TEMPLATE–FREE HYDROTHERMAL SYNTHESIS OF CeVO4 FOR PHOTOCATALYTIC DEGRADATION OF INSECTICIDE DIAZINON

摘要

The nut–like CeVO4 microstructure was successfully synthesized by the template free hydrothermal process without chemicals assistance or calcination step. The effect of synthesis reaction time for photocatalytic activity was compared. The products were characterized by X–ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and Fourier transform infrared spectroscopy (FT–IR). For evaluating photocatalytic activity under UV light irradiation, insecticide diazinon was used as a representative pollutant. The synthesized products were according to tetragonal CeVO4 microstructure. CeVO4 microstructure synthesized at 180 oC for 8 h and showed the highest photodegradation of 78.38% and the highest apparent rate constant of 0.0191 min–1 within 90 min.