Abstract
It is anticipated to remove highly hazardous tetracycline antibiotic from aqueous solution photocatalytically by using Gd doped spinal ferrite. In this work, both ZnFe2O4 and Gd doped ZnFe2O4 photocatalysts were hydrothermally fabricated and characterized by different techniques. The spherical photocatalysts show extended photocatalytic removal efficiency under visible light. The optimized sample (ZnFe1.96Cd0.04O4) removes 78% antibiotic in 80 min. Moreover, under simulated solar light irradiation, the rate of hydrogen produced from water splitting photocatalysis with ZnFe1.96Cd0.04O4 reaches 230.4 μmol/(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 (•O2−) 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.
Published Version
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