文献类型：期刊文献

英文题名：Preparation of Y³⁺-doped Bi₂MoO₆ nanosheets for improved visible-light photocatalytic activity: Increased specific surface area, oxygen vacancy formation and efficient carrier separation

作者：Qiu, Hong[1,2];Liu, Shujing[3];Ma, Xiaohui[1];Li, Yajie[1];Fan, Yueyan[1];Li, Wenjun[1];Zhou, Hualei[1]

第一作者：邱红;Qiu, Hong

通讯作者：Zhou, HL[1]

机构：[1]Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Dept Chem & Chem Engn, Beijing 100083, Peoples R China;[2]Beijing Union Univ, Coll Appl Sci & Technol, Beijing 100012, Peoples R China;[3]BGRIMM MTC Technol Co Ltd, Beijing 102680, Peoples R China

第一机构：Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Dept Chem & Chem Engn, Beijing 100083, Peoples R China

通讯机构：[1]corresponding author), Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Dept Chem & Chem Engn, Beijing 100083, Peoples R China.

年份：2023

卷号：30

期号：9

起止页码：1824-1834

外文期刊名：INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001054759000017)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. 21271022).

语种：英文

外文关键词：photocatalysts; dye sensitization; bismuth molybdate; yttrium-doped

摘要：Although Bi2MoO6 (BMO) has recently received extensive attention, its visible-light photocatalytic activity remains poor due to its limited photoresponse range and low charge separation efficiency. In this work, a series of visible-light-driven Y3+-doped BMO (Y-BMO) photocatalysts were synthesized via a hydrothermal method. Degradation experiments on Rhodamine B and Congo red organic pollutants revealed that the optimal degradation rates of Y-BMO were 4.3 and 5.3 times those of pure BMO, respectively. The degradation efficiency of Y-BMO did not significantly decrease after four cycle experiments. As a result of Y3+ doping, the crystal structure of BMO changed from a thick layer structure to a thin flower-like structure with an increased specific surface area. X-ray photoelectron spectroscopy showed the presence of high-intensity peaks for the O 1s orbital at 531.01 and 530.06 eV, confirming the formation of oxygen vacancies in Y-BMO. Photoluminescence (PL) and electrochemical impedance spectroscopy measurements revealed that the PL intensity and interface resistances of composites decreased significantly, indicating reduced electron-hole pair recombination. This work provides an effective way to prepare high-efficiency Bi-based photocatalysts by doping rare earth metal ions for improved photocatalytic performance.