Antimicrobial properties of α-Ag2WO4 rod-like microcrystals synthesized by sonochemistry and sonochemistry followed by hydrothermal conventional method
| Autor: | Ivanildes dos Santos Bastos, Walter Ricardo Brito, Edgar Alves Araújo Júnior, Mitsuo Lopes Takeno, Raquel Oliveira dos Santos Fontenelle, José Milton Elias de Matos, Francisco Xavier Nobre, Patrícia Puccinelli Orlandi, Josilayne de Fátima Souza Mendes, Paulo Rogério da Costa Couceiro, Lizandro Manzato |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Acoustics and Ultrasonics 02 engineering and technology 010402 general chemistry 01 natural sciences Hydrothermal circulation Sonochemistry Inorganic Chemistry chemistry.chemical_compound symbols.namesake Tungstate Phase (matter) Chemical Engineering (miscellaneous) Environmental Chemistry Radiology Nuclear Medicine and imaging Spectroscopy Organic Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry symbols Orthorhombic crystal system Diffuse reflection 0210 nano-technology Raman spectroscopy Nuclear chemistry |
| Zdroj: | Ultrasonics Sonochemistry. 58:104620 |
| ISSN: | 1350-4177 |
| DOI: | 10.1016/j.ultsonch.2019.104620 |
| Popis: | In this study we report the synthesis of silver tungstate microcrystals (α-Ag2WO4) by sonochemistry method (SC) at 65 °C and sonochemistry followed by conventional hydrothermal (SC + HC) for 1, 6 and 12 h, at 140 °C. The structural characterization by XRD confirms the alpha phase of the orthorhombic structure and the space group Pn2n, for all synthesized microcrystals. All the actives modes identified at the Raman spectroscopy were characteristic of alpha phase. The optical band gap by UV–Vis spectroscopy using the diffuse reflectance were 2.98, 3.0, 2.99 and 2.96 eV, for the microcrystals SC, SC + HC-1 h, SC + HC-6 h and SC + HC-12 h, respectively. FE-SEM images show the rod-like microcrystals, however, exhibiting the plane surface (1 0 1) only for the synthesized microcrystals with the assistance of the hydrothermal method (SC + HC-1 h, SC + HC– 6 h and SC + HC-12 h). The antimicrobial potential was confirmed for all α-Ag2WO4 microcrystals synthesized. However, the SC + HC-12 h microcrystals were more susceptible in the bacterial and fungal inhibition, with MIC values for microorganisms C. albicans, T. rubrum, MRSA e EHEC, 0.2–0.5, 4–9, 250 and 31.25 μg mL−1, respectively. |
| Databáze: | OpenAIRE |
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