Citation: Hu Keyan, Chen Ming, Liu Yiting, Zheng Chong, Zhang Shaoning, Wang Dong, Zhao Wei, Huang Fuqiang. Introducing sulfur vacancies and in-plane SnS₂/SnO₂ heterojunction in SnS₂ nanosheets to promote photocatalytic activity[J]. Chinese Chemical Letters, ;2020, 31(10): 2809-2813. doi: 10.1016/j.cclet.2020.07.052 shu

Introducing sulfur vacancies and in-plane SnS₂/SnO₂ heterojunction in SnS₂ nanosheets to promote photocatalytic activity

Hu Keyan ^a,b,1 ,
Chen Ming ^a,1 ,
Liu Yiting ^c ,
Zheng Chong ^d ,
Zhang Shaoning ^a ,
Wang Dong ^a ,
Zhao Wei ^a ,
Huang Fuqiang ^a,e,*,

a.
State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
b.
School of Mechanical and Electrical Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, China
c.
State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
d.
Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115, United States
e.
Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

huangfq@mail.sic.ac.cn

Received Date: 2 June 2020
Revised Date: 1 July 2020
Accepted Date: 30 July 2020
Available Online: 1 August 2020

Figures(5)

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.
- Sulfur vacancies,
- In-plane heterojunction,
- SnS₂ Nanosheets,
- Ball-milling,
- Charge carrier separation
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Introducing sulfur vacancies and in-plane SnS2/SnO2 heterojunction in SnS2 nanosheets to promote photocatalytic activity

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通讯作者: 陈斌, bchen63@163.com

Introducing sulfur vacancies and in-plane SnS₂/SnO₂ heterojunction in SnS₂ nanosheets to promote photocatalytic activity