Synthesis of high-surface-area C3N4 deposited on halloysite-derived silica nanotubes: enhanced visible light degradation of norfloxacin

Santamaría Arana, Leticia; Korili, Sophia A.; Gil Bravo, Antonio; López de Luzuriaga Fernández, José Manuel; Monge Oroz, Miguel

Synthesis of high-surface-area C3N4 deposited on halloysite-derived silica nanotubes: enhanced visible light degradation of norfloxacin

dc.contributor.author	Santamaría Arana, Leticia
dc.contributor.author	Korili, Sophia A.
dc.contributor.author	Gil Bravo, Antonio
dc.contributor.author	López de Luzuriaga Fernández, José Manuel
dc.contributor.author	Monge Oroz, Miguel
dc.contributor.department	Ciencias	es_ES
dc.contributor.department	Zientziak	eu
dc.contributor.department	Institute for Advanced Materials and Mathematics - INAMAT2	en
dc.date.accessioned	2024-05-30T12:00:58Z
dc.date.available	2024-05-30T12:00:58Z
dc.date.issued	2024
dc.date.updated	2024-05-30T11:38:12Z
dc.description.abstract	Silica nanotubes, obtained from halloysite clay nanotubes that were calcined and acid-activated, were used as support for graphitic carbon nitride (g-C3N4) via a simple deposition method. They were chosen in order to avoid any agglomeration issues, as there was an increase of the specific surface area with respect to pristine halloysite. The composite was tested for the degradation of a persistent emerging pollutant in water, namely, antibiotic norfloxacin. Experiments were performed in darkness (until adsorption-desorption equilibrium was attained) and, subsequently under visible light. Comparison of the performance between the photocatalysts shows that the composite was 49% faster than g-C3N4. The introduction of persulfate in the lumen of the nanotubes via vacuum negative-pressure suction and injection was also tested for the generation of .OH radicals that fasten the degradation rate, obtaining a further 47% increase in the degradation rate of norfloxacin thanks to the release of this anion during the photodegradation process. The degradation mechanism of SiO2/g-C3N4 sample was studied with trapping experiments by the use of scavengers that were introduced to quench the photodegradation: triethanolamine for photoexcited holes (h+), tert-butanol for hydroxyl radicals (.OH) and a N2 atmosphere for superoxide radicals (.O2.).	en
dc.description.sponsorship	J. M. L. L. and M.M. thank the DGI MICINN/FEDER (project number PID2022-139739NB-I00 (AEI/FEDER, UE)) and by 'ERDF A way of making Europe'. Authors from Universidad Pública de Navarra are grateful for financial support from the Spanish Ministry of Science and Innovation (AEI/MINECO) through project PID2020-112656RBC21. L. S. thanks the Universidad Pública de Navarra for a post-doctoral Margarita Salas grant, financed by the European Union-Next Generation EU.	en
dc.format.mimetype	application/pdf	en
dc.format.mimetype	application/msword	en
dc.identifier.citation	Santamaría, L., Korili, S. A., Gil, A., López-de-Luzuriaga, J. M., Monge, M. (2024) Synthesis of high-surface-area C3N4 deposited on halloysite-derived silica nanotubes: Enhanced visible light degradation of norfloxacin. Catalysis Today, 432(1). https://doi.org/10.1016/j.cattod.2024.114584.	es_ES
dc.identifier.doi	10.1016/j.cattod.2024.114584
dc.identifier.issn	0920-5861
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/48214
dc.language.iso	eng	en
dc.publisher	Elsevier	en
dc.relation.ispartof	Catalysis Today (2024), vol. 432, 114584	es_ES
dc.relation.projectID	info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica, Técnica y de Innovación 2021-2023/PID2022–139739NB-I00/ES/
dc.relation.projectID	info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-112656RB-C21/ES/
dc.relation.publisherversion	https://doi.org/10.1016/j.cattod.2024.114584
dc.rights	© 2024 The Author(s). This is an open access article under the CC BY license.	en
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/
dc.subject	Halloysite nanotubes	en
dc.subject	Graphitic carbon nitride	en
dc.subject	Nanocomposites	en
dc.subject	Antibiotic degradation	en
dc.subject	Visible-light photocatalysis	en
dc.title	Synthesis of high-surface-area C3N4 deposited on halloysite-derived silica nanotubes: enhanced visible light degradation of norfloxacin	en
dc.type	info:eu-repo/semantics/article
dc.type.version	info:eu-repo/semantics/publishedVersion
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