Method for preparing poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) composite modified electrode

A technology for modifying electrodes and composite electrodes, applied in the direction of electrochemical variables of materials, etc., can solve the problems of rarely applied biological and chemical sensors, easy expansion and fragmentation, instability, etc., and achieve improved sensitivity, low detection limit, and response time. short effect

Inactive Publication Date: 2012-08-01
JIANGXI SCI & TECH NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the PEDOT:PSS film obtained by drop coating or casting is very unstable when soaked in water system, and is easy to swell and crack, which makes it rarely used in the field of biological and chemical sensors (T.Y. Dai, X.J. Jiang, S.H. Hua, X.S. Wang, Y. Lu, Chem. Commun. 2008, 36, 1359-1363)

Method used

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  • Method for preparing poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) composite modified electrode
  • Method for preparing poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) composite modified electrode
  • Method for preparing poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) composite modified electrode

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Effect test

Embodiment 1

[0011] A preparation method of PEDOT:PSS composite modified electrode, comprising the following steps:

[0012] 1. Preparation of PEDOT:PSS-Nafion mixture: Stir 1mL of 1.3% PEDOT:PSS aqueous dispersion for 48 hours, then add 10μL of 5% Nafion solution by ultrasonic mixing to obtain PEDOT:PSS-Nafion mixture ;

[0013] 2. Preparation of PEDOT:PSS-Nafion composite electrode: apply the PEDOT:PSS-Nafion mixture on the surface of the electrode, and let it dry naturally to obtain the PEDOT:PSS-Nafion composite electrode;

[0014] 3. Preparation of PEDOT:PSS composite modified electrode: The prepared PEDOT:PSS-Nafion composite electrode was prepared in the hydrophobic ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate or 1-butyl-3-methyl In imidazole hexafluorophosphate, a conventional three-electrode system was used for cyclic voltammetry scanning, the electrode was washed with twice distilled water, and the PEDOT:PSS-Nafion composite modified electrode was prepared after na...

Embodiment 2

[0017] The steps are the same as in Example 1, except that in step 1, during the preparation of the PEDOT:PSS-Nafion mixture, 1mL of PEDOT with a mass fraction of 1.3%:PSS and 0.835% single-armed carbon nanotube dispersion are first pressed Mixed at a volume ratio of 1:1 or mixed with 4% multi-armed carbon nanotube dispersion at a volume ratio of 5:1 and stirred for 48 hours, then added 10 μL of 5% Nafion solution by ultrasonic mixing to obtain a PEDOT:PSS-Nafion mixture . The PEDOT:PSS-Nafion composite modified electrode prepared by this method can be used for the detection of vitamin C, quinone isomers, hydrogen peroxide, etc.

Embodiment 3

[0019] The steps are the same as in Example 1, except that in step 1, during the preparation of the PEDOT:PSS-Nafion mixture, 1 mL of PEDOT with a mass fraction of 1.3%:PSS and 8 mM metal nanoparticles (such as 15 nm nanoparticles Gold particles) 10 μL was dispersed, mixed and stirred for 48 hours, and then 10 μL of 5% Nafion solution was added and ultrasonically mixed to obtain a PEDOT:PSS-Nafion mixture. The PEDOT:PSS-Nafion composite modified electrode prepared by the method can be used for the detection of hydroquinone isomers, auxin, roxithromycin and the like.

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Abstract

The invention discloses a method for preparing a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) composite modified electrode. The method comprises the following steps of: uniformly mixing PEDOT:PSS aqueous dispersion liquid and Nafion, which are taken as raw materials, and then directly dispensing a mixture on the surface of a composite modified electrode; and in the conventional three-electrode system, performing secondary electrochemical doping by using hydrophobic ionic liquid, and thus obtaining the PEDOT:PSS composite modified electrode which is high in water resistance and high in conductivity. The PEDOT:PSS composite modified electrode which is prepared by the method fully combines the film-forming property of the PEDOT:PSS aqueous dispersion liquid, the adhesion characteristic, biological compatibility and anti-interference characteristic of the Nafion, high conductivity and hydrophobicity of the ionic liquid and the electrochemical catalysis characteristic of a nanometer material, can be applied to electrochemical biosensors or electrochemical sensors, is directly applicable to electrochemical detection of auxin, roxithromycin, vitamin C, benzenediol isomer, organophosphorus, glucose, hydrogen peroxide and the like, and has the characteristics of good detection effect, short response time, high water resistance, wide linear range, high sensitivity, high anti-interference, high stability and the like.

Description

technical field [0001] The invention relates to a preparation method of a PEDOT:PSS composite modified electrode. Background technique [0002] Poly(3,4-ethylenedioxythiophene): polystyrenesulfonic acid (PEDOT: PSS) is a commercially available aqueous dispersion of conductive polymers. It is the most successful intrinsically conductive polymer used today. PEDOT: PSS film has excellent mechanical properties, good thermal stability and processability, high transparency and electrical conductivity, low cost and other advantages, which makes it widely used in antistatic coatings, electronic conductive coatings, thermoelectric materials, Supercapacitors, Organic Light Emitting Diodes, Organic Thin Film Transistors, Organic Solar Cells and many others (Y.H. Kim, C. Sachse, M.L. Machala, C. May, L. Müller-Meskamp K. Leo, Adv. Funct. Mater. 2011, 21, 1009-1009). However, the PEDOT:PSS film obtained by drop coating or casting is very unstable when soaked in water system, and is ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
Inventor 徐景坤文阳平姚媛媛张龙张鸥
Owner JIANGXI SCI & TECH NORMAL UNIV
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