A Robust Electrochemical Sensor for Determination of ThiamethoxamBased on Electrochemical Reduced Graphene Oxide-Cationic Pillar[6]arene Composite Film

Abstract On the surface of a glassy carbon electrode, electrochemically reduced graphene oxide-cationic pillar[6]arene (ErGO-CP6) composite film was constructed using a pulsed potential method. UV-vis spectra, SEM, Raman spectra and electrochemical experiments were applied to characterize the composite film. It was then used as a new electrochemical sensing platform for determination of thiamethoxam. Due to the synergistic effect of ErGO and CP6, this composite film shows a higher sensitivity and better selectivity toward thiamethoxam than that of ErGO film. The linear range from 1.0 × 10-7 to 1.3 × 10-5 mol L-1 was obtained by differential pulse voltammetry. Meanwhile, the method was applied to cucumber and tomato samples in a recovery test. The recovery was between 92.0% and 98.7%, and the results are satisfactory. This study presents a promising electrochemical sensing platform for rapid and sensitive analysis of thiamethoxam.

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

Journal of Analytical Methods in Chemistry ◽

10.1155/2014/984314 ◽

2014 ◽

Vol 2014 ◽

pp. 1-10 ◽

Cited By ~ 3

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.

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A label-free biosensor based on graphene and reduced graphene oxide dual-layer for electrochemical determination of beta-amyloid biomarkers

Microchimica Acta ◽

10.1007/s00604-020-04267-x ◽

2020 ◽

Vol 187 (5) ◽

Cited By ~ 4

Author(s):

Jagriti Sethi ◽

Michiel Van Bulck ◽

Ahmed Suhail ◽

Mina Safarzadeh ◽

Ana Perez-Castillo ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Limit Of Detection ◽

Electrochemical Techniques ◽

Differential Pulse ◽

Electrochemical Determination ◽

Label Free ◽

Reduced Graphene ◽

Electrochemically Reduced Graphene Oxide

AbstractA label-free biosensor is developed for the determination of plasma-based Aβ1–42 biomarker in Alzheimer’s disease (AD). The platform is based on highly conductive dual-layer of graphene and electrochemically reduced graphene oxide (rGO). The modification of dual-layer with 1-pyrenebutyric acid N-hydroxysuccinimide ester (Pyr-NHS) is achieved to facilitate immobilization of H31L21 antibody. The effect of these modifications were studied with morphological, spectral and electrochemical techniques. The response of the biosensor was evaluated using differential pulse voltammetry (DPV). The data was acquired at a working potential of ~ 180 mV and a scan rate of 50 mV s−1. A low limit of detection (LOD) of 2.398 pM is achieved over a wide linear range from 11 pM to 55 nM. The biosensor exhibits excellent specificity over Aβ1–40 and ApoE ε4 interfering species. Thus, it provides a viable tool for electrochemical determination of Aβ1–42. Spiked human and mice plasmas were used for the successful validation of the sensing platform in bio-fluidic samples. The results obtained from mice plasma analysis concurred with the immunohistochemistry (IHC) and magnetic resonance imaging (MRI) data obtained from brain analysis.

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An electrochemical sensor based on copper-based metal–organic framework-reduced graphene oxide composites for determination of 2,4-dichlorophenol in water

RSC Advances ◽

10.1039/d0ra06700h ◽

2020 ◽

Vol 10 (69) ◽

pp. 42212-42220

Author(s):

Manh B. Nguyen ◽

Vu Thi Hong Nhung ◽

Vu Thi Thu ◽

Dau Thi Ngoc Nga ◽

Thuan Nguyen Pham Truong ◽

...

Keyword(s):

Graphene Oxide ◽

Electrochemical Sensor ◽

Reduced Graphene Oxide ◽

Metal Organic Framework ◽

Electrochemical Sensing ◽

Sensing Platform ◽

Reduced Graphene ◽

Metal Organic ◽

Oxide Composites

In the present work, we reported the fabrication of a novel electrochemical sensing platform to detect 2,4-dichlorophenol (2,4-DCP) by using a copper benzene-1,3,5-tricarboxylate–graphene oxide (Cu–BTC/GO) composite.

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Square-wave stripping voltammetric determination of caffeic acid on electrochemically reduced graphene oxide–Nafion composite film

Talanta ◽

10.1016/j.talanta.2013.05.031 ◽

2013 ◽

Vol 116 ◽

pp. 245-250 ◽

Cited By ~ 48

Author(s):

Hayati Filik ◽

Gamze Çetintaş ◽

Asiye Aslıhan Avan ◽

Sevda Aydar ◽

Serkan Naci Koç ◽

...

Keyword(s):

Graphene Oxide ◽

Composite Film ◽

Caffeic Acid ◽

Reduced Graphene Oxide ◽

Voltammetric Determination ◽

Square Wave ◽

Reduced Graphene ◽

Electrochemically Reduced Graphene Oxide

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A novel electrochemical sensor for non-ergoline dopamine agonist pramipexole based on electrochemically reduced graphene oxide nanoribbons

Analytical Methods ◽

10.1039/c5ay00282f ◽

2015 ◽

Vol 7 (9) ◽

pp. 3912-3919 ◽

Cited By ~ 8

Author(s):

Prashanth S. Narayana ◽

Nagappa L. Teradal ◽

J. Seetharamappa ◽

Ashis K. Satpati

Keyword(s):

Graphene Oxide ◽

Dopamine Agonist ◽

Biological Fluids ◽

Pharmaceutical Formulations ◽

Electrochemical Sensing ◽

Graphene Oxide Nanoribbons ◽

Sensing Platform ◽

Reduced Graphene ◽

Electrochemically Reduced Graphene Oxide

A facile and feasible electrochemical sensing platform based on graphene oxide nanoribbons for electrochemical investigations and determination of a non-ergoline dopamine agonist in pharmaceutical formulations and biological fluids.

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Simultaneous Voltammetric Determination of Ascorbic Acid, Paracetamol, and Caffeine Using Electrochemically Reduced Graphene-Oxide-Modified Electrode

Journal of Nanomaterials ◽

10.1155/2018/5348016 ◽

2018 ◽

Vol 2018 ◽

pp. 1-15 ◽

Cited By ~ 13

Author(s):

Nguyen Hai Phong ◽

Tran Thanh Tam Toan ◽

Mai Xuan Tinh ◽

Tran Ngoc Tuyen ◽

Tran Xuan Mau ◽

...

Keyword(s):

Ascorbic Acid ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Modified Electrode ◽

Anodic Stripping Voltammetry ◽

Pharmaceutical Preparations ◽

Differential Pulse ◽

Reduced Graphene ◽

Electrochemically Reduced Graphene Oxide

In the present paper, graphene oxide was directly electrodeposited by means of cyclic voltammetric techniques on the glassy-carbon electrode (GCE) to obtain a reduced graphene-oxide-modified electrode (ErGO/GCE). Cyclic voltammetry (CV) and differential pulse anodic stripping voltammetry (DP-ASV) had been utilized to study the electrochemical behavior of ErGO/GCE toward ascorbic acid (AA), paracetamol (PA), and caffeine (CA). Differential pulse voltammetry results show that AA, PA, and CA could be detected selectively and sensitively on ErGO/GCE with peak-to-peak separation of 312 mV and 756 mV for AA–PA and PA–CA, respectively. The factors affecting the voltammetric signals such as pH, scan rate, and interferents were addressed. The results reveal that the ErGO/GCE-modified electrode exhibits excellent electrochemical activity in the oxidation of PA, CA, and AA. The detection limits are 0.36 μM, 0.25 μM, and 0.23 μM for AA, PA and CA, respectively, suggesting that the ErGO/GCE can be utilized with high sensitivity and selectivity for the simultaneous determination of these compounds. Finally, the proposed method was successfully used to determine AA, PA, and CA in pharmaceutical preparations.

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A sensitive impedimetric DNA biosensor for the determination of the HIV gene based on electrochemically reduced graphene oxide

Analytical Methods ◽

10.1039/c5ay00111k ◽

2015 ◽

Vol 7 (6) ◽

pp. 2554-2562 ◽

Cited By ~ 34

Author(s):

Qiaojuan Gong ◽

Haiying Yang ◽

Yanyun Dong ◽

Wenchan Zhang

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Dna Biosensor ◽

Sensing Platform ◽

Reduced Graphene ◽

Electrochemically Reduced Graphene Oxide

A sensitive impedimetric DNA biosensor for the determination of the HIV gene was developed by employing electrochemically reduced graphene oxide as a sensing platform.

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