RESUMEN
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 (SCâ¯+â¯HC) for 1, 6 and 12â¯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 2.96â¯eV, for the microcrystals SC, SCâ¯+â¯HC-1â¯h, SCâ¯+â¯HC-6â¯h and SCâ¯+â¯HC-12â¯h, respectively. FE-SEM images show the rod-like microcrystals, however, exhibiting the plane surface (1â¯0â¯1) only for the synthesized microcrystals with the assistance of the hydrothermal method (SCâ¯+â¯HC-1â¯h, SCâ¯+â¯HC- 6â¯h and SCâ¯+â¯HC-12â¯h). The antimicrobial potential was confirmed for all α-Ag2WO4 microcrystals synthesized. However, the SCâ¯+â¯HC-12â¯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⯵gâ¯mL-1, respectively.