Synthesis of novel g-C_3N_4/Bi_2WO_6 composite with high visible light photocatalytic activity

摘要

The synthesis of g-C_3N_4/Bi_2WO_6 composite materials with varying the g-C_3N_4 content was reported in this investigation. The composite samples were characterized by various techniques. The photocatalytic activity of the g-C_3N_4/Bi_2WO_6 products has been investigated by the degradation of methyl orange dye under visible light irradiation. The UV-vis absorption spectra show that the absorption edge of the composite sample shifts to longer wavelengths with increasing the doping amount of g-C_3N_4. It is revealed that the g-C_3N_4/Bi_2WO_6 composite photocatalysts exhibit remarkably enhanced photocatalytic performance for the degradation of methyl orange. The high visible light photocatalytic activity of g-C_3N_4/Bi_2WO_6 can be attributed to the efficient transfer and separation of charge carriers in the interface between g-C_3N_4 and Bi_2WO_6 particles.