Co single atom coupled oxygen vacancy on W18O49 nanowires surface to construct asymmetric active site enhanced peroxymonosulfate activation

Shumin Zhu, Qingdong Ruan, Xingwang Zhu, Dan Li, Bin Wang, Chao Huang, Liangliang Liu, Fangyu Xiong, Jianjian Yi, Yanhua Song, Jinyuan Liu*, Huaming Li, Paul K. Chu*, Hui Xu*

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

13 Citations (Scopus)

Abstract

Enhancing the activation of peroxymonosulfate (PMS) is essential for generating more reactive oxygen species in advanced oxidation process (AOPs). Nevertheless, improving PMS adsorption and expediting interfacial electron transfer to enhance reaction kinetics pose significant challenges. Herein, we construct confined W18O49 nanowires with asymmetric active centers containing Co-Vo-W (Vo: oxygen vacancy). The design incorporates surface-rich Vo and single-atom Co, and the resulting material is employed for PMS activation in water purification. By coupling unsaturated coordinated electrons in Vo with low-valence Co single atoms to construct an the “electron fountainhead”, the adsorption and activation of PMS are enhanced. This results in the generation of more active free radicals (SO4-, OH, O2-) and non-free radicals (1O2) for the decomposition of micropollutants. Thereinto, the degradation rate of bisphenol A (BPA) by Co-W18O49 is 32.6 times faster that of W18O49 monomer, which is also much higher than those of other transition-metal-doped W18O49 composites. This work is expected to help to elucidate the rational design and efficient PMS activation of catalysts with asymmetric active centers. © 2024 Elsevier Inc.
Original languageEnglish
Pages (from-to)736-747
JournalJournal of Colloid and Interface Science
Volume664
Online published21 Feb 2024
DOIs
Publication statusPublished - 15 Jun 2024

Funding

This study was financially supported by the National Natural Science Foundation of China (Nos. 22008095 , 22108106 , 22108110 ), China Postdoctoral Science Foundation (No. 2020M680065 ), Natural Science Foundation of Jiangsu Province (Nos. BK20190981 , BK20220598 ), Hong Kong Scholar Program (No. XJ2021021 ), Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province (No. KFKT2021006 ), City University of Hong Kong Donation Research Grant (DON-RMG No. 9229021 ), City University of Hong Kong Strategic Research Grant (SRG No. 7005505 ), as well as City University of Hong Kong Donation Grant (No. 9220061 ).

Research Keywords

  • Advanced oxidation processes
  • bisphenol A degradation
  • Co single atoms
  • PMS activation
  • W18O49 nanowires

Fingerprint

Dive into the research topics of 'Co single atom coupled oxygen vacancy on W18O49 nanowires surface to construct asymmetric active site enhanced peroxymonosulfate activation'. Together they form a unique fingerprint.

Cite this