Facile synthesis of Z-scheme graphitic-C3N4/Bi2MoO6 nanocomposite for enhanced visible photocatalytic properties

• DOI: 10.1016/j.apsusc.2015.06.183
• Publication Date: 2015-07-11T00:08:28Z
• Authors: Jiali Lv; Kai Dai; Jinfeng Zhang; Lei Geng; Changhao Liang; Qiangchun Liu; Guangping Zhu; Chen Chen
• Keywords: Graphitic carbon nitride; Visible spectrum; Nanomaterials; Carbon nitride; Charge carrier

Abstract The band engineering of visible-light-driven photocatalysts is a promising route for harnessing of effective solar energy to perform high chemical reactions and to treat environmental pollution. In this study, two narrow band gap semiconductor nanomaterials, graphitic carbon nitride (g-C3N4) and Bi2MoO6, were selected and coupled to form series of g-C3N4/Bi2MoO6 photocatalysts. Their structure, light absorption wavelength range, charge transport properties and energy level were investigated. Through perfect manipulation of their composition, enhanced photocatalytic activity of the Z-scheme g-C3N4/Bi2MoO6 photocatalysts with efficient reduction of recombination of photogenerated electrons and holes was achieved. The optimized Z-scheme g-C3N4/Bi2MoO6 photocatalysts with 25 wt%g-C3N4 showed apparent pseudo-first-order rate constant kapp as high as 0.0688 min−1, which was 4.8 times and 8.2 times higher than that of g-C3N4 and Bi2MoO6 photocatalyst, respectively.