Hydrothermal preparation of CuS2-Cu2O decorated TiO2 for highly efficient activation of peroxymonosulfate to degrade chloroquine phosphate

Wang Yuyao; Wang Dawei; Sirapassorn Kiatphuengporn; Paweena Prapainainar; Anusorn Seubsai

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Hydrothermal preparation of CuS₂-Cu₂O decorated TiO₂ for highly efficient activation of peroxymonosulfate to degrade chloroquine phosphate

Updated：2026-09-17

- Hydrothermal preparation of CuS₂-Cu₂O decorated TiO₂ for highly efficient activation of peroxymonosulfate to degrade chloroquine phosphate
- Hydrothermal preparation of CuS₂-Cu₂O decorated TiO₂ for highly efficient activation of peroxymonosulfate to degrade chloroquine phosphate
- 中国化学工程学报（英文） 2026年95卷第7期页码：80-89
- Affiliations：
  
  Thailand Advanced Institute of Science and Technology and Institute of Science Tokyo (TAIST-Science Tokyo), Kasetsart University, Bangkok 10900, Thailand
  College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
  National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand
  Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
- Author bio：
  
  *Corresponding author. E-mail address:fengasn@ku.ac.th(A. Seubsai).
- Funds：
  
  the Kasetsart University Research and Development Institute (KURDI)(FF(KU-SRIU)2.67)
- DOI：
  中图分类号：
- 收稿：2025-10-24，
  
  修回：2026-01-13，
  
  录用：2026-01-16，
  
  网络首发：2026-04-08，
  
  纸质出版：2026-07
- Accepted：
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Wang Yuyao, Wang Dawei, Sirapassorn Kiatphuengporn, 等. Hydrothermal preparation of CuS₂-Cu₂O decorated TiO₂ for highly efficient activation of peroxymonosulfate to degrade chloroquine phosphate[J]. 中国化学工程学报（英文）, 2026,95(7):80-89.

Wang Yuyao, Wang Dawei, Sirapassorn Kiatphuengporn, et al. Hydrothermal preparation of CuS₂-Cu₂O decorated TiO₂ for highly efficient activation of peroxymonosulfate to degrade chloroquine phosphate[J]. Chinese Journal of Chemical Engineering, 2026, 95(7): 80-89.
Wang Yuyao, Wang Dawei, Sirapassorn Kiatphuengporn, 等. Hydrothermal preparation of CuS₂-Cu₂O decorated TiO₂ for highly efficient activation of peroxymonosulfate to degrade chloroquine phosphate[J]. 中国化学工程学报（英文）, 2026,95(7):80-89. DOI：

Wang Yuyao, Wang Dawei, Sirapassorn Kiatphuengporn, et al. Hydrothermal preparation of CuS₂-Cu₂O decorated TiO₂ for highly efficient activation of peroxymonosulfate to degrade chloroquine phosphate[J]. Chinese Journal of Chemical Engineering, 2026, 95(7): 80-89. DOI：

摘要

Abstract

Surface modification of titanium dioxide (TiO

) with transition metals is a feasible solution to enhance its ability to activate peroxymonosulfate (PMS) for environmental remediation. In this study

a novel composite catalyst comprising nano-CuS

and Cu

O decorated anatase-TiO

(CuS

-Cu

O/TiO

) was successfully synthesized

via

a hydrothermal method using thiourea as the sulfur source. The CuS

-Cu

O/TiO

catalyst exhibited excellent performance for the degradation of chloroquine phosphate (CQ) through a photo-assisted PMS activation process

achieving 99% removal efficiency within 10 min under UV irradiation. The effects of PMS dosage and solution pH on CQ degradation were investigated in detail. Mechanism studies

including active species quenching experiments

electron paramagnetic resonance (EPR)

and electrochemical analysis

revealed that the redox cycling of Cu

/Cu

within the CuS

-Cu

O domains and the efficient photo-induced electron transfer derived from TiO

are the key steps in PMS activating. Reactive species

such as photogenerated holes (h+)

hydroxyl radicals (·OH)

and singlet oxygen (

) played essential roles in the oxidative degradation of CQ. Furthermore

liquid chromatography—mass spectrometry (LC—MS) analysis enabled the identification of intermediate products

based on which two plausible degradation pathways of CQ were proposed. This work demonstrates the feasibility of photo-assisted PMS activation for the removal of pharmaceutical pollutants and provides insights into the rational design of TiO

-based composite photocatalysts for wastewater treatment.

关键词

Keywords

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