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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Kaolinite-titanium oxide nanocomposites prepared via sol-gel as heterogeneous photocatalysts for dyes degradation

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Autor(es):
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Barbosa, Lorrana Vietro [1] ; Marcal, Liziane [1] ; Nassar, Eduardo J. [1] ; Calefi, Paulo S. [1] ; Vicente, Miguel A. [2] ; Trujillano, Raquel [2] ; Rives, Vicente [2] ; Gil, Antonio [3] ; Korili, Sophia A. [3] ; Ciuffi, Katia J. [1] ; de Faria, Emerson H. [1]
Número total de Autores: 11
Afiliação do(s) autor(es):
[1] Univ Franca, BR-14404600 Franca, SP - Brazil
[2] Univ Salamanca, GIR QUESCAT Dept Quim Inorgan, Salamanca 37008 - Spain
[3] Univ Publ Navarra, Dept Quim Aplicada, Pamplona 31006 - Spain
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: CATALYSIS TODAY; v. 246, p. 133-142, MAY 15 2015.
Citações Web of Science: 27
Resumo

A purified natural kaolinite was functionalized with titanium(IV) isopropoxide via the hydrolytic sol-gel route and thermally treated at several temperatures, between 100 and 1000 degrees C, for 24 h. The resulting solids were used for photodegradation (lambda=365 nm, 30W) of Methylene Blue (MB) and Methyl Orange II (MOII) dyes. All the solids efficiently degraded the dyes and almost total bleaching of the aqueous solutions was observed after 1 h.The best results were found for the solid heated at 400 degrees C, which degraded 93% of MOII and 99% of MB. Comparative studies with titanium oxide P25 from Degussa were tested and the results reveal lower yields than our systems (45% MB and 15% MOIL 1 h). Kaolinite could promote the dispersion of TiO2 on the clay surface allowing a fast degradation of dyes. This effect was confirmed by comparison of the results from isolated components (titanium oxide and kaolinite) and titanium oxide-kaolinite nanocomposites. (C) 2014 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 13/19523-3 - Materiais biohíbridos funcionais baseados em argilas lamelares e/ou fibrosas com aplicações multifacetadas
Beneficiário:Emerson Henrique de Faria
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 13/50216-0 - New clay-based materials with advanced technological and environmental applications
Beneficiário:Katia Jorge Ciuffi Pires
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 11/17660-8 - Estudos das propriedades catalíticas de dipicolinato de Co2+, Mn2+ e Ni2+ imobilizados em caulinita
Beneficiário:Francielle Rodrigues Araújo
Linha de fomento: Bolsas no Brasil - Iniciação Científica