Effect of hydrothermal temperature on the antibacterial and photocatalytic activity of WO3 decorated with silver nanoparticles

Autor(es):Mostrar menos -

Capeli, R. A. ^[1] ; Belmonte, T. ^[2] ; Caierao, J. ^[3] ; Dalmaschio, C. J. ^[4] ; Teixeira, S. R. ^[5] ; Mastelaro, V. R. ^[6] ; Chiquito, A. J. ^[7] ; Teodoro, M. D. ^[8] ; Domenegueti, J. F. M. ^[8] ; Longo, E. ^[9] ; Trindade, L. G. ^[1] ; Pontes, F. M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista Unesp, Dept Chem, POB 473, BR-17033360 Bauru, SP - Brazil

^[2] Univ Fed Rio Grande do Sul, Pharmaceut Sci Postgrad Program, Porto Alegre, RS - Brazil

^[3] Univ Fed Rio Grande do Sul, Dept Anal, Fac Pharm, Porto Alegre, RS - Brazil

^[4] Univ Fed Espirito Santo UFES, Dept Chem, BR-29075910 Vitoria, ES - Brazil

^[5] Univ Estadual Paulista, Dept Phys, Fac Ciencias & Tecnol FCT, Rua Roberto Simonsen 305, BR-19060900 Presidente Prudente, SP - Brazil

^[6] Univ Sao Paulo, Phys Inst Sao Carlos IFSC, Sao Carlos, SP - Brazil

^[7] Univ Fed Sao Carlos, NanO LaB, Dept Phys, Via Washington Luiz, Km 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil

^[8] Univ Fed Sao Carlos, Dept Phys, Grp Nanoestrut Semicond, Via Washington Luiz, Km 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil

^[9] Univ Fed Sao Carlos, Dept Chem, CDMF, LIEC, Via Washington Luiz, Km 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Sol-Gel Science and Technology; v. 97, n. 1 NOV 2020.
• Citações Web of Science: 1

Resumo

We studied the catalytic and antimicrobial properties of hierarchical architecture of WO3.Ag synthesized at 100, 150, and 200 degrees C by a very simple and reliable hydrothermal technique. The investigation carried out by XRD showed the amorphous nature of sample grown at 100 degrees C, while those at 150 and 200 degrees C crystalline nature of 3D WO3.Ag was confirmed. From FESEM and HRTEM results, it was evident that the silver nanoparticles grew in a 3D WO3.Ag host matrix. The average diameter of Ag nanoparticles by HRTEM was around 5-15 nm. Photocatalytic activities of as-prepared samples were evaluated by the degradation of rhodamine B (RhB). Samples prepared at 150 and 200 degrees C showed higher activity in comparison to sample prepared at 100 degrees C. This can be mainly attributed to the suppression of traps states and electron/hole pairs recombination as highlighted by the photoluminescence results. The as-synthetized samples showed promising antimicrobial features against various bacterial strains. The 100 degrees C WO3.Ag nanospheres exhibited the highest antibacterial activity, with very low minimum inibitory concentration (MIC) values (4.0-8.0 mu g/ml) when compared with 150 and 200 degrees C samples. (AU)

• Processo FAPESP: 12/14106-2 - Designe de óxidos multifuncionais com arquitetura perovskite (Pb,Sr,La, Bi) (Ti,Fe) O3
• Beneficiário: Fenelon Martinho Lima Pontes
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• 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
• Processo FAPESP: 11/20536-7 - Materiais Ferroelétricos Multifuncionais: Estudos das Propriedades Ópticas, Elétricas e Fotoluminescente.
• Beneficiário: Debora da Silva Lima Pontes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado