Polyaniline/AgCl Hybrid Materials for Selective Determination of Dopamine by Electrochemical Methods

Zhou, Shuangli; Xie, Manyuan; Yuan, Xiaoli; Zeng, Fulong; Zou, Wujun; Yuan, Dingsheng

doi:10.4236/ajac.2012.35051

Cited by 8 publications

(4 citation statements)

References 28 publications

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“…No significant changes were observed after dopamine modification because the broad −OH absorption of cellulose suppressed both −NH (amide) and catechol −OH of the dopamine moiety. However, a new peak at 1570 cm –1 appeared after the immobilization of the silver nanoparticles onto the paper surface which was attributed to the formation of the Ag-catechol ring between the silver nanoparticles and catechol −OH groups as consistent with previous observations . Hence, the FTIR spectra of the samples yet again confirmed the immobilization of AgNPs via dopamine functionalization on the paper surface.…”

Section: Resultssupporting

confidence: 90%

Mussel-Inspired Immobilization of Silver Nanoparticles toward Antimicrobial Cellulose Paper

Islam

Akter

Rahman

et al. 2018

ACS Sustainable Chem. Eng.

111

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Paper and paper products are widely used without any antimicrobial efficacy in our everyday lives and thus can act as potential transporters of many diseases. Herein, we introduce antimicrobial activity to cellulose paper by presenting a tailored mussel-inspired strategy for the sustainable immobilization of silver nanoparticles (AgNPs), which are well-known for the effectiveness in preventing annexation and proliferation of microbes on materials surfaces. First, we functionalized the cellulose paper with succinic acid that eventually reacted with dopamine to give dopamine-modified paper. The dopamine molecules possess excellent adhesion and strong coordination with metal substrates through catechol groups offering a potentially robust interface between AgNPs and the organic structure of the paper. Next, AgNPs were deposited onto the paper by simply immersing dopamine-modified paper in a silver salt solution to accomplish the antimicrobial properties. Field emission scanning electron microscopic study of the synthesized antimicrobial papers confirmed that the loading of AgNPs was time-dependent, and the average size of the nanoparticles was in the range of 50–60 nm after 8 h of deposition time. The paper decorated with AgNPs showed excellent antimicrobial activity against highly virulent and multiple antibiotic resistant Gram-positive and Gram-negative pathogenic bacteria as well as against some extremely virulent fungal phytopathogens.

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Section: Resultssupporting

confidence: 90%

Mussel-Inspired Immobilization of Silver Nanoparticles toward Antimicrobial Cellulose Paper

Islam

Akter

Rahman

et al. 2018

ACS Sustainable Chem. Eng.

111

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“…Apart from that, larger background currents were appeared for the MWCNT, PANI and MWCNT-PANI, which is due to the interaction of electrolyte ions with the interlayer of modified surface. As can be seen from Figure 5A-c), a pair of board redox peaks located at 0.59 V and 0.25 V on the PANI/GCE, which is attributed to redox process normally found for the PANI system [34,35]. The observed broad redox peaks can be attributed to the redox active moieties on the carbon nanotube surface [33].…”

Section: Electrochemical Behavior Of 5-ht At Different Electrodesmentioning

confidence: 65%

Electrochemical Determination of Serotonin Using Pre‐treated Multi‐walled Carbon Nanotube‐polyaniline Composite Electrode

2018

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In this study, the multiwalled carbon nanotube‐poly (aniline) (MWCNT‐PANI) composite is successfully deposited on the glassy carbon electrode (GCE) by electropolymerization as an efficient and conventional route. The structural and chemical properties of the MWCNT‐PANI was investigated by various spectroscopic and analytical techniques, scanning electron microscopy (SEM), X‐Ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). After that, the electrochemical oxidation behavior of serotonin (5‐HT) in phosphate buffer solution (pH 7.4) was examined using cyclic voltammetry (CV). Besides, the MWCNT‐PANI/GCE used for the detection of 5‐HT with linear concentration range (1.0×10−7–1.2×10−5 mol L−1), low limit of detection (3.3×10−8 mol L−1) under differential pulse voltammetric (DPV) conditions. The proposed electrochemical sensor based on MWCNT‐PANI is both time and cost effective, has good reproducibility, high selectivity as well as stability for 5‐HT determination. The developed composite electrode was used to detect 5‐HT in synthetic urine sample and satisfactory results were obtained with high recoveries.

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“…More recently Huagi and Jiping [21] have synthesized silver halide/PANI nanocomposites with different PANI morphology. Ag@ AgCl nanocomposite was synthesized for photocatalyst under visible light and biosensors [20,[22][23][24]. Since PANI is being synthesized in different morphologies, therefore the addition of light sensitive silver halides open new possibilities with improved performance.…”

Section: Introductionmentioning

confidence: 99%

Thermal and electrical behavior of silver chloride/polyaniline nanocomposite synthesized in aqueous medium using hydrogen peroxide

Vohra

Kumar

Mittal

et al. 2012

J Mater Sci: Mater Electron

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Nanocomposites of AgCl/PANI were synthesized by chemical polymerization/precipitation in aqueous HCl solution using both aniline monomer and AgNO 3 precursors in different molar ratio in PVP. Silver ions interact with PVP which restrict the bulk growth of AgCl and keep it in nanosized. During synthesis, AgCl NPs got entrapped in PANI chains through inter-chain hydrogen bonding. TGA studies showed complete decomposition of polymer chains occurred at 30-40 °C higher temperature than PANI alone. DSC studies indicate higher thermal stability of the composite, which is due to more heat flow for decomposition of polymer chains indicating compact packing of polymer matrix with AgCl NPs having large surface area to volume ratio. The TEM image showed spherical NPs were randomly dispersed in a polymer matrix and from XRD data crystalline nature of composite was seen. In FT-IR spectrum strong absorption band of a carbonyl stretching group due to PVP indicates its presence on nanoparticle surface in composite. Thin films of nanocomposite were spin casted on ITO coated glass surface. Electrical conductance was calculated from I-V data which was found to be in the range of 10 -2 -10 -7 S cm -1 depending on the concentration of NPs in it. These composites may find applications in solar cells as semiconductor material and for designing multiarray sensors for quality interpretation of beverages on the basis of their conductance changes using soft computing techniques.

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Polyaniline/AgCl Hybrid Materials for Selective Determination of Dopamine by Electrochemical Methods

Cited by 8 publications

References 28 publications

Mussel-Inspired Immobilization of Silver Nanoparticles toward Antimicrobial Cellulose Paper

Mussel-Inspired Immobilization of Silver Nanoparticles toward Antimicrobial Cellulose Paper

Electrochemical Determination of Serotonin Using Pre‐treated Multi‐walled Carbon Nanotube‐polyaniline Composite Electrode

Thermal and electrical behavior of silver chloride/polyaniline nanocomposite synthesized in aqueous medium using hydrogen peroxide

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