The electrocatalytic oxidation of ascorbic acid on polyaniline film synthesized in the presence of camphorsulfonic acid

Zhang, Lei; Dong, Shaojun

doi:10.1016/j.jelechem.2004.01.022

Cited by 106 publications

(10 citation statements)

References 35 publications

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“…In the present work, the nano-composite material showed glucose selectivity only against UA and AP. In this work, it was observed that PANI was able to oxidize AA as observed previously [17]. The total selec tivity of the nano-composite material for glucose against the inter fering agents can be provided, as previously shown, by either coating the sensing material with a thin layer of Nafion as an effec tive perm-selective membrane [18] or by dispersing Nafion solu tion in the sensing material [12].…”

Section: Glucose (Mm)supporting

confidence: 70%

A silicon nanoparticle-based polymeric nano-composite material for glucose sensing

Liu

Nayfeh

Yau

2011

Journal of Electroanalytical Chemistry

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Section: Glucose (Mm)supporting

confidence: 70%

A silicon nanoparticle-based polymeric nano-composite material for glucose sensing

Liu

Nayfeh

Yau

2011

Journal of Electroanalytical Chemistry

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“…The enediol group permits the donation of one or two electrons, forming monodehydroascorbate (MDHA) and dehydroascorbate (DHA), respectively [36]. The ASC redox potential ranges from +0.40 to +0.50 V [38,39]; thus, the molecule can directly donate electrons to reactive oxygen species (ROS), such as singlet oxygen, superoxide anions, and hydroxyl radicals, as well as to tocopheroxyl radicals (Figure 1) [36]. Being able to reduce tocopheroxyl radicals, ASC is indirectly involved in the scavenging of lipid peroxides and radicals, contributing to the decrease of lipid peroxidation and, consequently, to the protection of membranes [40].…”

Section: Vitamin C As An Antioxidantmentioning

confidence: 99%

Vitamin C in Plants: From Functions to Biofortification

et al. 2019

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Vitamin C (l-ascorbic acid) is an excellent free radical scavenger, not only for its capability to donate reducing equivalents but also for the relative stability of the derived monodehydroascorbate radical. However, vitamin C is not only an antioxidant, since it is also a cofactor for numerous enzymes involved in plant and human metabolism. In humans, vitamin C takes part in various physiological processes, such as iron absorption, collagen synthesis, immune stimulation, and epigenetic regulation. Due to the functional loss of the gene coding for l-gulonolactone oxidase, humans cannot synthesize vitamin C; thus, they principally utilize plant-based foods for their needs. For this reason, increasing the vitamin C content of crops could have helpful effects on human health. To achieve this objective, exhaustive knowledge of the metabolism and functions of vitamin C in plants is needed. In this review, the multiple roles of vitamin C in plant physiology as well as the regulation of its content, through biosynthetic or recycling pathways, are analyzed. Finally, attention is paid to the strategies that have been used to increase the content of vitamin C in crops, emphasizing not only the improvement of nutritional value of the crops but also the acquisition of plant stress resistance.

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“…The typical vibrations in the regions between 1590–1560 cm −1 (1589 cm −1 ) and 1500–1490 cm −1 designated the presence of the of backbone of the PANI, springing from the stretching manners of the quinoid and the benzenoid rings [ 62 , 63 ]. The peaks close to 1300 cm −1 are representative of the stretching vibrations of strong C-N in PANI, while the peaks close to 1100–1160 cm −1 correspond to aromatic C-H in-plane deformation and prominent band close to 790–830 cm −1 is commonly attributed to the out-of-plane bending pattern of aromatic CAH groups in 1, 4-disubstituted aniline units [ 64 , 65 , 66 , 67 ]. This is indicative of the head-to-tail juxtaposition common with PANI.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Characterization and Detection of Lead in Water Using SPCE Modified with BiONPs/PANI

et al. 2021

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The need for constant assessment of river water qualities for both aquatic and other biological survival has emerged a top priority, due to increasing exposure to industrial pollutants. A disposable screen print carbon electrode was modified with a conductive polymer (PANI) and Zn and/or Cu oxides NPs, obtained through bioreduction in citrus peel extracts (lemon and orange), for ultra-sensitive detection of PB2+, in the Crocodile River water sample. The synthesized materials were characterized with Fourier-transform infra-red spectroscopy (FTIR), ultra-violet visible spectroscopy (UV-Vis), and scanning electron microscopy (SEM). The SPC-modified electrodes designated as SPCE/LPE/BiONPs/PANI and SPCE/OPE/BiONPs/PANI were characterized using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) and eventually deployed in the electrochemical detection of PB2+ in water using square wave voltammetry (SWV) technique. The electrochemical responses of the modified electrodes for both CV and EIS in 0.1 M HCl demonstrated enhanced performance relative to the bare SPCE. A detection and quantification limit of 0.494 ppb and 1.647 were obtained at SPCE/LPE/BiONPs/PANI, respectively, while a detection and quantification limit of 2.79 ppb and 8.91 ppb, respectively, were derived from SPCE/OPE/BiONPs/PANI. The relative standard deviations (RSD) for SPC electrode at a 6.04 µM PB2+ analyte concentration was 4.76% and 0.98% at SPCE/LPE/BiONPs/PANI and SPCE/LPE/BiONPs/PANI, respectively. The effect of copper, zinc, iron, cobalt, nickel, and magnesium on the stripping peaks of PB2+ at SPCE/OPE/BiONPs/PANI, showed no significant change except for cobalt, with about 17.67% peak current drop. The sensors were assessed for possible determination of PB2+ in spiked river water samples. The average percentage recovery and RSD calculated were 94.25% and 3.74% (n = 3) at SPCE/LPE/BiONPs/PANI and, 96.70% and 3.71% (n = 3) at SPCE/OPE/BiONPs/PANI, respectively. Therefore, the fabricated sensor material could be used for environmental assessment of this highly toxic heavy metal in the aquatic system

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The electrocatalytic oxidation of ascorbic acid on polyaniline film synthesized in the presence of camphorsulfonic acid

Cited by 106 publications

References 35 publications

A silicon nanoparticle-based polymeric nano-composite material for glucose sensing

A silicon nanoparticle-based polymeric nano-composite material for glucose sensing

Vitamin C in Plants: From Functions to Biofortification

Electrochemical Characterization and Detection of Lead in Water Using SPCE Modified with BiONPs/PANI

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