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Three-dimensional layered Co-Al double hydroxide composite material and preparation method and application thereof

A hydroxide and composite material technology, applied in the analysis of materials, material resistance, material analysis by electromagnetic means, etc., can solve the problem of high cost of sensors, achieve improved sensitivity, high gas sensitivity and response speed, and simple preparation method Effect

Inactive Publication Date: 2018-12-21
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is in order to solve existing NO x To solve the problem of high sensor cost, a preparation method and application of a three-dimensional layered CoAl double metal hydroxide composite material are provided

Method used

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  • Three-dimensional layered Co-Al double hydroxide composite material and preparation method and application thereof
  • Three-dimensional layered Co-Al double hydroxide composite material and preparation method and application thereof
  • Three-dimensional layered Co-Al double hydroxide composite material and preparation method and application thereof

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specific Embodiment approach 1

[0033] Embodiment 1: In this embodiment, the three-dimensional layered CoAl double metal hydroxide composite material is made of cobalt nitrate, aluminum nitrate, ammonium fluoride and a precipitating agent; the precipitating agent is an aqueous urea solution.

[0034] This embodiment has the following beneficial effects:

[0035] 1. The three-dimensional layered CoAl double metal hydroxide composite material in this embodiment has a rich layer structure, and the layers form a flower-like composite material. The flower-like layered double metal hydroxide has a larger specific surface area and can provide more There are more active sites to react with gas molecules, and there are certain pores between the flower-like layered double hydroxide layers, which is conducive to the gas molecules entering into it for reaction; therefore, the flower-like layered bimetallic hydroxide The hydroxide nanostructure has higher gas sensitivity and response speed, which can improve the sensitiv...

specific Embodiment approach 2

[0039]Embodiment 2: This embodiment differs from Embodiment 1 in that the molar ratio of cobalt nitrate to aluminum nitrate is (1-4):1. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0040] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the molar ratio of aluminum nitrate to ammonium fluoride is 1: (5-15). Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a three-dimensional layered Co-Al double hydroxide composite material and a preparation method and application thereof, relates to a double hydroxide composite material and a preparation method and application thereof, and aims at solving the problem that the cost of an existing NOx sensor is high. The three-dimensional layered Co-Al double hydroxide composite material is prepared from cobalt nitrate, aluminum nitrate, ammonium fluoride and a precipitating agent. The preparation method comprises the steps that the raw materials are weighed and put into deionized water toobtain a mixed solution, the mixed solution is subjected to a hydrothermal reaction, obtained precipitates are subjected to impurity removal, washing and drying, and then the three-dimensional layered Co-Al double hydroxide composite material is obtained. The three-dimensional layered Co-Al double hydroxide composite material is high in sensitivity, short in response time, simple in preparation method, good in capacity of resisting interference of the external environment and low in cost and has the adsorption reversibility. The preparation method is suitable for preparing the three-dimensional layered Co-Al double hydroxide composite material.

Description

technical field [0001] The invention relates to a double metal hydroxide composite material and its preparation method and application. Background technique [0002] With the continuous progress of social development, air pollution in cities is becoming more and more serious, especially nitrogen oxides. As we all know, nitrogen oxides are a type of typical air pollutants. Nitrogen oxides can stimulate the lungs of the human body and cause irresistible respiratory diseases; nitrogen oxides can react with moisture in the air to form acid rain; and Other pollutants produce photochemical smog under certain conditions, which poses a great threat to the environment and human health. [0003] Therefore, the development of various types of gas sensors for rapid and accurate detection of toxic and harmful nitrogen oxides at room temperature is very important for human life, production, etc. and environmental protection. Due to the presence of abundant ions in the unique layer struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/125
Inventor 李丽刘志史克英
Owner HEILONGJIANG UNIV
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