Enhancing electrochemical and electrocatalytic activities of polyaniline via co-doping with poly(styrene sulfonate) and gold

Tang, Yanhong; Pan, Kexue; Wang, Xiaojian; Liu, Chengbin; Luo, Shenglian

doi:10.1016/j.jelechem.2009.11.034

Cited by 23 publications

(10 citation statements)

References 48 publications

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“…The anodic peak currents for nanocomposite increase linearly with the scan rate, indicating surface controlled process . A broad peak is observed for the sample with the redox potential at around −57 mV which is related to the overlap of two redox processes of leucoemeraldine to emeraldine salt and emeraldine salt to the pernigraniline state …”

Section: Resultssupporting

confidence: 60%

Preparation of agcl/polyaniline nanocomposite in polyvinylalcohol matrix and its electrocatalytic activity

Fathalipour

Massoumi

2015

J of Applied Polymer Sci

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AgCl/polyaniline (PANI) nanocomposite was successfully synthesized in polyvinyl alcohol (PVA) matrix via a two-stage process. Firstly, positively-charged Ag nanoparticles (NPs) were prepared in the presence of 4-aminothiophenole (4-ATP) as stabilizer. Then, polymerization of aniline was carried out in PVA matrix in the presence of Ag NPs, HCl, and ammonium persulfate as oxidant. HCl solution played an important role in the preparation of resulted nanocomposite. Removal or changing of acidic medium to camphorsulfonic acid influenced on the structure and morphology of obtained composites. The composites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy, ultraviolet-visible spectra, and Fourier transform infrared spectroscopy. Moreover, AgCl/PANI/PVA nanocomposite was immobilized on the surface of a glassy carbon electrode and showed enhanced electrocatalytic activity for the oxidation of dopamine (DA) in a neutral solution. The peak currents of differential pulse voltammograms of DA increased linearly with concentration in the ranges of 80-250 lM DA and the detection limit for DA was 17.2 lM.

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Section: Resultssupporting

confidence: 60%

Preparation of agcl/polyaniline nanocomposite in polyvinylalcohol matrix and its electrocatalytic activity

Fathalipour

Massoumi

2015

J of Applied Polymer Sci

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“…The presence of this peak indicates that PANI in the nanocomposite is in the conductive state. 40,41 No distinct absorption peak was observed for the surface plasmon resonance of Au nanostructures. This may be either due to the overlapping of the absorption band of PANI and SPR of Au or due to the masking of the absorption band of Au by PANI.…”

Section: Resultsmentioning

confidence: 98%

Gold_core–polyaniline_shell composite nanowires as a substrate for surface enhanced Raman scattering and catalyst for dye reduction

et al. 2015

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“…由于 AuNP 被羧基或磺酸基所改性, 使其能有效地掺杂 PANI, 从而使这类纳米复合物的电化学活性可扩展至中性环境. 此外, 这方面的研究也有涉及 PANI 的三元复合物的 , 如 PANI/AuNP/PSS [87] 和 CNT/PANI/AuNP [88] . 但这些 PANI 的三元复合物似乎并未显示出比二元复合物更好的电化学活性, 且 AuNP 在其中的作用机制尚不清楚.…”

Section: 金纳米粒子复合unclassified

Electroactivity of Polyaniline in High pH Solutions

Ye¹,

Lv²,

Hu³

et al. 2013

Acta Chim. Sinica

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Generally, the redox activity of polyaniline (PANI) can only be retained in acidic media at pH＜4, because the occurrence of deprotonation of the nitrogen atoms in the PANI backbone at high pH values may result in the loss of conductivity and electroactivity in neutral or alkaline solutions. This high acidity requirement greatly limits its potential applications like biosensor, marine antifouling and anticorrosion, where neutral or alkaline environments must be faced. Much effort has been exerted in the development of approaches to overcome this issue. In summary, two principal strategies have been proposed to shift the electroactivity of PANI to a high pH environment. One is based on a mechanism of protonic acid doping, the other is based on a charge transfer process. The former is to introduce acidic groups into the PANI chains or PANI systems to hinder the deprotonation of its conducting form and thus to preserve its electroactivity at higher pH values. The main approaches to introduction of acidic groups include the sulfonation of the emeraldine base of PANI, the homopolymerization of aniline derivatives with acidic ionogenic groups or the copolymerization of aniline and aniline derivatives, and the formation of PANI complexes by doping with macromolecular acids. The latter is to use a hybrid film fabricated by incorporating conductive nanomaterials into a PANI matrix, which can improve the charge transfer rate across the PANI matrix and facilitate its redox processes. The development of PANI nanocomposites prepared by doping with carbon nanotubes, graphenes and Au nanoparticles, etc., falls into this category. This review article provides an overview of various approaches to preserve the electroactivity of PANI in high pH solutions on the basis of the two main strategies. Special emphasis is placed on the synthetic methods and electrochemical features for the self-doped, polymer acid-doped and CNT-doped PANIs, including their underlying mechanisms for achieving good electroactivity. The main challenges and future research directions in this field are also discussed.

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Enhancing electrochemical and electrocatalytic activities of polyaniline via co-doping with poly(styrene sulfonate) and gold

Cited by 23 publications

References 48 publications

Preparation of agcl/polyaniline nanocomposite in polyvinylalcohol matrix and its electrocatalytic activity

Preparation of agcl/polyaniline nanocomposite in polyvinylalcohol matrix and its electrocatalytic activity

Gold_core–polyaniline_shell composite nanowires as a substrate for surface enhanced Raman scattering and catalyst for dye reduction

Electroactivity of Polyaniline in High pH Solutions

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Enhancing electrochemical and electrocatalytic activities of polyaniline via co-doping with poly(styrene sulfonate) and gold

Cited by 23 publications

References 48 publications

Preparation of agcl/polyaniline nanocomposite in polyvinylalcohol matrix and its electrocatalytic activity

Preparation of agcl/polyaniline nanocomposite in polyvinylalcohol matrix and its electrocatalytic activity

Goldcore–polyanilineshell composite nanowires as a substrate for surface enhanced Raman scattering and catalyst for dye reduction

Electroactivity of Polyaniline in High pH Solutions

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Gold_core–polyaniline_shell composite nanowires as a substrate for surface enhanced Raman scattering and catalyst for dye reduction