Bi2Se3/CdS/TiO2 hybrid photoelectrode and its band-edge levels

► CVD synthesis of Bi2Se3 nanoparticles. ► Bi2Se3 and CdS co-sensitized TiO2 nanorod arrays electrode was assembled by CVD. ► Direct physical contact heterojunctions were formed at the interfaces of electrode. ► Cascade structure of band-edge levels was formed in Bi2Se3/CdS/TiO2 electrode.