Novel oxygen vacancy-enriched Bi_(2)MoO_(6-x)/MoS_(2)S-scheme heterojunction for strengthening photocatalytic reduction CO_(2)and efficient degradation of levofloxacin hydrochloride:Mechanism,DFT calculations  

作　　者：Hainan Wei Fanming Meng Han Zhang Wenqing Yu Jialong Li Sheng Yao 

机构地区：[1]School of Materials Science and Engineering,Anhui University,Hefei 230601,China

出　　处：《Journal of Materials Science & Technology》2024年第18期107-120,共14页材料科学技术（英文版）

基　　金：supported by the Anhui Provincial Natural Science Foundation of China(No.1508085SME219).

摘　　要：Constructing new photocatalysts for the photocatalytic reduction of CO_(2)and efficient degradation of Lev-ofloxacin is of great importance to renewable energy.Here,S-scheme Bi_(2)MoO_(6-x)/MoS_(2)heterojunction nanospheres containing abundant surface defects(oxygen vacancies)were designed and successfully syn-thesized to enhance CO_(2)photoreduction activity in the absence of other sacrificial agents,co-catalysts or photosensitisers.At the same time,it can efficiently degrade organic pollutants(Levofloxacin).This heterogeneous structure with surface defects provides an abundance of reactive sites,accelerates charge separation and improves oxidation capacity.The improved Bi_(2)MoO_(6-x)/MoS_(2)heterogeneous nanospheres show excellent performance under simulated solar light,with the selectivity and yield of 92.45%and 29.01μmol h^(−1),respectively,for the generation of CO.Under visible light,the degradation efficiency of levofloxacin hydrochloride(LVX)reached 96.3%within 25 min and remained as high as 95%after three cycles.This work provides a new idea for the design of new S-scheme photocatalysts and an important reference for the preparation of photocatalysts for the efficient photocatalytic reduction of CO_(2)and the efficient degradation of organic pollutants at the same time.

关 键 词：Photocatalytic reduction CO_(2) Photodegradation organic pollutants Oxygen vacancies S-scheme heterojunction Bi_(2)MoO_(6-x)/MoS_(2) 

分 类 号：TQ123.6[化学工程—无机化工] O643.36[理学—物理化学] O644.1[理学—化学]