文献类型：期刊文献

英文题名：Enhancement effect of oxygen vacancy on photocatalytic CO₂ reduction

作者：Yang, Qiang[1] Wang, Yunyi[4] Tian, Qingwen[1,3] Li, Xiang[1] Pan, Aixiang[1] Zhao, Mengke[1] Zhu, Yawei[1] Wu, Ting[1] Fang, Guigan[1,2]

第一作者：Yang, Qiang

通信作者：Tian, QW[1];Wu, T[1];Fang, GG[1];Fang, GG[2];Tian, QW[3]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Key Lab Biomass Energy & Mat Jiangsu Prov, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210042, Peoples R China;[2]Nanjing Forestry Univ, Nanjing 210037, Peoples R China;[3]Guangxi Univ, Coll Light Ind & Food Engn, Guangxi Key Lab Clean Pulp & Papermaking & Pollut, Nanning 530004, Peoples R China;[4]Qiqihar Univ, Heilongjiang Prov Key Univ Lab Proc Agr Prod, Coll Food & Bioengn, Qiqihar 161006, Peoples R China

年份：2024

卷号：12

期号：12

起止页码：7207-7214

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001173417900001)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 32301682), the National Key Research and Development Program of China (No. 2022YFC2105505), the Foundation of "Jiebangguashuai" Science and Technology Project of Yibin City (No. 2022JB009)", and the Taishan Industrial Experts Programme (No. tscy20200213).

语种：英文

摘要：BiOBr was manufactured with various concentrations of oxygen vacancies via a solvothermal method using various alcohols as reducing agents. The reductive alcohol resulted in the fracture of the Bi-O bond, thus producing oxygen vacancies. The less polar solvent and extension of the hydroxyl carbon chain of the alcohol facilitate the generation of oxygen vacancies. Theoretical calculations and experiments demonstrated that oxygen vacancies could act as trapping sites to improve the separation efficiency of photogenerated carriers, accompanied by a decrease in the band gap energy to increase the absorption capacity for visible light. The enriched electrons in the defect band could generate more "hot electrons" that were transported to CO2 molecules adsorbed onto unsaturated coordination centers, lowering the reaction barrier and promoting the activation of CO(2 )via the surface plasmon resonance effect. The resulting catalyst prepared with ethylene glycol exhibited a remarkable CO yield of 122.38 mu mol g(-1) h(-1), which is nearly 7.2 times over that of the catalyst prepared with pure water. The enhanced photocatalytic performance corresponded to changes in oxygen vacancy concentration. Therefore, the change in the band gap structure arising from the variation in the content of oxygen vacancies is the cause of enhanced photocatalytic CO2 reduction.