双金属片
化学
单线态氧
催化作用
电子顺磁共振
金属有机骨架
钴
降级(电信)
激进的
多相催化
线性扫描伏安法
无机化学
光化学
电子转移
羟基自由基
猝灭(荧光)
过硫酸盐
核化学
氧气
循环伏安法
有机化学
荧光
吸附
物理化学
电信
物理
电极
核磁共振
量子力学
计算机科学
电化学
作者
Qianyuan Mo,Haoyuan Zheng,Guishang Sheng
标识
DOI:10.1016/j.mcat.2023.113817
摘要
In the study presented in this paper, a cobalt and copper codoped bimetallic metal-organic framework (CoCu–MOF) was synthesized by a solvothermal method. The CoCu–MOF was then utilized to activate peroxymonosulfate (PMS) to degrade the tetracycline (TC) present in water. When the concentration of organic pollutants was 20 mg/L, the degradation efficiency of TC by the Co1Cu1–MOF/PMS system reached 98.17 % within 30 min, which was better than that of the PMS and Cu-MOF/PMS systems alone. The effects of catalyst addition, PMS usage, initial pH, temperature, coexisting ions and initial TC concentration on the degradation of TC by Co1Cu1–MOF were investigated. The sulfate radical (SO4•−), hydroxyl radical (•OH), superoxide radical (O2•−), and nonradical singlet oxygen (1O2) were identified as the primary reactive species through quenching experiments and electron paramagnetic resonance (EPR) analyses. Moreover, linear sweep voltammetry (LSV) analysis was used to determine the occurrence of an electron transfer-mediated nonradical pathway in the reaction system in addition to 1O2. The concentrations of the TC intermediates were determined using liquid chromatography‒mass spectrometry (LC‒MS), and potential degradation processes were proposed. This study showed that CoCu–MOF is a heterogeneous catalyst that activates PMS for efficient TC degradation.
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