MXene-based composite aerogels with bifunctional ferrous ions for the efficient degradation of phenol from wastewater

Gaoyuan Li; Weifeng Liu; Shaojun Gao; Huayu Lu; Dongju Fu; Meiling Wang; Xuguang Liu

doi:10.1016/j.chemosphere.2024.142151

MXene-based composite aerogels with bifunctional ferrous ions for the efficient degradation of phenol from wastewater

Chemosphere. 2024 Apr 26:358:142151. doi: 10.1016/j.chemosphere.2024.142151. Online ahead of print.

Authors

Gaoyuan Li¹, Weifeng Liu², Shaojun Gao³, Huayu Lu⁴, Dongju Fu⁵, Meiling Wang⁶, Xuguang Liu⁷

Affiliations

¹ Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China. Electronic address: ligaoyuan918@163.com.
² Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China. Electronic address: lwf061586@yeah.net.
³ Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China. Electronic address: 1398977640@qq.com.
⁴ Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China. Electronic address: 1597631766@qq.com.
⁵ College of New Materials and New Energies, Shenzhen Technology University, Shenzhen, Guangdong, 518118, China. Electronic address: fudongju@sztu.edu.cn.
⁶ Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China. Electronic address: wmlsdym@163.com.
⁷ Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China. Electronic address: liuxuguang@tyut.edu.cn.

PMID: 38679169
DOI: 10.1016/j.chemosphere.2024.142151

Abstract

Herein, MXene-based composite aerogel (MXene-Fe²⁺ aerogel) are constructed by a one-step freeze-drying method, using Ti₃C₂T_x MXene layers as substrate material and ferrous ion (Fe²⁺) as crosslinking agent. With the aid of the Fe²⁺ induced Fenton reaction, the synthesized aerogels are used as the particle electrodes to remove phenol from wastewater with three-dimensional electrode technology. Combined with the dual roles of Fe²⁺ and the highly conductive MXene, the obtained particle electrode possesses extremely effective phenol degradation. The effects of experiment parameters such as Fe²⁺ to MXene ratio, particle electrode dosage, applied voltage, and initial pH of solution on the removal of phenol are discussed. At pH = 2.5, phenol with 50 mg/L of initial concentration can be completely removed within 50 min at 10 V with the particle electrode dosage of 0.56 g/L. Finally, the mechanism of degradation is explored. This work provides an effective way for phenol degradation by MXene-based aerogel, which has great potential for the degradation of other organic pollutants in wastewater.

Keywords: Electro-fenton; MXene-Fe(2+) aerogel; Particle electrode; Phenol degradation; Three-dimensional electrode.