Preparation of Fe/S Modified Biochar Cathode and Its Mechanism for Promoting Ceftriaxone Sodium Removal in an Electro-Fenton System

IF 2.6 4区工程技术 Q3 ELECTROCHEMISTRY

Fuel Cells Pub Date : 2024-09-28 DOI:10.1002/fuce.202400127

Yanhui Shi, Liping Niu, Xinyu Deng, Jingjing Wang, Qing Jiang, Hongwei Tang, Xiaoyu Zhou, Shujuan Liu, Jianliang Xue

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引用次数: 0

Abstract

The efficient cathode material helps to improve the removal of antibiotics in the electro-Fenton (EF) system. The simultaneous doping of transition metals and heterogeneous non-metallic elements in biochar electrodes can enhance the performance of EF systems, but the catalytic mechanism for EF needs to be further explored. In this study, novel Fe/S-doped biochar cathodes derived from marine algae (MA) were prepared to investigate the removal rate of ceftriaxone sodium (CS) and the underlying mechanisms. The results indicated that the Fe/S modified MA (Fe/S/MA) biochar cathode showed the highest CS removal rate (71.23%) in the EF system when treating 20 mg/L CS solution containing 8 mg/L Fe²⁺ at pH 4. Scanning electron microscopy and X-ray photoelectron spectroscopy analyses revealed that this cathode provided more iron and sulfur active sites for catalyzing the oxygen reduction reaction to produce H₂O₂, enhanced surface porosity, and improved CS removal rate. Electrochemical tests demonstrated this cathode possessed high electrocatalytic capacity, rapid charge transfer capability, and low electrode resistance. This suggested that it can provide more oxygen reduction reaction sites to promote ∙OH generation and enhance Fe²⁺ regeneration for improving CS removal. This study demonstrates the Fe/S/MA biochar cathode in the EF system shows great potential for the removal of antibiotics.

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来源期刊

Fuel Cells 工程技术-电化学

CiteScore

5.80

自引率

3.60%

发文量

审稿时长

3.7 months

期刊介绍： This journal is only available online from 2011 onwards. Fuel Cells — From Fundamentals to Systems publishes on all aspects of fuel cells, ranging from their molecular basis to their applications in systems such as power plants, road vehicles and power sources in portables. Fuel Cells is a platform for scientific exchange in a diverse interdisciplinary field. All related work in -chemistry- materials science- physics- chemical engineering- electrical engineering- mechanical engineering- is included. Fuel Cells—From Fundamentals to Systems has an International Editorial Board and Editorial Advisory Board, with each Editor being a renowned expert representing a key discipline in the field from either a distinguished academic institution or one of the globally leading companies. Fuel Cells—From Fundamentals to Systems is designed to meet the needs of scientists and engineers who are actively working in the field. Until now, information on materials, stack technology and system approaches has been dispersed over a number of traditional scientific journals dedicated to classical disciplines such as electrochemistry, materials science or power technology. Fuel Cells—From Fundamentals to Systems concentrates on the publication of peer-reviewed original research papers and reviews.