High Photocatalytic Performance of Pd/PdO-Supported BiVO4 Nanoparticles for Rhodamine B Degradation under Visible LED Light Irradiation

摘要

Pd/PdO-decorated BiVO4 nanoparticles were prepared by two- step router: (i) monoclinic scheelite BiVO4 nanoparticles were fabricated via the co-precipitation process in the presence of urea; (ii) Pd/PdO was decorated BiVO4 surface by the combina- tion of by precipitation method and annealing process. The as- synthesized catalysts were characterized by X-ray powder diffraction (XRD) analysis, Raman spectra, X-ray photoelectron (XPS) spectra, UV-visible diffuse reflectance (UV-vis DRS) spectra, and photoluminescence (PL) spectroscopy. The photo- catalytic performance of Pd/PdO-decorated BiVO4 samples exhibited excellent photodegradation of rhodamine B as well as the OH radical generation under LED light irradiation as a comparison with the bare BiVO4. This excellent outcome is due to the reduced electron/hole recombination of Pd/PdO-deco- rated BiVO4 samples, which was confirmed by PL character- ization. Therefore, the fabrication of semiconductors with a combination of noble metal/oxides are good candidates for enhancement of their photocatalytic performance.