CdSe nanorod/TiO₂ nanoparticle heterojunctions with enhanced solar- and visible-light photocatalytic activity.

ABSTRACT: CdSe nanorods (NRs) with an average length of ≈120 nm were prepared by a solvothermal process and associated to TiO₂ nanoparticles (Aeroxide^® P25) by annealing at 300 °C for 1 h. The content of CdSe NRs in CdSe/TiO₂ composites was varied from 0.5 to 5 wt %. The CdSe/TiO₂ heterostructured materials were characterized by XRD, TEM, SEM, XPS, UV-visible spectroscopy and Raman spectroscopy. TEM images and XRD patterns show that CdSe NRs with wurtzite structure are associated to TiO₂ particles. The UV-visible spectra demonstrate that the narrow bandgap of CdSe NRs serves to increase the photoresponse of CdSe/TiO₂ composites until ≈725 nm. The CdSe (2 wt %)/TiO₂ composite exhibits the highest photocatalytic activity for

SUBMITTER: Laatar F 

PROVIDER: S-EPMC5753051 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature