Journal
CHEMCATCHEM
Volume 10, Issue 20, Pages 4578-4585Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201800959
Keywords
CO2 photoreduction; insitu fabrication; heterostructure; g-C3N4; BiFeWOx
Categories
Funding
- Key Project of Chinese National Programs for Research and Development [2016YFC0203800]
- National Natural Science Foundation of China [51408309, 51578288]
- Industry-Academia Cooperation Innovation Fund Projects of Jiangsu Province [BY2016004-09]
- Jiangsu Province Scientific and Technological Achievements into a Special Fund Project [BA2015062, BA2016055, BA2017095]
- Top-notch Academic Programs Project of Jiangsu Higher Education Institutions, Industry-Academia Cooperation Project of Datang Pro-environment [DNEPT_CZ_179_16]
- Priority Academic Program Development of Jiangsu Higher Education Institutions, Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX18 0446]
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A series of g-C3N4/BiFeWOx composites (GN-x/BFW) with double-heterojunction composites as photocatalysts for efficient and stable CO2 photoreduction had been rationally designed and synthesized by the facile insitu hydrothermal method. In situ growing BFW on g-C3N4 sheets achieved that the g-C3N4 was embedded in the inner of BFW as well as wrapped on the surfaces of BFW. The obtained heterojunction composites greatly inhibited the recommendation of photogenerated electron/hole pairs and enhanced the light respond on the visible light due to the tight chemically bonded interface interaction. Benefiting from the unique structure, the optimized GN-5.0%/BFW heterostructure catalyst showed a higher performance of photoreduction CO2 to CO (43molh(-1)g(-1)) than that of pure BFW (5.2molh(-1)g(-1)) and g-C3N4 (8.9molh(-1)g(-1)) under visible light irradiation at 10 degrees C. Besides, the GN-x/BFW composites exhibited outstanding recycling photostability and structural stability. A possible Z-scheme mechanism was proposed according to the staggered band potentials between g-C3N4 and BFW and ESR results. Similarly, this facile synthetic method could be employed to fabricate other composites to accelerate the photocatalytic performance.
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