文献类型：期刊文献

英文题名：Carbon defects-enriched NBC-C 3 N 5 @CoMn with ultrafast modulation of redox couples for efficient degradation of contaminant

作者：Bai, He[1];Yang, Yuxiang[1];Yuan, Hongming[2];Huang, Yan[1];Liu, Xiangnong[3];Ni, Chaoying[4]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Jilin Univ, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China;[3]Yangzhou Univ, Anal Test Ctr, Yangzhou 225009, Peoples R China;[4]Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19716 USA

年份：2024

卷号：366

外文期刊名：JOURNAL OF ENVIRONMENTAL MANAGEMENT

收录：;EI(收录号：20240107909);WOS:【SCI-EXPANDED(收录号:WOS:001271621000001)】；

基金：This work was supported by the National Natural Science Foundationr of China (20577010, 20971043) , and the Open Project Program of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, appreciate for the support from the above fund.The Sup-porting Information is upload as the independent file.

语种：英文

外文关键词：Photo-Fenton; Carbon defect; CoMn LDHs; Self-regeneration; Redox couple; SR-AOPs

摘要：The inefficiency of catalysts in sulfate radical-based advanced oxidation processes (SR-AOPs) is primarily attributed to the sluggish circulation of redox couples. Herein, a carbon defects-enriched NBC-C 3 N 5 @CoMn (NCC) was synthesized through a self-assembly approach. The carbon defects within the NCC induce the electron trap effect, thereby facilitating the efficient cycling of redox couples in photo-Fenton-like processes during contaminant degradation. This effect enables the self-regeneration of the NCC catalyst. The reductive redox couples (Co (II) and Mn (II)) are continuously regenerated following the degradation process. Within the NCC, CoMn layered double hydroxides (LDHs) act as primary active sites, promoting the generation of hydroxyl radicals ( center dot OH), sulfate radicals (SO 4 center dot- ) and singlet oxygen ( 1 O 2 ) through continuous electron gain and loss. Additionally, the internal electric field established within the NCC further accelerates electron transfer. Density Functional Theory (DFT) calculations confirm that the carbon defects-enriched NCC exhibits lower adsorption energies and higher electron transfer efficiencies than carbon defect-deficient NCC. This study introduces a novel photocatalyst with self-regenerating capabilities, presenting an innovative approach to regulate redox couples in SR-AOPs for sustainable degradation.