scholarly journals Pulse electrochemical synthesis of polypyrrole/graphene oxide@graphene aerogel for high-performance supercapacitor

RSC Advances ◽  
2020 ◽  
Vol 10 (20) ◽  
pp. 11966-11970
Author(s):  
Erhui Zhang ◽  
Weifeng Liu ◽  
Xuguang Liu ◽  
Zongbin Zhao ◽  
Yongzhen Yang
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Synthesis ◽  
High Performance ◽  
Graphene Aerogel ◽  
Capacitive Performance

The as-prepared polypyrrole/graphene oxide@graphene aerogel by pulse electropolymerization technique presents excellent capacitive performance.

Reduced graphene oxide nanosheet modified NiMn-LDH nanoflake arrays for high-performance supercapacitors

2018 ◽  
Vol 54 (72) ◽  
pp. 10172-10175 ◽  
Author(s):  
Li Sun ◽  
Yuanxing Zhang ◽  
Yu Zhang ◽  
Haochen Si ◽  
Wenpeng Qin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Graphene Oxide Nanosheets ◽  
Ni Foam ◽  
Capacitive Performance ◽  
Array Electrode ◽  
Reduced Graphene ◽  
Graphene Oxide Nanosheet

Reduced graphene oxide nanosheets are used to modify a Ni foam-supported NiMn-LDH nanoflake array electrode, showing enhanced capacitive performance.

scholarly journals Self-assembled graphene aerogel and nanodiamond hybrids as high performance catalysts in oxidative propane dehydrogenation

2015 ◽  
Vol 3 (48) ◽  
pp. 24379-24388 ◽  
Author(s):  
Laura Roldán ◽  
Ana M. Benito ◽  
Enrique García-Bordejé
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Method ◽  
Oxidative Dehydrogenation ◽  
Self Assembly ◽  
High Performance ◽  
High Dispersion ◽  
Oxide Dispersion ◽  
Oxidative Dehydrogenation Of Propane ◽  
Graphene Aerogel ◽  
Mild Reduction

Graphene aerogels and graphene aerogel–nanodiamond hybrids have been fabricated by a mild reduction/self-assembly hydrothermal method using graphene oxide dispersion as a precursor. The high dispersion of nanodiamonds enhances the performance in oxidative dehydrogenation of propane.

Graphene aerogel supported Fe5(PO4)4(OH)3·2H2O microspheres as high performance cathode for lithium ion batteries

2014 ◽  
Vol 2 (17) ◽  
pp. 6174-6179 ◽  
Author(s):  
Sheng Han ◽  
Jinzuan Wang ◽  
Shuang Li ◽  
Dongqing Wu ◽  
Xinliang Feng
Keyword(s):  
Graphene Oxide ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Graphene Aerogel ◽  
Hydrothermal Mineralization ◽  
Phosphate Dihydrate

Three-dimensional (3D) macroporous graphene aerogel-supported Fe5(PO4)4(OH)3·2H2O (iron(iii) hydroxide phosphate dihydrate) microspheres (GA/IHPDs) have been fabricated by the hydrothermal mineralization of Fe3+ and PO43− ions in the presence of graphene oxide (GO).

scholarly journals Novel π-conjugated iron oxide/reduced graphene oxide nanocomposites for high performance electrochemical supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (1) ◽  
pp. 327-335 ◽  
Author(s):  
Gourav Bhattacharya ◽  
Ganeshlenin Kandasamy ◽  
Navneet Soin ◽  
Ravi Kant Upadhyay ◽  
Sujit Deshmukh ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Iron Oxide ◽  
Specific Capacitance ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Cyclic Stability ◽  
Electrochemical Supercapacitors ◽  
Capacitive Performance ◽  
Reduced Graphene

Nanocomposite of π-conjugated 2-aminoterephthalic acid (ATA) coated iron oxide (Fe3O4) nanoparticles and reduced graphene oxide (RGO) provides an enhanced capacitive performance with higher specific capacitance and long term cyclic stability.

Synthesis and Characterization of Reduced Graphene Oxide

2013 ◽  
Vol 678 ◽  
pp. 56-60 ◽  
Author(s):  
Cherukutty Ramakrishnan Minitha ◽  
Ramasamy Thangavelu Rajendrakumar
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Graphite Oxide ◽  
High Performance ◽  
Structural Changes ◽  
Epoxy Group ◽  
Xrd Analysis ◽  
Si Substrates ◽  
Reduced Graphene ◽  
Reduced Graphite Oxide

Reduced graphene oxide is an excellent candidate for various electronic devices such as high performance gas sensors. In this work Graphene oxide was prepared by oxidizing graphite to form graphite oxide. From XRD analysis the peak around 11.5o confirmed that the oxygen was intercalated into graphite. By using hydrazine hydrate, the epoxy group in graphite oxide was reduced then the solution of reduced graphite oxide (rGO) is exfoliated. Raman spectrum of rGO contains both G band (1580 cm-1), D band (1350 cm-1). The remarkable structural changes reveals that reduction of graphene oxide from the values of ID/IG ratio that increase from 0.727 (GO) to 1.414 (rGO). The exfoliated reduced graphite oxide solution is spin coated on to the SiO2/Si substrates.

scholarly journals Tuning the hierarchical pore structure of graphene oxide through dual thermal activation for high-performance supercapacitor

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jeongpil Kim ◽  
Jeong-Hyun Eum ◽  
Junhyeok Kang ◽  
Ohchan Kwon ◽  
Hansung Kim ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Pore Structure ◽  
Specific Capacitance ◽  
Surface Area ◽  
Thermal Annealing ◽  
High Performance ◽  
Annealing Process ◽  
Supercapacitor Electrode ◽  
Simple Method ◽  
Surface Areas

AbstractHerein, we introduce a simple method to prepare hierarchical graphene with a tunable pore structure by activating graphene oxide (GO) with a two-step thermal annealing process. First, GO was treated at 600 °C by rapid thermal annealing in air, followed by subsequent thermal annealing in N2. The prepared graphene powder comprised abundant slit nanopores and micropores, showing a large specific surface area of 653.2 m2/g with a microporous surface area of 367.2 m2/g under optimized conditions. The pore structure was easily tunable by controlling the oxidation degree of GO and by the second annealing process. When the graphene powder was used as the supercapacitor electrode, a specific capacitance of 372.1 F/g was achieved at 0.5 A/g in 1 M H2SO4 electrolyte, which is a significantly enhanced value compared to that obtained using activated carbon and commercial reduced GO. The performance of the supercapacitor was highly stable, showing 103.8% retention of specific capacitance after 10,000 cycles at 10 A/g. The influence of pore structure on the supercapacitor performance was systematically investigated by varying the ratio of micro- and external surface areas of graphene.

Metal-organic framework derived metal oxide/reduced graphene oxide nanocomposite, a new tool for the determination of dipyridamole

2021 ◽  
Author(s):  
Naeime Salandari-Jolge ◽  
Ali A. Ensafi ◽  
Behzad Rezaei
Keyword(s):  
Myocardial Infarction ◽  
Graphene Oxide ◽  
High Performance ◽  
High Selectivity ◽  
Low Cost ◽  
Metal Organic Framework ◽  
Heart Patients ◽  
Reduced Graphene ◽  
Metal Organic

Dipyridamole is a prescribed medication used to treat cardiovascular diseases, angina pectoris, imaging tests for heart patients, and myocardial infarction. Therefore, high selectivity and sensitivity, low cost, and high-performance speed...

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