Abstract: Pure and Ce3+ ions doped ZrO2 NPs were synthesized by using sapindus trifoliatus (family Sapindaceae) solution combustion method at low temperature of 4500C. The purity, size and crystallinity of prepared NPs were attained from PXRD studies. The surface morphology was observed from SEM, mode details with Ce3+ identification were obtained from Raman studies. TEM studies provide the particle size and interplanar distance. The antimicrobial activity of the nanoparticles on E.coli a Gram negative bacterium was explored for the samples by Kirby-Bauer method. The studies revealed bactericidal activity of the NPs. This activity was again confirmed by the colony forming units on LB agar.

Keywords: PXRD, SEM, TEM, E.coli, Gram –bacilli, LB broth, colony forming units.

| DOI: 10.17148/IARJSET.2021.81022