文献类型：期刊文献

英文题名：One-pot preparation of hierarchical Cu2O hollow spheres for improved visible-light photocatalytic properties

作者：Dong, Yali[1];Tao, Feifei[1,2];Wang, Linxia[1];Lan, Mingxuan[1];Zhang, Jiayan[1];Hong, Tianjie[1]

机构：[1]Shaoxing Univ, Dept Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Chinese Acad Sci, Shanghai Adv Res Inst Lib, Shanghai 201210, Peoples R China

年份：2020

卷号：10

期号：38

起止页码：22387

外文期刊名：RSC ADVANCES

收录：SCI-EXPANDED(收录号：WOS:000544401200014)、、WOS

基金：This work was supported by the National Natural Science Foundation of China (NSFC, grant No. 51372154 and 20901051), Project of Science Technology Department of Zhejiang Province of China (grant No. 2017C33209) and the Science Foundation of Ministry of Housing and Urban-Rural Development of China (grant No. 2015-K4-003).

语种：英文

外文关键词：Azo dyes - Catalyst activity - Copper oxides - Energy gap - Light - Narrow band gap semiconductors - Oxide minerals - Rate constants - Solar energy - Spheres - Wastewater treatment

外文摘要：As visible light photocatalysts, narrow bandgap semiconductors can effectively convert solar energy to chemical energy, exhibiting potential applications in alleviating energy shortage and environmental pollution. Cu2O hollow spheres with a narrow band gap and uniform hierarchical structures have been fabricated in a controlled way. The one-pot solvothermal method without any template is simple and facile. The morphologies, crystal structures, composition, specific surface areas, and optical and photoelectric properties of the products were analyzed by various techniques. The hollow and solid Cu2O spheres could be fabricated by controlling the reaction time, and a possible growth process of the Cu2O hollow spheres was revealed. The degradation of methyl orange (MO) was used to investigate the visible-light catalytic properties of the Cu2O samples. More than 90% of MO is degraded under visible light illumination of 20 min, exhibiting a quick catalytic reaction. The rate constant of the Cu2O hollow spheres was 2.54 times and 46.6 times larger than those of the Cu2O solid spheres and commercial Cu2O powder, respectively. The possible photocatalytic mechanism of MO was revealed over Cu2O hollow spheres through the detection of active species. The as-prepared Cu2O hollow spheres display improved visible-light catalytic activity and stability, indicating their potential application in wastewater treatment.