Authors: Cai Ling Zhong, Bi Yin Qin, Xin Yuan Xie, Yan Bai

Abstract: In this study, the antioxidant activity and antimicrobial effect of tellurium dioxide nanoparticles (TeO2NPs) sols were evaluated by oxygen radical absorbance capacity (ORAC) and agar diffusion bioassay method, respectively. The results of ORAC demonstrated that the antioxidant activity of TeO2NPs sols was in a dose-dependent manner and TeO2NPs-gallic acid sol showed stronger antioxidant activity than TeO2NPs-acetic acid sol due to the synergistic antioxidant effect of gallic acid and TeO2NPs. On the other hand, the results of agar diffusion bioassay method demonstrated that the antimicrobial effect of TeO2NPs-acetic acid sol was stronger than that of TeO2NPs-gallic acid sol and the two kinds of TeO2NPs sols could evidently inhibit the growth of some gram negative bacteria and gram positive bacteria which lack nitrate reductase. The antimicrobial mechanism of the TeO2NPs sols might be similar to that of tellurite.

Direct link: http://www.scientific.net/JNanoR.25.8