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White and red Brazilian Sao Simao's kaolinite-TiO2 nanocomposites as catalysts for toluene photodegradation from aqueous solutions
dc.creator | Mora, Lucas D. | es_ES |
dc.creator | Trujillano, Raquel | es_ES |
dc.creator | Rives, Vicente | es_ES |
dc.creator | Pérez Bernal, María Elena | es_ES |
dc.creator | Korili, Sophia A. | es_ES |
dc.creator | Gil Bravo, Antonio | es_ES |
dc.creator | Faria, Emerson H. de | es_ES |
dc.date.accessioned | 2020-05-20T08:33:25Z | |
dc.date.available | 2020-05-20T08:33:25Z | |
dc.date.issued | 2019 | |
dc.identifier.issn | 1996-1944 | |
dc.identifier.uri | https://hdl.handle.net/2454/36939 | |
dc.description.abstract | The presence of volatile organic compounds in groundwater is a major concern when it is used as a drinking water source because many of these compounds can adversely affect human health. This work reports on the preparation and characterization of white and red Brazilian Sao Simao's kaolinite-TiO2 nanocomposites and their use as catalysts in the photochemical degradation of toluene, a significant volatile organic compound. The nanocomposites were prepared by a sol-gel procedure, using titanium bis(triethanolaminate)diisopropoxide as a precursor. Thermal treatments of the nanocomposites led to different polymorphic titania phases, while the clay changed from kaolinite to metakaolinite. This structural evolution strongly affected the photocatalytic degradation behavior-all the solids efficiently degraded toluene and the solid calcined at 400 degrees C, formed by kaolinite and anatase, showed the best behavior (90% degradation). On extending the photochemical treatment up to 48 h, high mineralization levels were reached. The advantage of photodegradation using the nanocomposites was confirmed by comparing the results from isolated components (titanium dioxide and kaolinite) to observe that the nanocomposites displayed fundamental importance to the photodegradation pathways of toluene. | en |
dc.description.sponsorship | Brazilian authors thank the funding of this research by Fundaçao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) through projects 2013/19523-3, 2017/15482-1, 1998/11022-3 (thermal analysis and UV-Visible spectroscopy equipment), 2012/11673-3 (FTIR equipment), Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior-Brasil (CAPES), Finance Code 001 and Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) through projects 311767/2015-0 and 303135/2018-2. Spanish authors thank the joint funding from the Spanish Ministry of Economy, Industry and Competitiveness (AEI/MINECO), and the European Regional Development Fund (ERDF) through project MAT2016-78863-C2-R. | en |
dc.format.extent | 18 p. | |
dc.format.mimetype | application/pdf | en |
dc.language.iso | eng | en |
dc.publisher | MDPI | en |
dc.relation.ispartof | Materials, 2019, 12 (23), 3943 | en |
dc.rights | © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license. | en |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
dc.subject | Photodegradation | en |
dc.subject | Kaolinite | en |
dc.subject | Volatile organic compound | en |
dc.subject | Titanium dioxide | en |
dc.subject | Nanocomposites | en |
dc.title | White and red Brazilian Sao Simao's kaolinite-TiO2 nanocomposites as catalysts for toluene photodegradation from aqueous solutions | en |
dc.type | info:eu-repo/semantics/article | en |
dc.type | Artículo / Artikulua | es |
dc.contributor.department | Ciencias | es_ES |
dc.contributor.department | Zientziak | eu |
dc.contributor.department | Institute for Advanced Materials and Mathematics - INAMAT2 | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | en |
dc.rights.accessRights | Acceso abierto / Sarbide irekia | es |
dc.identifier.doi | 10.3390/ma12233943 | |
dc.relation.projectID | info:eu-repo/grantAgreement/ES/1PE/MAT2016-78863 | en |
dc.relation.publisherversion | https://doi.org/10.3390/ma12233943 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | en |
dc.type.version | Versión publicada / Argitaratu den bertsioa | es |