scholarly journals Controlled synthesis, characterization and reduction of graphene oxide: A convenient method for large scale production

2017 ◽  
Vol 4 (1) ◽  
pp. 74-79 ◽  
Author(s):  
Tarko Fentaw Emiru ◽  
Delele Worku Ayele
Keyword(s):  
Graphene Oxide ◽  
Convenient Method ◽  
Large Scale ◽  
Controlled Synthesis ◽  
Scale Production ◽  
Large Scale Production

Large-scale production of high-quality reduced graphene oxide

2013 ◽  
Vol 233 ◽  
pp. 297-304 ◽  
Author(s):  
Shichoon Lee ◽  
Sung Hun Eom ◽  
Jin Suk Chung ◽  
Seung Hyun Hur
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Large Scale ◽  
Scale Production ◽  
High Quality ◽  
Large Scale Production ◽  
Reduced Graphene

scholarly journals Novel Green Synthesis of Graphene Layers using Zante Currants and Graphene Oxide

2018 ◽  
Vol 34 (6) ◽  
pp. 2832-2837 ◽  
Author(s):  
Mohd Zaid Ansari ◽  
Mohammad Nadeem Lone ◽  
Shabana Sajid ◽  
Weqar Ahmad Siddiqui
Keyword(s):  
Graphene Oxide ◽  
Large Scale ◽  
Uv Spectrophotometry ◽  
Scale Production ◽  
Graphene Layers ◽  
Large Scale Production ◽  
Reduced Graphene ◽  
Reduction Effect ◽  
First Time ◽  
Facile Route

The present work shows a facile route for the preparation of graphene layers and for the first time Zante currants extract used for the effective deoxygenation of graphene oxide has been reported. Zante currants (ZC) extract reduce effectively GO into few layered structures of graphene (FLG). The morphology of few layers graphene and graphene oxide (GO) were investigated by SEM and TEM. Reduction effect on graphene oxide confirm by other technique like Raman, FTIR, XRD and UV spectrophotometry. This procedure keep away the use of hazardous chemicals, thus providing a new hope for large scale production of chemically reduced graphene.

scholarly journals A Green Approach for Highly Reduction of Graphene Oxide by Supercritical Fluid

2014 ◽  
Vol 1004-1005 ◽  
pp. 1013-1016 ◽  
Author(s):  
Chang Yi Kong ◽  
Yuuki Shiratori ◽  
Takeshi Sako ◽  
Futoshi Iwata
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Supercritical Fluid ◽  
Large Scale ◽  
Scale Production ◽  
Graphene Oxides ◽  
Practical Applications ◽  
Green Approach ◽  
Large Scale Production ◽  
Reduced Graphene

A green method to synthesize the reduced graphene oxide using supercritical fluid has been developed, which is an environmentally friendly and efficient route. The reduced graphene oxide has been examined by X-ray diffraction, Raman spectroscopy. We have also studied the effects of reduction temperatures and supercritical fluids on the electrical properties of reduced graphene oxide. It was found that ethanol has higher reducing capability than CO2at all temperatures (200 - 400°C) examined in this study for graphene oxide reduction. As a result, reduced graphene oxide (6300 S/m) from supercritical ethanol treatment has 5 times as high conductivity as that from supercritical CO2treatment at the reduction temperature of 400°C. This green process is applicable for large scale production of reduced graphene oxides for various practical applications.

Infrared ray assisted microwave synthesis: a convenient method for large-scale production of graphitic carbon nitride with outstanding nitrogen photofixation ability

RSC Advances ◽  
2016 ◽  
Vol 6 (51) ◽  
pp. 45931-45937 ◽  
Author(s):  
Shijun Li ◽  
Xin Chen ◽  
Shaozheng Hu ◽  
Qiang Li ◽  
Jin Bai ◽  
...  
Keyword(s):  
Visible Light ◽  
Convenient Method ◽  
Microwave Synthesis ◽  
Large Scale ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Microwave Method ◽  
Scale Production ◽  
Large Scale Production

A convenient infrared ray assisted microwave method for synthesizing graphitic carbon nitride (g-C3N4) with outstanding nitrogen photofixation ability under visible light is reported.

Simple approach for large-scale production of reduced graphene oxide films

2014 ◽  
Vol 243 ◽  
pp. 340-346 ◽  
Author(s):  
Ming Zhang ◽  
Bin Gao ◽  
Diana C. Vanegas ◽  
Eric S. McLamore ◽  
June Fang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Large Scale ◽  
Oxide Films ◽  
Simple Approach ◽  
Scale Production ◽  
Large Scale Production ◽  
Reduced Graphene

scholarly journals A Facile Method for Batch Preparation of Electrochemically Reduced Graphene Oxide

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 376 ◽  
Author(s):  
Yi-Fang Hung ◽  
Chia Cheng ◽  
Chun-Kai Huang ◽  
Chii-Rong Yang
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Reduction ◽  
Photoelectron Spectroscopy ◽  
Large Scale ◽  
Reduction Technique ◽  
Chemical Agent ◽  
Scale Production ◽  
Large Scale Production ◽  
Electrochemically Reduced Graphene Oxide ◽  
Π Stacking Interaction

The electrochemical reduction of graphene oxide (GO) is an environmentally friendly and energy-saving method for improving the characteristics of GO. However, GO films must be coated on the cathode electrode in advance when usingthis technique. Thus, the formed electrochemically reduced GO (ERGO) films can be used only as sensing or conductive materials in devices because mass production of the flakes is not possible. Therefore, this study proposes a facile electrochemical reduction technique. In this technique, GO flakes can be directly used as reduced materials, and no GO films are required in advance. A 0.1 M phosphate buffered saline solution was used as the electrolyte, which is a highly safe chemical agent. Experimental results revealed that the as-prepared GO flakes were electrochemically reduced to form ERGO flakes by using a −10 V bias for 8 h. The ratio of the D-band and G-band feature peaks was increased from 0.86 to 1.12, as revealed by Raman spectroscopy, the π-π stacking interaction operating between the ERGO and GO has been revealed by UV-Vis absorption spectroscopy, and the C–O ratio was increased from 2.02 to 2.56, as indicated by X-ray photoelectron spectroscopy. The electrical conductivity of the ERGO film (3.83 × 10−1 S·cm−1) was considerably better than that of the GO film (7.92 × 10−4 S·cm−1). These results demonstrate that the proposed electrochemical reduction technique can provide high-quality ERGO flakes and that it has potential for large-scale production.

scholarly journals Rapid synthesis and characterization of silver-loaded graphene oxide nanomaterials and their antibacterial applications

2021 ◽  
Vol 8 (2) ◽  
Author(s):  
Jiang Zhu ◽  
Haitao Ni ◽  
Chunyan Hu ◽  
Yuxiang Zhu ◽  
Jinxia Cai ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Large Scale ◽  
Structural Characteristics ◽  
Water Soluble ◽  
Scale Production ◽  
Energy Dispersion Spectroscopy ◽  
Gram Positive Bacteria ◽  
Transmission Electron ◽  
Large Scale Production

With the promising potential application of Ag/graphene-based nanomaterials in medicine and engineering materials, the large-scale production has attracted great interest of researchers on the basis of green synthesis. In this study, water-soluble silver/graphene oxide (Ag/GO) nanomaterials were synthesized under ultrasound-assisted conditions. The structural characteristics of Ag/GO were confirmed by Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, scanning electron microscopy and energy dispersion spectroscopy, respectively. The results showed the silver particles (AgNPs) obtained by reduction were attached to the surface of GO, and there was a strong interaction between AgNPs and GO. The antibacterial activity was primarily evaluated by the plate method and hole punching method. Antibacterial tests indicated that Ag/GO could inhibit the growth of Gram-negative and Gram-positive bacteria, special for the Staphylococcus aureus .

Supercapacitor Application of Powder Prepared Using the Hydrogenation Disproportionation Desorption and Recombination (HDDR) Process in Graphene Oxide

2017 ◽  
Vol 899 ◽  
pp. 347-352 ◽  
Author(s):  
Julio Cesar Serafim Casini ◽  
Antonio Paulo Rodrigues Fernandez ◽  
Rene Ramos de Oliveira ◽  
Solange Kazumi Sakata ◽  
Rubens Nunes de Faria Jr.
Keyword(s):  
Graphene Oxide ◽  
Large Scale ◽  
Cost Effective ◽  
Raw Material ◽  
Scale Production ◽  
X Ray Diffraction ◽  
Chemical Methods ◽  
Supercapacitor Application ◽  
Large Scale Production ◽  
Low Pressures

Graphene (G) has been attracted great interest for its excellent electrical properties. However, the large-scale production of graphene is presently unfeasible. Graphene oxide (GO) can be (partly) reduced to graphene-like sheets by removing the oxygen-containing groups with the recovery of a conjugated structure. It can be produced using inexpensive graphite as raw material by cost-effective chemical methods. Although hydrogen (mixed with argon) at high temperature (1100°C) has been employed to reduce GO powder, the hydrogenation disproportionation desorption and recombination (HDDR) process in particular was unreported for this purpose. In the present work, attempts of reducing GO powder using the HDDR process have been carried out and investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR). The experimental results of processing graphene oxide powder using unmixed hydrogen at moderate temperatures (about 850°C) and relatively low pressures (<2 bars) have been reported.

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