Abstract
Abstract The Cu 2O/SiC photocatalyst was obtained from SiC nanoparticles (NPs) modified by Cu 2O. Their photocatalytic activities for reducing CO 2 to CH 3OH under visible light irradiation have been investigated. The results indicated that besides a small quantity of 6H-SiC, SiC NPs mainly consisted of 3C-SiC. The band gaps of SiC and Cu 2O were estimated to be about 1.95 and 2.23 eV from UV-Vis spectra, respectively. The Cu 2O modification can enhance the photocatalytic performance of SiC NPs, and the largest yields of methanol on SiC, Cu 2O and Cu 2O/SiC photocatalysts under visible light irradiation were 153, 104 and 191 μmol/g, respectively.
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