Fabrication of Cr2S3-GO-TiO2 composite with high visible-light-driven photocatalytic activity on degradation of organic dyes

Ternary compound photocatalyst (Cr2S3-GO/TiO2 composite) was prepared by combining graphene oxide (GO) and titanium oxide (TiO2) via sol-gel technique. This synthesized composite was characterized by various methods of analysis (XPS, XRD, SEM, EDX, BET, TGA and TEM). The as-synthesized composite exhibited enhanced photocatalytic performance and degradation rate yielded 98.3, 96.6 and 86.3% on methylene blue, rhodamine B and methyl orange, respectively, under the visible light for 120 min. Cr2S3-GO/TiO2 composite achieved the best photocatalytic activity with 0.3 mol of TiO2. This might be due to the collaborative interaction between increased defects of graphene oxide and photocatalytic effect of Cr2S3. Kinetic model data best fitted with pseudo-first-order model with regression coefficient values of R-2 >= 0.96. This provides a good opportunity for increased photocatalytic activity in the treatment of wastewater from organic pollutants.