文献类型：期刊文献

英文题名：In situ synthesis of mesoporous TiO2 doped with bismuth single atoms for tunable photocatalytic degradation of formaldehyde

作者：Ma, Liang[1];Huang, Changfei[2];Li, Xichen[2];An, Xin[2];Li, Jianping[1];Zou, Lian[2];Zhu, Xiaoxiao[2];Yuan, Cong[2];Dai, Xin[2];Zhou, Yanwen[2];Zhu, Xiang[1];Tian, Chengcheng[2,3]

机构：[1]Sichuan Univ, Coll Carbon Neutral Future Technol, Chengdu 610207, Sichuan, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2025

卷号：354

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20242816684633);WOS:【SCI-EXPANDED(收录号:WOS:001345447200001)】；

基金：This work was finically supported by the National Natural Science Foundation of China (NSFC, Grant No. 52170109) , the Shanghai Science and Technology Innovation Plan (22DZ1208600) , and the Innovation Program of Shanghai Municipal Education Commission (2023ZKZD41) .

语种：英文

外文关键词：Bismuth single atom; Mesoporous TiO2; Photocatalysis; CH2O degradation

摘要：Modification of a photocatalyst with single-atom metals to maximize atomic utilization and suppress charge carrier recombination is an effective strategy to dramatically improve the photocatalytic performance. Here we report the first successful development of the mesoporous TiO2 doped with Bi single-atom catalyst. The resulting single-atom photocatalyst possesses a narrower band gap structure, enhanced conductivity and outstanding photocatalytic activity driven by full spectrum light, which is 20 times higher than that of the commercial TiO2. As evidenced by photo-electrochemical characterizations and density functional theory (DFT) calculations, the Bi single atoms are confirmed to exhibit strong capacity to trap photo-generated electrons and probably act as the active sites in photocatalytic formaldehyde (CH2O) degradation. Additionally, reactive oxygen species (center dot O-2(-), (OH)-O-center dot, and O-1(2)) were identified as key ingredients in promoting CH2O decomposition to CO2 and H2O. This innovative approach provides a promising method for fabricating mesoporous single-atom catalysts with tunable catalytic property.