Direct Z-Scheme Heterojunction of SnS2 /Sulfur-Bridged Covalent Triazine Frameworks for Visible-Light-Driven CO2 Photoreduction

Shien Guo; Peng Yang; Yanfei Zhao; Xiaoxiao Yu; Yunyan Wu; Hongye Zhang; Bo Yu; Buxing Han; Michael W George; Zhimin Liu

doi:10.1002/cssc.202000712

Direct Z-Scheme Heterojunction of SnS₂ /Sulfur-Bridged Covalent Triazine Frameworks for Visible-Light-Driven CO₂ Photoreduction

ChemSusChem. 2020 Dec 7;13(23):6278-6283. doi: 10.1002/cssc.202000712. Epub 2020 May 15.

Authors

Shien Guo^{1

2}, Peng Yang^{1

2}, Yanfei Zhao¹, Xiaoxiao Yu^{1

2}, Yunyan Wu^{1

2}, Hongye Zhang¹, Bo Yu¹, Buxing Han^{1

2

3}, Michael W George^{4

5}, Zhimin Liu^{1

2

3}

Affiliations

¹ Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid, Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.
² University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.
³ Physical Science Laboratory, Huairou National Comprehensive Science Center, Beijing, 101400, P.R. China.
⁴ School of Chemistry, The University of Nottingham, Nottingham, NG7 2RD, UK.
⁵ Department of Chemical and Environmental Engineering, The University of Nottingham Ningbo China, Ningbo, 315100, P.R. China.

PMID: 32291955
DOI: 10.1002/cssc.202000712

Abstract

Solar-driven reduction of CO₂ into renewable carbon forms is considered as an alternative approach to address global warming and the energy crisis but suffers from low efficiency of the photocatalysts. Herein, a direct Z-Scheme SnS₂ /sulfur-bridged covalent triazine frameworks (S-CTFs) photocatalyst (denoted as SnS₂ /S-CTFs) was developed, which could efficiently adsorb CO₂ owing to the CO₂ -philic feature of S-CTFs and promote separation of photoinduced electron-hole pairs. Under visible-light irradiation, SnS₂ /S-CTFs exhibited excellent performance for CO₂ photoreduction, yielding CO and CH₄ with evolution rates of 123.6 and 43.4 μmol g^-1 h^-1 , respectively, much better than the most catalysts reported to date. This inorganic/organic hybrid with direct Z-Scheme structure for visible-light-driven CO₂ photoreduction provides new insights for designing photocatalysts with high efficiency for solar-to-fuel conversion.

Keywords: CO2 reduction; SnS2; Z-Scheme heterojunction; covalent triazine frameworks; photocatalysis.

Abstract

Grants and funding