Journal
CHEMICAL ENGINEERING JOURNAL
Volume 436, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.132051
Keywords
FeV2O4; g-C3N4; Z-scheme; photoreduction CO2; Energy conversion
Categories
Funding
- Department of Science and Techniques of Guangdong Province [2019B010933001, 2021A1515010180]
- Guangzhou Municipal Science and Technology Bureau [202102010449]
- Department of Guangdong Provincial Public Security [GZQC20-PZ11-FD084]
- National Natural Science Foundation of China [21974031]
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In this study, a Z-scheme catalyst was designed and prepared by encapsulating spinel oxides, which significantly reduced the recombination probability of photoexcited carriers and provided adsorptive and reactive sites for CO2 molecules, demonstrating good photocatalytic activity and selectivity.
Spinel oxides have attracted much attention as an excellent light-absorbing material, but they exist fatal problems such as complicated synthesis method and poor carrier separation ability. Herein, a Z-scheme FeV2O4/gC(3)N(4) catalyst was designed and prepared via a one-pot hydrothermal ion-exchange method combined with posttreatment encapsulating process without any templates. The graphite phase carbon nitride encapsulated spinel to construct Z-scheme essence not only significantly lessens the recombination probability of photoexcited carriers, but also provides sufficient adsorptive and reactive sites for CO2 molecules. It also revealed that the resultant composite catalyst exhibited good photocatalytic activity and selectivity with positive inhibition of HER. In this regard, a profound insight is provided to construct high efficiency photocatalyst, which are expected to substitute precious metal catalysts and make progressive contributions for solving CO2 emissions.
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