Síntese do ZnO via reação de precipitação química acelerada pela sonoquímica e sua aplicação fotocatalítica e antimicrobiana

Abstract

In this work was studied the efficient of the precipitation reaction associated with sonochemistry method to synthesize the nanoparticles of ZnO. The XRD and SEM characterizations reveal a pure ZnO hexagonal crystalline structure and homogeneous star like particles obtained. The photocatalytic tests showed that the obtained ZnO was able to degrade 100%, in 90 minutes, the methyl orange indicator when an acid pH solution was used. Varying the pH solution to neutral scale, the indicator degradation decreases to 48.24%, after 120 minutes. The antibacterial activity was evaluated through the minimum inhibitory concentration measurements (MIC). In the MIC measurements the ZnO nanoparticles (ZnO NP) concentration range was 4300 μg mL-1 to 268.75 μg mL-1 , according to the target bacteria. Lower ZnO NP range of 268.75 μg mL-1 was obtained for Acinetobacter baumannii producing OXA-143 e Klebsiella pneumonia producing OXA-48.