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：Qiu, Hong;邱红

机构：[1] Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China; [2] College of Applied Science and Technology, Beijing Union University, Beijing, 100012, China; [3] BGRIMM MTC Technology Co., Ltd., Beijing, 102680, China

第一机构：Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China

通讯机构：[1]Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, 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：EI(收录号：20233514638419);Scopus(收录号：2-s2.0-85168758047)

语种：英文

外文关键词：Aromatic compounds - Azo dyes - Bismuth - Bismuth compounds - Doping (additives) - Efficiency - Electrochemical impedance spectroscopy - Metal ions - Orbits - Organic pollutants - Photocatalytic activity - Photodegradation - Rare earths - Specific surface area - X ray photoelectron spectroscopy - Yttrium

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. ? 2023, University of Science and Technology Beijing.