摘要
It is anticipated to remove highly hazardous tetracycline antibiotic from aqueous solution photocatalytically by using Gd doped spinal ferrite.In this work,both ZnFe_(2)O_(4)and Gd doped ZnFe_(2)O_(4)photocatalysts were hydrothermally fabricated and characterized by different techniques.The spherical photocatalysts show extended photocatalytic removal efficiency under visible light.The optimized sample(ZnFe_(1.96)Cd_(0.04)O_(4))removes 78%antibiotic in 80 min.Moreover,under simulated solar light irradiation,the rate of hydrogen produced from water splitting photocatalysis with ZnFe_(1.96)Cd_(0.04)O_(4)reaches 230.4μmol/(g h).These increased activities are attributed to the increased specific surface area,the expanded light absorption range and the enhanced charge separation realized by doping Gd.According to the charge trapping study,both superoxide(·O_(2)^(-))and hydroxyl radicals(·OH)were the major active species in the process of removing antibiotic.This research provides a feasible way to fabricate low cost photocatalysts for the eradication of highly hazardous pollutants from aqueous solution.
基金
Project supported by the National Natural Science Foundation of China(22268003,52272287)。
