In situ enhanced catalytic degradation behavior of antibiotics by graphite anodes from spent lithium-ion batteries: The unique role of self-doped metals

IF 9.7 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Duanmei Song, Jiadong Yu, Jing Wu, Beikai Zhang, Jinhui Li
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Abstract

The research on recycling secondary resources and addressing emerging pollutants has earned global interest. In this study, we recycled spent graphite (SG) from retired lithium-ion batteries (LIBs) and prepared graphite catalyst (PMG) via pyrolysis and mechanical activation for tetracycline hydrochloride (TC) adsorption. The carbon materials were characterized by various analysis methods, which illustrated SG contained self-doped metals (SDMs) like Cu, Fe, and synthesized PMG had an extensive specific surface area (237.2 m2/g). These unique properties made PMG a highly potential catalyst for aqueous antibiotics contamination. The results showed the rapid degradation of TC (2 min, 98.3%) with 0.5 vol% H2O2 and 250 mg/L TC and high adsorption capacity (495 mg/g) highlighted the exceptional catalytic activity of the PMG, mainly attributed to SDMs. Through studies of the mechanism, we found that TC degradation was driven by generated free radicals and singlet oxygen, with •O2/HO2• radicals playing a dominant role.

Abstract Image

Abstract Image

废锂离子电池石墨阳极原位增强抗生素的催化降解行为:自掺杂金属的独特作用
二次资源循环利用和新兴污染物治理的研究已引起全球关注。本研究以退役锂离子电池(LIBs)的废石墨(SG)为原料,通过热解和机械活化制备了吸附盐酸四环素(TC)的石墨催化剂(PMG)。通过各种分析方法对碳材料进行了表征,结果表明SG含有Cu、Fe等自掺杂金属(SDMs),合成的PMG具有广泛的比表面积(237.2 m2/g)。这些独特的性质使PMG成为水中抗生素污染的极有潜力的催化剂。结果表明,在H2O2浓度为0.5 vol.%、TC浓度为250 mg/L的条件下,PMG对TC的降解速度快(2 min, 98.3%),吸附量高(495 mg/g),这表明PMG具有优异的催化活性,主要归功于SDMs。通过机理研究,我们发现TC的降解是由生成的自由基和单线态氧驱动的,其中•O2-/HO2•自由基起主导作用。
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来源期刊
Journal of Cleaner Production
Journal of Cleaner Production 环境科学-工程:环境
CiteScore
20.40
自引率
9.00%
发文量
4720
审稿时长
111 days
期刊介绍: The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.
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