Effect of Palladium Nanoparticles on Photocatalytic Characteristics of N doped Titania Catalyst

摘要

To improve the photocatalytic efficiency of TiO_2 nanotubular catalyst,N doped and Pd decorated titania nanotubes was successfully synthesized via anodizing,hydrazine hydrate treatment and photoreduction of Pd ions.The small Pd nanoparticles were precipitated on TiO_2 nanotubes through photoreduction of Pd ions,and its distribution is relatively homogeneous.From X-ray photoelectron spectrometry(XPS) result,the N 1s spectrum represents two peaks with binding energy at 399.7 and 400.7 eV,which suggests that the nitrogen elements doped by hydrazine hydrate treatment are located in interstitial sites of the TiO_2crystalline structure.For N doped TiO_2 nanotubes with Pd particles,a high photocurrent was detected due to increase of interface charge carrier separation rate.Moreover,N doped and Pd decorated TiO_2nanotubes exhibited much higher dye destruction efficiency and rate constant due to the synergistic effect of the N dopant and the Pd deposition on TiO_2 nanotubes.