Revista de Bioprocessamento e Biotécnicas

Solar Light Induced Photo Catalytic Disinfection of Gram Positive and Negative Microorganisms from Water with Highly Efficient AuTiO2 Nanoparticle

Abstract

Sandhya S, Sadhana Rayalu and Benedict Bruno

AuTiO2 nanomaterial was used for solar photocatalytic disinfection of gram negative Escherichia coli and gram positive Staphylococci aureus. In this study, time of disinfection, light intensity, concentration of nanomaterial and bacterial concentration effects has been investigated. Prepared nanomaterial characterized using Scanning Electron Microscopy (SEM), X-Ray Diffractometry (XRD). AuTiO2 samples have shown antibacterial effect when irradiated in solar light. The bactericidal effect may be due to Au ions and photocatalysis of TiO2. The photocatalytic inactivation rate constant, k for each dose were obtained from their respective inactivation curve over a 2 hours incubation period.