聚对苯二甲酸乙二醇酯
光催化
降级(电信)
过氧化氢
催化作用
材料科学
聚乙烯
电子顺磁共振
化学工程
化学
猝灭(荧光)
核化学
废物管理
有机化学
复合材料
荧光
工程类
物理
电信
量子力学
核磁共振
计算机科学
作者
Yang Wan,Huijie Wang,Liu Jie-jing,Jinze Li,Weiqiang Zhou,Jisheng Zhang,Xin Liu,Xianghai Song,Huiqin Wang,Pengwei Huo
标识
DOI:10.1016/j.cej.2023.147781
摘要
Polyethylene terephthalate (PET) plastic, widely used for packaging owing to its excellent properties, has become a major contributor to plastic waste, for which satisfactory recycling and upgrading treatment technologies are lacking. In this study, Co-doped CeO2 was used as a photocatalyst to degrade PET plastics in water, and PET degradation was measured according to the weight loss rate. Peroxymonosulfate (PMS) addition to the photocatalytic system enabled the degradation of 53.82 ± 4.48 % of PET plastics, highlighting the excellent PET plastic degradation capability of the photocatalytic PMS system. The study investigated the effects of the catalyst-to-plastic ratio, PMS concentration, initial pH, inorganic anions, humic acid concentration, and hydrogen peroxide (H2O2) addition on the catalytic oxidation system. Contrast experiments revealed that H2O2 addition to the photocatalysis/PMS oxidation system further improved the PET plastic degradation efficiency (91.61 ± 1.50 %). Liquid product analysis, electron paramagnetic resonance, and free radical quenching experiments confirmed that SO4− played the most significant role in PET degradation. Finally, a possible mechanism for the degradation of PET plastics in water using the photocatalysis/PMS oxidation system was proposed.
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