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- Title
BIOREDUCTIVE SYNTHESIS OF PLATINUM NANOPARTICLES BY Shewanella oneidensis MR-1.
- Authors
Adrian, GHINEA; Cristina, MOISESCU; Matei-Tom, IACOB; Ana Maria, MOROSANU; Ioan, ARDELEAN I.
- Abstract
Currently, different biosynthetic methods that use either microorganisms or plant extracts are being developed as an alternative to the more polluting chemical synthesis procedures for obtaining nanomaterials. Special attention is paid to the biosynthesis of precious metals nanoparticles, in particular to platinum nanoparticles due to their multiple catalytic applications, such as degradation of organic dyes, redox reactions or electrocatalytic and catalytic conversions. In this work, we propose an environmentally friendly method for producing platinum nanoparticles using the metal ion-reducing Shewanella oneidensis MR-1. Resting cells of S. oneidensis MR-1 were used to reduce aqueous Pt4+ ions and deposit them as metallic platinum nanoparticles (Pt0), at room temperature and at neutral pH. Both lactate and succinate were used as electron donors. Different anaerobic techniques for the cultivation and manipulation of the bacterial cells were used instead of an anaerobic chamber, which seems to be a shortcoming for larger applications. Biosynthesized platinum nanoparticles were characterized through UV-VIS spectroscopy, fluorimetry techniques, and TEM.
- Subjects
SHEWANELLA oneidensis; METAL nanoparticles; PRECIOUS metals; CHEMICAL synthesis; OXIDATION-reduction reaction; PLATINUM nanoparticles; ELECTRON donors; FLUORIMETRY
- Publication
Oltenia, Studii si Comunicari Seria Stiintele Naturii, 2021, Vol 37, Issue 1, p192
- ISSN
1454-6914
- Publication type
Article