Effect of metal doping in the photocatalytic properties of carbon xerogel-Nb2O5 composite towards visible light degradation of methylene blue

Autor(es)

de Moraes, Nicolas Perciani ^[1] ; Caetano Pinto da Silva, Maria Lucia ^[1] ; Rodrigues, Liana Alvares ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, EEL, Dept Engn Quim, Estr Municipal Campinho S-N, BR-12602810 Lorena, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Letters; v. 228, p. 486-489, OCT 1 2018.
• Citações Web of Science: 1

Resumo

This study explores the development of metal doped hybrid Nb2O5/carbon xerogel photocatalysts. The materials were characterized by diffuse reflectance spectroscopy, scanning electron microscopy, dispersive energy spectroscopy and X-ray diffraction. The X-ray diffractograms of the materials are characteristic of amorphous carbon. The palladium doped composite also exhibits the hexagonal phase of the niobium oxide. The chemical elements are evenly distributed on the materials, confirming the dispersion of the doping metals in the material matrix. All composite materials absorb radiation in the visible light region. All composites exhibited photocatalytic activity under visible radiation, except for the iron doped material. The palladium doped material showed superior efficiency in the degradation of methylene blue, due to its lower band gap and higher absorption of visible light. (C) 2018 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 16/20920-5 - Fotocatálise heterogênea aplicada na degradação de poluentes orgânicos utilizando catalisador híbrido de óxido de zinco-xerogel de carbono
• Beneficiário: Nicolas Perciani de Moraes
• Linha de fomento: Bolsas no Brasil - Mestrado
• Processo FAPESP: 15/08995-7 - Preparação, modificação e avaliação catalítica de fotocatalisadores à base de Nb2O5
• Beneficiário: Liana Alvares Rodrigues
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/04244-0 - Preparação, modificação e avaliação catalítica de fotocatalisadores híbridos TiO2/Xerogel de carbono
• Beneficiário: Nicolas Perciani de Moraes
• Linha de fomento: Bolsas no Brasil - Iniciação Científica