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Method for preparing nanometer Co-Fe prussian-blue complex-carbon nano tube composite hydrogen peroxide sensor

A carbon nanotube composite, Prussian blue technology is applied in the field of preparation of a new type of hydrogen peroxide sensor, which can solve the problems of high detection limit, low detection limit, and poor sensor sensitivity.

Inactive Publication Date: 2011-09-07
LANZHOU UNIVERSITY
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the previous H 2 o 2 The shortcomings of poor sensor sensitivity and high detection limit provide a method for preparing a nano-Co-Fe Prussian blue complex-carbon nanotube composite hydrogen peroxide sensor with high sensitivity and low detection limit

Method used

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  • Method for preparing nanometer Co-Fe prussian-blue complex-carbon nano tube composite hydrogen peroxide sensor
  • Method for preparing nanometer Co-Fe prussian-blue complex-carbon nano tube composite hydrogen peroxide sensor
  • Method for preparing nanometer Co-Fe prussian-blue complex-carbon nano tube composite hydrogen peroxide sensor

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Embodiment 1

[0031] (1) Preparation of Co-Fe Prussian blue complex nanoparticles: After adding 3.55 g of sodium 2-ethylhexyl succinate sulfonate to 20 mL (13.86 g) of isooctane (or cyclohexane) (ten Hexaalkyltrimethylammonium bromide or polyethylene glycol octylphenyl ether), then add 4.5336g to a concentration of 0.03mol L -1 CoCl 2 Solution, stirred until clear; use a micro-syringe to add dropwise 1.9426g concentration of 0.014mol L -1 K 3 Fe(CN) 6 and a concentration of 0.006 mol L -1 CsCl solution with a drop rate of 20 μL / min; magnetic stirring at constant temperature for 11 hours, aging for 11 hours; repeated centrifugation washing with ethanol aqueous solution and absolute ethanol to remove impurities, and finally dispersing the product with ethanol to obtain Co-Fe Prussian blue complex nano particle.

[0032] (2) Surface pretreatment of glassy carbon electrodes: First, immerse glassy carbon electrodes with a diameter of 3mm in dilute sulfuric acid to activate them, and ...

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Abstract

The invention discloses a method for preparing a nanometer Co-Fe prussian-blue complex-carbon nano tube composite hydrogen peroxide sensor, which comprises the following steps of: a, preparing Co-Fe prussian-blue complex nano particles; b, performing surface pretreatment on a glassy carbon electrode; c, mixing the Co-Fe prussian-blue complex nano particles and an acidized multi-walled carbon nano tube ultrasonically for 30 to 60 minutes; and d, dropping and coating the ultrasonically-mixed solution in the step c on the glassy carbon electrode, and drying by using an infrared lamp to obtain the novel hydrogen peroxide sensor. In the nanometer Co-Fe prussian-blue complex-carbon nano tube composite hydrogen peroxide sensor prepared by the method, the linear range response to H2O2 is between 1 micrometer and 1.1 millimeters, the detection limit is 0.25 micrometer, and the sensitivity is 255 micro A mM<-1>cm<-2>, so the method is high in sensitivity and low in detection limit.

Description

technical field [0001] The invention relates to a preparation method of a novel hydrogen peroxide sensor, in particular to a preparation method of a nanometer Co-Fe Prussian blue complex-carbon nanotube composite hydrogen peroxide sensor. Background technique [0002] h 2 o 2 It is widely used in the fields of textile, papermaking, chemical industry, food, environmental protection and medicine, and it will inevitably remain in the product or be discharged into the environment, but H 2 o 2 It is a chemical substance harmful to human health, so H 2 o 2 Sensitive detection is of great significance in industries such as food, medicine and textiles. Due to the advantages of simple, rapid and cheap electrochemical detection, the application of peroxidase-modified electrodes for the determination of H 2 o 2 method is favored. However, the stability of peroxidase is poor, and it is easy to fall off from the electrode, so its application is greatly limited. [0003] Studies...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26
Inventor 方建王文娟杨长福王宏奎赵继华沈伟国
Owner LANZHOU UNIVERSITY
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