scholarly journals Lemon Juice Assisted Green Synthesis of Reduced Graphene Oxide and Its Application for Adsorption of Methylene Blue

Technologies ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 96
Author(s):  
Md. Mahiuddin ◽  
Bungo Ochiai
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Large Scale ◽  
Carbon Nanomaterials ◽  
Cost Effective ◽  
Lemon Juice ◽  
Scale Production ◽  
Reduced Graphene ◽  
Microscopic Evaluation

Sustainable synthesis of reduced graphene oxide (rGO) is of crucial significance within the development of carbon nanomaterials. In this study, a green and eco-friendly strategy for the synthesis of rGO using lemon juice as the reducing agent for graphene oxide (GO) without using toxic and harmful chemicals was demonstrated. The reduction with lemon juice effectively eliminated the oxygen-containing functionalities of GO and regenerated the conjugated systems as confirmed by the UV-vis and FTIR spectroscopic and X-ray diffraction analyses. Microscopic evaluation showed the successful manufacturing of exfoliated and separated few layers of nano-sheets of rGO. The application of the resultant rGO as an adsorbent for organic pollutants was investigated using methylene blue (MB) as a model. The adsorption kinetics of MB on rGO is best matched with the pseudo-second-ordered kinetic model and the Langmuir model with a high adsorption capacity of 132.2 mg/g. The rGO exhibited good reusability with a removal efficiency of 80.4% in the fourth cycle. This green method provides a new prospect for the large-scale production of rGO in a cost-effective and safe manner.

scholarly journals Investigation of the Reduction of Graphene Oxide by Lithium Triethylborohydride

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Guangyuan Xu ◽  
Jenny Malmström ◽  
Neil Edmonds ◽  
Neil Broderick ◽  
Jadranka Travas-Sejdic ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Large Scale ◽  
Chemical Reduction ◽  
Colloidal Suspension ◽  
Cost Effective ◽  
Scale Production ◽  
Large Scale Production ◽  
Reduced Graphene ◽  
Ft Ir

The chemical reduction of a wet colloidal suspension of graphene oxide is a cost-effective and adaptable method for large scale production of “quasi” graphene for a wide variety of optoelectronic applications. In this study, modified Hummers’ procedure was used to synthesize high quality graphene oxide at 50°C. This modified protocol thus eliminates the potentially hazardous second high-temperature step in Hummers’ method for the production of GO. Furthermore, the reduction of graphene oxide by lithium triethylborohydride is demonstrated for the first time. According to FT-IR, UV-Vis, TGA, Raman, SEM/EDS, and AFM results, the reduced graphene oxide (LiEt3BH-RGO) has properties comparable to other reduced graphene oxide products reported in the literature.

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 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.

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

PRODUCTION OF STABLE DISPERSIONS OF REDUCED GRAPHENE OXIDE USING INDOLE AS A REDUCTION AGENT

NANO ◽  
2013 ◽  
Vol 08 (02) ◽  
pp. 1350017 ◽  
Author(s):  
YING HUANG ◽  
PANBO LIU ◽  
LEI WANG
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Photoelectron Spectroscopy ◽  
Large Scale ◽  
Analytical Techniques ◽  
Cost Effective ◽  
Reducing Agent ◽  
X Ray ◽  
Force Microscopy ◽  
Reduced Graphene

Stable dispersions of reduced graphene oxide (RGO) have been prepared by indole as a previously unreported reducing agent without employing any external stabilizing reagents. The obtained RGO can be individually dispersed in ethanol, N, N-dimethylformamide (DMF), N-methylpyrrolidone (NMP), dimethylsulfoxide (DMSO), tetrahydrofuran (THF) and isopropanol. Several analytical techniques including Atomic force microscopy, X-ray diffraction, UV-Vis spectra, Raman spectroscopy and X-ray photoelectron spectroscopy indicate that a significant fraction of the oxygen-containing functional groups are removed, yields a C/O ratio as high as 7.4. The conductivity of RGO is 21.2 S/m and the thickness of RGO increases to 1.7 nm. Furthermore, this new reducing agent is of low toxicity, which makes the reduction much safer than hydrazine and this method is cost-effective to produce single-layered RGO on a large scale.

A Green Approach to the Synthesis of Reduced Graphene Oxide using Sodium Humate

2016 ◽  
Vol 230 (12) ◽  
Author(s):  
Ning Xiang ◽  
Jiguo Huang ◽  
Honggang Zhao ◽  
Chengjia Liu ◽  
Xingjuan Liu
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Large Scale ◽  
Scale Production ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sodium Humate ◽  
Green Approach ◽  
Large Scale Production ◽  
Reduced Graphene

AbstractA green and simple chemistry approach was demonstrated to prepare reduced graphene oxide (rGO) using sodium humate (SH) as the reducing agent. Without using toxic and harmful chemicals, this method is environmentally friendly and suitable for the large-scale production of graphene. At first, the improved Hummers method to oxidize graphite for the synthesis of graphene oxide (GO) was applied, and then the as-prepared GO was reduced by SH to form rGO. Characterization was performed using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectrometry (XPS) and Raman spectra. The intensity ratio of the D and G band (I

Large scale production of highly conductive reduced graphene oxide sheets by a solvent-free low temperature reduction

Carbon ◽  
2014 ◽  
Vol 69 ◽  
pp. 327-335 ◽  
Author(s):  
Kyu Hyung Lee ◽  
Byeongno Lee ◽  
Son-Jong Hwang ◽  
Jae-Ung Lee ◽  
Hyeonsik Cheong ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Low Temperature ◽  
Reduced Graphene Oxide ◽  
Large Scale ◽  
Solvent Free ◽  
Scale Production ◽  
Temperature Reduction ◽  
Large Scale Production ◽  
Reduced Graphene ◽  
Graphene Oxide Sheets
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