Preparation, characterization and photocatalytic activities of ZnO/TiO_2 nanotube composites

摘要

Highly dispersed ZnO/TiO_2 nanotube composites (NTCs) were successfully synthesized via a facile ethylenediamine-assisted deposition-precipitation route. This NTCs were characterized by XRD, TEM, and photcatalytic testing. The results revealed that hexagonal wurtzite phase ZnO NPs with an average size of about 2 nm were homogeneously dispersed and anchored on the surface of TiO_2 nanotubes (NTs) to form ZnO/TiO_2 NTCs, which exhibited excellent photocatalytic activity for photodegradation of methyl orange (MO) compared with P25 and Pure TiO_2 NTs. Furthermore, ZnO/TiO_2 NTCs possessed very favorable recycle efficiency due to their relatively high sedimentation rate and only slightly decrease of photocatalytic activity after a six- time recycle.