Lattice distortion effects in high-entropy oxides: Boosting PMS activation for effective and durable pollutant degradation

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Type
Article
Citation
Guan, Y., Zhou, G., Jiang, Y., Dong, J., Li, L., Yin, J., Huang, S., Zhang, L., & Ang, E. H. (2025). Lattice distortion effects in high-entropy oxides: Boosting PMS activation for effective and durable pollutant degradation. Separation and Purification Technology, 358(Part A), Article 130267. https://doi.org/10.1016/j.seppur.2024.130267
Author
Guan,Yu
•
Zhou, Guolang
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Jiang, Yexin
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Dong, Junyuan
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Li, Lin
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Yin, Jingzhou
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Huang, Suyun
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Zhang, Lili
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Ang, Edison Huixiang 
Abstract
Advanced Oxidation Processes (AOPs) are highly effective for pollutant removal, but achieving an optimal combination of high reactivity, corrosion resistance, and long-term stability remains challenging. In this study, the synthesis of a distinctive hollow prismatic high-entropy oxide, (Co0.2Ni0.2Mn0.2Cu0.2Zn0.2)3O4, derived from complex coordination polymers are presented. This high-entropy oxide exhibits significant lattice distortion effects compared to conventional (Co1/3Ni1/3Mn1/3)3O4 and Co3O4. These distortions reduce the metal-O bond length, which enhances cyclic stability during peroxymonosulfate (PMS) activation for pollutant degradation. Additionally, the improved interaction between the catalyst and PMS enhances the generation of reactive oxygen species (ROS), leading to superior catalytic degradation activity. Electron paramagnetic resonance (EPR) and other analytical techniques identify ·OH, 1O2, O2−· as the primary active species in the (Co0.2Ni0.2Mn0.2Cu0.2Zn0.2)3O4/PMS system. A degradation mechanism for tetracycline (TC) is also proposed. This study introduces an innovative approach to water treatment by employing high-entropy oxides to activate PMS, demonstrating substantial potential for practical applications.
Date Issued
2025
Publisher
Elsevier
Journal
Separation and Purification Technology
DOI
10.1016/j.seppur.2024.130267
Project
RP 1/22 EAH
Grant ID
BE2020772
HAQ202301
Funding Agency
Jiangsu Key Research and Development Project
Key R&D Projects of Huai’an City
Ministry of Education, Singapore