Acid gas-induced fabrication of hydrophilic carbon nitride with dual defects for boosting photocatalytic H2O2 generation and contaminants degradation

被引:2
作者
Li, Na [1 ]
Wang, Chen [1 ]
Gao, Wei [1 ]
Li, Wenli [1 ]
Li, Binrong [1 ]
Wang, Xuedong [1 ]
机构
[1] Suzhou Univ Sci & Technol, Sch Environm Sci & Engn, Natl & Local Joint Engn Lab Municipal Sewage Resou, Suzhou 215009, Peoples R China
基金
中国国家自然科学基金;
关键词
Defected carbon nitride; Hydrogen peroxide synthesis; Photocatalytic oxygen reduction; Superoxide radical; Degradation; HYDROGEN-PEROXIDE; ELECTROCHEMICAL SYNTHESIS; SINGLE-ATOM; NANOSHEETS; ENHANCEMENT; STATE; WATER; H2O2;
D O I
10.1016/j.seppur.2024.129978
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
An acid gas-induced strategy was proposed to fabricate a series of PCNs with dual-defects and surface hydroxyl group (DDH-PCNs) for photocatalytic H2O2 generation and trace organic contaminants (TrOCs) degradation. The Nv can accelerate the O2 adsorption and activation by formation a bridge C-O-O-C model. Accompanied cyano groups provide the asymmetric electron distribution for carriers' separation. Moreover, the surficial hydroxyl groups provide more protons for photocatalytic H2O2 production. As a result, the DDH-PCNs showed an excellent photocatalytic H2O2 rate of 5554.6 mu mol g- 1 h- 1 under full spectrum irradiation, and it can also degrade SMX (100 mu g/L) completely in 5 min. Notably, the optimal DDH-PCN(1.6) can simultaneously achieve photocatalytic H2O2 production and SMX degradation in a wastewater/alcohol system. The rapid formation of the intermediate superoxide radical (2.44 min- 1) is the key to above dual functions. Our findings provide profound insights into center dot O2- manipulation and development of dual functional photocatalytic system towards environmental application.
引用
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页数:11
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