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Sensing material for formaldehyde detection as well as preparation method and application thereof

A technology for sensing materials and formaldehyde, which is applied in the fields of analyzing materials, material resistance, and material analysis by electromagnetic means. Reply, high response sensitivity, fast response effect

Active Publication Date: 2020-06-16
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditional formaldehyde gas sensor has many problems such as poor recovery, high detection limit, high working temperature, complicated manufacturing process, and high energy consumption, which is far from achieving the practical purpose of convenient, quick, and flexible use. Realizing high sensitivity detection of formaldehyde at room temperature has become an important content in the field of semiconductor formaldehyde gas sensors

Method used

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  • Sensing material for formaldehyde detection as well as preparation method and application thereof
  • Sensing material for formaldehyde detection as well as preparation method and application thereof
  • Sensing material for formaldehyde detection as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0033] The sensing material for formaldehyde detection in this embodiment uses graphene oxide as the matrix material, and first uses supramolecular interaction to assemble zinc oxide nanoparticles on graphene oxide to improve the responsiveness and selectivity of the material to formaldehyde gas, and then 5 -Amino-1-naphthalene-sulfonic acid small molecule is doped in the graphene composite material, and the specific synthesis steps are as follows:

[0034] S1, weigh 35mg zinc acetate (Zn(CH) 3 COO) 2 ) was dissolved in 50 mL of methanol, and a uniform dispersion system was obtained by physical stirring;

[0035] S2, adding 5 mL of graphene oxide (GO) dispersion liquid (solvent is water) with a concentration of 1 mg / mL into the dispersion system prepared in step S1, adjusting the pH of the solution to alkaline, and stirring the reaction to assemble the composite through supramolecular The first mixed solution of the supramolecular assembly (ZnO-GO) containing metal oxide and...

Embodiment 2

[0040] A preparation method of a sensing material for formaldehyde detection, comprising the following steps:

[0041] S1, weigh 35mg of tin acetate (Sn(CH) 3 COO) 2 ) was dissolved in 50 mL of methanol, and a uniform dispersion system was obtained by physical stirring;

[0042] S2, adding 10 mL of graphene oxide (GO) dispersion liquid with a concentration of 1 mg / mL into the dispersion system prepared in step S1, adjusting the pH of the solution to alkaline, and stirring the reaction to form a metal-containing oxide through supramolecular assembly and compounding and graphene oxide supramolecular assemblies (SnO 2 - the first mixture of GO);

[0043] S3, add the 5-amino-1-naphthalene-sulfonic acid (ANS) small molecule of 90mg and the hydrazine hydrate solution (concentration is 98%) that accounts for 2 times of graphene oxide mass in the first mixed solution obtained in step S2, And placed in a heating device for heating reaction, the heating temperature is 80 ± 10 ° C, a...

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Abstract

The invention discloses a sensing material for formaldehyde detection as well as a preparation method and an application of the sensing material. The\ preparation method comprises the following stepsof: dissolving a zinc source and / or a tin source in an organic solvent to prepare a metal source solution; adding graphene oxide into the metal source solution, adjusting the pH value of the solutionto be alkaline, and stirring the mixture for reaction to obtain a first mixed solution; adding 5-amino-1-naphthalene-sulfonic acid and a reducing agent into the first mixed solution, and heating the mixture for reaction to obtain a second mixed solution; and carrying out impurity removal treatment on the second mixed solution. According to the preparation method, the adopted raw materials are simple and easy to obtain, the cost is low, and the prepared material can be used for rapid detection of formaldehyde and is high in detection sensitivity and response speed.

Description

technical field [0001] The invention relates to the technical field of gas sensing materials, in particular to a sensing material for formaldehyde detection and a preparation method and application thereof. Background technique [0002] With the progress and development of society, the living standards of the Chinese people are improving day by day, and the living conditions have also been greatly improved. But at the same time, the problem of environmental pollution is becoming more and more serious, and the problem of air pollution is particularly worrying. In China, indoor air pollution is the most serious and common type of decoration. Indoor decoration has become an indispensable process for every urban resident before moving into a new house. Formaldehyde is the primary decoration-type chemical indoor air pollutant in my country. The production of new furniture, the decoration and laying of walls and floors all require the use of adhesives, and the most important poll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/127Y02A50/20
Inventor 王耀范进成周国富
Owner SOUTH CHINA NORMAL UNIVERSITY