Citation: Jieyuan Li, Ping Yan, Kanglu Li, Wanglai Cen, Xiaowei Yu, Shandong Yuan, Yinghao Chu, Zhengming Wang. Generation and transformation of ROS on g-C₃N₄ for efficient photocatalytic NO removal: A combined in situ DRIFTS and DFT investigation[J]. Chinese Journal of Catalysis, ;2018, 39(10): 1695-1703. doi: 10.1016/S1872-2067(18)63097-9 shu

Generation and transformation of ROS on g-C₃N₄ for efficient photocatalytic NO removal: A combined in situ DRIFTS and DFT investigation

a College of Architecture and Environment, Sichuan University, Chengdu 610065, Sichuan, China;
b Institute of New Energy and Low Carbon Technology, Sichuan University, Chengdu 610065, Sichuan, China;
c Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology, 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan;
d South China Institute of Environmental Sciences, the Ministry of Environmental Protection of PRC, Guangzhou 510655, Guangdong, China

Received Date: 21 April 2018
Revised Date: 7 May 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (51508356), Science and Technology Support Program of Sichuan Province (2014GZ0213,2016GZ0045), and Youth Project in Science and Technology Innovation Program of Sichuan Province (17-YCG053).

Understanding the performance of reactive oxygen species (ROS) in photocatalysis is pivotal for advancing their application in environmental remediation. However, techniques for investigating the generation and transformation mechanism of ROS have been largely overlooked. In this study, considering g-C₃N₄ to be a model photocatalyst, we have focused on the ROS generation and transformation for efficient photocatalytic NO removal. It was found that the key to improving the photocatalysis performance was to enhance the ROS transformation from ·O₂^- to ·OH, elevating the production of ·OH. The ROS directly participate in the photocatalytic NO removal and tailor the rate-determining step, which is required to overcome the high activation energy of the intermediate conversion. Using a closely combined experimental and theoretical method, this work provides a new protocol to investigate the ROS behavior on g-C₃N₄ for effective NO removal and clarifies the reaction mechanism at the atomic level, which enriches the understanding of ROS in photocatalytic environmental remediation.
- Photocatalysis,
- Reactive oxygen species,
- g-C₃N₄,
- NO removal,
- Reaction mechanism
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通讯作者: 陈斌, bchen63@163.com

Generation and transformation of ROS on g-C₃N₄ for efficient photocatalytic NO removal: A combined in situ DRIFTS and DFT investigation