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Preparation method and application of zirconium dioxide/porous polyaniline modified electrode

A technology of zirconium dioxide and modified electrodes, which is applied in the direction of material electrochemical variables, can solve the problems of poor chemical/physical stability of enzymes or antibodies, and achieve good catalytic performance, wide linear range, and low detection line.

Inactive Publication Date: 2014-12-24
NORTHWEST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this sensor can achieve high sensitivity, it is difficult to detect in harsh environments such as acidic, organic solvents and high temperatures due to the poor chemical / physical stability of enzymes or antibodies
Therefore, it is still a great challenge to develop a fast, cheap, reliable and sensitive method for the detection of organophosphorus pesticides.

Method used

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  • Preparation method and application of zirconium dioxide/porous polyaniline modified electrode
  • Preparation method and application of zirconium dioxide/porous polyaniline modified electrode
  • Preparation method and application of zirconium dioxide/porous polyaniline modified electrode

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Embodiment 1

[0031] Preparation method of zirconium dioxide / porous polyaniline modified electrode

[0032] Instruments and reagents used in this embodiment:

[0033] CHI832 electrochemical analyzer (Shanghai Chenhua Instrument Co., Ltd.) was used for square wave voltammetry experiment; Ag / AgCl reference electrode (Shanghai Ridao Scientific Instrument Co., Ltd.); electronic balance (Beijing Sartorius Instrument Co., Ltd.) was used for weighing Quantitative drugs; JSM-6701F cold field emission scanning electron microscope (Japan Electronics Co., Ltd.) was used for morphology characterization; aluminum oxide grinding powder (0.30 μm, 0.05 μm, Shanghai Chenhua Instrument Reagent Co., Ltd.) was used to process glassy carbon electrodes; Aniline (purity 99.78%), zirconium oxychloride, sulfuric acid, potassium perchlorate (Tianjin Kaixin Chemical Industry Co., Ltd.), high-purity nitrogen (purity 99.999%, O 2 ≤0.001%).

[0034] The specific operation steps are as follows:

[0035] a) Befor...

Embodiment 2

[0040] Zirconium dioxide / porous polyaniline modified electrodes (ZrO 2 -3D PANI / GCE) on the electrochemical performance of methyl parathion

[0041] Zirconium dioxide / porous polyaniline modified electrode in KClO dissolved with methyl parathion 4 The solution was plotted by square wave voltammetry.

[0042] From figure 2It can be seen that compared with zirconium dioxide and porous polyaniline modified electrode, zirconium dioxide / porous polyaniline modified electrode has a good catalytic effect on the detection of methyl parathion, and in the process of reducing methyl parathion ZrO2 / Porous Polyaniline Synergy for Electrocatalysis of Methylparathion.

[0043] From image 3 It can be seen that the zirconia / porous polyaniline modified electrode has high sensitivity to the electrochemical reduction of methyl parathion, and the detection linear range is 5.964×10 -10 nM to 1.020×10 -8 nM, the detection limit is 2.991×10 -10 nM.

[0044] From Figure 4 It can...

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Abstract

The invention discloses a preparation method of a zirconium dioxide / porous polyaniline modified electrode. The preparation method comprises the following steps: (1) dispensing a silicon dioxide microsphere layer on a glass carbon electrode subjected to cleaning treatment and airing at the room temperature; (2) soaking the electrode modified in the step (1) in a 0.25M phenylamine and 0.6M sulfuric acid solution and performing electropolymerization to form a polyaniline film layer; (3) soaking the electrode modified in the step (2) in an HF solution for etching for 45min, and washing with a great amount of water; and (4) soaking the electrode modified in the step (3) in a 5mM ZrOCl2 solution containing 0.1M KCl, performing electro-deposition to form a ZrO2 nano particle layer, and washing with the water to obtain the zirconium dioxide / porous polyaniline modified electrode. The zirconium dioxide / porous polyaniline modified electrode is prepared by the electropolymerization and the electro-deposition, and compared with the other methods, the method for preparing the zirconium dioxide / porous polyaniline modified electrode is simple, rapid, economic and effective.

Description

technical field [0001] The invention relates to a method for preparing a zirconium dioxide / porous polyaniline modified electrode and the application of the modified electrode. Background technique [0002] Conductive polyaniline, due to its cheap raw materials, simple preparation, good stability in the air, high and adjustable conductivity, has become one of the hotspots in theoretical research and practical applications. Ordered porous polyaniline has the characteristics of huge surface area and regular pore arrangement, and has shown broad application prospects in chemical industry, biomedicine, environmental protection and other fields, so it has received more and more attention. Polyaniline / transition metal oxide composite material is an important method to modify polyaniline materials, but the preparation process of this material is complicated at present, and the particle size of metal nanoparticles in the obtained material is not uniform, and the quality needs to be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48
Inventor 卢小泉王永兰毕青袁彩霞张帆马琳琳
Owner NORTHWEST NORMAL UNIVERSITY
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