Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 19, Issue 32, Pages 21862-21868Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cp03995f
Keywords
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Funding
- National Natural Science Foundation of China [21374106]
- Natural Science Foundation of Jiangxi Province, China [20171BAB213011]
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A N and Fe codoped monoclinic BiVO4 (N-Fe-BVO) photocatalyst was prepared via a conventional sol-gel method and was evaluated for the photocatalytic reduction of CO2 with H2O under visible-light irradiation (4400 nm). As revealed by the structural and photoelectric characterization, the doped N and Fe species can enter the lattice of BiVO4 and induce the codopant levels in the forbidden region of BiVO4, which helps in increasing visible-light absorption, suppressing charge recombination and promoting charge migration. Compared to pure or single-doped BiVO4, the N-Fe-BVO photocatalyst exhibited substantially improved visible-light photocatalytic activity for CO2 reduction, with the highest hydrocarbon generation rate of 27 mmol h(-1) g(cat)(-1) and the corresponding quantum efficiency of 1.86% being obtained. The enhanced photocatalytic activity of N-Fe-BVO can be attributed to the synergistic effect of the simultaneous presence of the Fe and N dopants, and the possible photocatalytic mechanism was also proposed based on the characterization results.
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