Preparation of gold decorated SiO2@polyaniline core–shell microspheres and application as a sensor for ascorbic acid

Weng, Chang-Jian; Chen, Ya-Lun; Chien, Chao-Ming; Hsu, Sheng-Chieh; Jhuo, Yu-Sian; Yeh, Jui‐Ming; Dai, Chung-Feng

doi:10.1016/j.electacta.2013.01.150

Cited by 36 publications

(8 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The obtained modified electrode was used for electrochemical detection of the AA in aqueous solution and showed a broader linear range of 1.0 × 10 −6 mol L −1 -4.5 × 10 −4 mol L −1 and the detection limit was 1 × 10 −7 mol L −1 . The detection limit is lower than those of the similar electrodes obtained by other ways [27][28][29][30].…”

Section: Introductioncontrasting

confidence: 47%

Preparation in-situ of carbon nanotubes/polyaniline modified electrode and application for ascorbic acid detection

Fang

Jiang

Deng

et al. 2015

Journal of Electroanalytical Chemistry

View full text Add to dashboard Cite

Section: Introductioncontrasting

confidence: 47%

Preparation in-situ of carbon nanotubes/polyaniline modified electrode and application for ascorbic acid detection

Fang

Jiang

Deng

et al. 2015

Journal of Electroanalytical Chemistry

View full text Add to dashboard Cite

“…The oxidation potential value (0.025 V) is significantly lower than the AA oxidation potential reported in previous research articles. 40,[45][46][47][48][49][50][51] The results indicate that the presented modified electrode is distinguished by a higher efficiency in the selective detection of ascorbic acid compared to other electrocalysts.…”

Section: Electrocatalytic Oxidation Of Nitrite and Ascorbic Acidmentioning

confidence: 82%

“…Due to the crucial role of AA in biochemistry and in industrial applications, recently there is a considerable research interest to develop electrochemical sensors for detection of AA content in various samples including foods, drugs and biological fluids. [40][41][42][43][44][45][46][47][48][49][50][51] Among the above-mentioned modified electrodes-catalysts applied for nitrite detection, metal oxide-modified electrodes possess some unique electrochemical properties and advantages compared to the other -high stability, enhancement of reaction rate due to the redox couples of oxide species of two different states, as well as weak adsorption or exclusion of hydrogen species on an oxide surface. 31 Because of the high electron transfer rate constant of Ir(IV)/Ir(III) redox couple, IrO x were used as an electron transfer mediator and successfully applied in electrocatalysis.…”

Section: Introductionmentioning

confidence: 99%

An Electrochemical Sensing Platform Based on Iridium Oxide for Highly Sensitive and Selective Detection of Nitrite and Ascorbic Acid

Dodevska

Shterev

Lazarova

2018

ACSi

View full text Add to dashboard Cite

Iridium oxide (IrO x) was electrodeposited onto glassy carbon electrode applying two-step potential cycling procedure. The electrocatalytic properties of the modified electrode IrO x /GC were evaluated with regards to electrochemical oxidation of nitrite and ascorbic acid (AA). The developed electrode-catalyst have been extensively studied by various electrochemical techniques. Differential pulse voltammetry (DPV) experiments indicated that the modified electrode possesses excellent electrocatalytic activity towards the oxidation of both nitrite and AA in neutral medium and offers simultaneous quantification of these substances. Constant potential amperometry studies also were performed-the IrO x / GC showed sensitive response to nitrite (159.7 μA mM-1 cm-2) with a wide linear range from 0.002 to 10 mM at 0.77 V (vs. Ag/AgCl, 3 M KCl), and to AA (96.2 µA mM-1 cm-2) with a linear range from 0.01 to 3 mM at 0.025 V. The detection limit was 0.63 μM nitrite and 4 μM AA, respectively, and both of them had fast response within 5 s. Considering the simple and rapid electrodeposition procedure for preparation, IrO x /GC is a new electrode-catalyst for sensitive and selective quantitative detection of nitrite and AA. The wide linear range, good selectivity, reproducibility of the amperometric response and long-time stability of the IrO x /GC make it a promising sensing material for practical nonenzymatic quantitative detection of nitrite and AA.

show abstract

“…Among the array of conducting polymers (CP), polyaniline (PANI) is considered highly stable, with a unique redox chemistry and the ability to electrically switch between its conductive and resistive states through the doping/dedoping process, which can be controlled by acid/base reaction [ 6 , 7 , 8 ]. The redox property of PANI and its derivative polymers make them applicable for electrochemical sensing [ 9 , 10 , 11 ]. Their doping/dedoping property also expands their useability for gas sensing [ 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

H2S-Sensing Studies Using Interdigitated Electrode with Spin-Coated Carbon Aerogel-Polyaniline Composites

et al. 2021

Self Cite

View full text Add to dashboard Cite

In this paper, carbon aerogel (CA)-polyaniline (PANI) composites were prepared and first applied in the study of H2S gas sensing. Here, 1 and 3 wt% of as-obtained CA powder were blended with PANI to produce composites, which are denoted by PANI-CA-1 and PANI-CA-3, respectively. For the H2S gas-sensing studies, the interdigitated electrode (IDE) was spin-coated by performing PANI and PANI-CA composite dispersion. The H2S gas-sensing properties were studied in terms of the sensor’s sensitivity, selectivity and repeatability. IDE coated with PANI-CA composites, as compared with pristine PANI, achieved higher sensor sensitivity, higher selectivity and good repeatability. Moreover, composites that contain higher loading of CA (e.g., 3 wt%) perform better than composites with lower loading of CA. At 1 ppm, PANI-CA-3 displayed increased sensitivity of 452% at relative humidity of 60% with a fast average response time of 1 s compared to PANI.

show abstract

Preparation of gold decorated SiO2@polyaniline core–shell microspheres and application as a sensor for ascorbic acid

Cited by 36 publications

References 30 publications

Preparation in-situ of carbon nanotubes/polyaniline modified electrode and application for ascorbic acid detection

Preparation in-situ of carbon nanotubes/polyaniline modified electrode and application for ascorbic acid detection

An Electrochemical Sensing Platform Based on Iridium Oxide for Highly Sensitive and Selective Detection of Nitrite and Ascorbic Acid

H2S-Sensing Studies Using Interdigitated Electrode with Spin-Coated Carbon Aerogel-Polyaniline Composites

Contact Info

Product

Resources

About