Photocatalytic degradation of malachite green in dye wastewater by magnetical Fe3O4/Ag3PO4 composite photocatalysts
The magnetically recoverable Fe3O4/Ag3PO4 composite photocatalysts with enhanced photocatalytic activity in visible light irradiation were synthesized by ion exchange method.The as-prepared samples were characterized by powder X-ray diffraction (XRD).Meanwhile,in the present study,we investigated the effect of initial solution concentration,dosage of photocatalysts and initial pH of reaction system on the degradation process using simulating dye wastewater with malachite green.Furthermore,the magnetically recyclability and reusability of Fe3O4/Ag3PO4 composite photocatalysts were also studied.As a result,the as-achieved photocatalysts exhibited high catalytic activity under visible light illumination,and the degradation efficiency of malachite green reached 96％ within 20 min of irradiation (Initial solution concentration =5 mg/L; dosage of composite photocatalyst =200 mg/L; initial solution pH =3.0).The Fe3O4/Ag3PO4 composite photocatalysts could be collected easily from photocatalytic system in a magnetic field,and the degradation efficiency could be maintained at 60％ after 3 cycles.The research indicated the as-prepared composite photocatalysts showed high degradation efficiency towards malachite green and posed excellent reusability.
photocatalysissilver phosphatemagneticalreusabilitymalachite green
国家科技期刊平台
NSTL
万方数据
维普
