Abstract

CdS-g-C3N4/C was prepared with g-C3N4, CdS and hollyhock stem as the starting materials via biotemplate method. The results showed that the hollyhock stem carbon maintains a rigid skeleton to give substrate support and good electron transfer channel, while the g-C3N4 lamellae was anchored on the stem surface uniformly with fracture of the 3-s-triazine ring without agglomeration to contribute higher specific surface area and numerous reactive sites. The clear interface between CdS and g-C3N4 phases was established successfully to endow the composite good reaction activity. The special microscopic morphology mentioned above give the composite higher photocatalytic efficiency for RhB of 86.96%, which is 3.23 times that of pure g-C3N4. In the photocatalytic process, the main photocatalytic reactive substance is ·O2−, followed by h+.

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