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Nano in for acetone gas sensor 2 o 3 Powder Preparation Method

An acetone gas sensor and sensor technology, which is applied in chemical instruments and methods, nanotechnology, gallium/indium/thallium compounds, etc., can solve the problems of high cost of powder materials, low surface activity, high difficulty, etc., and achieves low cost and surface. High activity, short cycle effect

Active Publication Date: 2017-10-27
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: provide the nanometer In that is used for acetone gas sensor 2 o 3 The preparation method of the powder adopts the sol-gel method to prepare oxide nano-powder, which overcomes the existing liquid phase synthesis and hydrothermal treatment technology to prepare nano-In 2 o 3 The defects of high cost, difficulty, long cycle and low surface activity of powder materials

Method used

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  • Nano in for acetone gas sensor <sub>2</sub> o <sub>3</sub> Powder Preparation Method
  • Nano in for acetone gas sensor <sub>2</sub> o <sub>3</sub> Powder Preparation Method
  • Nano in for acetone gas sensor <sub>2</sub> o <sub>3</sub> Powder Preparation Method

Examples

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Embodiment 1

[0044] The first step, the preparation of indium salt solution:

[0045] Weigh 1.0×10 -3 mol molar amount of In 2 (SO 4 ) 3 , add deionized water to configure the indium ion concentration to be 1.0×10 - 7 mol / L solution, stirred at 30°C for 1 hour with a magnetic stirrer at a speed of 300 rpm, thus preparing an indium salt solution for use;

[0046] The second step, the preparation of alkali solution:

[0047] Weigh 0.02mol of ammonia water with a mass percentage concentration of 28%, add deionized water to configure NH 4 + The concentration is 1.0×10 -6 mol / L solution, leave it at room temperature for 0.5h, thus prepare the alkali solution for use;

[0048] The third step, preparation of indium oxide precursor:

[0049] Put the alkali solution prepared in the second step into a constant temperature water bath, set the temperature to 30°C, use magnetic stirring at a speed of 300 rpm, inject the indium salt solution prepared in the first step into a glass burette, and...

Embodiment 2

[0070] The first step, the preparation of indium salt solution:

[0071] Weigh 1.0×10 -3 mol molar amount of InCl 3 , add deionized water to configure the indium ion concentration to be 1.0×10 -7 mol / L solution was stirred at 30°C for 1.5h with a magnetic stirrer at a rotation speed of 300-350 rpm to prepare an indium salt solution for use;

[0072] The second step, the preparation of alkali solution:

[0073] Weigh 0.02mol of ammonia water with a mass percentage concentration of 28%, add deionized water to configure NH 4 + The concentration is 1.0×10 -6 mol / L solution, leave it at room temperature for 0.5h, thus prepare the alkali solution for use;

[0074] The third step, preparation of indium oxide precursor:

[0075] Put the alkali solution prepared in the second step into a constant temperature water bath, set the temperature to 30°C, use magnetic stirring at a speed of 300-350 rpm, inject the indium salt solution prepared in the first step into a glass burette, D...

Embodiment 3

[0088] The first step, the preparation of indium salt solution:

[0089] Weigh 1.0×10 -3 mol molar amount of In(NO 3 ) 3 , add deionized water to configure the indium ion concentration to be 1.0×10 - 7 The mol / L solution was stirred at 30°C for 2 hours with a magnetic stirrer at a speed of 300-350 revolutions per minute, thus preparing an indium salt solution for use;

[0090] The second step, the preparation of alkali solution:

[0091] Weigh 0.02mol of ammonia water with a mass percentage concentration of 28%, add deionized water to configure NH 4 + The concentration is 1.0×10 -6 mol / L solution, leave it at room temperature for 0.5h, thus prepare the alkali solution for use;

[0092] The third step, preparation of indium oxide precursor:

[0093] Put the alkali solution prepared in the second step into a constant temperature water bath and set the temperature to 30°C, use magnetic stirring at a speed of 350 rpm, inject the indium salt solution prepared in the first ...

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Abstract

The invention discloses a preparation method of nano In2O3 powder used for an acetone gas-sensitive sensor, and relates to the preparation of nanostructures. Oxide nanopowder is prepared with a sol-gel method. The preparation method comprises the following steps: dropping an indium salt solution in an alkali solution of a water bath with the temperature of 30 DEG C to prepare an indium oxide precursor; standing at a constant temperature in the water bath with the temperature of 30 DEG C; conducting centrifuging and drying, and obtaining indium oxide powder containing crystallized water; performing sintering at a high temperature of 600-800 DEG C in an air condition; and performing grinding and sieving to finally prepare the nano In2O3 powder, and performing sealed dry storage on the nano In2O3 powder for use in the acetone gas-sensitive sensor. According to the method, the defects of high cost, high difficulty, long cycle and low surface activity in the preparation of a nano In2O3 powder material with a liquid phase synthesis and hydro-thermal treatment combined technology at present are overcome.

Description

technical field [0001] Technical scheme of the present invention relates to the manufacture of nanostructure, specifically the nanometer In that is used for acetone gas sensor 2 o 3 Method of powder preparation. Background technique [0002] In recent years, the disease diagnosis technology based on breath analysis has attracted the attention of researchers at home and abroad due to its non-invasiveness, rapidity, simplicity and intelligence. Taking breath analysis-type acetone gas detection for diabetes diagnosis that is widely concerned by people as an example, the gas-sensitive detection equipment is required to have the characteristics of high sensitivity, simple operation, small size, portable intelligence and low price. The gas-sensitive sensor in the corresponding gas-sensitive detection equipment Sensitive materials also need to have the characteristics of high sensitivity, high selectivity, high stability, simple preparation and low cost. [0003] Indium trioxide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G15/00G01N27/00B82Y40/00
CPCC01G15/00C01P2004/03C01P2004/24G01N27/00
Inventor 花中秋武一田学民范超王蒙军王伟田汉民
Owner HEBEI UNIV OF TECH