Electrostatic accumulation and determination of triclosan in ultrathin carbon nanoparticle composite film electrodes

Amiri, Mandana; Shahrokhian, Saeed; Psillakis, Elefteria; Marken, Frank

doi:10.1016/j.aca.2007.04.042

Cited by 73 publications

(34 citation statements)

References 19 publications

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“…9 to 18 nm diameter. 20 These negatively charged particles are readily soluble in aqueous media and they have been employed in nanoparticle deposition processes with positively charged poly-electrolyte binders. 21 The key idea for this study is based on the conversion of the sulfonate into sulfonyl chloride endgroups which are then functionalised with amine functionalities (see Figure 1 A linear relationship between the capacitance and the amount of deposited carbon material is observed (see Figure 5B) and the resulting specific capacitance is 3.3 Fg -1 .…”

Section: Synthesis and Characterisation Of Sulphonamide-modified Carbmentioning

confidence: 99%

Carbon nanoparticle surface functionalisation: converting negatively charged sulfonate to positively charged sulfonamide

Watkins

Lawrence

Taylor

et al. 2010

Phys. Chem. Chem. Phys.

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Section: Synthesis and Characterisation Of Sulphonamide-modified Carbmentioning

confidence: 99%

Carbon nanoparticle surface functionalisation: converting negatively charged sulfonate to positively charged sulfonamide

Watkins

Lawrence

Taylor

et al. 2010

Phys. Chem. Chem. Phys.

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“…As a phenol it is readily oxidized and the anodic peak current observed in voltammetric measurements has been employed for the quantitative determination for example at mercury electrodes [35], at carbon microfibers [36], and at screen-printed electrodes [37]. The hydrophobic nature of the triclosan anion has been exploited recently for the accumulation and detection in carbonchitosan thin-film electrodes [38] and in cellulose-PDDAC films [21]. In this report the uptake and reactivity of triclosan is investigated in order to compare the benefits and effects of chitosan relative to those observed for poly(diallyldimethylammonium chloride) (PDDAC).…”

Section: Electrochemical Processes In Cellulose-chitosanmentioning

confidence: 99%

Nanofibrillar Cellulose‐Chitosan Composite Film Electrodes: Competitive Binding of Triclosan, Fe(CN)₆^3−/4−, and SDS Surfactant

Tsourounaki¹,

Bonné²,

Thielemans³

et al. 2008

Electroanalysis

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Glassy carbon electrodes are modified with a thin film of a cellulose-chitosan nanocomposite. Cellulose nanofibrils (of ca. 4 nm diameter and 250 nm length) are employed as an inert backbone and chitosan (poly-d-glucosamine, low molecular weight, 75 -85% deacetylated) is introduced as a structural binder and "receptor" or molecular binding site. The composite films are formed in a solvent evaporation method and prepared in approximately 0.8 mm thickness. The adsorption of three molecular systems into the cellulose-chitosan films is investigated and approximate Langmuirian binding constants are evaluated: i) Fe(CN) 6 4À (K Ferrocyanide ¼ 2.2 Â 10 3 mol À1 dm 3 in 0.1 M phosphate buffer at pH 6) is observed to bind to ammonium chitosan functionalities (present at pH < 7), ii) triclosan (K Triclosan ¼ 2.6 Â 10 3 mol À1 dm 3 in 0.1 M phosphate buffer pH 9.5) is shown to bind only weakly and under alkaline conditions, and iii) the anionic surfactant dodecylsulfate (K SDS ¼ 3.3 Â 10 4 mol À1 dm 3 in 0.1 M phosphate buffer pH 6) is shown to bind relatively more strongly in acidic media. The competitive binding of Fe(CN) 6 4À and dodecylsulfate anions is proposed as a way to accumulate and indirectly determine the anionic surfactant.

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“…These characteristics make PPy highly suitable for various electrochemical applications for the determination of various cationic, anionic and neutral molecular species [20][21][22][23]. Recently, a variety of methods have been reported for producing composites from the combination of various conductors (carbon black, graphite powder, carbon fiber and metal nanoparticles) with various conducting and nonconducting polymers [24][25][26][27][28][29]. The goal is to achieve a synergistic effect with regards to the properties of the two components.…”

Section: Introductionmentioning

confidence: 99%

Sensitive Electrochemical Sensor for Determination of Methyldopa Based on Polypyrrole/Carbon Nanoparticle Composite Thin Film Made by In Situ Electropolymerization

2011

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A composite surface coating is prepared by electropolymerization of a mixture of pyrrole and carbon nanoparticles onto a glassy carbon electrode (GCE). The microscopic structure and morphology of the composite film is characterized by scanning electron microscopy. The modified electrode offers a considerable improvement in voltammetric sensitivity toward methyldopa (m-dopa), compared to the bare and polypyrrole-coated GCEs. A significantly enhanced anodic peak current together with a remarkable increase in sharpness of the cyclic voltammetric (CV) signals are observed for the detection of m-dopa. The effect of experimental parameters, such as scan rate and pH, are investigated by monitoring CV responses toward m-dopa. It is found that a maximum current response can be obtained at pH 3.0 under a diffusion controlled process. A wide linear dynamic range (0.2-50 mM) with a detection limit of 60 nM is achieved for m-dopa. The excellent response characteristics, e.g., high sensitivity, very good repeatability and reproducibility, and low detection limit, have made the prepared sensor suitable for the analysis of mdopa in pharmaceutical and clinical preparations.

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Electrostatic accumulation and determination of triclosan in ultrathin carbon nanoparticle composite film electrodes

Cited by 73 publications

References 19 publications

Carbon nanoparticle surface functionalisation: converting negatively charged sulfonate to positively charged sulfonamide

Carbon nanoparticle surface functionalisation: converting negatively charged sulfonate to positively charged sulfonamide

Nanofibrillar Cellulose‐Chitosan Composite Film Electrodes: Competitive Binding of Triclosan, Fe(CN)₆^3−/4−, and SDS Surfactant

Sensitive Electrochemical Sensor for Determination of Methyldopa Based on Polypyrrole/Carbon Nanoparticle Composite Thin Film Made by In Situ Electropolymerization

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Electrostatic accumulation and determination of triclosan in ultrathin carbon nanoparticle composite film electrodes

Cited by 73 publications

References 19 publications

Carbon nanoparticle surface functionalisation: converting negatively charged sulfonate to positively charged sulfonamide

Carbon nanoparticle surface functionalisation: converting negatively charged sulfonate to positively charged sulfonamide

Nanofibrillar Cellulose‐Chitosan Composite Film Electrodes: Competitive Binding of Triclosan, Fe(CN)63−/4−, and SDS Surfactant

Sensitive Electrochemical Sensor for Determination of Methyldopa Based on Polypyrrole/Carbon Nanoparticle Composite Thin Film Made by In Situ Electropolymerization

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Nanofibrillar Cellulose‐Chitosan Composite Film Electrodes: Competitive Binding of Triclosan, Fe(CN)₆^3−/4−, and SDS Surfactant