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One-Step Synthesis Of Multi-Component Nanocomposites And Their Electrocatalytic Application

Posted on:2012-02-23Degree:MasterType:Thesis
Country:ChinaCandidate:X ZhangFull Text:PDF
GTID:2131330341450371Subject:Analytical Chemistry
Abstract/Summary:PDF Full Text Request
Nanocomposites is different from the individual components because of its physical and chemical properties and become a research hotspot. Especially in catalysis, biosensors, surface-enhanced Raman detection of such analysis has wide application prospects. Conductive polymer composite materials and precious metals because of the unique structure and optical, electrical, magnetic, and other unique properties, making it energy, information, optoelectronic devices, chemical and biological sensors, electromagnetic shielding, stealth technology and other areas of metal corrosion protection have broad application prospects. Prussian blue has a good electrochemical reversibility, high stability, easy preparation, and preparation and low cost is widely used in the electrochemical modification of electrode materials. Well as electron transfer medium, which reduces material particular peroxide redox electrochemical reaction overpotential.This paper, based on conductive polymers and noble metal composite material properties and special electrocatalytic activity of Prussian blue and a study, including the following:1. Briefly described the characteristics of nano-materials, preparation, application and nano-composite materials, introduces the conductive polypyrrole, polyaniline, gold nanoparticles, Nano Fabrication and Nano to be complex, on the Prussian blue also made a brief Introduction.2. Successfully by one-step synthesis in solution of gold nano-nuclear, PPy and PB as the shell Au-PPy/PB core - shell multi-and nano-composites and PANI shell Au-PANI/PB PB for the core - shell multiple nanocomposites; and possible reaction mechanism proposed by XRD, FTIR, UV-vis, EDS, TEM and other techniques for these types of multiple nano-composite were characterized. The conditions of its preparation have also been selected and optimized, and Au-PPy/PB core - shell nanocomposite modified in multiple electrode to study the electrochemical properties and electrocatalytic properties. Core - shell nanocomposite modified electrode multi-step on hydrogen peroxide and L-cysteine has fast response, high sensitivity and detection limits, and very good stability and reproducibility. 3. Similarly, one-step synthesis of nano-silver as the core, PPy and PB as the shell Ag-PPy/PB core - shell nanocomposite multiple, is a further step synthesis of conducting polymer / noble metal nanoparticles / PB has a certain universal. Ag-PPy/PB synthesis of hydrogen peroxide also has a good response.
Keywords/Search Tags:one-step method, nanocomposites, electrochemical modified electrode, electrochemical catalysis
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