文章基本信息

标题：Síntese de nanocompósito de grafeno e ferrita de manganês e a investigação de suas propriedades antibacterianas para uso no tratamento de água
其他标题：Manganese ferrite graphene nanocomposite synthesis and the investigation of its antibacterial properties for water treatment purposes
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作者：Soletti, Lara de Souza ; Ferreira, Maria Eliana Camargo ; Kassada, Alex Toshio 等
期刊名称：Revista Ambiente & Água
印刷版ISSN：1980-993X
出版年度：2020
卷号：15
期号：4
页码：1-12
DOI：10.4136/ambi-agua.2515
出版社：Instituto de Pesquisas Ambientais em Bacias Hidrográficas
摘要：The main objective of this study was to synthesize a nanocomposite using graphene and manganese ferrite nanoparticles (MnFe2O4-G) and to evaluate its antibacterial activity for water treatment purposes. Its morphological characteristics were evaluated by instrumental techniques, such as scanning electron microscopy and transmission electron microscopy. The characterization results indicated that the nanocomposite presented nanoparticles of approximately 25 nm well dispersed in transparent and large (14 μm) graphene nanosheets. The antibacterial activity was evaluated in a batch experiment using a concentration of 40 μg mL-1 of nanocomposite (MnFe2O4-G, bare MnFe2O4 nanoparticles or graphene oxide), 1x105 CFU mL-1 of Escherichia coli, and 8 h of contact time at room temperature. The highest antibacterial capacity was observed for the hybrid nanocomposite (91.91%), due to the synergic effect of graphene and MnFe2O4 nanoparticles. Various mechanisms were proposed to explain the effective antibacterial activity of MnFe2O4-G, such as wrapping, oxidative stress, sharp-edge cutting effect, among others. The results showed that MnFe2O4-G is a potential alternative in water treatment processes as an antibacterial agent.
关键词：antimicrobiano;magnético;nanopartícula
其他关键词：antimicrobial;magnetic;nanoparticle