Spray drying as feasible processing technique to enhance the photocatalytic activity of the Nb2O5/carbon xerogel composite

Autor(es)

de Moraes, Nicolas Perciani ^[1] ; Anselmo, Rodrigo Barbosa ^[1] ; Sartor, Luis Otavio ^[1] ; Juca Dantas, Gustavo Viegas ^[1] ; Rodrigues, Liana Alvares ^[1] ; Chaguri e Carvalho, Livia ^[1]

Afiliação do(s) autor(es)

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

• Tipo de documento: Artigo Científico
• Fonte: Materials Letters; v. 273, AUG 15 2020.
• Citações Web of Science: 0

Resumo

This work aimed to study the effect of the spray drying technique on the morphological, structural, optical and photocatalytic properties of the Nb2O5/carbon xerogel composite. The results obtained show that the spray drying technique causes a significant change in the morphology of the composites, resulting in spherical and uniform particles. Structurally wise, the composite produced using spray drying has the hexagonal structure of the niobium oxide, whereas the material produced using evaporative drying has an amorphous structure. The optical properties of the composite were also affected, as the bandgap energy of the spray dried material is lower than the one obtained for the composite obtained through evaporative drying. The spray dried material presented superior adsorption capacity and photocatalytic efficiency, indicating that the modifications introduced by the spray drying are suitable to enhance the photocatalytic efficiency of the Nb2O5/carbon xerogel composite. (C) 2020 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 17/03428-2 - Modificação na etapa de secagem no processo de obtenção de fotocalisadores a base de nióbio
• Beneficiário: Lívia Chaguri e Carvalho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/10492-1 - Desenvolvimento e avaliação de heterojunções semicondutor/ZnO/xerogel de carbono na fotodegradação de 4-clorofenol em reator de leito fluidizado e em reator em batelada
• Beneficiário: Liana Alvares Rodrigues
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/16360-0 - Desenvolvimento de compósitos ternários ZnO/Bi2O3/Xerogel de carbono como fotocatalisadores para a degradação de poluentes orgânicos persistentes
• Beneficiário: Nicolas Perciani de Moraes
• Modalidade de apoio: Bolsas no Brasil - Doutorado