Few-layer graphene oxide with high yield via efficient surfactant-assisted exfoliation of mildly-oxidized graphite

2019 ◽  
Vol 494 ◽  
pp. 1100-1108 ◽  
Author(s):  
Yang Hu ◽  
Min Su ◽  
Xin Xie ◽  
Chunbao Sun ◽  
Jue Kou
Keyword(s):  
Graphene Oxide ◽  
High Yield ◽  
Layer Graphene ◽  
Oxidized Graphite ◽  
Few Layer Graphene ◽  
Surfactant Assisted

Facile Synthesis of Few-Layer Graphene Oxide from Cinnamomum camphora

2021 ◽  
Vol 16 (2) ◽  
pp. 183-187
Author(s):  
Athiyanam Venkatesan Ramya ◽  
Neethu Joseph ◽  
Manoj Balachandran
Keyword(s):  
Graphene Oxide ◽  
Cinnamomum Camphora ◽  
Facile Synthesis ◽  
Layer Graphene ◽  
Few Layer Graphene

scholarly journals High yield production and purification of few layer graphene by Gum Arabic assisted physical sonication

2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Victor Chabot ◽  
Brian Kim ◽  
Brent Sloper ◽  
Costas Tzoganakis ◽  
Aiping Yu
Keyword(s):  
Gum Arabic ◽  
High Yield ◽  
Layer Graphene ◽  
Yield Production ◽  
Few Layer Graphene ◽  
High Yield Production

scholarly journals Few-layer-graphene with high yield and low sheet resistance via mild oxidation of natural graphite

RSC Advances ◽  
2017 ◽  
Vol 7 (57) ◽  
pp. 35717-35723 ◽  
Author(s):  
S. Kim ◽  
J. Y. Lee ◽  
T. H. Yoon
Keyword(s):  
Sheet Resistance ◽  
Oxidation Time ◽  
Oxidation Temperature ◽  
High Yield ◽  
Mild Oxidation ◽  
Natural Graphite ◽  
Hummers Method ◽  
Layer Graphene ◽  
Few Layer Graphene ◽  
Modified Hummers Method

The mild oxidation of natural graphite was obtained via the modified Hummers method by employing an oxidation temperature of 20 °C and KMnO4 loading of 2 g, while varying the oxidation time from 30 to 60, 90 or 120 min.

Oil Lubricant Tribological Behaviour Improvement Through Dispersion of Few Layer Graphene Oxide

2014 ◽  
Vol 14 (7) ◽  
pp. 4960-4968 ◽  
Author(s):  
Maria Sarno ◽  
Adolfo Senatore ◽  
Claudia Cirillo ◽  
Vincenzo Petrone ◽  
Paolo Ciambelli
Keyword(s):  
Graphene Oxide ◽  
Tribological Behaviour ◽  
Layer Graphene ◽  
Few Layer Graphene

scholarly journals Green Exfoliation of Graphite Flakes to Efficiently Synthesize Biographene

2019 ◽  
Author(s):  
Noelia Losada-Garcia ◽  
Angel Berenguer-Murcia ◽  
Diego Cazorla-Amorós ◽  
Jose M Palomo
Keyword(s):  
Graphene Oxide ◽  
Experimental Analysis ◽  
Low Cost ◽  
Bilayer Graphene ◽  
Thermomyces Lanuginosus ◽  
Graphene Sheets ◽  
Hydrophobic Surfaces ◽  
Layer Graphene ◽  
Mechanism Of Interaction ◽  
Few Layer Graphene

<p>A new simple, rapid, and efficient methodology to produce undamaged graphene sheets from graphite flakes in water by a bio-exfoliation technology is described. The methodology consists in the application of a lipase, with a very exclusive mechanism of interaction with hydrophobic surfaces, combined with a previous mechanical sonication, to selectively generate biographene in water. The adsorption of the lipase on the graphene sheets permits to keep the sheets separated in comparison with other methods. It is possible to obtain more than 80% of graphene (in the form of Few Layer Graphene) from low-cost graphite and with less damage compared to commercial graphene oxide (GO) or reduced GO. Experimental analysis demonstrated the formation of bilayer graphene mainly using lipase from Thermomyces lanuginosus (TLL).</p>

Understanding Gas Transport Behavior through Few-Layer Graphene Oxide Membranes Controlled by Tortuosity and Interlayer Spacing

2019 ◽  
Vol 10 (24) ◽  
pp. 7725-7731 ◽  
Author(s):  
Ji Soo Roh ◽  
Tae Hwan Choi ◽  
Tae Hoon Lee ◽  
Hee Wook Yoon ◽  
Juyoung Kim ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Gas Transport ◽  
Interlayer Spacing ◽  
Layer Graphene ◽  
Transport Behavior ◽  
Few Layer Graphene ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

Synthesis and Characterization of Graphene Sheets from Graphite through Electrochemical Exfoliation and Microwave Reduction

2021 ◽  
Vol 875 ◽  
pp. 127-137
Author(s):  
Arshad Hussain Wazir ◽  
Imran Waseem Kundi ◽  
Wahib Noor Khan ◽  
Abdul Manan ◽  
Imdadullah Querashi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Microwave Irradiation ◽  
Uv Spectra ◽  
High Yield ◽  
Graphene Sheets ◽  
X Ray ◽  
Force Microscopy ◽  
Exfoliated Graphene ◽  
The Difference ◽  
Few Layer Graphene

Graphene as a wonder material has received great attention and importance due to its fascinating properties. Here in this study, we also demonstrate a simple two step process to prepare graphene sheets (GSs) from the electrochemical exfoliated graphene oxide (EE-GO) followed by microwave irradiation reduction. The properties and structure of the resulted product samples were studied by Ultraviolet spectroscopy (UV), Fourier-transform infrared spectroscopy (FTIR), Thermogravimetric analysis (TGA), X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy-dispersive X-ray (EDX or EDS), Raman spectroscopy and Atomic force microscopy (AFM) for validation of their distinguishing characteristics. UV spectra of microwave irradiation reduced graphene oxide (MI-RGO) and EE-GO exhibited an intense and sharp absorption peak concentrated at wavelengths of 236 and 266nm, respectively. The elimination of oxygen functionalities present in the EE-GO plane was illustrated by FTIR as a result of microwave irradiation treatment. The relative layer structures of MI-RGO and EE-GO were confirmed by XRD. Similarly, the Raman spectra revealed the difference in between the EE-GO and MI-RGO characteristic reflection bands. The thin, crumpled and curved type morphology of the obtained graphene sheets (GSs) was also displayed by SEM while the composition of a few layer graphene sheets with atomic mass percents of carbon (75%) and oxygen (25%) was established by EDX. The Synthesis procedure is simple, rapid and eco-friendly with high yield.

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