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Preparation method of nano-cerium oxide sensor material

A nano-cerium oxide and sensor technology, applied in chemical instruments and methods, nano-carbon, rare earth metal oxides/hydroxides, etc., can solve problems such as poor stability, lower response temperature, and low sensitivity of gas sensors

Inactive Publication Date: 2018-07-06
SUZHOU NANER MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a method for preparing a nano-cerium oxide sensor material. The invention combines three-dimensional graphene with nickel oxide, which helps to improve the surface morphology of nickel oxide, fully exerts the synergistic effect of three-dimensional graphene and heterojunction, and overcomes metal Oxide Semiconductor NO 2 The low sensitivity, slow response speed, and poor stability of the gas sensor enhance the sensitivity of the sensor detection; the preparation process of this method is simple, and the response efficiency is improved by increasing the specific surface area of ​​the material and the surface active vacancies, and the response temperature is reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The chemical vapor deposition method of graphene / aluminum foam composite material is used. The specific steps are: put the aluminum foam into the heating zone of the vacuum reaction furnace, vacuumize and heat at the same time, inject hydrogen into the vacuum reaction furnace, and heat to a predetermined temperature of 100 °C Finally, keep the temperature constant for 10 minutes, then anneal, and then heat to the predetermined temperature of 900°C, then put the carbon source into the vacuum reactor while keeping the hydrogen flow constant, turn off the gas after 50 minutes of growth and lower it to room temperature, you can get direct The substrate on which graphene is deposited, i.e. graphene / aluminum foam composite.

[0018] The graphene / foamed aluminum composite material is soaked in the etching solution, and after the foamed aluminum substrate is completely dissolved, a three-dimensional graphene material is obtained; the etching solution is ferric chloride or ferric...

Embodiment 2

[0024] The chemical vapor deposition method of graphene / aluminum foam composite material is used. The specific steps are: put the aluminum foam into the heating zone of the vacuum reaction furnace, vacuumize and heat at the same time, inject hydrogen into the vacuum reaction furnace, and heat to a predetermined temperature of 500 °C Finally, keep the temperature constant for 30 minutes, then anneal, and then heat to a predetermined temperature of 1100°C, then put the carbon source into the vacuum reactor while keeping the hydrogen flow constant, turn off the gas after 100 minutes of growth and lower it to room temperature, and you can get direct The substrate on which graphene is deposited, i.e. graphene / aluminum foam composite.

[0025] The graphene / foamed aluminum composite material is soaked in an etching solution, and after the foamed aluminum substrate is completely dissolved, a three-dimensional graphene material is obtained; the etching solution is an iron nitrate soluti...

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Abstract

The invention discloses a preparation method of a nano-cerium oxide sensor material. According to the preparation method of the nano-cerium oxide sensor material, three-dimensional graphene and nickeloxide are combined, which helps to improve the surface morphology of the nickel oxide, and a synergistic effect of the three-dimensional graphene and a heterogenous junction is fully played; the problems of low sensitivity, low response speed, poor stability and the like of a metal-oxide semiconductor NO2 gas sensor are solved; the detecting sensitivity of the sensor is enhanced; the method is simple in preparation process; the response efficiency is improved and the response temperature is decreased by improving the specific area and the surface activity vacancy of a material.

Description

technical field [0001] The invention relates to the field of sensor manufacturing, in particular to a method for preparing a nano cerium oxide sensor material. Background technique [0002] With the rapid development of science and technology and social economy, it has also brought a heavy burden to the natural environment. Air pollution seriously restricts the sustainable development of human beings. Industrial production produces a large amount of toxic and harmful gases, which not only pollute the environment and destroy the ecology, but also endanger the health and safety of life. Therefore, it is of great significance to detect the composition and concentration of toxic gases in the environment. [0003] So far, based on transition metal oxides such as nickel oxide (NiO), cobalt oxide (Co3O4), cuprous oxide (Cu2O), zinc oxide (ZnO), manganese dioxide (MnO2) and nickel cobaltate (NiCo2O4) as modified electrodes Sensitive materials have been studied in the field of sens...

Claims

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Application Information

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IPC IPC(8): C01B32/184C01F17/00
CPCC01F17/206C01P2004/80
Inventor 不公告发明人
Owner SUZHOU NANER MATERIAL TECH CO LTD