Crumpled reduced graphene oxide by flame-induced reduction of graphite oxide for supercapacitive energy storage

2014 ◽  
Vol 2 (16) ◽  
pp. 5730-5737 ◽  
Author(s):  
Yan-Zhen Liu ◽  
Cheng-Meng Chen ◽  
Yong-Feng Li ◽  
Xiao-Ming Li ◽  
Qing-Qiang Kong ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Reduced Graphene Oxide ◽  
Graphite Oxide ◽  
Reduction Method ◽  
Low Cost ◽  
Polar Solvents ◽  
Supercapacitive Performance ◽  
Efficient Energy ◽  
Reduced Graphene

Reduced graphene oxide powder was prepared by a flame-induced reduction method with the assist of flammable polar solvents. The new method is simple, efficient, energy saving, low-cost and scalable. As-prepared reduced graphene oxide displays excellent supercapacitive performance.

scholarly journals Preparation and Characterization of Reduced Graphene Oxide Sheets via Water-Based Exfoliation and Reduction Methods

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Vorrada Loryuenyong ◽  
Krit Totepvimarn ◽  
Passakorn Eimburanapravat ◽  
Wanchai Boonchompoo ◽  
Achanai Buasri
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Graphite Oxide ◽  
Low Cost ◽  
Graphite Powder ◽  
Chemical Oxidation ◽  
Distilled Water ◽  
Manufacturing Method ◽  
Ultrasound Frequency ◽  
Reduced Graphene

This research studied the synthesis of graphene oxide and graphene via a low-cost manufacturing method. The process started with the chemical oxidation of commercial graphite powder into graphite oxide by modified Hummer’s method, followed by the exfoliation of graphite oxide in distilled water using the ultrasound frequency from a laboratory ultrasonic bath. Finally, the oxygen functional groups on exfoliated graphite oxide or graphene oxide were eliminated by stirring in hot distilled water at 95°C, as a replacement for highly toxic and dangerously unstable hydrazine. The results assured that stirring in hot distilled water could give the product of graphene or reduced graphene oxide. The samples were characterized by FTIR, XRD, TGA, Raman spectroscopy, SEM, and TEM methods.

High-concentration ether-based electrolyte boosts the electrochemical performance of SnS2–reduced graphene oxide for K-ion batteries

2019 ◽  
Vol 7 (33) ◽  
pp. 19332-19341 ◽  
Author(s):  
Junpeng Xie ◽  
Yongqian Zhu ◽  
Ning Zhuang ◽  
Xiaodan Li ◽  
Xinran Yuan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Electrochemical Performance ◽  
Reduced Graphene Oxide ◽  
Storage Systems ◽  
Low Cost ◽  
Li Ion Batteries ◽  
High Concentration ◽  
Reduced Graphene ◽  
Li Ion

To meet the urgent demand for energy storage systems, K-ion batteries (KIBs), with low cost and comparable electrochemical performance, have become one of the most promising alternatives to Li-ion batteries.

Iodine doped composite with biomass carbon dots and reduced graphene oxide: a versatile bifunctional electrode for energy storage and oxygen reduction reaction

2019 ◽  
Vol 7 (39) ◽  
pp. 22650-22662 ◽  
Author(s):  
Van Chinh Hoang ◽  
Khang Ngoc Dinh ◽  
Vincent G. Gomes
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Oxygen Reduction Reaction ◽  
Reduced Graphene Oxide ◽  
Carbon Dots ◽  
Low Cost ◽  
Reduction Reaction ◽  
Biomass Carbon ◽  
Synthetic Route ◽  
Reduced Graphene

We prepared carbon dots (CDs) via a sustainable, low-cost synthetic route employing eggplant biomass.

scholarly journals Graphene Oxide: A Smart (Starting) Material for Natural Methylxanthines Adsorption and Detection

Molecules ◽  
2019 ◽  
Vol 24 (23) ◽  
pp. 4247 ◽  
Author(s):  
Rita Petrucci ◽  
Isabella Chiarotto ◽  
Leonardo Mattiello ◽  
Daniele Passeri ◽  
Marco Rossi ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Nucleic Acids ◽  
Reduced Graphene Oxide ◽  
Electrochemical Sensors ◽  
Enzymatic Digestion ◽  
Biologically Active ◽  
Polar Solvents ◽  
Dna And Rna ◽  
Reduced Graphene

Natural methylxanthines, caffeine, theophylline and theobromine, are widespread biologically active alkaloids in human nutrition, found mainly in beverages (coffee, tea, cocoa, energy drinks, etc.). Their detection is thus of extreme importance, and many studies are devoted to this topic. During the last decade, graphene oxide (GO) and reduced graphene oxide (RGO) gained popularity as constituents of sensors (chemical, electrochemical and biosensors) for methylxanthines. The main advantages of GO and RGO with respect to graphene are the easiness and cheapness of synthesis, the notable higher solubility in polar solvents (water, among others), and the higher reactivity towards these targets (mainly due to – interactions); one of the main disadvantages is the lower electrical conductivity, especially when using them in electrochemical sensors. Nonetheless, their use in sensors is becoming more and more common, with the obtainment of very good results in terms of selectivity and sensitivity (up to 5.4 × 10−10 mol L−1 and 1.8 × 10−9 mol L−1 for caffeine and theophylline, respectively). Moreover, the ability of GO to protect DNA and RNA from enzymatic digestion renders it one of the best candidates for biosensors based on these nucleic acids. This is an up-to-date review of the use of GO and RGO in sensors.

Reduced graphene oxide/polyaniline wrapped carbonized sponge with elasticity for energy storage and pressure sensing

2021 ◽  
Author(s):  
Shichao Huang ◽  
Jialun Li ◽  
Xueyu Zhang ◽  
Xijia Yang ◽  
Liying Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Reduced Graphene Oxide ◽  
Pressure Sensing ◽  
Reduced Graphene

Reduced graphene oxide/polyaniline wrapped carbonized sponge with elasticity for energy storage and pressure sensing.

Ternary Nanocomposites of Reduced Graphene Oxide, Polyaniline, and Iron Oxide Applied for Energy Storage

2021 ◽  
Author(s):  
Vitor H. N. Martins ◽  
Nicolás M. S. Siqueira ◽  
Jéssica E. S. Fonsaca ◽  
Sergio H. Domingues ◽  
Victor H. R. Souza
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Iron Oxide ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene
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