文献类型：期刊文献

英文题名：Quantum confinement and defect engineering mediated "two birds with one stone" strategy for Co/Bi self-regeneration and effective photogenerated carrier separation

作者：Bai, He[1];Yang, Yuxiang[1];Huang, Yan[1];Yuan, Hongming[2];Dong, Mengyang[1];Ni, Chaoying[3];Liu, Xiangnong[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]Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19716 USA;[4]Yangzhou Univ, Anal Test Ctr, Yangzhou 225009, Peoples R China

年份：2025

卷号：365

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20250117623508);WOS:【SCI-EXPANDED(收录号:WOS:001421322900001)】；

基金：This work was supported by the National Natural Science Foundation of China (20577010, 20971043) , and the Open Project Program of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University.

语种：英文

外文关键词：CoBiOx; Quantum confinement; Carbon defect; Self-regeneration; Photo-Fenton-like

摘要：Traditional semiconductors face a challenge where photo-generated electrons (e-) mainly accumulate in the bulk, leading to electron-hole recombination and inefficient catalysis. Herein, a novel CoBiOx (CBO) semiconductor quantum dots (QDs) have been synthesized through the in situ partial substitution of Bi atoms in Bi3O4Cl with Co atoms. By embedding CBO into a defect-rich biochar (NBC) framework, the fabricated NBC@CoBiOx (NCBO) exhibited excellent quantum confinement and defect-induced effects, which could mediate "two birds with one stone" strategy that not only facilitates the transitions of bulk-phase electrons to surface electrons, enhancing charge carrier separation, but also promotes the capture of surface electrons by the Co/Bi dual active sites, enabling self-regeneration of metal sites. The presence of Co and Bi active sites synergistically promotes the decomposition of peroxymonosulfate (PMS) into reactive oxygen species (ROS), achieving efficient degradation of Tetrachloroguaiacol (TeCG). Density Functional Theory (DFT) calculations confirm that the NCBO system exhibits superior electron transfer flux and strong affinity for PMS, with the Co sites playing a pivotal role in the decomposition of PMS towards the thermodynamically favorable generation of singlet oxygen (1O2). Simulated application results suggest that the unique self-regenerating feature of the NCBO photo-Fenton-like system holds promising potential in future wastewater treatment.