Abstract
AbstractA novel VO2/g‐C3N4 Z‐Scheme type heterostructure composite photocatalyst was fabricated by the ultrasonic‐assisted method. The newly synthesized photocatalyst has been systematically and comprehensively characterized and analyzed. Through the selective oxidation of DL‐1‐Phenylethyl alcohol under Vis‐LED irradiation and aerobic oxidation, the photocatalytic performance of VO2/g‐C3N4 photocatalyst was investigated. The results showed that the prepared VO2/g‐C3N4 nanocomposites exhibited excellent photocatalytic oxidation performance. Among them, the highest turnover frequency (TOF) was 0.42 mmol (DL‐1‐Phenylethyl alcohol)⋅mmol−1 (catalyst)⋅h−1, which was 5 times higher than the TOF of the original g‐C3N4. The effects of different wavelengths of LED monochromatic light, the composite ratio of VO2 and g‐C3N4, the reaction time, and the different benzyl alcohol substrates were studied. Also, catalyst life test was completed. Furthermore, a persuasive mechanism of photocatalytic selective oxidation of DL‐1‐Phenylethyl alcohol on VO2/g‐C3N4 photocatalyst was proposed through EPR and radical trapping experiments.
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