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Biological synthesis of very small silver nanoparticles by culture supernatant of Klebsiella pneumonia: The effects of visible-light irradiation and the liquid mixing process |
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| Authors: | Narges Mokhtari Seyedali Seyedbagheri Khosro Abdi Sara Minaian Ahmad Reza Shahverdi |
| Affiliation: | a Department of Pharmaceutical Biotechnology and Biotechnology Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran b Hydrometallurgy Research Unit, Research & Development Center, National Iranian Copper Industries Company, Sarcheshmeh, Rafsanjan, Iran c Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran d Department of Material Science, Faculty of Engineering, Tarbiat Modares University, Tehran, Iran |
| Abstract: | This study has investigated different visible-light irradiation's effect on the formation of silver nanoparticles from silver nitrate using the culture supernatant of Klebsiella pneumonia. Our study shows that visible-light emission can significantly prompt the synthesis of silver nanoparticles. Also, the study experimentally investigated the liquid mixing process effect on silver nanoparticle synthesis by visible-light irradiation. This study successfully synthesized uniformly dispersed silver nanoparticles with a uniform size and shape in the range of 1-6 nm with an average size of 3 nm. Furthermore, the study investigated the mechanism of the reduction of silver ions by culture supernatant of K. pneumonia, and used X-ray diffraction to characterize silver chloride as an intermediate compound. Silver chloride was prepared synthetically and used as a substrate for the synthesis of silver nanoparticles by culture supernatant of K. pneumonia. The silver nanoparticles have been prepared from silver chloride during this investigation for the first time. |
| Keywords: | A Nanostructures A Elements A Halides C Electron microscopy C X-ray diffraction |
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