Enhanced photo-Fenton degradation of contaminants in a wide pH range via synergistic interaction between 1T and 2H MoS2 and copolymer tea polyphenols/polypyrrole

Yanhua Lei; Jie Wang; Bochen Jiang; Hui Liu; Haifeng Lan; Yuliang Zhang; Guanhui Gao

doi:10.1016/j.jcis.2023.11.176

Enhanced photo-Fenton degradation of contaminants in a wide pH range via synergistic interaction between 1T and 2H MoS₂ and copolymer tea polyphenols/polypyrrole

J Colloid Interface Sci. 2024 Mar 15:658:74-89. doi: 10.1016/j.jcis.2023.11.176. Epub 2023 Nov 29.

Authors

Yanhua Lei¹, Jie Wang², Bochen Jiang³, Hui Liu², Haifeng Lan², Yuliang Zhang², Guanhui Gao⁴

Affiliations

¹ Institute of Marine Materials Science and Engineering, Shanghai Maritime University, Shanghai, China. Electronic address: yhlei@shmtu.edu.cn.
² Institute of Marine Materials Science and Engineering, Shanghai Maritime University, Shanghai, China.
³ Institute of Marine Materials Science and Engineering, Shanghai Maritime University, Shanghai, China; School of Intelligent Manufacturing and Information, Jiangsu Shipping College, Nantong 226000, China.
⁴ Material Science and Nano Engineering Department, Rice University, Houston, TX 77005, USA. Electronic address: gg13@rice.edu.

PMID: 38100978
DOI: 10.1016/j.jcis.2023.11.176

Abstract

In this study, we present the successful development of a unique photo-Fenton catalyst, 1T-2H MoS₂@TP/PPy (MTP), achieved through the coating of a copolymer of tea polyphenol (TP) and polypyrrole (PPy) onto the surface of heterophase molybdenum disulfide (1T-2H MoS₂). This innovative approach involves the integration of hydrothermal synthesis with copolymerization techniques. Our strategy utilizes nanoflower-like 1T-2H MoS₂ as the foundational framework, which is then enveloped in TP and PPy copolymer. This innovative approach involves the integration of hydrothermal synthesis with copolymerization techniques. Our strategy utilizes nanoflower-like 1T-2H MoS₂ as the foundational framework, which is then enveloped in TP and PPy copolymer. This distinctive architecture demonstrates exceptional catalytic performance owing to the hetero-phase entanglement of 1T-2H MoS₂, which provides a diverse array of active sites. The coupled structure of TP and iron (TP-Fe²⁺/Fe³⁺) effectively overcome the limitation associated with the iron source. The incorporation of PPy not only reduces the recombination of photogenerated electron-hole pairs but also enhances the stability of 1T-2H MoS₂. Remarkably, our experiments on the degradation of methylene blue (MB) and tetracycline (TC) degradation demonstrate that TP-Fe²⁺/Fe³⁺ significantly expands the pH applicability range of the MTP composite catalyst. Additionally, we examine several factors, including different catalysts, H₂O₂ addition, variations in light intensity, solution pH, temperature fluctuations, and the role of active species, to comprehensively understand their impact on the photo-Fenton degradation process. In conclusion, MTP composite exhibits robust catalytic stability and demonstrates a broad pH utilization range in the photo-Fenton oxidation process, highlighting its promising potential for a wide range of applications.

Keywords: Copolymers; Iron redox cycling; Photo-Fenton; Photothermal conversion; Tea polyphenols.