Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8161321 | Physica B: Condensed Matter | 2018 | 22 Pages |
Abstract
We report on the sol-gel based room temperature synthesis of undoped SnO2 and Ag-SnO2 nanostructures. The synthesized nanostructures were characterized by Fourier transform infrared spectroscopy, X-ray diffraction (XRD), Raman spectroscopy, High-resolution transmission electron microscopy (HR-TEM) and UV-visible spectroscopy. The XRD pattern confirmed that the obtained nanostructures have a tetragonally rutile structure. No extra phase changes were observed after Ag doping. UV-visible spectroscopy measurements indicated that the band gap of 3.59Â eV for pure SnO2 nanostructures, decreased to 3.39Â eV after doping. TEM analysis showed that no regular shape morphology existed and some rod-shaped particles were also detected in the nanostructures. The antibacterial activity of the nanostructures against E. coli was evaluated and a continuous decrease of microbial count was observed. The microbial population decreased from 6 Ã 105Â cfu/ml to 7 Ã 104Â cfu/ml and 5 Ã 104Â cfu/ml on SnO2 and Ag-SnO2 treatments, respectively. Thus, the nanostructures can be used for the biorational management of E. coli for waste water treatment before discharge.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Kishore Kumar Nair, Promod Kumar, Vinod Kumar, R.A. Harris, R.E. Kroon, Bennie Viljoen, P.M. Shumbula, M. Mlambo, H.C. Swart,