Novel heterogeneous Fenton catalysts for promoting carbon iron electron transfer by one-step hydrothermal synthesization

Liulong Cheng; Zhuoye Lu; Junjun Liu; Jingyi Liu; Yu Zhao; Zhuobiao Ni; Qingqi Lin; Runliang Zhu; Xiaojuan Chen; Weikun Lin; Rongliang Qiu; Yanping Zhu

doi:10.1016/j.jcis.2023.11.150

Novel heterogeneous Fenton catalysts for promoting carbon iron electron transfer by one-step hydrothermal synthesization

J Colloid Interface Sci. 2024 Feb 15:656:597-608. doi: 10.1016/j.jcis.2023.11.150. Epub 2023 Nov 26.

Authors

Liulong Cheng¹, Zhuoye Lu¹, Junjun Liu¹, Jingyi Liu¹, Yu Zhao¹, Zhuobiao Ni¹, Qingqi Lin¹, Runliang Zhu², Xiaojuan Chen³, Weikun Lin¹, Rongliang Qiu⁴, Yanping Zhu⁵

Affiliations

¹ Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China.
² CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (CAS), Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China.
³ Foshan University, Foshan 528225, China.
⁴ Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China; China School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China. Electronic address: qiurl@scau.edu.cn.
⁵ Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China. Electronic address: zhuyanping@scau.edu.cn.

PMID: 38040500
DOI: 10.1016/j.jcis.2023.11.150

Abstract

Carbon materials play a crucial role in promoting the Fe(III)/Fe(II) redox cycle in heterogeneous Fenton reactions. However, the electron transfer efficiency between carbon and iron is typically low. In this study, we prepared a novel heterogeneous Fenton catalyst, humboldtine/hydrothermal carbon (Hum/HTC), using a one-step hydrothermal method and achieved about 100 % reduction in Fe(III) during synthesis. Moreover, the HTC continuously provided electrons to promote Fe(II) regeneration during the Fenton reaction. Electron paramagnetic resonance (EPR) and quenching experiments showed that Hum/HTC completely oxidized As(III) to As(V) via free radical and non-free radical pathways. Attenuated total reflectance Fourier-transform infrared (ATR-FTIR) and two-dimensional correlation spectroscopy (2D-COS) analyses revealed that monodentate mononuclear (MM) and bidentate binuclear (BB) structures were the dominant bonding methods for As(V) immobilization. 40 %Hum/HTC exhibited a maximum As(III) adsorption capacity of 167 mg/g, which was higher than that of most reported adsorbents. This study provides a novel strategy for the efficient reduction of Fe(III) during catalyst synthesis and demonstrates that HTC can continuously accelerate Fe(II) regeneration in heterogeneous Fenton reactions.

Keywords: As(III) removal; Electron transfer; Fe(III)/Fe(II) redox cycle; Humboldtine; Hydrothermal carbon.