Details

Autor(en) / Beteiligte

• Nobre, Francisco Xavier
• Bastos, Ivanildes Santos
• dos Santos Fontenelle, Raquel Oliveira
• Júnior, Edgar Alves Araújo
• Takeno, Mitsuo Lopes
• Manzato, Lizandro
• de Matos, José Milton Elias
• Orlandi, Patrícia Puccinelli
• de Fátima Souza Mendes, Josilayne
• Brito, Walter Ricardo
• da Costa Couceiro, Paulo Rogério

Titel

Antimicrobial properties of α-Ag2WO4 rod-like microcrystals synthesized by sonochemistry and sonochemistry followed by hydrothermal conventional method

Ist Teil von

• Ultrasonics sonochemistry, 2019-11, Vol.58, p.104620-104620, Article 104620

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •α-Ag2WO4 synthesized by sonochemistry and sonochemistry/hydrothermal method.•Antibacterial susceptibility of α-Ag2WO4 against Staphylococcus aureus and Escherichia coli.•Antimicrobial potential for microorganisms C. albicans and T. rubrum. 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.