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Neodymium and antimony codoped stannic oxide nano-powder and preparation and application thereof

A technology of tin dioxide and nanopowder, which is applied in the direction of tin oxide, antimony oxide/antimony hydroxide/antimony oxyacid, and measuring devices, can solve the problem of low sensitivity of acetone gas and achieve excellent gas sensitivity, particle size The effect of small diameter and uniform particle size distribution

Active Publication Date: 2016-12-14
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for improving the sensitivity of tin dioxide by co-doping with neodymium and antimony in view of the shortcomings of the existing tin dioxide that is not sensitive to acetone gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take tin chloride, antimony chloride, neodymium nitrate and ethanol (the mol ratio of tin chloride and neodymium nitrate is 1:0.1; The mol ratio of tin chloride and ethanol is 1:40; The mol ratio of tin chloride and antimony chloride Molar ratio is 1:0.1), at first tin chloride is added in the ethanol, stirs to make it fully dissolve; Then add neodymium nitrate in this solution, stir to make it fully dissolve; Next antimony chloride is added in the above-mentioned ethanol solution, Stir to dissolve it, then raise the temperature of the solution to a certain temperature (70°C) and keep it for a period of time (1 hour), then adjust the pH to 7 by adding ammonia water to obtain a solid powder, which is centrifugally washed, dried and dried at a high temperature After calcining at 800°C for a certain period of time (1 hour), the neodymium-antimony co-doped tin dioxide can be obtained.

[0017] The powder prepared in this example is dispersedly coated on the gas sensor test ...

Embodiment 2

[0019] Take by weighing tin chloride, antimony chloride, neodymium nitrate and ethanol (the mol ratio of tin chloride and neodymium nitrate is 1:0.2; The mol ratio of tin chloride and ethanol is 1:50; The mol ratio of tin chloride and antimony chloride Molar ratio is 1:0.05), at first tin chloride is added in the ethanol, stirs to make it fully dissolve; Then add neodymium nitrate in this solution, stir to make it fully dissolve; Next antimony chloride is added in the above-mentioned ethanol solution, Stir to dissolve it, then raise the temperature of the solution to a certain temperature (80°C) and keep it for a period of time (2 hours), and then adjust the pH to 7 by adding ammonia water to obtain a solid powder, which is centrifugally washed, dried and dried at a high temperature After calcining at 700°C for a certain period of time (3 hours), the neodymium-antimony co-doped tin dioxide can be obtained.

[0020] The powder prepared in this example is dispersedly coated on t...

Embodiment 3

[0022] Take by weighing tin chloride, antimony chloride, neodymium nitrate and ethanol (the mol ratio of tin chloride and neodymium nitrate is 1:0.05; The mol ratio of tin chloride and ethanol is 1:60; The mol ratio of tin chloride and antimony chloride Molar ratio is 1:0.2), at first tin chloride is added in the ethanol, stirs to make it fully dissolve; Then add neodymium nitrate in this solution, stir to make it fully dissolve; Next antimony chloride is added in the above-mentioned ethanol solution, Stir to dissolve it, then raise the temperature of the solution to a certain temperature (60°C) and keep it for a period of time (0.5 hours), then adjust the pH to 7 by adding ammonia water to obtain a solid powder, which is centrifugally washed, dried and dried at high temperature After calcining at 900°C for a certain period of time (0.5 hours), the neodymium-antimony co-doped tin dioxide can be obtained.

[0023] The powder obtained in this example is dispersedly coated on the...

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PUM

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Abstract

The invention relates to a preparation method of neodymium and antimony codoped stannic oxide nano-powder. The preparation method comprises the steps that stannic chloride, antimony chloride, neodymium nitrate and ethyl alcohol are weighed, and stannic chloride is added into ethyl alcohol; neodymium nitrate is added into a solution, and stirring is conducted for sufficient dissolution; antimony chloride is added into the above-mentioned solution, and stirring is conducted for sufficient dissolution; the solution is warmed up, warming is kept for a period of time, ammonia water is dropwise added to adjust the PH to be about 7 so as to obtain solid powder, the solid powder is subjected to centrifugal washing, drying and high-temperature calcination, and neodymium and antimony codoped stannic oxide is obtained. Neodymium and antimony codoped stannic oxide obtained through the method is small in particle size and uniform in particle size distribution and has the excellent gas-sensitive sensitivity to acetone.

Description

technical field [0001] The invention belongs to the field of nano-powder preparation, and in particular relates to a preparation method of neodymium-antimony co-doped tin dioxide nano-powder. Background technique [0002] Tin dioxide is white, light yellow or light gray tetragonal, hexagonal or orthorhombic powder. Due to the adjustable pore structure, high specific surface area and strong ion exchange performance of tin dioxide nanomaterials, it is beneficial for the reactants to react at the active site during the catalytic process, and the H 2 The detection of S, ethanol, acetone, formaldehyde and other gases has shown great application prospects, so tin oxide nanostructure materials are widely used as sensitive materials for gas sensors. The gas sensor prepared with it has high sensitivity and is widely used in the detection and forecast of various combustible gases, environmental pollution gases, industrial waste gases and harmful gases. For example, humidity-sensitiv...

Claims

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Application Information

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IPC IPC(8): C01G19/02G01N33/00
CPCC01G19/02C01G30/005C01P2004/82G01N33/0036
Inventor 何丹农徐少洪张春明林琳陈超王艳丽金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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