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- W4205187776 abstract "Discovering highly selective catalysts is key to achieve effective CO2 photoreduction to hydrocarbon fuels. In this work, we construct an ultrathin dimension-matched S-scheme Bi3NbO7/g-C3N4 heterostructure, which permits the highly selective photocatalytic reduction of CO2 to CH4, as shown by 13C isotopic measurements. Density functional theory calculations combined with solid-state characterization confirm the electron transfer from g-C3N4 nanosheets to Bi3NbO7, establishing an internal electric field. The internal electric field drives photogenerated electrons from Bi3NbO7 to g-C3N4, as revealed by in-situ X-ray photoelectron spectroscopy, demonstrating the presence of an S-scheme charge transfer path in Bi3NbO7/g-C3N4 heterostructures allowing efficient and selective CO2 photoreduction. As a result, the optimized sample achieved a CH4 evolution rate of 37.59 μmol·g-1·h-1, a ca. 15-fold enhancement compared to ultrathin g-C3N4 nanosheets, and also retained stability after 10 reaction cycles and 40 h of simulated solar irradiation with no sacrificial reagents. The optimized Bi3NbO7/g-C3N4 composites achieve almost 90% selectivity for CH4 production over CO." @default.
- W4205187776 created "2022-01-25" @default.
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- W4205187776 date "2022-02-01" @default.
- W4205187776 modified "2023-10-16" @default.
- W4205187776 title "Selective CO2 photoreduction to CH4 mediated by dimension-matched 2D/2D Bi3NbO7/g-C3N4 S-scheme heterojunction" @default.
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- W4205187776 doi "https://doi.org/10.1016/s1872-2067(21)63819-6" @default.
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