Nanoarchitectronics for Photocatalytic CO2 Reduction: Unveiling Interfacial Charge Transfer Excitons in the KFeO2–BiVO4 Composite
Year: 2024
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide In this study, a series of KFeO 2 –BiVO 4 nanocomposites with different KFeO 2 contents have been prepared by a simple hydrothermal method and used as photocatalyst in the photocatalytic reduction of CO 2 with H 2 O to methane (CH 4 ) and carbon monoxide (CO) under visible light irradiation. The as-synthesized KFeO 2 –BiVO 4 nanocomposites have been characterized using an X-ray diffractometer (XRD), a scanning electron microscope (SEM), an attenuated total reflection Fourier transform infrared spectrometer (ATR-FTIR), an ultraviolet–visible light spectrometer (UV–vis), and a photoluminescence spectrometer (PL). In the photocatalytic CO 2 reduction experiments, KFeO 2 –BiVO 4 (1:1) exhibited an improvement of photocatalytic activity for the CO 2 photoreduction due to the reduced electron–hole pair recombination and increased BET specific area. When irradiated with a blue light lamp, the cumulative CO yield for KFeO 2 –BiVO 4 (1:1) reached about 54.6 μmol g –1 (the quantum yield was 0.14%) and the cumulative yield of CH 4 was 34.1 (the quantum yield was 0.35%). Based on the experimental results, a plausible photocatalytic reaction mechanism for photoreduction of CO 2 has been proposed in this study. In addition, the charge enhancement photoreduction properties of KFeO 2 –BiVO 4 have been verified by DFT calculations
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
OpenAlex ID: W4405274308