scholarly journals A Two-Step Method for Stable and Impurity-Free Graphene Oxide Dispersion in Various Organic Solvents without a Stabilizer or Chemical Modification

2019 ◽  
Vol 92 (3) ◽  
pp. 511-520 ◽  
Author(s):  
Kazuto Hatakeyama ◽  
Michio Koinuma ◽  
Yoshiki Shimizu ◽  
Yukiya Hakuta
Keyword(s):  
Graphene Oxide ◽  
Chemical Modification ◽  
Organic Solvents ◽  
Oxide Dispersion ◽  
Step Method ◽  
Free Graphene

A Disposable and Flexible Graphene Electrode Fabricated by Inkjet Printing of an Aqueous Surfactant-free Graphene Oxide Dispersion

2015 ◽  
Vol 44 (6) ◽  
pp. 800-802 ◽  
Author(s):  
Chamari Pothipor ◽  
Nawee Kungwan ◽  
Jaroon Jakmunee ◽  
Kontad Ounnunkad
Keyword(s):  
Graphene Oxide ◽  
Inkjet Printing ◽  
Oxide Dispersion ◽  
Graphene Electrode ◽  
Free Graphene

Synthesis and Electrochemical Properties of NiFe-Se/rGO Nanocomposites

2020 ◽  
Vol 13 ◽  
Author(s):  
Rouwei Yan ◽  
Biao Xu ◽  
K. P. Annamalai ◽  
Tianlu Chen ◽  
Zhiming Nie ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Energy Storage ◽  
Synergistic Effects ◽  
Nitrogen Adsorption ◽  
Storage Device ◽  
Energy Storage And Conversion ◽  
Step Method ◽  
Practical Applications ◽  
Device Applications

Background : Renewable energies are in great demand because of the shortage of traditional fossil energy and the associated environmental problems. Ni and Se-based materials are recently studied for energy storage and conversion owing to their reasonable conductivities and enriched redox activities as well as abundance. However, their electrochemical performance is still unsatisfactory for practical applications. Objective: To enhance the capacitance storage of Ni-Se materials via modification of their physiochemical properties with Fe. Methods: A two-step method was carried out to prepare FeNi-Se loaded reduced graphene oxide (FeNi-Se/rGO). In the first step, metal salts and graphene oxide (GO) were mixed under basic condition and autoclaved to obtain hydroxide intermediates. As a second step, selenization process was carried out to acquire FeNi-Se/rGO composites. Results: X-ray diffraction measurements (XRD), nitrogen adsorption at 77K, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were carried out to study the structures, porosities and the morphologies of the composites. Electrochemical measurements revealed that FeNi-Se/rGO notably enhanced capacitance than the NiSe/G composite. This enhanced performance was mainly attributed to the positive synergistic effects of Fe and Ni in the composites, which not only had influence on the conductivity of the composite but also enhanced redox reactions at different current densities. Conclusion: NiFe-Se/rGO nanocomposites were synthesized in a facile way. The samples were characterized physicochemically and electrochemically. NiFeSe/rGO giving much higher capacitance storage than the NiSe/rGO explained that the nanocomposites could be an electrode material for energy storage device applications.

Graphene oxide dispersion state in polystyrene-based composites below percolation threshold via linear melt rheology

2021 ◽  
Vol 60 (4) ◽  
pp. 209-218
Author(s):  
Claudia Dessi ◽  
Leice G. Amurin ◽  
Pablo A. R. Muñoz ◽  
Yuri D. C. de Oliveira ◽  
Guilhermino J. M. Fechine ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Percolation Threshold ◽  
Oxide Dispersion ◽  
Melt Rheology ◽  
Dispersion State

Direct Synthesis of Hydrophobic Graphene-Based Nanosheets via Chemical Modification of Exfoliated Graphene Oxide

2012 ◽  
Vol 12 (8) ◽  
pp. 6460-6466 ◽  
Author(s):  
Jigang Wang ◽  
Yongsheng Wang ◽  
Dawei He ◽  
Zhiyong Liu ◽  
Hongpeng Wu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Chemical Modification ◽  
Direct Synthesis ◽  
Exfoliated Graphene

Virus Capture and Destruction by Label-Free Graphene Oxide for Detection and Disinfection Applications

Small ◽  
2014 ◽  
Vol 11 (9-10) ◽  
pp. 1171-1176 ◽  
Author(s):  
Zhiyong Song ◽  
Xiaoyu Wang ◽  
Genxing Zhu ◽  
Qinggong Nian ◽  
Hangyu Zhou ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Label Free ◽  
Free Graphene

scholarly journals One-Step Preparation of Hyperbranched Polyether Functionalized Graphene Oxide for Improved Corrosion Resistance of Epoxy Coatings

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 844 ◽  
Author(s):  
Xuepei Miao ◽  
An Xing ◽  
Lifan He ◽  
Yan Meng ◽  
Xiaoyu Li
Keyword(s):  
Corrosion Resistance ◽  
Graphene Oxide ◽  
Acid Resistance ◽  
Epoxy Coating ◽  
Functionalized Graphene ◽  
Step Method ◽  
Epoxy Coatings ◽  
Functionalized Graphene Oxide ◽  
One Step ◽  
Hyperbranched Polyether

In this paper, hyperbranched polyether functionalized graphene oxide (EHBPE-GO) was prepared by a facile one-step method. Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), thermogravimetric analyzer (TGA), and trans-mission electron microscopy (TEM) results confirmed the formation of EHBPE-GO. Then, EHBPE-GO was cured with phenolic amides at room temperature to prepare epoxy coatings. The corrosion resistance of epoxy coatings was investigated systematically by using electrochemical and traditional immersion methods. Results show that a small amount of EHBPE-GO (8 wt % of Diglycidyl ether of bisphenol A (DGEBA)) in epoxy coating achieves 50% higher improvement in acid-resistance than unmodified neat DGEBA resin. For the nanocomposite epoxy coating, the superior acid-resistance is attributed to the increased crosslink density and the impermeable 2D structure of EHBPE-GO. This work provides a facile strategy to develop the effective improved corrosion resistance nanofiller for epoxy coating.

Study on the Absorption Coefficient of Reduced Graphene Oxide Dispersion

2014 ◽  
Vol 118 (23) ◽  
pp. 12520-12525 ◽  
Author(s):  
Rui Su ◽  
Shao Fen Lin ◽  
Dan Qing Chen ◽  
Guo Hua Chen
Keyword(s):  
Graphene Oxide ◽  
Absorption Coefficient ◽  
Reduced Graphene Oxide ◽  
Oxide Dispersion ◽  
Reduced Graphene

A Flexible, Binder-Free Graphene Oxide/Copper Sulfides Film for High-Performance Sodium Ion Batteries

2018 ◽  
Vol 3 (20) ◽  
pp. 5608-5613 ◽  
Author(s):  
Wen Liu ◽  
Bin Shi ◽  
Yong Wang ◽  
Yong Li ◽  
Haijuan Pei ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
High Performance ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Copper Sulfides ◽  
Free Graphene ◽  
Binder Free
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