过硫酸盐
化学
催化作用
降级(电信)
氧化还原
电子转移
吸附
碳纤维
无机化学
废水
四环素
氮气
核化学
光化学
有机化学
材料科学
废物管理
复合数
工程类
复合材料
电信
生物化学
抗生素
计算机科学
作者
Yue Zhao,Lu Qiao,Mingjuan Zhang,Yao Xiao,Yani Tao,Furong Yang,Qian Lin,Yi Zhang
标识
DOI:10.1016/j.jcis.2024.06.033
摘要
The activation of peroxymonosulfate (PMS) by carbon-based catalysts is deemed to be a promising method for the degradation of refractory organic contaminants in wastewater. Herein, a Cu-doping strategy in B and N co-doped carbon nanotubes with highly dispersed BOCu sites and graphite nitrogen were successfully synthesized for activating PMS to degradate tetracycline. The best removal rate of tetracycline within 60 min (97.63 %) was obtained by the 1.5 % Cu-BNC and the degradation rate was increased by 17.9 times. The enhanced catalyst activity was attributed to the promoting the cycle of the Cu(I)/Cu(II) redox pair by the formed BOCu sites, and the accelerating the electron transfer process by the adsorption of graphitic N for PMS. The non-free radical pathway including 1O2 and electron transfer played a dominant role in the 1.5 % Cu-BNC/PMS system. The degradation intermediates of TC were identified and three possible degradation pathways were proposed. Further toxicity analysis of the intermediates showed that the 1.5 % Cu-BNC/PMS system had a significant effect on weakening and reducing the biological toxicity and mutagenicity of TC. Moreover, it presented an excellent degradation performance in raw natural water. In general, the proposed regulation of carbon-based catalysts via the coordination-driven effect provides ideas for efficient wastewater treatment.
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