Activity and stability of bifunctional perovskite/carbon-based electrodes for the removal of antipyrine by electro-Fenton process

被引：0

作者：

Cruz del Álamo A. ^{[1
]}

Puga A. ^{[2
]}

Pariente M.I. ^{[1
]}

Rosales E. ^{[2
]}

Molina R. ^{[1
]}

Pazos M. ^{[2
]}

Martínez F. ^{[1
]}

Sanromán M.A. ^{[2
]}

机构：

[1] Department of Chemical and Environmental Technology, ESCET, Rey Juan Carlos University, Móstoles, Madrid

[2] Universidad de Vigo, Grupo de Bioingeniería y Procesos Sostenibles, Departamento de Ingeniería Química, CINTECX, Campus Lagoas-Marcosende, Vigo

来源：

Chemosphere | 2023年 / 334卷

关键词：

Antipyrine; Carbon black; Heterogeneous electroFenton; Perovskite; Pharmaceuticals; PTFE;

D O I：

10.1016/j.chemosphere.2023.138858

中图分类号：

学科分类号：

摘要：

Bifunctional perovskite/carbon-black(CB)/polytetrafluoroethylene(PTFE) electrodes for electro-generation and catalytic decomposition of hydrogen peroxide to oxidizing hydroxyl radicals have been fabricated. These electrodes were tested for electroFenton (EF) removal of antipyrine (ANT) as a model antipyretic and analgesic drug. The influence of the binder loading (20 and 40 wt % PTFE) and type of solvent (1,3-dipropanediol and water) was studied for the preparation of CB/PTFE electrodes. The electrode prepared with 20 wt % PTFE and water exhibited a low impedance and remarkable H2O2 electro-generation (about 1 g/L after 240 min, a production rate of ca. 6.5 mg/h·cm2). The incorporation of perovskite on CB/PTFE electrodes was also studied following two different methods: i) direct deposition on the CB/PTFE electrode surface and ii) addition in the own CB/PTFE/water paste used for the fabrication. Physicochemical and electrochemical characterization techniques were used for the electrode's characterization. The dispersion of perovskite particles in the own electrode matrix (method ii) exhibited a higher EF performance than the immobilisation onto the electrode surface (method i). EF experiments at 40 mA/cm2 and pH 7 (non-acidified conditions) showed ANT and TOC removals of 30% and 17%, respectively. The increase of current intensity up to 120 mA/cm2 achieved the complete removal of ANT and 92% of TOC mineralisation in 240 min. The bifunctional electrode also proved high stability and durability after 15 h of operation. © 2023 The Authors

引用

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