首页|Preparation of K-doped g-C3N4 composite loaded on magnetic attapulgite and its degradation performance for malachite green
Preparation of K-doped g-C3N4 composite loaded on magnetic attapulgite and its degradation performance for malachite green
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Visible-light-driven photocatalysis is a promising technology for the treatment of dye wastewater. In this work,a novel photocatalyst of K-doped g-C3N4 loaded on magnetic attapulgite (ATP) (Kω-g-C3N4@ATP-Fe3O4) with excellent visible light photocatalytic properties and stability were successfully prepared and characterized. The removal efficiency of Kω-g-C3N4@ATP-Fe3O4 for malachite green (MG) was studied,and the degradation mechanism was analyzed and proposed. It was found that the K5-g-C3N4@ATP-Fe3O4 photocatalyst possessed excellent degradation efficiency of over 98.0％ for the MG dye wastewater under optimal conditions. Moreover,the K5-g-C3N4@ATP-Fe3O4 materials possessed good recyclability with a removal rate over 82％ after 4 cycles. Under visible light condition,the K5-g-C3N4@ATP-Fe3O4 photo-catalyst produce radicals of·OH and·O2-to degrade the MG dyes,which was supported by electron paramagnetic resonance (EPR) and radical trapping experiments. In addition,the LC-MS analysis inter-preted the degradation pathways and intermediates of MG in the solution. The findings in this work indicate that the prepared photocatalytic material has excellent degradation efficiency for MG and can be applied in dye wastewater treatment.
Jiangxi Key Laboratory of Mining&Metallurgy Environmental Pollution Control,Jiangxi University of Science and Technology,Ganzhou 341000,China
Jiangxi Provincial Key Laboratory of Low-Carbon Processing and Utilization of Strategic Metal Mineral Resources,Jiangxi University of Science and Technology,Ganzhou 341000,China
National Natural Science Foundation of Chinathe"Thousand Talents Plan"of Jiangxi Provincekey projects of the Natural Science Foundation of Jiangxi Province
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