Photocatalytic degradation of methylene blue by C/g-C3N4 composites formed by different carbon sources

Two kinds of nonionic surfactants containing hydroxyl PVA and F127 were introduced into dicyandiamide as carbon sources to form precursors connected by hydrogen bonds. The effects of precursors formed by different carbon sources on the structure and properties of porous C-PVA/g-C3N4 and C-F127/g-C3N4 composite photocatalyst were studied. The results showed that the interaction between PVA, F127 and dicyandiamide can induce the formation of carbon composite and porous structure of target catalyst, and the stronger interaction between F127 and dicyandiamide leads to the formation of more carbon composite and more pore structure in the obtainedC(F127)/g-C3N4 structure. Thus, photocatalytic activity reached 7.84 times that of the pure g-C3N4.