Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 8, Issue 33, Pages 12603-12611Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c04042
Keywords
photoreduction; alpha-Fe2O3; flower-like MoS2; p-n heterostructure; Fe-S bonds
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Funding
- National Natural Science Foundation of China [51808296, 51802160]
- Natural Science Foundation of Jiangsu Province of China [BK20170938]
- 63rd Chinese Postdoctoral Science Foundation [2018 M630487]
- Startup Foundation for Introducing Talent of NUIST [2243141601034, S8113082001]
- College Students' Enterprise and Entrepreneurship Education Program of NUIST [201910300216]
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A p-n heterostructured alpha-Fe2O3/MoS2 composite via Fe-S bonds was developed as a highly efficient CO2 photoreduction catalyst driven by visible light. The alpha-Fe2O3 nanoparticles were embedded between the flower-like MoS2 layers, benefitting for the uniform dispersion of themselves and meanwhile promoting the formation of 1T-MoS2. The construction of p-n heterostructure caused by Fe-S bonds led to the close contact between alpha-Fe2O3 and MoS2, in which alpha-Fe2O3 was capped with few MoS2 layers and enhanced the segregation and transportation of photoinduced electrons and holes. As a result, the 5FM photocatalyst (5 wt % alpha-Fe2O3 loading on MoS2) exhibited an excellent CO2 photoreduction performance, which obtained 121 mu mol.h(-)(1) .g(-1) of CH4 and 41 mu mol.h(-)(1).g(-1) of CH3OH. During the photoreduction process, alpha-Fe2O3 species were the main active cites, confirmed by in situ diffuse reflectance infrared Fourier transform spectroscopy.
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