钴四羧基酞菁锰八面沸石（OMS-2）作为过一硫酸盐的非均相催化剂用于降解双氯芬酸。
Cobalt tetracarboxyl phthalocyanine-manganese octahedral molecular sieve (OMS-2) as a heterogeneous catalyst of peroxymonosulfate for degradation of diclofenac.
机构信息
Shanghai Institute of Pollution Control and Ecological Security, Key Laboratory of Yangtze River Water Environment Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Shanghai Institute of Pollution Control and Ecological Security, Key Laboratory of Yangtze River Water Environment Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
出版信息
Chemosphere. 2019 Mar;219:756-765. doi: 10.1016/j.chemosphere.2018.12.030. Epub 2018 Dec 5.
A composite of cobalt tetracarboxyl phthalocyanine and amino-functionalized manganese octahedral molecular sieve (CNOMS-2) was synthesized in a simple way, and applied for degrading diclofenac in aqueous media by catalyzing of peroxymonosulfate heterogeneously. The experiment results revealed that the CNOMS-2/PMS system was highly efficient for DCF degradation in the pH range of 5-9, and the mechanism involved the generation of OH, SO⁻ and O by the activation of PMS. The main reactive oxygen species was found to be O by radical scavenging experiments and electron paramagnetic resonance (EPR) spectroscopy. Further, a carboxylation product of DCF at m/z 340 was found to be a prominent intermediate of the reaction in this system specially, as determined by LC-MS/MS. The reusability and ion leaching concentrations under different pH were also examined to determine the application prospects of the catalyst.
一种钴四羧基酞菁和氨基功能化八面体锰分子筛（CNOMS-2）的复合材料被简单地合成，并通过过一硫酸盐非均相催化用于降解水介质中的双氯芬酸。实验结果表明，在 pH 值为 5-9 的范围内，CNOMS-2/PMS 体系对 DCF 的降解非常有效，该机制涉及通过过一硫酸盐的活化生成 OH、SO⁻和 O。通过自由基清除实验和电子顺磁共振（EPR）光谱发现，主要的活性氧物种是 O。此外，通过 LC-MS/MS 特别确定，在该体系中，反应的一个显著中间产物是 DCF 的羧化产物，m/z 为 340。还研究了不同 pH 值下的可重复使用性和离子浸出浓度，以确定催化剂的应用前景。
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