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Method for preparing chromium-modified hollow indium oxide with high response to ammonia gas

An indium oxide, hollow technology, applied in chemical instruments and methods, inorganic chemistry, gallium/indium/thallium compounds, etc., can solve the problems of complex preparation methods, high production costs, and industrial production

Inactive Publication Date: 2019-12-06
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country for In 2 o 3 The study of nanomaterials, especially their structure and morphology, is in its infancy, but due to the disadvantages of complex operations and high production costs in the preparation method, it is difficult to put the research results into actual industrial production on a large scale.
In addition, due to the constraints of experimental equipment and production technology, people are currently working on In 2 o 3 The exploration of nanomaterials, especially the exploration of gas-sensing properties, is not very deep

Method used

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  • Method for preparing chromium-modified hollow indium oxide with high response to ammonia gas
  • Method for preparing chromium-modified hollow indium oxide with high response to ammonia gas
  • Method for preparing chromium-modified hollow indium oxide with high response to ammonia gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Put 160 mL of DMF into a clean and dry 250 mL beaker (No. 1) with a graduated cylinder, and put it into a clean magnetic rotor;

[0020] (2) Use a graduated cylinder to take 200 mL of DMF and pour it into another clean and dry 250 mL beaker (No. 2);

[0021] (3) Accurately weigh 200 mg of chromium nitrate hexahydrate with an electronic analytical balance, and add it to the beaker (No. 2);

[0022] (4) Accurately weigh 0.073 g of terephthalic acid and 0.070 g of indium nitrate hydrate with an electronic analytical balance, pour them into a beaker (No. 1) containing DMF, stir on a magnetic stirrer, and pipette Take 0.35 mL of the solution from the beaker (No. 2) into the beaker (No. 1);

[0023] (5) Put the beaker in which the solute is completely dissolved into an oil bath for heating, the condition is set at 120 °C, and keep warm for 30 min after the temperature rises to 120 °C;

[0024] (6) Take out the beaker immediately after heating, let it cool down, and wash...

Embodiment 2

[0027] (1) Put 160 mL of DMF into a clean and dry 250 mL beaker (No. 1) with a graduated cylinder, and put it into a clean magnetic rotor;

[0028] (2) Use a graduated cylinder to take 200 mL of DMF and pour it into another clean and dry 250 mL beaker (No. 2);

[0029] (3) Accurately weigh 200 mg of chromium nitrate hexahydrate with an electronic analytical balance, and add it to the beaker (No. 2);

[0030] (4) Accurately weigh 0.07 g of terephthalic acid and 0.08 g of indium nitrate hydrate with an electronic analytical balance, pour them into a beaker (No. 1) containing DMF, stir on a magnetic stirrer, and pipette Take 0.175mL solution from the beaker (No. 2) into the beaker (No. 1);

[0031] (5) Put the beaker in which the solute is completely dissolved into an oil bath for heating, the condition is set at 120 °C, and keep warm for 50 min after the temperature rises to 120 °C;

[0032] (6) Take out the beaker immediately after heating, let it cool down, and wash the prec...

Embodiment 3

[0035] (1) Put 160 mL of DMF into a clean and dry 250 mL beaker (No. 1) with a graduated cylinder, and put it into a clean magnetic rotor;

[0036] (2) Use a graduated cylinder to take 200 mL of DMF and pour it into another clean and dry 250 mL beaker (No. 2);

[0037] (3) Accurately weigh 200 mg of chromium nitrate hexahydrate with an electronic analytical balance, and add it to the beaker (No. 2);

[0038] (4) Accurately weigh 0.083 g of terephthalic acid and 0.050 g of indium nitrate hydrate with an electronic analytical balance, pour them into a beaker (No. 1) containing DMF, stir on a magnetic stirrer, and pipette Take 2 mL of the solution from the beaker (No. 2) into the beaker (No. 1);

[0039](5) Put the beaker in which the solute is completely dissolved into an oil bath for heating, the condition is set at 120 °C, and keep warm for 30 min after the temperature rises to 120 °C;

[0040] (6) Take out the beaker immediately after heating, let it cool down, and wash the...

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PUM

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Abstract

The invention provides a method for preparing chromium-modified hollow indium oxide with high response to ammonia gas. The preparation method specifically comprises the steps: using N,N-dimethylformamide, terephthalic acid, chromium nitrate hydrate and indium nitrate hydrate as raw materials, and performing an oil bath reaction and calcination treatment so as to obtain indium oxide of a hexagonalhollow box structure. The indium oxide has a porous structure and a large surface area, more oxygen and target gas can be adsorbed effectively, and the utilization rate of the material can be improvedeffectively through the porous structure, so that the sensing performance is improved; therefore, the performance is improved through both the porous structure and hollow structure; and no expensivesurfactants are utilized in the experiment, the cost is low, good gas sensitivity to ammonia gas is achieved, and a long-term application prospect in detection of ammonia gas is achieved.

Description

technical field [0001] The invention relates to a preparation method of chromium-modified hollow indium oxide with high response to ammonia gas, and belongs to the technical field of preparation technology of advanced nanometer functional materials. Background technique [0002] In daily life, when we travel outside, we are deeply harmed by industrial waste gas, vehicle exhaust, PM2.5 and other gases, and at home, we are also affected by toxic gases such as ammonia and stupid. Therefore, research and development of high-performance gas sensors have very important practical significance, whether it is due to the urgent need for environmental pollution gas detection, or the desire to ensure the quality of life and industrial safety. With people's increasing attention to environmental protection and strict monitoring of toxic and harmful gas emissions, various gas detection and early warning devices with different functions have emerged, and have been further industrialized and...

Claims

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Application Information

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IPC IPC(8): C01G15/00B82Y40/00G01N27/12
CPCB82Y40/00C01G15/00C01P2004/03C01P2004/04G01N27/125G01N27/127
Inventor 宋鹏田哲宾王琦梁栋
Owner UNIV OF JINAN