63@163.com

Significantly influenced photocatalytic performance for H₂O₂ generation over ultrathin g-C₃N₄ through regulating the migration orientation of photogenerated charge carriers