Introducing Sulfur Vacancies and in-plane SnS2/SnO2 Heterojunction in SnS2 Nanosheets to Promote Photocatalytic Activity

Author ORCID Identifier

Chong Zheng:https://orcid.org/0000-0002-3681-305X

Publication Title

Chinese Chemical Letters

ISSN

10018417

E-ISSN

44105

Document Type

Article

Abstract

Due to the relatively sluggish charge carrier separation in metal sulfides, the photocatalytic activity of them is still far lower than expected. Herein, sulfur vacancies and in-plane SnS2/SnO2 heterojunction were successfully introduced into the SnS2 nanosheets through high energy ball-milling. These defective structures were studied by the electron paramagnetic resonance, Raman spectra, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscope analyses. The sulfur vacancies and in-plane heterojunctions strongly accelerate the separation of photoexcited electron-hole pairs, as confirmed by the photoluminescence emission spectra and time-resolved photoluminescence decay spectra. The introduction of sulfur vacancies and in-plane heterojunction in SnS2 nanosheets results in roughly six times higher photodegrading rate for methyl orange and four times higher photocatalytic reduction rate of Cr6+ than those of pure SnS2 nanosheets.

First Page

2809

Last Page

2813

Publication Date

10-1-2020

DOI

10.1016/j.cclet.2020.07.052

Keywords

Ball-milling, Charge carrier separation, In-plane heterojunction, SnS Nanosheets 2, Sulfur vacancies

Department

Department of Chemistry and Biochemistry

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