CdS/TiO2 composites in different ratios were prepared by simple two-step sol-gel way.
CdS/TiO2 composites are in a mesoporous structure with uniformly dispersed particles.
Compared with pure TiO2, 2%CdS/TiO2 shows the optimum photocatalysis methyl orange.
The charge transfer mechanism on CdS/TiO2 composites was discussed.
Photocurrent tests reveal the optimum photoelectrochemical properties of 2%CdS/TiO2.