Abstract
Porous and “brick-like” NiFe 2O 4 nanoparticles were synthesized by a modified chemical co-precipitation route with calcination temperatures of 773 K, 873 K and 973 K, respectively. The Ag/NiFe 2O 4 catalyst was prepared based on the porous NiFe 2O 4 by the incipient wetness impregnation strategy, which showed excellent photoelectric property and catalytic activity. The structural properties of these samples were systematically investigated by X-ray powder diffraction (XRD), scanning electronic microscopy (SEM), energy-dispersive X-ray spectra (EDX), UV–vis diffuse reflectance spectroscopy (DRS), and Fourier transform infrared spectroscopy (FT-IR) techniques. The photo-induced charge separation in the samples was demonstrated by surface photovoltage (SPV) measurement. The photocatalytic degradation of toluene by the Ag/NiFe 2O 4 and NiFe 2O 4 samples was comparatively studied under xenon lamp irradiation. The results indicate that the Ag/NiFe 2O 4 sample calcined at 773 K exhibited the highest efficiency for the degradation of toluene.
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