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One-dimensional nanocomposite metal oxide gas-sensing material and preparation method thereof

A nanocomposite, gas-sensitive material technology, applied in the field of one-dimensional nanocomposite metal oxides, can solve the problems of one-dimensional nanomaterials that are rarely reported, and achieve the effects of simple steps, less energy consumption for synthesis, and easy-to-obtain materials

Active Publication Date: 2018-01-12
ANHUI UNIVERSITY OF ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on one-dimensional nanomaterials combining zinc oxide and tin oxide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A. Prepare zinc chloride with deionized water into a zinc salt solution with a concentration of 0.4mol / L, and take 20ml and place it in a stirred reactor.

[0021] B. prepare the tin chloride solution of 0.4mol / L with deionized water;

[0022] C. Prepare NaOH with deionized water to form a NaOH solution with a concentration of 2.0mol / L.

[0023] D. Mix the zinc chloride solution obtained in step A with the tin chloride solution obtained in step B to obtain a mixed solution; then slowly add the NaOH solution prepared in step C dropwise to the zinc chloride and tin chloride under stirring In the mixed solution, until the molar ratio of zinc ions and hydroxide ions in the solution is 1:7, and the molar ratio of tin ions and hydroxide ions is 1:7, weigh an equal volume of absolute ethanol according to the volume of the mixed solution Mix with the reaction solution, and continue magnetic stirring for 15 minutes, add an appropriate amount of cetyltrimethylammonium bromide at...

Embodiment 2

[0025] A. Zinc chloride is mixed with deionized water to be the zinc salt solution that concentration is 0.2mol / L, gets 20ml and is placed in the reactor with stirring;

[0026] B. prepare the tin chloride solution of 0.2mol / L with deionized water;

[0027] C. Prepare NaOH with deionized water to form a NaOH solution with a concentration of 1.0mol / L.

[0028] D. Mix the zinc chloride solution obtained in step A with the tin chloride solution obtained in step B to obtain a mixed solution; then slowly add the NaOH solution prepared in step C dropwise to the zinc chloride and tin chloride under stirring In the mixed solution, until the molar ratio of zinc ions and hydroxide ions in the solution is 1:6, and the molar ratio of tin ions and hydroxide ions is 1:6, weigh an equal volume of absolute ethanol according to the volume of the mixed solution Mix with the reaction solution, and continue magnetic stirring for 20 minutes, add an appropriate amount of tetradecyltrimethylammoniu...

Embodiment 3

[0030] A. Zinc chloride is mixed with deionized water to be the zinc salt solution that concentration is 0.3mol / L, gets 20ml and is placed in the reactor with stirring;

[0031] B. prepare the tin chloride solution of 0.3mol / L with deionized water;

[0032] C. Prepare NaOH with deionized water to form a NaOH solution with a concentration of 3.0mol / L.

[0033] D. Mix the zinc chloride solution obtained in step A with the tin chloride solution obtained in step B to obtain a mixed solution; then slowly add the NaOH solution prepared in step C dropwise to the zinc chloride and tin chloride under stirring In the mixed solution, until the molar ratio of zinc ions and hydroxide ions in the solution is 1:8, and the molar ratio of tin ions and hydroxide ions is 1:8, weigh an equal volume of absolute ethanol according to the volume of the mixed solution Mix with the reaction liquid, and continue magnetic stirring for 30 minutes, add an appropriate amount of cetyltrimethylammonium chlor...

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Abstract

The invention provides a one-dimensional nanometer complex metal oxide gas-sensitive material and a preparation method thereof. The preparation method comprises the following steps: mixing a zinc chloride solution and a tin chloride solution, carrying out a hydro-thermal reaction between the mixed solution and a sodium hydroxide solution, adding anhydrous ethanol and a surfactant and controlling reaction conditions so as to prepare a one-dimensional nanometer zinc oxide and tin oxide composite material. In comparison with an existing preparation method of a one-dimensional nanometer metal oxide material, the preparation method of the invention has advantages of low cost, simple operation and low energy consumption and the like. The prepared nanocomposite material has gas sensitivity to gases such as methane, carbon monoxide, nitrogen dioxide and the like, and is a good gas-sensitive material.

Description

technical field [0001] The invention relates to the field of gas-sensing materials, in particular to a gas-sensing material compounded of zinc oxide and tin oxide. The material has high gas-sensing performance and is a one-dimensional nanocomposite metal oxide. Background technique [0002] The one-dimensional nanostructure refers to the fact that the three-dimensional orientation of the material has one dimension longer than the nanoscale, and the morphology of the one-dimensional nanomaterials is relatively diverse. According to the literature [1] "Progress in Materials Science Volume 52, Issue 5, July2007, Pages 699- 913", such as nanowires, nanotubes, nanoribbons, nano-branches, etc., all belong to one-dimensional nano-morphology. One-dimensional tin oxide nanomaterials have strong surface effects and quantum effects, are stable in structure at high temperatures, are not suitable for agglomeration, and have a low response temperature to gases and high sensitivity. The c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/02C01G9/02G01N33/00
CPCC01G19/02C01P2004/16C01P2004/30C01P2004/61C01P2004/82G01N33/0004
Inventor 余江应
Owner ANHUI UNIVERSITY OF ARCHITECTURE