Degradation of carbamazepine by MWCNTs-promoted generation of high-valent iron-oxo species in a mild system with O-bridged iron perfluorophthalocyanine dimers

• 作者: Zhiguo Zhao Moyan Zhou Nan Li Yuyuan Yao Wenxing Chen Wangyang Lu
• 来源期刊: 环境科学学报（英文版）
• 年，卷（期）: 2021,（1）
• 页码范围: 260-266
• 页数: 7页
• 语种: 英文

摘要

Metal phthalocyanine has been extensively studied as a catalyst for degradation of carba-mazepine(CBZ).However,metal phthalocyanine tends to undergo their own dimerization or polymerization,thereby reducing their activity points and affecting their catalytic prop-erties.In this study,a catalytic system consisting of O-bridged iron perfluorophthalocyanine dimers(FePcF16-O-FePcF16),multi-walled carbon nanotubes(MWCNTs)and H2O2 was pro-posed.The results showed MWCNTs loaded with FePcF16-O-FePcF16 can achieve excellent degradation of CBZ with smaller dosages of FePcF16-O-FePcF16 and H2O2,and milder reaction temperatures.In addition,the results of experiments revealed the reaction mechanism of non-hydroxyl radicals.The highly oxidized high-valent iron-oxo(Fe(IV)=O)species was the main reactive species in the FePcF16-O-FePcF16/MWCNTs/H2O2 system.It is noteworthy that MWCNTs can improve the dispersion of FePcF16-O-FePcF16,contributing to the production of highly oxidized Fe(IV)=O.Then,the pathway of CBZ oxidative degradation was specu-lated,and the study results also provide new ideas for metal phthalocyanine-loaded carbon materials to degrade emerging pollutants.