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Preparation method and application of graphene-porphyrin modified electrode

A technology for modifying electrodes and graphene, applied in the direction of electrochemical variables of materials, etc., can solve the problems of cumbersome operation, high price and long time consumption of the content method of ascorbic acid, and achieve the effect of good anti-interference performance and high-efficiency detection.

Inactive Publication Date: 2015-11-04
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the problems that the existing methods for detecting the content of ascorbic acid in organisms are cumbersome to operate, takes a long time, and is relatively expensive, and provides a preparation method and application of a graphene-porphyrin modified electrode

Method used

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  • Preparation method and application of graphene-porphyrin modified electrode
  • Preparation method and application of graphene-porphyrin modified electrode
  • Preparation method and application of graphene-porphyrin modified electrode

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specific Embodiment approach 1

[0022] Specific embodiment one: the preparation method of the graphene-porphyrin modified electrode of the present embodiment is specifically carried out according to the following steps:

[0023] 1. Mix 6g natural flake graphite, 5g K 2 S 2 o 8 and 5g P 2 o 5 Mix well, add 24mL concentrated H to the system 2 SO 4 , and then reacted in an oil bath at a temperature of 80° C. for 4.5 hours under stirring conditions to obtain pre-oxidized graphite;

[0024] 2. Cool concentrated sulfuric acid with a volume of 23mL and a mass concentration of 98% to 3.5°C to 5°C with an ice-water bath, and then add 1g of pre-oxidized graphite obtained in step 1 and 3.5g of KMnO under stirring conditions 4 , control the temperature of the system at 4°C to 6°C, then remove the ice-water bath, control the temperature at 35°C, stir for 2 hours, then add 90mL of distilled water, raise the temperature to 98°C and continue to stir for 15min, then dilute with 75mL of distilled water, then add 10 mL ...

specific Embodiment approach 2

[0032] Embodiment 2: This embodiment differs from Embodiment 1 in that the temperature of the distilled water used for dilution in step 2 is 20° C. to 35° C. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0033] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the reaction time in step four is 90min. Others are the same as in the first embodiment.

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Abstract

The invention relates to a manufacturing method of a graphene-porphyrin modified electrode and application of the electrode, aiming to solve the problems of complex operation, long time and relatively high price in the conventional method for detecting the content of ascorbic acid in a living body. The method comprises the following steps: I, preparing pre-oxidized graphene; II, preparing a graphene oxide solid; III, preparing acyl-chlorinated graphene; IV, preparing tetraphenylporphyrin; V, preparing 5-(4-nitro)-10,15,20-triphenyl porphyrin; VI, preparing 5-(4-amino)phenyl-10,15-20-triphenyl porphyrin; VII, preparing a pure manganese porphyrin coordination compound; VIII, preparing a functional composite material of graphene oxide and porphyrin; IX, modifying a glassy carbon electrode. The modified electrode has excellent interference resistance, stability and reproducibility, and can be taken as a biosensor for detecting ascorbic acid in practical samples.

Description

technical field [0001] The invention relates to a preparation method and application of a modified electrode. Background technique [0002] Ascorbic acid (AA), also known as vitamin C, is one of the important vitamins in human life activities. The lack of ascorbic acid in the human body will lead to serious diseases, such as scurvy and cancer. Therefore, it is of great significance to detect the content of ascorbic acid in organisms. At present, the commonly used detection methods include spectrophotometry, fluorescence method, chromatography, etc., but these methods are cumbersome to operate, take a long time, and are relatively expensive. [0003] Graphene is a new type of two-dimensional nanostructured carbon material, specifically described in the Beijing Jiaotong University doctoral thesis "Preparation of Graphene and Its Application in Supercapacitors" published in June 2012. Due to its high conductivity , large specific surface area and superior chemical and mechani...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
Inventor 郭喜明郭斌王飞陈磊
Owner HARBIN INST OF TECH
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