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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

White and Red Brazilian Sao Simao's Kaolinite-TiO2 Nanocomposites as Catalysts for Toluene Photodegradation from Aqueous Solutions

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Author(s):
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Mora, Lucas D. [1] ; Bonfim, Larissa F. [1] ; Barbosa, Lorrana V. [1] ; da Silva, Tiago H. [1] ; Nassar, Eduardo J. [1] ; Ciuffi, Katia J. [1] ; Gonzalez, Beatriz [2] ; Vicente, Miguel A. [2] ; Trujillano, Raquel [2] ; Rives, Vicente [2] ; Perez-Bernal, Maria Elena [2] ; Korili, Sophia [3] ; Gil, Antonio [3] ; de Faria, Emerson H. [1]
Total Authors: 14
Affiliation:
[1] Univ Franca Unifran, Grp Pesquisas Mat Lamelares Hibridos GPMatLam, Ave Dr Armando Salles Oliveira 201, Parque Univ, BR-14404600 Franca, SP - Brazil
[2] Univ Salamanca, GIR QUESCAT, Dept Quim Inorgan, E-37008 Salamanca - Spain
[3] Univ Publ Navarra, INAMAT, Dept Ciencias, E-31006 Pamplona - Spain
Total Affiliations: 3
Document type: Journal article
Source: MATERIALS; v. 12, n. 23 DEC 2019.
Web of Science Citations: 0
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. (AU)

FAPESP's process: 12/11673-3 - Thin films obtained by spin and dip-coating using sol-gel methodology
Grantee:Eduardo José Nassar
Support type: Regular Research Grants
FAPESP's process: 13/19523-3 - Functional Biohybrid materials based on layered and/or fibrous natural clays with multifaceted applications
Grantee:Emerson Henrique de Faria
Support type: Regular Research Grants
FAPESP's process: 17/15482-1 - Novel strategies synthesis to reuse Tanner industry by-products to obtain high-value functional porous materials
Grantee:Emerson Henrique de Faria
Support type: Regular Research Grants