Síntese sonoquímica associada a agitação mecânica de nanopartículas de óxido de cério e óxido de cério dopado com zinco (CeO₂, CeO₂/Ce e CeO₂-ZnO) e suas propriedades antimicrobianas

Abstract

This work aimed to study the synthesis route and antibacterial properties of pure and zinc-doped cerium oxide (CeO₂, CeO₂-ZnO). The synthesis was based on the chemical precipitation reaction from a solution containing cerium and zinc metal ions and then directed to an ultrasonic bath with mechanical agitation, varying the addition of distilled water. The differential of the methodology used in this work is the time and energy cost of synthesis, since the powder was obtained in 18 minutes of synthesis, with a temperature of only 50 ºC. Then, with the obtained powders, analyzes of crystallinity, purity and morphology of the material were carried out, through the X-ray diffraction technique, with which the pure ceramic phases were observed, showing high similarity with the standard chart (PDF 89-8436 ). With the analysis of bactericidal activity, the minimum inhibitory concentration (MIC) test was performed, with which even in high contractions of 4250 µg mL-1, the samples did not provide positive results in relation to their antibacterial characteristic.