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Article: N-doped graphitic C3N4 nanosheets decorated with CoP nanoparticles: A highly efficient activator in singlet oxygen dominated visible-light-driven peroxymonosulfate activation for degradation of pharmaceuticals and personal care products

TitleN-doped graphitic C<inf>3</inf>N<inf>4</inf> nanosheets decorated with CoP nanoparticles: A highly efficient activator in singlet oxygen dominated visible-light-driven peroxymonosulfate activation for degradation of pharmaceuticals and personal care products
Authors
KeywordsCoP/N-g-C N 3 4
Non-radical way
PMS activation
PPCPs
Visible light
Issue Date2021
Citation
Journal of Hazardous Materials, 2021, v. 416, article no. 125891 How to Cite?
AbstractCoP nanoparticle-loaded N-doped graphitic C3N4 nanosheets (CoP/N-g-C3N4) were fabricated via a facile three-step method to degrade pharmaceuticals and personal care products (PPCPs) via a visible-light-driven (VLD) peroxymonosulfate (PMS) activation system. 2 ppm carbamazepine (CBZ) can be removed completely within 10 min by the VLD-PMS system with a kinetic constant of k = 0.29128 min−1, as 25.8 times compared to that under dark conditions (k = 0.01128 min−1). The experimental and theoretical results showed that the doped graphitic N atoms could modulate the electronic properties of the g-C3N4 nanosheets. Subsequently, the Density Functional Theory (DFT) explained that CoP showed preference to bonding with the nitrogen atoms involved in the newly formed N˭N bond, and the Co‒N bond dramatically enhanced the transfer of photo-generated electrons from the N-g-C3N4 nanosheets. Electron paramagnetic resonance (EPR) tests show that singlet oxygen (1O2) plays a leading role in this case. Moreover, PMS molecules are also tended to be absorbed onto the electron-deficient carbon atoms near the newly formed N˭N bonds for PMS reduction, synergistically enhancing the degradation efficiency for CBZ and benzophenone-3 (BZP). The newly established VLD-PMS activation system was shown to treat the actual sewage in Hong Kong sewage treatment plants (STPs) very well. This work supplements the fundamental theory of radical and non-radical pathways in the sulfate radical (SO4•-)-based advanced oxidation process (SR-AOP) for environmental cleanup purposes.
Persistent Identifierhttp://hdl.handle.net/10722/341309
ISSN
2023 Impact Factor: 12.2
2023 SCImago Journal Rankings: 2.950
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorDong, Chencheng-
dc.contributor.authorZheng, Zexiao-
dc.contributor.authorWang, Zhiqiang-
dc.contributor.authorHe, Juhua-
dc.contributor.authorYe, Zhichao-
dc.contributor.authorGong, Xueqing-
dc.contributor.authorLo, Irene M.C.-
dc.date.accessioned2024-03-13T08:41:48Z-
dc.date.available2024-03-13T08:41:48Z-
dc.date.issued2021-
dc.identifier.citationJournal of Hazardous Materials, 2021, v. 416, article no. 125891-
dc.identifier.issn0304-3894-
dc.identifier.urihttp://hdl.handle.net/10722/341309-
dc.description.abstractCoP nanoparticle-loaded N-doped graphitic C3N4 nanosheets (CoP/N-g-C3N4) were fabricated via a facile three-step method to degrade pharmaceuticals and personal care products (PPCPs) via a visible-light-driven (VLD) peroxymonosulfate (PMS) activation system. 2 ppm carbamazepine (CBZ) can be removed completely within 10 min by the VLD-PMS system with a kinetic constant of k = 0.29128 min−1, as 25.8 times compared to that under dark conditions (k = 0.01128 min−1). The experimental and theoretical results showed that the doped graphitic N atoms could modulate the electronic properties of the g-C3N4 nanosheets. Subsequently, the Density Functional Theory (DFT) explained that CoP showed preference to bonding with the nitrogen atoms involved in the newly formed N˭N bond, and the Co‒N bond dramatically enhanced the transfer of photo-generated electrons from the N-g-C3N4 nanosheets. Electron paramagnetic resonance (EPR) tests show that singlet oxygen (1O2) plays a leading role in this case. Moreover, PMS molecules are also tended to be absorbed onto the electron-deficient carbon atoms near the newly formed N˭N bonds for PMS reduction, synergistically enhancing the degradation efficiency for CBZ and benzophenone-3 (BZP). The newly established VLD-PMS activation system was shown to treat the actual sewage in Hong Kong sewage treatment plants (STPs) very well. This work supplements the fundamental theory of radical and non-radical pathways in the sulfate radical (SO4•-)-based advanced oxidation process (SR-AOP) for environmental cleanup purposes.-
dc.languageeng-
dc.relation.ispartofJournal of Hazardous Materials-
dc.subjectCoP/N-g-C N 3 4-
dc.subjectNon-radical way-
dc.subjectPMS activation-
dc.subjectPPCPs-
dc.subjectVisible light-
dc.titleN-doped graphitic C<inf>3</inf>N<inf>4</inf> nanosheets decorated with CoP nanoparticles: A highly efficient activator in singlet oxygen dominated visible-light-driven peroxymonosulfate activation for degradation of pharmaceuticals and personal care products-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jhazmat.2021.125891-
dc.identifier.pmid34492829-
dc.identifier.scopuseid_2-s2.0-85105832884-
dc.identifier.volume416-
dc.identifier.spagearticle no. 125891-
dc.identifier.epagearticle no. 125891-
dc.identifier.eissn1873-3336-
dc.identifier.isiWOS:000664747000001-

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