SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2024, Vol. 71 ›› Issue (7): 110-121.DOI: 10.1016/j.cjche.2024.02.013

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Preparation of Kω-g-C3N4 composite loaded on magnetic attapulgite and its degradation performance for malachite green

Aishun Ma1,2, Hanlin Qian2, Hongxia Liu1, Sili Ren1,2   

  1. 1. Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Jiangxi University of Science and Technology, Ganzhou 341000, China;
    2. Jiangxi Provincial Key Laboratory of Low-Carbon Processing and Utilization of Strategic Metal Mineral Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China
  • Received:2023-09-07 Revised:2024-02-22 Online:2024-08-30 Published:2024-07-28
  • Contact: Sili Ren,E-mail:sili_ren@163.com
  • Supported by:
    This study was funded by the National Natural Science Foundation of China (22078138), the “Thousand Talents Plan” of Jiangxi Province (Jxsq2018101018), and key projects of the Natural Science Foundation of Jiangxi Province (20202ACBL203009).

Preparation of Kω-g-C3N4 composite loaded on magnetic attapulgite and its degradation performance for malachite green

Aishun Ma1,2, Hanlin Qian2, Hongxia Liu1, Sili Ren1,2   

  1. 1. Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Jiangxi University of Science and Technology, Ganzhou 341000, China;
    2. Jiangxi Provincial Key Laboratory of Low-Carbon Processing and Utilization of Strategic Metal Mineral Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China
  • 通讯作者: Sili Ren,E-mail:sili_ren@163.com
  • 基金资助:
    This study was funded by the National Natural Science Foundation of China (22078138), the “Thousand Talents Plan” of Jiangxi Province (Jxsq2018101018), and key projects of the Natural Science Foundation of Jiangxi Province (20202ACBL203009).

Abstract: Visible-light-driven photocatalysis is a promising technology for the treatment of dye wastewater. In this work, a novel photocatalyst of Kω-g-C3N4 loaded on magnetic attapulgite (ATP) (K-g-C3N4@ATP-Fe3O4) with excellent visible light photocatalytic properties and stability were successfully prepared and characterized. The removal efficiency of K-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 photocatalyst 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 interpreted 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.

Key words: Photocatalyst, Malachite green, Kω-g-C3N4, Degradation

摘要: Visible-light-driven photocatalysis is a promising technology for the treatment of dye wastewater. In this work, a novel photocatalyst of Kω-g-C3N4 loaded on magnetic attapulgite (ATP) (K-g-C3N4@ATP-Fe3O4) with excellent visible light photocatalytic properties and stability were successfully prepared and characterized. The removal efficiency of K-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 photocatalyst 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 interpreted 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.

关键词: Photocatalyst, Malachite green, Kω-g-C3N4, Degradation