Obtaining Nanoparticles of Chilean Natural Zeolite and its Ion Exchange with Copper Salt (Cu2+) for Antibacterial Applications
| Autor: | A. Fernández-Pérez, Serguei Alejandro-Martín, Judith Vergara-Figueroa, William Gacitúa, Fabiola Cerda, Héctor Pesenti |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Nanoparticle
chemistry.chemical_element 02 engineering and technology ion exchange 010402 general chemistry lcsh:Technology 01 natural sciences Mordenite Article General Materials Science lcsh:Microscopy Zeolite antibacterial properties lcsh:QC120-168.85 Clinoptilolite Minimum bactericidal concentration chilean natural nanozeolite lcsh:QH201-278.5 Ion exchange lcsh:T Chemistry copper salts 021001 nanoscience & nanotechnology Copper 0104 chemical sciences lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology Antibacterial activity lcsh:TK1-9971 Nuclear chemistry |
| Zdroj: | Materials Volume 12 Issue 13 Materials, Vol 12, Iss 13, p 2202 (2019) |
| ISSN: | 1996-1944 |
| Popis: | This article describes the production of nanoparticles of Chilean natural zeolite, using three size reduction methods: Ball mill, microgrinding, and microfluidization. Morphological characterization of samples indicated an average diameter of 37.2 ± 15.8 nm of the zeolite particles. The size reduction and chemical treatments did not affect the morphology or integrity of the zeolite. An increase of the zeolite samples&rsquo Si/Al ratio was observed after the acid treatment and was confirmed by SEM-EDX analysis. Moreover, the effectiveness of the copper salt ion exchange (Cu2+) to the zeolite nanoparticles was analyzed by SEM-EDX. XRD analysis indicated that clinoptilolite and mordenite are the main phases of Chilean natural zeolite, and the crystalline structure was not affected by the modification processes. The FTIR characterization showed the presence of chemical bonds of copper with the zeolite nanoparticle framework. The ion-exchanged zeolite nanoparticles were evaluated for antibacterial behavior by the disc diffusion method. Additionally, the minimum inhibitory concentration and minimum bactericidal concentration were obtained. Microbiological assays with copper-exchanged nanozeolites showed an antimicrobial activity with a bactericidal effect against Escherichia coli and Staphylococcus aureus, which are the primary pathogens of food and are also resistant to multiple drugs. In this study, a new application for natural nanozeolites is demonstrated, as the incorporated copper ions (Cu2+) in nanozeolites registered a productive antibacterial activity. |
| Databáze: | OpenAIRE |
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