Simultaneous Determination of Adenine and Guanine Using Cadmium Selenide Quantum Dots-Graphene Oxide Nanocomposite Modified Electrode

2015 ◽  
Vol 15 (6) ◽  
pp. 4697-4705 ◽  
Author(s):  
Arumugam Kalaivani ◽  
Sangilimuthu Sriman Narayanan
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Simultaneous Determination ◽  
Cadmium Selenide ◽  
Modified Electrode ◽  
Cadmium Selenide Quantum Dots

Cadmium Selenide Quantum Dots - MWCNTs Nanocomposite Modified Electrode for the Determination of Epinephrine

2014 ◽  
Vol 938 ◽  
pp. 176-181 ◽  
Author(s):  
Arumugam Kalaivani ◽  
Sangilimuthu Sriman Narayanan
Keyword(s):  
Electron Microscopy ◽  
Quantum Dots ◽  
Cadmium Selenide ◽  
Modified Electrode ◽  
Phosphate Buffer Solution ◽  
Electrochemical Characteristics ◽  
Buffer Solution ◽  
Transmission Electron ◽  
Cadmium Selenide Quantum Dots

A novel Cadmium selenide Quantum dots MWCNTs nanocomposite modified electrode was achieved by simple drop casting method and its application towards the quantitative determination of epinephrine. The Cadmium selenide Quantum Dots was characterized by transmission electron microscopy and MWCNT was characterized by scanning electron microscopy. The electrochemical characteristics of the modified electrode were studied using cyclic voltammetry. The voltammetric response of the modified electrode was higher than that of the MWCNT and bare electrodes. The modified electrode exhibits excellent electrocatalytic activity towards the oxidation of epinephrine by enhancing its oxidation current in 0.1M phosphate buffer solution. The determination range of epinephrine is from 0.16 μM to 14 μM and the detection limit was 0.05 μM (S/N = 3). The proposed modified electrode exhibited good stability and reproducibility.

scholarly journals Simultaneous Determination of Uric Acid and Xanthine Using a Poly(Methylene Blue) and Electrochemically Reduced Graphene Oxide Composite Film Modified Electrode

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Gen Liu ◽  
Wei Ma ◽  
Yan Luo ◽  
Deng-ming Sun ◽  
Shuang Shao
Keyword(s):  
Methylene Blue ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Composite Film ◽  
Simultaneous Determination ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide

Poly(methylene blue) and electrochemically reduced graphene oxide composite film modified electrode (PMB-ERGO/GCE) was successfully fabricated by electropolymerization and was used for simultaneous determination of uric acid (UA) and xanthine (Xa). Based on the excellent electrocatalytic activity of PMB-ERGO/GCE, the electrochemical behaviors of UA and Xa were studied by cyclic voltammetry (CV) and square wave voltammetry (SWV). Two anodic sensitive peaks at 0.630 V (versus Ag/AgCl) for UA and 1.006 V (versus Ag/AgCl) for Xa were given by CV in pH 3.0 phosphate buffer. The calibration curves for UA and Xa were obtained in the range of 8.00 × 10−8~4.00 × 10−4 M and 1.00 × 10−7~4.00 × 10−4 M, respectively, by SWV. The detection limits for UA and Xa were3.00×10-8 M and5.00×10-8 M, respectively. Finally, the proposed method was applied to simultaneously determine UA and Xa in human urine with good selectivity and high sensitivity.

scholarly journals A Voltammetric Sensor Based on MgFe2 O4 Decorated on Reduced Graphene Oxide-modified Electrode for Sensitive and Simultaneous Determination of Catechol and Hydroquinone

2018 ◽  
Vol 30 (11) ◽  
pp. 2620-2627 ◽  
Author(s):  
Miloš Ognjanović ◽  
Dalibor M. Stanković ◽  
Martin Fabián ◽  
Aleksandar Vukadinović ◽  
Željko Prijović ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Simultaneous Determination ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Voltammetric Sensor ◽  
Reduced Graphene

A promising photoelectrochemical sensor based on a ZnO particle decorated N-doped reduced graphene oxide modified electrode for simultaneous determination of catechol and hydroquinone

RSC Advances ◽  
2014 ◽  
Vol 4 (89) ◽  
pp. 48522-48534 ◽  
Author(s):  
A. T. Ezhil Vilian ◽  
Muniyandi Rajkumar ◽  
Shen-Ming Chen ◽  
Chi-Chang Hu ◽  
Shakkthivel Piraman
Keyword(s):  
Graphene Oxide ◽  
Simultaneous Determination ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Nitrogen Doped ◽  
Electrochemical Application ◽  
Reduced Graphene ◽  
Photoelectrochemical Sensor

This paper describes the two-step synthesis of a nitrogen-doped reduced graphene oxide–ZnO (N-doped RGO–ZnO) nanocomposite and its photo electrochemical application.

Gold nanoparticle decorated polypyrrole/graphene oxide nanosheets as a modified electrode for simultaneous determination of ascorbic acid, dopamine and uric acid

2020 ◽  
Vol 44 (12) ◽  
pp. 4916-4926 ◽  
Author(s):  
Chaoli Tan ◽  
Jie Zhao ◽  
Peng Sun ◽  
Wei Zheng ◽  
Guofeng Cui
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Simultaneous Determination ◽  
Gold Nanoparticle ◽  
Modified Electrode ◽  
Graphene Oxide Nanosheets

AuNPs, GO and PPy are combined effectively to form a novel composite showing a huge enhancement in electrochemical performance compared to the single materials.

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