The enhanced photocatalytic activity of CdS/TiO2 nanocomposites by controlling CdS dispersion on TiO2 nanotubes

► CdS/TiO2 catalysts were prepared via a simple wet chemical method. ► The prepared CdS/TiO2 catalysts possess high visible light photocatalytic activity. ► The photocatalytic activity depends on the dispersion of CdS nanoparticles.