Cover Page January-2019-Advanced Materials Letters

Advanced Materials Letters

Volume 10, Issue 1, Pages 58-66, January 2019
About Cover

The cover photo describes the graphical representation of a wearable device. Recently, the interest in wearable devices is rapidly growing with its wide applications in the wide area of disease detection and monitoring, wellness monitoring, implantable electronics, military operations etc.


Onion juice assisted green reduction of graphene oxide with tunable structural and optical properties: Effect of onion juice concentration and reaction temperature

Sumeet Kumar1, Dipjyoti Bhorolua1, Animesh K. Ojha2, Ashok Kumar1*

1Department of Physics, Tezpur University, Tezpur 784028 Assam, India

2Department of Physics, Motilal Nehru National Institute of Technology, Allahabad 211004, Uttar Pradesh, India

Adv. Mater. Lett., 2019, 10 (1), pp 58-66

DOI: 10.5185/amlett.2019.2124

Publication Date (Web): Dec 10, 2018

E-mail: ask@tezu.ernet.in

Abstract

In most of the studies, toxic and harmful reducing agents were used for the chemical reduction of graphene oxide (GO) and into reduced graphene oxide (rGO). Here, onion juice is used as a natural and green reducing agent for the reduction of GO into rGO. The effect of onion juice concentration and reaction temperature on the reduction ability of onion juice have been studied. The present synthesis approach avoids the use of toxic and harmful chemicals for reduction of GO. The mechanism of reduction of GO at various concentrations of onion juice is explained in terms of presence of cysteine in the onion juice as one of the chemical constituents. The X-ray diffraction (XRD) results revealed the high degree of reduction with superior quality. Transmission electron microscopy (TEM) images provide clear evidence for the formation of transparent and thin layers of graphene. We have extended our analysis to reveal the quality of rGO produced by onion juice assisted reduction of GO using D, G and 2D bands present in the Raman spectra. Moreover, we have discussed the role of onion juice concentration and reaction temperature on evolution of D and G bands and ID/IG ratio, which in turn tell the overall growth of graphene sheet.  Fourier transforms infrared spectroscopy (FTIR) measurements also show significant degree of reduction of GO. The UV-Vis. absorption spectrum further confirms the ability of onion juice to reduce GO into rGO. The synthesized product shows good dispersibility in aqueous solvent. Thus, the present report provides a green and facile approach for the synthesis of graphene derivatives with enormous potential. 

Keywords

Green reduction of GO, onion juice concentration, reaction temperature, degree of reduction.

Current Issue

Cloud Medicine set to Revolutionize Doorstep Personalized Healthcare


Various surfactants for 0 – 3 dimensional nanocarbons: Separation, exfoliation and solubilization


Polypyrrole based biofunctional composite layer for bioelectrocatalytic device system


Innovative Graphene-PDMS sensors for aerospace applications 


Effect of hot drawing process and carbonization temperature in electrochemical behavior of electrospun carbon nanofibers


Chemical Reactivity and Electronical Properties of Graphene and Reduced Graphene Oxide on Different Substrates


Laser Raman micro-spectroscopy as an effective non-destructive method of detection and identification of various sp2 carbon modifications in industry and in nature


Electrochemical promotion of ammonia synthesis with proton-conducting solid oxide fuel cells


Biomimetic surfaces with hierarchical structure using microsized texture and nanosized Cu particles for superhydrophobicity


Enhancement the properties of high and low-density polyethylene membranes by radiation grafting process


Synthesis of 9-Aminoacridine and its Application as an Anode Material for Aqueous Rechargeable Lithium–ion Batteries


Facile synthesis of novel tough and highly flexible biodegradable membranes for water microfiltration


Investigating the possibility of using acetic acid in place of HF in chromium-benzenedicarboxylates (MIL-53 and MIL-101) synthesis applicable for CO2 adsorption


Previous issues

Smart Healthcare pulls up Clouds for Virtual Medicine

Selecting the correct electromagnetic inspection technology 

Influence of railway-track grinding on the track material condition and tribological behaviour

Micromechanical Fatigue Modelling of the Size Effect in Micro-Scale 316L Stainless Steel Specimens

Functionalization of Graphene and Reduced Graphene Oxide in Different Matrices

Effect of parasitic polytypes on ballistic electron transport in chemical vapor deposition grown 6H-SiC epitaxial layers

Photomemristive heterostructures based on two-dimensional crystals

Architecture - behaviour - properties relationship in Star-shaped MPA-PMMA and MPA-PS hyper-branched copolymers

Graphene and doped graphene: A comparative DFT study

Ag2CO3 / Magnetic reduced graphene oxide nanocomposite as advanced visible light photocatalytic hybrid materials for efficient degradation of azo dye

Optimization of acid hydrolysis process for the preparation cellulose nanofibrils

Alginate/k-carrageenan and alginate/gelatin composite hydrogel beads for controlled drug release of curcumin

Study of microstructure and mechanical properties of friction stir welded ferrite-martensite DP700 steel

Upcoming Congress

Knowledge Experience at Sea TM