Antibacterial and photocatalytic properties of the engineered nanoparticles against infectious pathogens

Abstract

Abstract Engineered nano particles (ENPs) have been intensively studied within the past decade. In basic and applied science nanotechnology is considering to be an important. Nano particle with good antimicrobial activity have been used in field of medicine for treating certain infectious pathogens. In this paper the toxicity of engineered nanoparticles (ENPs) towards the infectious microorganisms was studied by antimicrobial activity (modified well diffusion method). The comparison of antimicrobial activity of six nano particles was studied, the results show that among those nano particles AgTiO 2 (Silver doped titanium oxide) and AgTiO 2 SiO 2 have good antibacterial effect against both Bacillus sp., (Gram +ve) and E. coli sp., (Gram -ve). Their toxicity is viewed by the zone of inhibition or clearance measurement using standard cm scale. The photocatalytic activity of nano particles against E. coli and Bacillus shows good reduction in the number of viable cells after the treatment process. AgTiO 2 and AgTiO 2 SiO 2 also act as good photo catalysts. These nanoparticles were further characterised by SEM and FT-IR analysis. This study helps to understand the bactericidal properties of doped nanoparticle.