1. Universidade Federal do Rio Grande do Norte
2. Centro de Tecnologia
3. DEMAT - Departamento de Engenharia de Materiais
4. CT - DEMAT - Artigos publicados em periódicos

Título:	Study of the photocatalysis and increase of antimicrobial properties of Fe3+and Pb2+ co-doped ZnO nanoparticles obtained by microwave-assisted hydrothermal method
Autor(es):	Paskocimas, Carlos Alberto Andrade Neto, Nivaldo Freire de Matsui, Katia Nicolau Delmonte, Maurício Roberto Bomio Motta, Fabiana Villela da
Palavras-chave:	ZnO;Co-doping;Photocatalysis;Antimicrobial activity
Data do documento:	Abr-2019
Editor:	Elsevier
Referência:	ANDRADE NETO, N.F. ; MATSUI, K.N. ; PASKOCIMAS, C. A. ; BOMIO, M. R. D. ; MOTTA, F.V. . Study of the photocatalysis and increase of antimicrobial properties of Fe3+and Pb2+ co-doped ZnO nanoparticles obtained by microwave-assisted hydrothermal method. MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, v. 93, p. 123-133, 2019. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S1369800118313878?via%3Dihub Acesso em: 03 dez. 2020. https://doi.org/10.1016/j.mssp.2018.12.034.
Resumo:	The difficulty in treating organic effluents and increasing the resistance of microorganisms to conventional treatments promotes the development of new materials for these applications. In this work, it was obtained ZnO co-doped with Fe3+ and Pb2+ (ZnO:xFe:yPb, with x and y varying between 0, 1, 3 and 7 mol%) by microwave-assisted hydrothermal method with a reaction temperature of 140 °C for 30 min. The powders were characterized by X-ray diffraction (XRD), field-scanning electron microscopy (SEM), Brunauer-Emmett-Teller method (BET) ultraviolet diffuse reflectance spectroscopy (DRS-UV), X-ray fluorescence analysis (XRF) and Fourier transform infrared spectroscopy (FTIR). Photocatalytic properties were estimated by the degradation of the methylene blue dye when subjected to UV radiation. The antimicrobial properties were investigated by the formation of inhibition halos against E. coli and S. aureus bacteria. The XRD patterns show that there was no formation of secondary phases, obtaining only the ZnO phase, with hexagonal structure. Through the XRD, it can be seen that the intensity of the characteristic peaks is also reduced as the dopant concentration increases, indicating the appearance of defects in the crystalline lattice. SEM images show that an increase in the dopant concentration promotes a loss in the morphology of ZnO nanoparticles, accompanied by a reduction in their mean size. The codoping reduces the photocatalytic activity of ZnO against the methylene blue dye, but increases the anti-microbial activity against E. coli and S. aureus bacteria
URI:	https://repositorio.ufrn.br/handle/123456789/32033
ISSN:	1369-8001
Embargado até:	2021-05
Aparece nas coleções:	CT - DEMAT - Artigos publicados em periódicos CT - DEQ - Artigos publicados em periódicos

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