Abstract
Here, we report the new ternary composite Bi2O3–G–ZnO using ultrasonic techniques as well as X-ray diffraction (XRD), scanning electron microscopy (SEM), high transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and UV–Visible diffuse-reflectance spectra (DRS) analyses. The prepared photocatalysts were tested for the CO2 photocatalytic reduction in a reactor, and the main detected reaction product is CH3OH. The optimum loading graphene of 8% exhibited the maximum photoactivity, achieving a total CH3OH yield of 7.250 µmol g−1 h−1 after 48 h. This excellent photoreduction activity is due to the positive synergistic relation between the Bi2O3 and the graphene components in our heterogeneous system. The present work provides a novel application regarding the improvement of nanoscale Bi2O3–G–ZnO materials for photocatalytic applications.
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