Busca avançada
Ano de início
Entree
Conteúdo relacionado
(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.)

The effect of C-doping on the properties and photocatalytic activity of ZrO2 prepared via sol-gel route

Texto completo
Autor(es):
de Moraes, Nicolas Perciani [1] ; Sampaio Herzog de Azeredo, Caio Affonso [1] ; Bacetto, Leticia Araujo [1] ; Caetano Pinto da Silva, Maria Lucia [1] ; Rodrigues, Liana Alvares [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, EEL, Dept Engn Quim, Estr Municipal Campinho S-N, BR-12602810 Lorena, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: OPTIK; v. 165, p. 302-309, 2018.
Citações Web of Science: 2
Resumo

This work explored the synthesis and characterization of zirconium oxide/carbon xerogel composite, using the material as a photocatalyst in the photodegradation of methylene blue. The band gap energy of the samples was determined using diffuse reflectance spectroscopy. The crystallographic phase, morphology, elemental analysis, analysis of metal content and porosity of the samples was examined by X-ray diffraction, scanning electron microscopy, energy dispersive spectrometry and infrared spectrometry, respectively. The methylene blue concentration was determined using a UV-vis spectrophotometer. The analysis results confirm the formation of zirconium oxide in its monoclinic crystal structure in the pure oxide. The composite presented amorphous structure. The zirconium oxide/carbon xerogel composite presented a higher radiation absorption, in all wavelengths tested. The results regarding the degradation of methylene blue confirm the existence of photocatalytic activity of the materials when submitted to the UVC wavelength. The XZrC composite presented considerably superior photocatalytic efficiency, when compared to the pure semiconductor, as the degradation obtained with the composite was 67% higher than the one obtained with the ZrO2. (C) 2018 Elsevier GmbH. All rights reserved. (AU)

Processo FAPESP: 15/08995-7 - Preparação, modificação e avaliação catalítica de fotocatalisadores à base de Nb2O5
Beneficiário:Liana Alvares Rodrigues
Modalidade de apoio: Auxílio à Pesquisa - Regular