Sodium dodecyl sulfate(SDS) was used to modify CuO/TiO2 to have organic groups on its surface. The crystal, structure, chemical composition, surface groups and photoluminescence properties of catalysts were characterized by XRD, N2 adsorption-desorption, BET、XRF、FTIR 、UV-Vis DRS and three-dimensional fluorescence. The results show that UV-Vis absorption edges have nothing to do with the concentrations of SDS, and the UV-Vis absorption edges reach 830nm. But the N2 adsorption isothermal curves change from Ⅳ type toⅤ after SDS is added. Although the BET surface and total pore volume become the smallest when the concentration of SDS is critical micelle concentration(CMC), the particle size and average pore diameter reach the biggest. The oxygen vacancy concentration and groups of C—C and —CH— also reach the most at CMC. Photocatalysts prepared under this concentration has best catalytic performance.
