Abstract
Efficient heterogeneous photocatalysis requires photocatalysts to possess high photocatalytic activity, good cycle stability and easy recyclability. In this paper, a g-C3N4 thin film has been successfully prepared utilizing a simple in-situ vapor deposition method using melamine and glass slide as the raw material and substrate, respectively. It was found that the g-C3N4 thin film could easily be separated from the glass slide in cold water and that cyano groups exist in its structure. The as-prepared g-C3N4 thin film can be used as a photocatalyst for the degradation of rhodamine B (RhB) dye. Upon visible light irradiation for 80 min, the degradation rate of RhB could reach 85.9%. After five cycles, the degradation rate could still reach 80.2%. The superior photocatalytic performance was ascribed to the existence of cyano groups, which can improve the charge separation efficiency. It is worth noting that g-C3N4 thin film can be easily separated from the solution using a net and still maintain its structural integrity after the degradation experiment.
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