Synthesis, characterization, photocatalytic, and antimicrobial activity of ZrO2 nanoparticles and Ag@ZrO2 nanocomposite prepared by the advanced oxidative process/hydrothermal route

Autor(es)

Nova, C. V. ^[1] ; Reis, K. A. ^[2] ; Pinheiro, A. L. ^[2] ; Dalmaschio, C. J. ^[3] ; Chiquito, A. J. ^[4] ; Teodoro, M. D. ^[5] ; Rodrigues, A. D. ^[6] ; Longo, E. ^[7] ; 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 Estadual Paulista Unesp, Dept Biol, POB 473, BR-17033360 Bauru, SP - Brazil

^[3] Univ Fed Espirito Santo UFES, Dept Chem, BR-29075910 Vitoria, ES - Brazil

^[4] Univ Fed Sao Carlos, Dept Phys, NanO LaB, POB 676, BR-13565905 Sao Carlos, SP - Brazil

^[5] Univ Fed Sao Carlos, Dept Phys, Grp Nanoestruturas Semicond, Via Washington Luiz, Km 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil

^[6] Univ Fed Sao Carlos, Dept Phys, Via Washington Luiz, Km 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil

^[7] Univ Fed Sao Carlos, LIEC CDMF Dept Chem, 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. 98, n. 1 FEB 2021.
• Citações Web of Science: 0

Resumo

ZrO2 nanoparticles (ZrO2 NPs) and Ag@ZrO2 nanocomposite (Ag@ZrO2 NCs) were prepared from zirconium (IV) butoxide in the absence of base or acid mineraliser by the advanced oxidation processes (AOP) and subsequent hydrothermal treatment. Samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscope (SEM), Raman, Photoluminescence (PL), Fourier transform infrared (FTIR), and diffuse reflectance spectroscopy (DRS). XRD and Raman analyses confirmed ZrO2 NPs and Ag@ZrO2 NCs tetragonal crystalline phase synthesized at 200 degrees C for 1 h. HRTEM images of ZrO2 NPs and Ag@ZrO2 NCs after treatment at 200 degrees C indicated small nanoparticles with characteristic size of 5-8 nm (ZrO2) and 40-50 nm (Ag NPs). It was found that Ag@ZrO2 NCs showed outstanding photocatalytic activity in photodegradation Rhodamine B dye compared with pure ZrO2 NPs. Antibacterial activity tests of ZrO2 NPs and Ag@ZrO2 NCs were carried out using E. coli and S. aureus as model strains of Gram-negative and Gram-positive bacteria, respectively. Ag@ZrO2 NCs were capable of efficiently growth inhibition of bacteria cultures in more than 75% E. Coli compared to ZrO2 NPs that exhibited <10% instead. However, at the same concentration (for example 0.25 mg/mL) we found that both ZrO2 NPs and Ag@ZrO2 NCs were significantly more effective against S. aureus in comparison with E. coli showing bacterial growth inhibition higher than 90% for S. aureus. Morphological observation of bacterial cells by scanning electron microscopy (SEM) revealed that nanoparticles and nanocomposite caused irreversible damage to the cell membrane. {[}GRAPHICS] . (AU)

• 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: 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: 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