Cobalt atom sites anchored on sulfhydryl decorated UiO-66 to activate peroxymonosulfate for norfloxacin degradation
Cobalt atom sites anchored on sulfhydryl decorated UiO-66 to activate peroxymonosulfate for norfloxacin degradation
Authors (9): H. Wang, C. Wang, X. Wang, Q. Chen, S. Liu, R. Cai, S. J. Haigh, Y. Sun, D. Yang
Themes: Circular Economy
DOI: 10.1016/j.jece.2022.108972
Citations: 5
Pub type: journal-article
Pub year: 2023

Publisher: Elsevier BV

Issue: 1

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Publication date(s): 2023/02 (online)

Pages: 108972

Volume: 11 Issue: 1

Journal: NA

Link: [{"URL"=>"https://api.elsevier.com/content/article/PII:S2213343722018450?httpAccept=text/xml", "content-type"=>"text/xml", "content-version"=>"vor", "intended-application"=>"text-mining"}, {"URL"=>"https://api.elsevier.com/content/article/PII:S2213343722018450?httpAccept=text/plain", "content-type"=>"text/plain", "content-version"=>"vor", "intended-application"=>"text-mining"}]

URL: http://dx.doi.org/10.1016/j.jece.2022.108972

Developing heterogeneous catalysts with dispersed single-atom sites is highly desirable to enhance peroxymonosulfate (PMS) activation for pollutant degradation. Herein, a novel PMS activation catalyst, single-atom Co anchored on sulfhydryl decorated UiO-66 (Zr-MSA-Co), was synthesized via the strong coordination between Co and sulfhydryl. The batch and fixed-bed column degradation of norfloxacin (NOR) in Zr-MSA-Co/PMS system showed that the Zr-MSA-Co/PMS system could degrade NOR effectively. Moreover, the degradation performance of the Zr-MSA-Co/PMS system for NOR could be enhanced in the presence of anions (except NO3-) and in complex waters. Particularly, the NOR removal efficiency in secondary wastewater by the fixed-bed reactor could reach 99% within 26 h. The radical quenching experiment and electron paramagnetic resonance confirmed that SO4•-, •O2- and 1O2 were the major reactive oxygen groups. Three plausible NOR degradation pathways (defluorination, piperazine ring opening and decarboxylation) were occurred. Density functional theory (DFT) calculations indicated that S-Co-S was the active site for PMS adsorption and activation. Toxicity evaluation results suggested that the antibacterial effect of the intermediates after degradation was reduced significantly. This work provides a new and green approach to anchor single-atom sites on the exposed termination of metal-organic frameworks for catalytic activation of PMS to degrade pollutants.

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