Modeling Cyclic Voltammetry of Reduced Graphene Oxide/ Aramid Nanofiber Structural Supercapacitors

2020 ◽  
Vol MA2020-02 (3) ◽  
pp. 653-653
Author(s):  
Sarah Aderyani ◽  
Haleh Ardebili
Keyword(s):  
Cyclic Voltammetry ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene

scholarly journals Reduced Graphene Oxide Fibre Electrodes for Drug Sensing

Proceedings ◽  
2021 ◽  
Vol 68 (1) ◽  
pp. 18
Author(s):  
Sutthima Sriprasertsuk ◽  
John R. Varcoe ◽  
Carol Crean
Keyword(s):  
Cyclic Voltammetry ◽  
Graphene Oxide ◽  
Carbon Fibre ◽  
Reduced Graphene Oxide ◽  
Limit Of Detection ◽  
Linear Range ◽  
Oxidation Peak ◽  
Reduced Graphene ◽  
Fibre Sensor ◽  
Model Drug

Reduced graphene oxide (rGO) fibre electrodes and their ability to sense paracetamol (as model drug) were studied. rGO was electrodeposited onto carbon fibre by two different approaches: potentiostatic deposition and cyclic voltammetry (CV) in the presence of graphene oxide solution. Carbon fibre electrodes coated with rGO (after five CV cycles) could sense paracetamol with an oxidation peak at 0.62 V (vs. Ag/AgCl). The limit of detection of this fibre sensor was found to be 36.3 µM with a linear range of 50–500 µM of paracetamol (R2 = 0.9901).

scholarly journals Electrocatalysis of Ethanol and Methanol Electrooxidation by Composite Electrodes with NiOOH/FeOOH Supported on Reduced Graphene Oxide onto Composite Electrodes

2020 ◽  
Vol 2 (1) ◽  
pp. 2
Author(s):  
João Pedro Jenson de Oliveira ◽  
Acelino Cardoso de Sá ◽  
Leonardo Lataro Paim
Keyword(s):  
Cyclic Voltammetry ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Alkaline Medium ◽  
Methanol Electrooxidation ◽  
Potential Range ◽  
Composite Electrodes ◽  
Reduced Graphene ◽  
Iron Nickel ◽  
Nickel Oxyhydroxide

This paper presents graphite/paraffin composite electrodes modified with microparticles of nickel (Ni) and Ni-Fe alloy anchored in reduced graphene oxide (rGO); these electrodes were made by electrosynthesis. Firstly, the electrodeposition of reduced graphene oxide was made by cyclic voltammetry (CV) onto the graphite/paraffin electrodes’ surface. After electrodeposition of the rGO, iron and nickel were electrodeposited by CV with successive scans. Finally, the formation of iron-nickel oxyhydroxide on the electrode surface was performed by cyclic voltammetry in alkaline medium. The composites were investigated by field emission gun scanning electron microscopy (FEG-SEM); it was observed that the Ni microparticles had spherical shapes, while the Ni-Fe alloy did not present a defined shape. The composite electrodes were used to analysis ethanol and methanol electrooxidation in an alkaline medium of 0.10 mol L−1 of NaOH in a potential range of from −0.20 to 1.0 V (vs. Ag/AgCl) at 50 mV s−1 by CV. The electrodes were able to make the electrooxidation of ethanol at a potential of around 0.57 V for the electrode constituted by the Ni-Fe alloy and around 0.61 V for the electrode modified with Ni, and for methanol in a potential around 0.57 V for the Ni-Fe alloy and around 0.66 V for the Ni electrode. The Ni-Fe alloy electrodes showed the electrocatalysis of the alcohols in relation to Ni electrodes.

scholarly journals An electrodeposited molecularly imprinted quartz crystal microbalance sensor sensitized with AuNPs and rGO material for highly selective and sensitive detection of amantadine

RSC Advances ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 6600-6607 ◽  
Author(s):  
Yaguang Yun ◽  
Mingfei Pan ◽  
Guozhen Fang ◽  
Ying Gu ◽  
Wenjun Wen ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Au Nanoparticles ◽  
Oxide Material ◽  
Molecularly Imprinted ◽  
Quartz Crystal Microbalance Sensor ◽  
Reduced Graphene

In the present work, a new amantadine imprinted quartz crystal microbalance sensor sensitized by Au nanoparticles and reduced graphene oxide material was fabricated by electrodeposition of o-aminothiophenol by cyclic voltammetry scanning.

scholarly journals Application of Atmospheric-Pressure-Plasma-Jet Modified Flexible Graphite Sheets in Reduced-Graphene-Oxide/Polyaniline Supercapacitors

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1228
Author(s):  
Yu-Chuan Hao ◽  
Nurzal Nurzal ◽  
Hung-Hua Chien ◽  
Chen-Yu Liao ◽  
Fei-Hong Kuok ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Atmospheric Pressure Plasma Jet ◽  
Pressure Plasma ◽  
Reduced Graphene ◽  
Graphite Sheets

In this study, flexible and low-cost graphite sheets modified by atmospheric pressure plasma jet are applied to reduced-graphene-oxide/polyaniline supercapacitors. Surface treatment by atmospheric pressure plasma jet can make the hydrophobic surface of graphite into a hydrophilic surface and improve the adhesion of the screen-printed reduced-graphene-oxide/polyaniline on the graphite sheets. After the fabrication of reduced-graphene-oxide/polyaniline supercapacitors with polyvinyl alcohol/H2SO4 gel electrolyte, pseudo-capacitance and electrical double capacitance can be clearly identified by the measurement of cyclic voltammetry. The fabricated supercapacitor exhibits specific capacitance value of 227.32 F/g and areal capacitance value of 28.37 mF/cm2 with a potential scan rate of 2 mV/s. Meanwhile, the capacitance retention rate can reach 86.9% after 1000-cycle cyclic voltammetry test. A light-emitting diode can be lit by the fabricated reduced-graphene-oxide/polyaniline supercapacitors, which confirms that the supercapacitors function well and can potentially be used in a circuit.

scholarly journals Pengaruh Waktu Ultrasonikasi terhadap Sifat Kapasitif Material Reduced Graphene Oxide sebagai Elektroda Superkapasitor

Jurnal IPTEK ◽  
2019 ◽  
Vol 23 (1) ◽  
pp. 9-16
Author(s):  
Haniffudin Nurdiansah ◽  
Diah Susanti ◽  
Hariyati Purwaningsih ◽  
Dah Shyang Tsai ◽  
Lukman Noerochiem
Keyword(s):  
Cyclic Voltammetry ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Graphite Oxide ◽  
Layer Graphene ◽  
Reduced Graphene

Perkembangan pengetahuan di bidang teknologi material sangat pesat dalam beberapa tahun terakhir ini. Kebutuhan akan material penyimpan energi  menjadi sebuah tantangan tersendiri. Seiring dengan ditemukannya material graphene, berkembanglah penelitian mengenai aplikasi graphene sebagai material superkapasitor karena nilai luas permukaan aktif teoritis nya mencapai 2675 m2/gr dan konduktivitas yang juga sangat baik. Reduced Graphene Oxide (rGO) adalah few atau layer graphene yang diperoleh melalui proses pengelupasan kimia dari graphite oxide. Salah satu faktor yang mempengaruhi dalam proses sintesis rGO adalah proses ultrasonikasi, dimana fungsi dari proses ini adalah mengubah graphite oxide menjadi graphene oxide, yang ditandai adanya pengelupasan (exfoliation) dari lembaran graphene sehingga menjadi lebih tipis. Dalam penelitian ini, digunakan waktu ultrasonikasi sebesar 1.5, 2, dan 2.5 jam. Pengujian karakterisasi yang dilakukan adalah pengujian XRD, SEM, Raman, dan FTIR. Dari hasil pengujian didapatkan bahwa material rGO berhasil disintesis. Kemudian dilakukan pengujian performa elektrokimia dengan menggunakan Cyclic Voltammetry (CV). Dari hasil pengujian CV didapatkan bahwa performa terbaik pada pada proses ultrasonikasi 1.5 jam, yaitu kapasitansi nya mencapai 195.15 F/gr.Kata kunci: Ultrasonikasi ; Reduced Graphene Oxide; Superkapasitor; Material Penyimpan Energi

Interaction between Quantum Dots of CdTe and Reduced Graphene Oxide: Investigation through Cyclic Voltammetry and Spectroscopy

2013 ◽  
Vol 117 (40) ◽  
pp. 20944-20950 ◽  
Author(s):  
Ganesh B. Markad ◽  
Shateesh Battu ◽  
Sudhir Kapoor ◽  
Santosh K. Haram
Keyword(s):  
Quantum Dots ◽  
Cyclic Voltammetry ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene
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