Chemical reducing and capping reagents are largely used in synthesizing metal oxide nanoparticles which limits the biomedical applications. Researchers have recently found out the eco-friendly technique of green synthesis which enhances the unique physical and chemical properties of nanomaterials. In this critique, we discuss green route to synthesize metal oxide nanoparticles and its significant applications in various fields of energy and environment, aerospace, medicine, biotechnology, etc.This study arouses to provoke new research design of approach to synthesize nanoparticles for various technological applications. In this review, most of the metal oxides nanoparticles with different plant extract with enhanced properties for its potential applications are discussed which confirms plant extracts as a potential candidate to be used as reducing and capping agent.

Vinitha G

Physics

School of Advanced Sciences

Chennai Campus

Manikandan N

Department of Software and Systems Engineering

School of Information Technology and Engineering

Vellore Campus

Vani P

Fulltext

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Asian Journal of Pharmaceutical and Clinical Research

A green one step facile synthesis of graphene nanosheets by Terminalia chebula (T. chebula) extract mediated reduction of graphite oxide (GO) is reported in this work. This method avoids the use of harmful toxic reducing agents. The comparative results of various characterizations of GO and T. chebula reduced graphene oxide (TCG) provide a strong indication of the exclusion of oxygen containing groups from graphene oxide and successive stabilization of the formed reduced graphene oxide (RGO). The functionalization of reduced graphene oxide with the oxidized polyphenols causes their stability by preventing the aggregation. We also have proposed how the oxidized polyphenols are accountable for the stabilization of the formed graphene sheets. © 2015 Elsevier B.V. All rights reserved.

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Bioinspired reduced graphene oxide nanosheets using Terminalia chebula seeds extract

Nanosized materials have been an important subject in basic and applied sciences. A novel, low-cost, green and reproducible bacteria, Aeromonas hydrophila mediated biosynthesis of titanium dioxide nanoparticles (TiO 2 NPs) was reported. The resulting nanoparticles were characterized by FTIR, XRD, AFM and FESEM with EDX. FTIR showed characteristic bands (1643 and 3430 cm-1) finds the role of carboxyl group OH stretching amine NH stretch in the formation of TiO2 NPs. The XRD spectrum confirmed that the synthesized TiO2 NPs were in the form of nanocrystals, as evidenced by the peaks at 2θ values of 27.47°, 31.77°, 36.11°, 41.25°, 54.39°, 56.64° and 69.54° were identified as 110, 100, 101, 111, 211, 220 and 301 reflections, respectively. The crystallite sizes were calculated using Scherrer's formula applied to the major intense peaks and found to be the size of 40.50 nm. The morphological characterization was analyzed by FESEM and the analysis showed the NPs smooth shaped, spherical and uneven. GC-MS analysis showed the main compounds found in A. hydrophila were uric acid (2.95%), glycyl-l-glutamic acid (6.90%), glycyl-l-proline (74.41%) and l-Leucyl-d-leucine (15.74%). The potential glycyl-l-proline could have played an important role as a capping agent. A possible mechanism for the biosynthesis of TiO2 NPs has been proposed. The antibacterial activity of the synthesized TiO2 NPs was assessed by well diffusion method toward A. hydrophila, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Streptococcus pyogenes and Enterococcus faecalis and showed effective inhibitory activity against S. aureus (33 mm) and S. pyogenes (31 mm). © 2013 Elsevier B.V. All rights reserved.

Biological approach to synthesize TiO2 nanoparticles using Aeromonas hydrophila and its antibacterial activity

Retraction notice to “Green synthesis of Zinc oxide nanoparticles using Moringa oleifera leaf extract and evaluation of its antimicrobial activity” [Spectrochim. Acta A Mol. Biomol. Spectrosc. 143 (2015) 158-164]

Journal of Saudi Chemical Society

Biofabrication of copper oxide nanoparticles using Andean blackberry (Rubus glaucus Benth.) fruit and leaf

Saudi Journal of Biological Sciences

Biosynthesis and antibacterial activity of ZnO nanoparticles using Trifolium pratense flower extract

A GREEN STRATEGY TO SYNTHESIZE ENVIRONMENT FRIENDLY METAL OXIDE NANOPARTICLES FOR POTENTIAL APPLICATIONS – A REVIEW

Journal	Asian Journal of Pharmaceutical and Clinical Research
Publisher	Innovare Academic Sciences Pvt Ltd
ISSN	0974-2441
Open Access	Yes