Nanomaterial resistant microorganism mediated reduction of graphene oxide

Chouhan, Raghuraj Singh and Pandey, Ashish and Qureshi, Anjum and Özgüz, Volkan Hüsnü and Kolkar Mohammed, Javed Hussain Niazi (2016) Nanomaterial resistant microorganism mediated reduction of graphene oxide. Colloids and Surfaces B: Biointerfaces, 146 . pp. 39-46. ISSN 0927-7765 (Print) 1873-4367 (Online)

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In this study, soil bacteria were isolated from nanomaterials (NMs) contaminated pond soil and enriched in the presence of graphene oxide (GO) in mineral medium to obtain NMs resistant bacteria. The isolated resistant bacteria were biochemically and genetically identified as Fontibacillus aquaticus. The resistant bacteria were allowed to interact with engineered GO in order to study the biotransformation in GO structure. Raman spectra of GO extracted from culture medium revealed decreased intensity ratio of ID/IG with subsequent reduction of Cdouble bond; length as m-dashO which was consistent with Fourier transform infrared (FTIR) results. The structural changes and exfoliatied GO nanosheets were also evident from transmission electron microscopy (TEM) images. Ultraviolet–visible spectroscopy, high resolution X-ray diffraction (XRD) and current-voltage measurements confirmed the reduction of GO after the interaction with resistant bacteria. X-ray photoelectron spectroscopy (XPS) analysis of biotransformed GO revealed reduction of oxygen-containing species on the surface of nanosheets. Our results demonstrated that the presented method is an environment friendly, cost effective, simple and based on green approaches for the reduction of GO using NMs resistant bacteria.
Item Type: Article
Uncontrolled Keywords: Graphene oxide; Biotransformation; Resistant bacteria; Nanomaterials
Subjects: T Technology > TP Chemical technology
Q Science > QD Chemistry
T Technology > TD Environmental technology. Sanitary engineering
Q Science > QR Microbiology
Divisions: Sabancı University Nanotechnology Research and Application Center
Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Faculty of Engineering and Natural Sciences > Basic Sciences > Physics
Faculty of Engineering and Natural Sciences
Depositing User: Javed Kolkar
Date Deposited: 04 Nov 2016 14:44
Last Modified: 22 May 2019 13:41

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