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Nanocomposite material, glassy carbon composite electrode and method for manufacturing both, electrochemical sensor

A technology of nano-composite materials and composite electrodes, applied in the field of electrode materials, can solve the problems of high cost, long time consumption, low sensitivity, etc.

Active Publication Date: 2022-03-08
CHONGQING UNIV OF EDUCATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of these analytical methods often require tedious sample handling, are time-consuming, costly, and have low sensitivity
[0004] In contrast, the electrochemical method has the advantages of fast response, low cost, and simple operation; however, the existing electrochemical methods can only detect PAR and PAP separately, and there is no suitable composite material that can meet the requirements of electrochemical methods. The modified material of the working electrode of the sensor to realize the simultaneous detection of acetaminophen and p-aminophenol, and the detection results of acetaminophen and p-aminophenol are not affected by each other

Method used

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  • Nanocomposite material, glassy carbon composite electrode and method for manufacturing both, electrochemical sensor
  • Nanocomposite material, glassy carbon composite electrode and method for manufacturing both, electrochemical sensor
  • Nanocomposite material, glassy carbon composite electrode and method for manufacturing both, electrochemical sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Pretreatment of MWNTs

[0049] Take 2 g of MWNTs and put them in the mixed acid mixed with nitric acid and hydrochloric acid with a ratio of 1:3 to reflux for 24 hours to prepare a sample solution, add excess water to the sample solution for repeated washing until the pH value of the sample solution is 7, and then The sample solution was dried in an oven to obtain acidified MWNTs.

[0050] Among them, MWNTs are multi-walled carbon nanotubes, which have the advantages of very high stability, good current carrying capacity, and excellent electronic behavior. The acidification of MWNTs is firstly to remove impurities in MWNTs, and secondly to introduce carboxyl groups (-COOH) on MWNTs, and then form carboxyl functionalized multi-walled carbon nanotubes (MWCNTs-COOH), which can enhance their electron transfer. ability, the electron transfer between the electrode and the electrolyte will be easier, and the dispersibility in aqueous solution will be improved due to the intro...

Embodiment 2

[0062] Pretreatment of MWNTs

[0063] Take 2 g of MWNTs and place them in a mixed acid mixed with nitric acid and hydrochloric acid at a ratio of 1:3 to reflux for 26 hours to prepare a sample solution. Add excess water to the sample solution for repeated washing until the pH value of the sample solution is 7, and then The sample solution was dried in an oven to obtain acidified MWNTs.

[0064] CeO 2 preparation of

[0065] CeO was treated by hydrothermal method 2 For preparation, 5.5gCe(NO 3 )·6H 2 O was dissolved in 100 g of pure water, stirred by magnetic force at room temperature, and NH was added during the stirring process. 4 OH solution until the pH value in the solution was 11 to obtain a gel mixture, followed by washing, drying and calcination to obtain CeO 2 .

[0066] Specifically, the obtained gel mixture is dried in an oven at a temperature of 130° C. for 12.5 hours, and then calcined in a muffle furnace at a high temperature of 560° C. for 4.5 hours.

[0...

Embodiment 3

[0075] Pretreatment of MWNTs

[0076]Take 2 g of MWNTs and place them in a mixed acid mixed with nitric acid and hydrochloric acid at a ratio of 1:3 to reflux for 24.5 hours to prepare a sample solution. Add excess water to the sample solution for repeated washing until the pH value of the sample solution is 7. Afterwards, the sample solution was dried in an oven to obtain acidified MWNTs.

[0077] CeO 2 preparation of

[0078] CeO was treated by hydrothermal method 2 For preparation, 4.8gCe(NO 3 )·6H 2 O was dissolved in 100 g of pure water, stirred by magnetic force at room temperature, and NH was added during the stirring process. 4 OH solution until the pH value in the solution was 11 to obtain a gel mixture, followed by washing, drying and calcination to obtain CeO 2 .

[0079] Specifically, the obtained gel mixture was dried in an oven at a temperature of 122° C. for 11.8 hours, and then calcined in a muffle furnace at a high temperature of 546° C. for 3.8 hours. ...

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Abstract

The invention discloses a nanocomposite material, which comprises the following components in terms of mass parts: (2-3) parts of MWNTs, (1-1.5) parts of CeO 2 , (184‑188) parts of Nafion solution and 1000 parts of ultrapure water; compared with the prior art, the present invention provides a suitable modification material for the working electrode of the electrochemical sensor for simultaneously detecting acetaminophen and p-aminophenol, Utilizes CeO 2 The high catalytic activity of Nafion and Nafion, as well as the synergistic effect between the two and MWNTs, further enhanced the electron transfer ability, and improved the sensitivity and detection efficiency of acetaminophen and p-aminophenol detection.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to a nanocomposite material, a glassy carbon composite electrode, a manufacturing method for the two, and an electrochemical sensor. Background technique [0002] Acetaminophen (Paracetamol, PAR), commonly known as paracetamol, is a commonly used non-steroidal antipyretic analgesic. Because PAR has little stimulating effect on the gastrointestinal tract and mild and long-lasting antipyretic and analgesic effect, it is widely used in clinical practice. However, excessive or long-term use of PAR can cause liver failure and kidney damage in children and adults, and even death in severe cases. Moreover, under inappropriate storage conditions, such as strong acid, strong alkali and high temperature, PAR will be hydrolyzed into p-aminophenol (PAP), and the toxicity of PAP is more obvious compared with PAR. [0003] At present, there are many analytical methods for PAR and PA...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30C09D127/18C09D7/61C09D7/62B82Y30/00
CPCC09D127/18C09D7/61C09D7/62C09D7/70B82Y30/00G01N27/308C08K2003/2213C08K13/04C08K9/02C08K3/041C08K3/22
Inventor 惠俊敏刘曦王存况刚胡世文赖寒石开云
Owner CHONGQING UNIV OF EDUCATION
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