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Preparation method of In2O3 nanoparticles/MoO3 nanorod composite materials

A technology of nanoparticles and composite materials, applied in nanotechnology, nanotechnology, analytical materials, etc.

Inactive Publication Date: 2016-05-04
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as far as we know, gas-sensing materials composited by indium oxide and molybdenum oxide have never been reported

Method used

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  • Preparation method of In2O3 nanoparticles/MoO3 nanorod composite materials
  • Preparation method of In2O3 nanoparticles/MoO3 nanorod composite materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) A certain amount of ammonium molybdate tetrahydrate was weighed and calcined at 400°C for 3 hours to obtain molybdenum oxide powder;

[0020] (2) Weigh 6g of the prepared molybdenum oxide powder and dissolve it in 40mL of 30% hydrogen peroxide, stir to dissolve it completely, add 25mL of concentrated nitric acid and 187mL of deionized water into the above mixed solution. Stir to make the mixed solution change from a yellow suspension to a transparent and clear yellow solution;

[0021] (3) Take 35mL of the above mixed solution and transfer it to a 50mL reactor, and conduct a hydrothermal reaction at 150°C for 40h;

[0022] (4) Use a centrifuge to separate the solid-liquid product after the hydrothermal reaction, wash the solid product with deionized water and ethanol several times, place the solid product in a drying oven, and dry it at 60°C ;

[0023] (5) Weigh 0.020g of indium nitrate and dissolve it in 100mL of deionized water, and stir evenly. Weigh a certain...

Embodiment 2

[0026] (1) Weigh a certain amount of ammonium molybdate tetrahydrate and calcinate it at 500°C for 3 hours to obtain molybdenum oxide powder;

[0027] (2) Weigh 6.4g of the prepared molybdenum oxide powder and dissolve it in 50mL of 30% hydrogen peroxide, stir to dissolve it completely, add 26mL of concentrated nitric acid and 176mL of deionized water into the above mixed solution. Stir to make the mixed solution change from a yellow suspension to a transparent and clear yellow solution;

[0028] (3) Take 35mL of the above mixed solution and transfer it to a 50mL reactor, and conduct a hydrothermal reaction at 160°C for 45h;

[0029] (4) Use a centrifuge to separate the solid-liquid product after the hydrothermal reaction, wash the solid product with deionized water and ethanol several times, place the solid product in a drying oven, and dry it at 60°C ;

[0030](5) Weigh 0.022g of indium nitrate and dissolve it in 100mL of deionized water, and stir evenly. Weigh a certain ...

Embodiment 3

[0033] (1) Weigh a certain amount of ammonium molybdate tetrahydrate and calcinate it at 500°C for 4 hours to obtain molybdenum oxide powder;

[0034] (2) Weigh 6.8g of the prepared molybdenum oxide powder and dissolve it in 55mL of 30% hydrogen peroxide, stir to dissolve it completely, add 25mL of concentrated nitric acid and 172mL of deionized water into the above mixed solution. Stir to make the mixed solution change from a yellow suspension to a transparent and clear yellow solution;

[0035] (3) Take 35mL of the above mixed solution and transfer it to a 50mL reactor, and conduct a hydrothermal reaction at 170°C for 50h;

[0036] (4) Use a centrifuge to separate the solid-liquid product after the hydrothermal reaction, wash the solid product with deionized water and ethanol several times, place the solid product in a drying oven, and dry it at 60°C ;

[0037] (5) Weigh 0.024g of indium nitrate and dissolve it in 100mL of deionized water, and stir evenly. Weigh a certain...

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Abstract

The invention provides a preparation method of In2O3 nanoparticles / MoO3 nanorod composite materials. The preparation method concretely comprises the following steps that ammonium molybdate tetrahydrate, hydrogen peroxide and concentrated nitric acid are used as raw materials; after calcining treatment and hydrothermal reaction, rodlike molybdena gas sensitive materials are obtained; further, indium nitrate is used as raw materials; granular indium oxide is loaded on the surface of rodlike molybdena; finally, In2O3 nanoparticles / MoO3 nanorod composite gas sensitive materials are obtained. The method has the advantages that the production process is simple; the obtained gas sensitive materials have a heterogeneous structure formed by indium oxide and molybdenum oxide; higher sensitivity and fast response and recovery on trimethylamine are shown; the method can be used in the field of a trimethylamine gas sensor, so that the novel gas sensitive material with high sensitivity is obtained.

Description

technical field [0001] The present invention relates to a kind of In 2 o 3 Nanoparticles / MoO 3 The invention relates to a preparation method of a nanorod composite material, which belongs to the technical field of preparation technology of advanced nanometer functional materials. Background technique [0002] Most of the gas-sensitive materials used in gas sensors are metal oxide semiconductors. Its working principle is to detect one or several gases by changing the resistance of the semiconductor oxide by adsorbing gas on the surface of the semiconductor oxide or reacting with the gas. Because the semiconductor metal oxide gas sensor has many advantages such as high sensitivity, fast response recovery time, simple circuit and operation, and low price, it is widely used in various fields such as medical treatment, aviation, home life, and gas emission detection. . Among these metal oxides, molybdenum oxide is an important n-type semiconductor, and its band gap is about 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/02B82Y30/00B82Y40/00G01N27/12
CPCC01G39/02C01P2002/72C01P2002/85C01P2004/04C01P2004/16G01N27/127
Inventor 张苏闫慧慧宋鹏王琦李嘉
Owner UNIV OF JINAN
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