Poly(malachite green) at nafion doped multi-walled carbon nanotube composite film for simple aliphatic alcohols sensor

Umasankar, Yogeswaran; Periasamy, Arun Prakash; Chen, Shen‐Ming

doi:10.1016/j.talanta.2009.08.034

Cited by 18 publications

(4 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Where, the increase in peak current and decrease in overpotential, are considered as the electrocatalytic activity. 35,36 This electrocatalytic activity in MWCNTs-NGB composite film is because of the presence of both MWCNTs and NGB. From the slopes of linear calibration curves (Fig.…”

Section: àmentioning

confidence: 99%

Determination of peroxodisulfate ion using composite film containing naphthol green B and multi-walled carbon nanotubes

2011

Self Cite

View full text Add to dashboard Cite

An electrochemically active composite film which contains multi-walled carbon nanotubes (MWCNTs) incorporated with naphthol green B (NGB) was synthesized on glassy carbon, gold and indium tin oxide electrodes by potentiodynamic method. The presence of MWCNTs in the composite (MWCNTs-NGB) film modified electrodes mediates redox reaction of Fe III/II present in NGB, whereas no redox reaction of NGB occurred at the bare electrode. The electrochemical impedance spectroscopy studies revealed that NGB and MWCNTs present in MWCNTs-NGB composite film enhances electron shuttling between the reactant and electrode surface. The surface morphology of the MWCNTs and MWCNTs-NGB were studied using atomic force microscopy, which revealed that NGB incorporated and covered the MWCNTs on the modified electrode. The MWCNTs-NGB composite film exhibits promising enhanced electrocatalysis towards S 2 O 8 2À . The response of S 2 O 8 2À at MWCNTs and MWCNTs-NGB composite films was measured using both cyclic voltammetry and i-t curve techniques. The linear concentration range of S 2 O 8 2À determination at MWCNTs-NGB composite film was from 15.9 mM to 7.1 mM. The sensitivity of MWCNTs-NGB composite film towards S 2 O 8 2À was À301.9 mA mM À1 cm À2 , and the limit of detection was 6.9 mM. These above values are better than the values obtained at MWCNTs film.

show abstract

Section: àmentioning

confidence: 99%

Determination of peroxodisulfate ion using composite film containing naphthol green B and multi-walled carbon nanotubes

2011

Self Cite

View full text Add to dashboard Cite

show abstract

“…24,25 Catechin is known to undergo auto-oxidation generating free radical intermediates and active Oxygen species such as O 2 -and H 2 O 2 and SWCNT is a good conductor while having the ability to promote electron transfer reaction when used as an electrode in an electrochemical reaction. [26][27][28] The electrode thereby acts as a conductor; the contribution of the electrolyte plays a significant role in addition to the electrode. The total impedance of the system was found to be about 1.5 MWcm, in comparison to that the resistivity of the six electrodes as seen in Table 3 is very less.…”

Section: Sensor Signalmentioning

confidence: 99%

Application of Impedance Measurement Technology in Distinguishing Different Tea Samples with Ppy/SWCNT Composite Sensing Material

Roy

Tsai

Liang

et al. 2011

J Chinese Chemical Soc

View full text Add to dashboard Cite

A six sensor electrode system was developed to distinguish three tea extract samples by using impedance measurement technology. Five of the six sensing electrodes were made of different wt% single walled carbon nanotubes (SWCNT) and electropolymerizedpyrrole over the surface of gold electrodes. The sixth electrode was made by electropolymerizedpyrrole doped with Poly (sodium-4-styrenesulfonate). The sensing electrodes were characterized by FT-IR, Cyclic Voltammetry, and Transmission Electron Microscope. Various concentrations of six tea leaf extracts (3 types) were made and scanned at different frequencies and the best frequency of 100 kHz was chosen. Principal component analysis (PCA) was performed on the signals to show that the signals vary to distinguish each of the tea samples and lead to subsequent classification.

show abstract

“…[22,23]. Chen et al [24,25] used the enhanced electrocatalytic activity of PMG combining with nafion (NF)-multiwalled carbon nanotube to detect phenols and alcohols.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical determination of methyl parathion using poly(malachite green)/graphene nanosheets–nafion composite film-modified glassy carbon electrode

Zhu

et al. 2012

J Appl Electrochem

View full text Add to dashboard Cite

A novel poly(malachite green)/graphene nanosheets-nafion (PMG/GNs-NF) composite film-modified glassy carbon electrode was developed to indirectly detect methyl parathion (MP). p-nitrophenol, the alkaline hydrolysis product of MP, was successfully determined at a relatively lower potential using this modified electrode due to the excellent electrocatalytic activity of PMG/GNs-NF composite film. The presence of GNs in the composite film enhanced the stability of PMG and increased the electron transfer rate. The kinetic parameters of modified electrodes were studied. What is more, the optimum experimental parameters affecting response were selected in terms of pH, accumulation potential, accumulation time, scanning cycles during polymerization of malachite green, and alkaline hydrolysis conditions. Under optimum conditions, the chronoamperometric response current was proportional to MP concentration over the range from 0.02 to 1.5 lM with a low-detection limit of 2.0 nM. Finally, the sensor was applied for the determination of MP in real samples, and the results were satisfactory with recoveries from 97.20 to 104.53 %. Due to its simple preparation, good reproducibility, and stability, this developed modified electrode provides a new platform for the detection of organophosphate pesticides.

show abstract

Poly(malachite green) at nafion doped multi-walled carbon nanotube composite film for simple aliphatic alcohols sensor

Cited by 18 publications

References 44 publications

Determination of peroxodisulfate ion using composite film containing naphthol green B and multi-walled carbon nanotubes

Determination of peroxodisulfate ion using composite film containing naphthol green B and multi-walled carbon nanotubes

Application of Impedance Measurement Technology in Distinguishing Different Tea Samples with Ppy/SWCNT Composite Sensing Material

Electrochemical determination of methyl parathion using poly(malachite green)/graphene nanosheets–nafion composite film-modified glassy carbon electrode

Contact Info

Product

Resources

About