Rapid hydrothermal synthesis and pH-dependent photocatalysis of strontium titanate microspheres

Autor(es)

Mourao, Henrique A. J. L. ^[1] ; Lopes, Osmando F. ^{[2, 3]} ; Ribeiro, Caue ^[2] ; Mastelaro, Valmor R. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Fed Vales Jequitinhonha & Mucuri, Inst Ciencia & Tecnol, BR-39100000 Diamantina, MG - Brazil

^[2] Embrapa Instrumentacao, BR-13560970 Sao Carlos, SP - Brazil

^[3] Univ Fed Sao Carlos UFSCar, Dept Quim, BR-13565905 Sao Carlos, SP - Brazil

^[4] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING; v. 30, p. 651-657, FEB 2015.
• Citações Web of Science: 25

Resumo

This manuscript describes a methodology for a rapid hydrothermal conventional synthesis of SrTiO3. The time of synthesis and use of mechanical stirring are related to the structural, morphological and photocatalytic properties of the samples synthesized. When the synthesis was carried out with mechanical stirring, the conventional hydrothermal method was fast and efficient for the obtaining of an SrTiO3 phase after a one-minute treatment. The stirring of the precursor solution during the synthesis affected the crystalline phase, morphology and thermal stability positively. All synthesized samples showed a good photoactivity towards methylene blue (MB) degradation under UVC irradiation. In addition, the photodegradation of MB and Rhodamine B (RhB) dye was studied at different PH values and higher efficiencies were achieved under alkaline and acidic conditions for MB and RhB, respectively. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 08/57872-1 - Instituto Nacional de Ciências dos Materiais em Nanotecnologia
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs