过氧二硫酸盐
催化作用
碳纳米管
纳米复合材料
降级(电信)
化学工程
氧化物
化学
电子转移
纳米颗粒
浸出(土壤学)
水溶液
贵金属
激进的
活性炭
碳纤维
材料科学
纳米技术
光化学
吸附
复合数
有机化学
复合材料
土壤科学
土壤水分
环境科学
工程类
电信
计算机科学
作者
Biming Liu,Wenbin Song,Wenwen Zhang,Xiao Zhang,Shunlong Pan,Haixia Wu,Yongjun Sun,Yanhua Xu
标识
DOI:10.1016/j.seppur.2021.118705
摘要
Confining metal oxide nanoparticles (NPs) in carriers such as carbon nanotubes (CNTs) has become a novel strategy for designing highly efficient and stable non-noble metal chainmail catalysts. In this study, Fe3O4 NPs were confined in the chainmail of multi-walled CNTs to prepare Fe3O4@CNT magnetic nanocomposite with confinement effect, and peroxydisulfate (PDS) was activated to degrade tetracycline (TL) in aqueous solution. Under the conditions of 20 °C, pH0 = 7, 0.5 mM PDS and 0.4 g/L Fe3O4@CNT, TL degradation efficiency of 98.1% could be achieved by radicals (OH, SO4−, O2−) and non-radicals (1O2) generated in the system. Stable carbon-layer structure can protect Fe3O4 NPs inside the chainmail from the influence of reaction environment. TL degradation efficiency still reached 80.2% after five cycles, and the leaching of Fe ions was less than 10 μg/L during each cycle. Electrochemical analysis and density functional theory (DFT) calculations show that electron transfer from active Fe3O4 NPs to the carbon layer to motivate the catalytic activity of carbon surface. This work will provide an innovative path for the application of chainmail catalysts in nano-water environmental remediation.
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