Abstract
The visible light active g-C3N4/BiVO4 catalysts were synthesized via facile ultrasonic dispersion and calcination methods and used in the study for photocatalytic oxidation (PCO) of NO in gas phase. The as-synthesized samples were analyzed by various characterization techniques. The results exhibited that an interaction between BiVO4 and g-C3N4 was confirmed and a heterojunction was formed on the surface of g-C3N4/BiVO4 composite, which enhanced the separation and transfer of photogenerated electron–hole pairs. The mechanism on the heterojunction effect to improve the PCO ability was also proposed. The activity test showed that the optimum content of g-C3N4 was 50wt%. And the maximum conversion of NO was four times larger than that of the pure components when the inlet concentration of NO was about 400ppm under the visible light (VL) irradiation. The ion chromatography (IC) showed that NO was removed in the oxidation formation of NO2− and NO3−.
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