CN102645461A - Preparation method of electrochemical sensor based on polyaniline nanofiber - Google Patents
Preparation method of electrochemical sensor based on polyaniline nanofiber Download PDFInfo
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- CN102645461A CN102645461A CN2012100916235A CN201210091623A CN102645461A CN 102645461 A CN102645461 A CN 102645461A CN 2012100916235 A CN2012100916235 A CN 2012100916235A CN 201210091623 A CN201210091623 A CN 201210091623A CN 102645461 A CN102645461 A CN 102645461A
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Abstract
The invention relates to a preparation method of an electrochemical sensor based on polyaniline nanofiber. The preparation method comprises the following steps of: firstly, preparing polyaniline nanofiber; then, dispersing the purified polyaniline nanofiber under ultrasonic oscillation into deionized water to form green suspension; and coating 10uL of water solution of the polyaniline nanofiber on the surface of a glass carbon electrode, and drying to obtain a modified electrode so as to prepare the electrochemical sensor based on polyaniline nanofiber. The sensor prepared by the invention shows high electro-catalysis activity to the reduction of nitrite ion, has high sensitivity, wide linear range, low detection limit and good stability, and provides a new way for monitoring the reaction process of ascorbic acid and nitrite ion.
Description
Technical field:
The present invention relates to a kind of preparation method of electrochemical sensor, relate in particular to and a kind ofly be used for accurately detecting nitrite and monitor the preparation method that ascorbic acid is removed the nitrite ion reaction delicately based on the electrochemical sensor of polyaniline nano fiber.
Background technology:
Conducting polymer is such as polyaniline, polypyrrole, polythiophene with gather styrene, by research widely, because they all have potential using value in electronics, electroluminescence, optoelectronic device and analytical chemistry field.In all conjugated type macromolecules, polyaniline is the most attractive conducting polymer, because it has high electric conductivity, simple preparation method, good environmental stability and in the application widely in electrochemical sensor field.In recent years, a lot of researchs have all concentrated on the polyaniline of nanostructured.Polyaniline with traditional is compared, and the polyaniline of nanostructured also has between big specific surface area, high reactivity and nanofiber and has a lot of spaces except having above-mentioned advantage.Therefore, the electrochemical sensor based on polyaniline has significant sensitivity and selectivity.
Because have toxicity and by inference people's health had carcinogenicity, nitrite ion (NO
2 -) concentration to detect be very important.Though there have been a lot of methods to be used for detecting nitrite ion, such as spectroscopic methodology and chromatography, but still exist not enough: at first being that sensitivity and selectivity are not high, secondly is that the practical application performance has much room for improvement.After develop the nitrite ion sensor, therefore in numerous nitrite ion sensors, electrochemical sensor has the characteristics of rapid reaction, high sensitivity and miniaturization, has attracted more attention.If electromotive force is suitable, polyaniline compound can be oxidized or reduction because it has electronically active.When being arranged, the content of the Cr (VI) of researcher in analyzing seawater finds nitrite ion juvenescence on the electrode that polyaniline film is modified.In recent years, the researcher has designed the electrochemical sensor that different types of polyaniline film modifies and has detected nitrite ion.But, also be not studied based on simple, the sensitive electrochemical sensor of polyaniline nano fiber electrode and be used for detecting nitrite ion.
Ascorbic acid (AA, vitamin C) often is widely applied at food oxydating resistance, makes up a prescription and cosmetic field.Research shows that ascorbic acid has potential importance in prevention aspect the cancer of the stomach, because therefore the ability that it has reduction nitrous acid suppresses the formation of nitrogenous nitroso compound (NOC) in people's the stomach.Reaction between ascorbic acid AA and nitrite ion or the nitrous acid is typical redox reaction, reacts required pH＜5, after the reaction, obtains dehydrogenation AA and nitrogen monoxide (NO).Therefore, a kind of simple method fast of development is monitored ascorbic acid and is removed the reaction of nitrite ion and be necessary.
Summary of the invention:
The present invention is directed to the deficiency of prior art, provide a kind of and be used for accurately detecting nitrite and detect the preparation method that ascorbic acid is removed the nitrite ion reaction delicately based on the electrochemical sensor of polyaniline nano fiber.
Its making step is following:
(1) the preparation process of polyaniline nano fiber: earlier the aniline with 0.298g joins in the HCl solution of 10ml 1.0mol/L, with 0.186g ammonium persulfate (APS, (NH
4)
2S
2O
8) be dissolved in the HCl solution of 10ml 1.0mol/L the preparation initiator solution; With the disposable monomer solution that is poured into of initiator solution, through polyreaction at room temperature static state carry out 10min, to the polyaniline sediment that obtains filter, washing five times, 50 ℃ of following vacuum drying 24h then;
(2) polyaniline nano fiber is modified the preparation of electrochemical sensor: glassy carbon electrode elder generation is with α-Al of 1.0,0.3 and 0.05 μ m
2O
3The powder polishing, ultrasonic cleaning in deionized water and acetone soln continuously then, clean electrode is used the nitrogen fluidized drying immediately; The polyaniline nano fiber of purifying is distributed under ultrasonic concussion and forms green suspending liquid in the deionized water, the dry then electrode that obtains modifying of the WS of the polyaniline nano fiber of past glassy carbon electrode surface-coated 10 μ L.
Said monomer solution is: the HCl solution of aniline, APS/ aniline are 1: 4.
The present invention utilizes polyaniline nano fiber to be the basis; Designed the electrochemical sensor that a kind of easy, sensitive being used to detects nitrite ion; This sensor shows very strong electro catalytic activity to the reduction of nitrite ion, and has the stability that high sensitivity, the wide range of linearity, low detectability are become reconciled; In addition, the sensor based on nanofiber provides a new approach for the course of reaction between monitoring ascorbic acid and the nitrite ion.
Embodiment:
In order to deepen, the present invention is made further detailed description below in conjunction with implementing to understanding of the present invention.
A kind of preparation method of the electrochemical sensor based on polyaniline nano fiber, its step is following:
(1) the preparation process of polyaniline nano fiber: earlier the aniline with 0.298g joins in the HCl solution of 10ml1.0mol/L, with 0.186g ammonium persulfate (APS, (NH
4)
2S
2O
8) be dissolved in the HCl solution of 10ml 1.0mol/L the preparation initiator solution; With the disposable monomer solution (the HCl solution of aniline, APS/ aniline are 1: 4) that is poured into of initiator solution, through polyreaction at room temperature static state carry out 10min, to the polyaniline sediment that obtains filter, washing five times, 50 ℃ of following vacuum drying 24h then;
(2) polyaniline nano fiber is modified the preparation of electrochemical sensor: glassy carbon electrode elder generation is with α-Al of 1.0,0.3 and 0.05 μ m
2O
3The powder polishing, ultrasonic cleaning in deionized water and acetone soln continuously then, clean electrode is used the nitrogen fluidized drying immediately; The polyaniline nano fiber of purifying is distributed under ultrasonic concussion and forms green suspending liquid in the deionized water, the dry then electrode that obtains modifying of the WS of the polyaniline nano fiber of past glassy carbon electrode surface-coated 10 μ L.
Claims (2)
1. preparation method based on the electrochemical sensor of polyaniline nano fiber is characterized in that:
Preparation process is following:
(1) the preparation process of polyaniline nano fiber: the aniline with 0.298g joins in the HCl solution of 10ml 1.0mol/L earlier, the 0.186g ammonium persulfate is being dissolved in the HCl solution of 10ml 1.0mol/L the preparation initiator solution; With the disposable monomer solution that is poured into of initiator solution, through polyreaction at room temperature static state carry out 10min, to the polyaniline sediment that obtains filter, washing five times, 50 ℃ of following vacuum drying 24h then;
(2) polyaniline nano fiber is modified the preparation of electrochemical sensor: glassy carbon electrode elder generation is with α-Al of 1.0,0.3 and 0.05 μ m
2O
3The powder polishing, ultrasonic cleaning in deionized water and acetone soln continuously then, clean electrode is used the nitrogen fluidized drying immediately; The polyaniline nano fiber of purifying is distributed under ultrasonic concussion and forms green suspending liquid in the deionized water, the dry then electrode that obtains modifying of the WS of the polyaniline nano fiber of past glassy carbon electrode surface-coated 10 μ L.
2. the preparation method of a kind of electrochemical sensor based on polyaniline nano fiber according to claim 1, it is characterized in that: said monomer solution is: the HCl solution of aniline, APS/ aniline are 1: 4.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063721A (en) * | 2012-12-13 | 2013-04-24 | 浙江大学 | Solid nitrite ion electrode based on conductive polyaniline and preparing method thereof |
| CN103399073A (en) * | 2013-08-15 | 2013-11-20 | 无锡百灵传感技术有限公司 | Preparation method of electrochemical sensor based on PPy (polypyrrole) coated manganese nanowire for hydrogen peroxide detection |
| CN104634848A (en) * | 2015-01-25 | 2015-05-20 | 浙江大学 | Nitrite electrochemical sensor and manufacturing method thereof |
| CN108642885A (en) * | 2018-05-25 | 2018-10-12 | 晋江瑞碧科技有限公司 | The Preparation method and use of activated carbon/polyaniline-p-phenylenediamine copolymer composite nano fiber |
| CN110776808A (en) * | 2019-11-13 | 2020-02-11 | 上海师范大学 | Anti-corrosion self-repairing coating material based on micro-nano container and preparation method thereof |
| CN111272842A (en) * | 2020-02-25 | 2020-06-12 | 衡阳师范学院 | Polyaniline modified electrode for quantitatively detecting estrone and preparation method and application thereof |
| CN113345723A (en) * | 2021-04-30 | 2021-09-03 | 上海交通大学 | Porous graphene/polyaniline composite film and preparation method and application thereof |
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| CN101545885A (en) * | 2009-05-07 | 2009-09-30 | 重庆大学 | Method for testing electrochemical performance of polyaniline synthesized by chemical method |
| CN102051047A (en) * | 2010-11-19 | 2011-05-11 | 南京邮电大学 | Method for preparing carbon nitride tube-polyaniline-gold composite material and application method thereof |
| CN102243203A (en) * | 2011-06-13 | 2011-11-16 | 暨南大学 | Anti-oxidation sensor and preparation method hereof |
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| CN101545885A (en) * | 2009-05-07 | 2009-09-30 | 重庆大学 | Method for testing electrochemical performance of polyaniline synthesized by chemical method |
| CN102051047A (en) * | 2010-11-19 | 2011-05-11 | 南京邮电大学 | Method for preparing carbon nitride tube-polyaniline-gold composite material and application method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063721A (en) * | 2012-12-13 | 2013-04-24 | 浙江大学 | Solid nitrite ion electrode based on conductive polyaniline and preparing method thereof |
| CN103399073A (en) * | 2013-08-15 | 2013-11-20 | 无锡百灵传感技术有限公司 | Preparation method of electrochemical sensor based on PPy (polypyrrole) coated manganese nanowire for hydrogen peroxide detection |
| CN104634848A (en) * | 2015-01-25 | 2015-05-20 | 浙江大学 | Nitrite electrochemical sensor and manufacturing method thereof |
| CN108642885A (en) * | 2018-05-25 | 2018-10-12 | 晋江瑞碧科技有限公司 | The Preparation method and use of activated carbon/polyaniline-p-phenylenediamine copolymer composite nano fiber |
| CN108642885B (en) * | 2018-05-25 | 2020-12-01 | 晋江瑞碧科技有限公司 | Preparation method and application of activated carbon/polyaniline-p-phenylenediamine copolymer composite nanofiber |
| CN110776808A (en) * | 2019-11-13 | 2020-02-11 | 上海师范大学 | Anti-corrosion self-repairing coating material based on micro-nano container and preparation method thereof |
| CN110776808B (en) * | 2019-11-13 | 2021-11-30 | 上海师范大学 | Anti-corrosion self-repairing coating material based on micro-nano container and preparation method thereof |
| CN111272842A (en) * | 2020-02-25 | 2020-06-12 | 衡阳师范学院 | Polyaniline modified electrode for quantitatively detecting estrone and preparation method and application thereof |
| CN111272842B (en) * | 2020-02-25 | 2022-09-30 | 衡阳师范学院 | Polyaniline modified electrode capable of quantitatively detecting estrone and preparation method and application thereof |
| CN113345723A (en) * | 2021-04-30 | 2021-09-03 | 上海交通大学 | Porous graphene/polyaniline composite film and preparation method and application thereof |
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Application publication date: 20120822 |