Excellent visible light photocatalytic properties of novel graphene based CdLa2S4/TiO2heterojunction nanocomposite

This paper introduced one pot method for the synthesis of hybrid CdLa2S4-graphene/TiO2 nanocomposite. The surface properties seen by SEM present a characterization of the texture on CdLa2S4-graphene/TiO2 composites and showed a homogenous composition in the particles. The EDX spectra for the elemental identification showed the presence of C, O and Ti with strong Cd, La and S peaks for the CdLa2S4-graphene/TiO2 nanocomposite. The generation of reactive oxygen species were detected through the oxidation reaction from 1,5-diphenyl carbazide (DPCI) to 1,5-diphenyl carbazone (DPCO). It is found that the photocurrent density and the photocatalytic effect increase in the case with the modified CdLa2S4.From the photocatalytic results, the excellent activity of CdLa2S4-graphene/TiO2 nanocompositefor degradation of methylene blue (MB) and Texbrite BA-L (TBA) undervisible irradiation could be attributed to both the effects between photocatalysis of the supported TiO2 and charge transfer of the grapheme nanosheet, and the introduction of CdLa2S4 to enhance the photogenerated electrons.