In-situ chemical vapor deposition to fabricate Cuprous oxide/copper sulfide core-shell flowers with boosted and stable wide-spectral region photocatalytic performance

Yunqi Fu; Qi Li; Jianan Liu; Yanqing Jiao; Shan Hu; Hong Wang; Shuo Xu; Baojiang Jiang

doi:10.1016/j.jcis.2020.02.110

In-situ chemical vapor deposition to fabricate Cuprous oxide/copper sulfide core-shell flowers with boosted and stable wide-spectral region photocatalytic performance

J Colloid Interface Sci. 2020 Jun 15:570:143-152. doi: 10.1016/j.jcis.2020.02.110. Epub 2020 Feb 27.

Authors

Yunqi Fu¹, Qi Li¹, Jianan Liu¹, Yanqing Jiao¹, Shan Hu², Hong Wang³, Shuo Xu¹, Baojiang Jiang⁴

Affiliations

¹ Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People' s Republic of China, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China.
² Tianjin Key Laboratory of Composite and Functional Materials, School of Material Science and Engineering, Tianjin University, Tianjin 300072, China.
³ Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People' s Republic of China, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China. Electronic address: rainbowzzj@163.com.
⁴ Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People' s Republic of China, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China. Electronic address: jbj@hlju.edu.cn.

PMID: 32146241
DOI: 10.1016/j.jcis.2020.02.110

Abstract

Cu₂O is widely used in the visible-light photocatalytic field, but its photocatalytic activity and stability still need to be further enhanced. Thus, searching for an efficient method to inhibit photocorrosion of Cu₂O and boost its photogenerated charge carriers' separation is very important and challenging. Herein, Cu₂O@CuS core-shell hexapetalous flowers were synthesized by hydrothermal and in-situ chemical vapor deposition (CVD) strategy. The Cu₂O hexapetalous flowers were firstly obtained through hydrothermal procedure, and then CuS in-situ grew on Cu₂O to form core-shell structure by CVD, which effectively inhibited the photocorrosion of Cu₂O. Meanwhile, Cu₂O@CuS core-shell structure could extend their light absorption ranges from 200 to 1500 nm; promote the separation of electrons and holes in photocatalytic system. Thus, under the wide-spectral region, Cu₂O@CuS exhibited excellent photocatalytic performance for the degradation of tetracycline at 91% with good cycling ability, resulting from the effective separation of photogenerated charges, more free radicals such as OH and O₂^-, increases of utilization rate of visible-light. These results indicate that in-situ CVD strategy is a feasible method to improve visible-light photocatalytic activity and stability of Cu₂O.

Keywords: Chemical vapor deposition; Core-shell; Cuprous oxide/Copper sulfide; Photocatalysis; Wide-spectral Region.