Modified Heterogeneous Fenton's Reagent Preparation And Light To Help Degradation Of Phenol Study

This paper for preparation Fe₂O₃/γ-Al₂O₃, at the same time, Modified doped adopts the method of Layered immersion for preparation Fe₂O₃-CeO2/γ-Al₂O₃ catalysts, Phenol was used to the study. Compile catalyst of catalytic activity. Introducing the shine to improved reaction system, improve the performance of phenol degradation.This paper adopts the method of impregnation for preparation Fe₂O₃/γ-Al₂O₃,The research was using scanning electron microscope (SEM) and X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) means to analyze sample appearance, structure, elements, optimized the conditions of preparation catalysts. Results show that: Surface has a lot of irregular catalyst particles, the surface on Catalyst Fe/Al atomic ratio was 0.12. Investigation the catalytic under the condition of different preparation Fe₂O₃/γ-Al₂O₃, and the results showed that the performance degradation phenol. Fe(NO3)3 pickling liquid concentration is 0.05 mol/L, roasting temperature for 300℃, roasting time for 2h, Fe₂O₃/γ-Al₂O₃ catalyst reaction after 120min of phenol, degradation of phenol for 83.5% removal.ultraviolet and Fe₂O₃/γ-Al₂O₃ combined to form the homogeneous photo-Fenton reaction system, with its degradation Fenton reaction reagents, and investigation of phenol reaction process parameters. The result shows: the initial concentration of phenol 250mg/L, Fe₂O₃/γ-Al₂O₃ catalyst for 0.4 g, (quality score for 3%) H2O2 solution 4mL, pH=2.66 value, reaction temperature 25℃, for 120min removal of phenol can reach at 92.8%.Using Ce modified Fe₂O₃/γ-Al₂O₃ catalyst, using layered impregnation method Fe₂O₃-CeO2/γ-Al₂O₃ to improve iron dispersion, reduce iron dissolution improve catalyst stability and improve the efficiency of phenol degradation, application scanning electron microscope (SEM) and X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) means of sample appearance, structure, elements and study analyzed test, production process and reaction conditions. The result shows: the Fe₂O₃-CeO2/γ-Al₂O₃ catalyst has compact structure and uniform particles scattered in the degradation of phenol system, after 120min of reaction, phenol removal rate can reach at 93.6%.Light help conditions Fe₂O₃/γ-Al₂O₃ catalyst phenol degradation effects reflects the better catalytic activity, Ce modification of the preparation of Fe₂O₃-CeO2/γ-Al₂O₃ catalyst reactive dissolution below Fe₂O₃/γ-Al₂O₃ catalyst, dissolution rate dropped from 0.52% to 0.22% and phenol remove efficiency improving.