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Metal-organic framework-derived CuCo/carbon as an efficient magnetic heterogeneous catalyst for persulfate activation and ciprofloxacin degradation
Journal of Hazardous Materials ( IF 13.6 ) Pub Date : 2021-09-17 , DOI: 10.1016/j.jhazmat.2021.127196
Ming-Ming Chen 1 , Huai-Yuan Niu 2 , Cheng-Gang Niu 1 , Hai Guo 1 , Song Liang 1 , Ya-Ya Yang 1
Affiliation  

Herein, the authors synthesis an efficient and easily recycled CuCo/C catalyst through one-step carbonization of Cu@Co-MOF-71 (Abbreviated as Cu@Co-MOF in this work) precursor. The prepared CuCo/C has a high degradation efficiency of 90% for ciprofloxacin (CIP) by activating PMS in a wide value of pH 3–9 within 30 min. After pyrolysis, the carbon matrix as a dispersant can promote the highly uniform distribution of active metals. Additionally, the CIP removal efficiency was 85% after four cycles and the catalyst was easily separated from the solution by using magnets, showing the good stability and reusability. To further study the superiority of CuCo/C activated PMS in degrading CIP, the factors such as pH, the dosage of PMS and catalyst, temperature, inorganic ions and pollutant (CIP) concentration were investigated. Furthermore, the Liquid chromatography-mass spectrometry (LC-MS) was utilized to analyze the intermediate products and possible degradation pathways of CIP. Typically, the quenching experiments and electron paramagnetic resonance (EPR) technology were investigated to confirm the main reaction species including SO4▪−, OH▪ and O2▪− radicals as well as nonradical (1O2). This work put forward a simple method for synthesis of metal-organic framework (MOF) derived catalysts and its application in treatment of organic pollutants.



中文翻译:

金属有机骨架衍生的 CuCo/碳作为高效的磁性非均相催化剂用于过硫酸盐活化和环丙沙星降解

在此,作者通过对Cu@Co-MOF-71(本工作中简称为Cu@Co-MOF)前驱体的一步碳化合成了一种高效且易于回收的CuCo/C催化剂。通过在 30 分钟内激活 PMS 在 pH 3-9 的宽值范围内,制备的 CuCo/C 对环丙沙星 (CIP) 具有 90% 的高降解效率。热解后,碳基体作为分散剂可以促进活性金属的高度均匀分布。此外,四次循环后的CIP去除效率为85%,并且使用磁铁很容易将催化剂从溶液中分离出来,表现出良好的稳定性和可重复使用性。为进一步研究CuCo/C活化PMS降解CIP的优越性,考察了pH、PMS和催化剂用量、温度、无机离子和污染物(CIP)浓度等因素。此外,液相色谱-质谱(LC-MS)用于分析CIP的中间产物和可能的降解途径。通常,研究淬火实验和电子顺磁共振 (EPR) 技术以确认主要反应物种包括 SO4 ▪-、OH▪ 和O 2 ▪-自由基以及非自由基( 1 O 2 )。本工作提出了一种简单的金属有机骨架(MOF)衍生催化剂的合成方法及其在有机污染物处理中的应用。

更新日期:2021-10-01
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