Abstract
AbstractIn this study, several Pd/MgO/BiVO4 nanocomposites were prepared using the hydrothermal method and their effective photocatalyst activity for the photoreduction of CO2 to CH4 was investigated. The microstructure and photocatalytic behavior of the prepared photocatalysts were studied through X‐ray diffraction, scanning electron microscopy, tunneling electron microscopy, X‐ray photoelectron spectroscopy, ultraviolet–visible spectrophotometry, Fourier‐transform infrared spectroscopy, Brunauer–Emmett–Teller specific surface area, and photoluminescence spectroscopy. CH4 yields of 5.9 and 9.4 μmol g−1 hr−1 were obtained using BiVO4 and 25% MgO/BiVO4 nanocomposites, respectively. The highest production rate of CH4 was measured as 12.8 μmol g−1 hr−1 on overloading 0.3% Pd on 25% MgO/BiVO4. Pd/MgO/BiVO4 exhibited excellent CO2 photoreduction stability with negligible loss after five consecutive cycles. Finally, a possible mechanism of CO2 photoreduction using Pd/MgO/BiVO4 was proposed for understanding the synergistic effects. The results of the experiment revealed that Pd/MgO/BiVO4 can be a promising photocatalyst in solar energy conversion and storage application and can achieve excellent CO2 photoreduction performance.
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