Effect of Precursors Prepared by Aqueous Solution Method on the Structure and Catalytic Activity of g-C3 N4
Graphite phase carbon nitride was prepared by using melamine modified by sodium chloride as precursor.The effect of different NaCl content on the structure and properties of graphite phase carbon nitride materials prepared by molten salt method was studied.The photocatalytic simulation experiment with methylene blue(MB)as the target pollutant showed that when the addition amount of sodium chloride was 1 g,the calcined product GCN-1 had the best photocatalytic performance,and its first-order degradation rate constant was 0.011 12 min-1,which is about 1.53 times that of the original carbon nitride.This may be due to the change of the crystal structure of the sodium chloride-modified melamine pre-cursor prepared from the aqueous solution,which leads to the enhancement of the crystallin-ity of carbon nitride after calcination,which in turn contributes to the rapid transport of charges and enhances the separation efficiency of photogenerated carriers.Thus,its visible light catalytic performance was enhanced.
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