Activation of peroxymonosulfate over recyclable Co3O4/rice straw lignin-based carbon fiber flexible membrane for the degradation of organic pollutants

Bowei Tang, Zihao Xiong, Tingting Tao, Ya Sun, Deng Ding, Xiaofang Li, Chunlei Wang, Juntao Yan, Ruan Chi, Linbing Sun

科研成果: 期刊稿件文章同行评审

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摘要

Heterogeneous composite catalysts have gained significant attention in recent years due to their cleanliness, high efficiency, and stable performance. However, the difficulty of recovery and high cost have always limited the development of heterogeneous composite catalysts. Herein, flexible lignin-based carbon fiber (LCF) membranes with easy recovery and low cost were prepared by electrospinning and carbonization using rice straw lignin waste and polyacrylonitrile (PAN). Following in-situ sedimentation and annealing treatment, Co3O4 nanoparticles were successfully anchored on the surface of LCF to achieve Co3O4/LCF composite membrane, which was utilized for activating peroxymonosulfate (PMS) with an impressive 83 % degradation efficiency of tetracycline (TC) within 30 min, the mineralization rate of TC reached 67 % within 90 min, and displayed exceptional degradation capabilities even with interfering substances. Based on the quenching experiments, electron paramagnetic resonance (EPR), electrochemical tests and X-ray photoelectron spectroscopy (XPS), both radical and non-radical pathways were involved for TC degradation, and non-radical pathway was identified as the primary route. Active sites such as C[dbnd]O, graphite N, pyridinic N, and the Co2+/Co3+ redox cycle played the crucial roles during the degradation process. Density functional theory (DFT) and high-performance liquid chromatography-mass spectrometry (HPLC-MS) analyses demonstrated the proposal of a plausible degradation pathway for TC.

源语言英语
文章编号137844
期刊International Journal of Biological Macromolecules
283
DOI
出版状态已出版 - 12月 2024

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