Improvement of Photo-Fenton Activity with the Assistance of Citric Acid on the FeOOH-ZrO2 System for the Degradation of RhB
In this study,FeOOH-ZrO2 catalysts were synthesized by the hydrothermal-precipitation method.The crystal structure of catalysts was analyzed by XRD,and the morphology and composition of the catalysts were characterized by SEM-EDS.With Rhodamine B(RhB)as the target pollutant,the citric acid-assisted FeOOH-ZrO2 system was established to improve the photo-Fenton for eliminating the RhB under visible light irradiation.The effects of process conditions on the RhB degradation were investigated,and the degradation rate of RhB reached 96.69%under the optimal process conditions,where H2O2=1 mM,initial pH=3.0,FeOOH-ZrO2=1 g/L,CA=1 mM.Furthermore,cyclic experiments were conducted,and the degradation rate of RhB remained above 90%after 5 cycles.The mechanism of the citric acid-assisted FeOOH-ZrO2 enhancement of the photo-Fenton system was explored through free radical capture and fluorescence experiments.Both ZrO2 and citric acid were found to promote the degradation of RhB in the reaction system.
NETL
NSTL
万方数据
