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a kind of sno 2 Nanotube gas-sensing material and its preparation method and application

A technology of gas-sensing materials and nanotubes, which is applied in the field of SnO2 nanotube gas-sensing materials and its preparation, can solve the problems of difficult repeated processing and batch processing, cumbersome steps, and high energy consumption, and achieves low cost, simple manufacturing method, and simplified The effect of the machining process

Active Publication Date: 2020-07-28
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Based on this, it is used to solve the problems of high energy consumption, many raw materials, cumbersome steps, difficult repeated processing and batch processing in the process of preparing one-dimensional nano gas-sensitive materials in the prior art

Method used

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  • a kind of sno <sub>2</sub> Nanotube gas-sensing material and its preparation method and application
  • a kind of sno <sub>2</sub> Nanotube gas-sensing material and its preparation method and application
  • a kind of sno <sub>2</sub> Nanotube gas-sensing material and its preparation method and application

Examples

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Effect test

Embodiment 1

[0031] Add 1.55g of stannous sulfate into a quartz Erlenmeyer flask, then add 100mL of sulfuric acid solution with a mass concentration of 2%, and ultrasonically dissolve it at 60Hz; fill the bottle with nitrogen to create an oxygen-free environment, and apply it on the mouth of the bottle Vaseline, to play the role of isolating the air; put the conical flask in a dark place, and put two 8w, 254nm ultraviolet lamps on the liquid surface of the conical flask; after 12 hours of light, clean the conical flask with a clean glass Pick up the film on the liquid surface of the bottle, transfer the film to the surface of deionized water, rinse it for 15 minutes, pour it into a centrifuge tube and wash it by centrifugation for 3 times, and take the precipitate after centrifugation to obtain the gas-sensitive material.

Embodiment 2

[0033] Add 1.55g of stannous sulfate to a quartz Erlenmeyer flask, then add 100mL of sulfuric acid solution with a mass concentration of 2%, and ultrasonically dissolve it at 60Hz; fill the bottle with nitrogen to create an anaerobic environment, and apply Vaseline on the mouth of the bottle , to play the role of isolating the air; put the Erlenmeyer flask in a dark place, and put two 8w, 254nm ultraviolet lamps on the liquid surface of the Erlenmeyer flask; Pick up the membrane on the surface, transfer the membrane to the surface of deionized water, rinse it for 15 minutes, pour it into a centrifuge tube and wash it by centrifugation for 3 times; heat the centrifuged material in a water bath at 70°C for 1 hour, and wash it by centrifugation for 3 times. The precipitation is to obtain the gas-sensitive material.

Embodiment 3

[0035] Add 1.55g of stannous sulfate to a quartz Erlenmeyer flask, then add 100mL of sulfuric acid solution with a mass concentration of 2%, and ultrasonically dissolve it at 60Hz; fill the bottle with nitrogen to create an anaerobic environment, and apply Vaseline on the mouth of the bottle , to play the role of isolating the air; put the Erlenmeyer flask in a dark place, and put two 8w, 254nm ultraviolet lamps on the liquid surface of the Erlenmeyer flask; Pick up the membrane on the surface, transfer the membrane to the surface of deionized water, rinse it for 15 minutes, pour it into a centrifuge tube and wash it by centrifugation for 3 times; heat the centrifuged material in a water bath at 70°C for 4.5 hours, and wash it by centrifugation for 3 times. The precipitation is to obtain the gas-sensitive material.

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Abstract

The invention belongs to the technical field of gas sensing materials, and particularly relates to a SnO2 nanotube gas sensing material, and a preparation method and an application thereof. The preparation method comprises the following steps: carrying out a photochemical reaction to obtain a metal Sn nanorod, oxidizing the surface of the nanorod by a water bath process to obtain a Sn-SnO2 core-shell structure nanorod, and carrying out acid etching to remove the metal Sn in order to obtain the SnO2 nanotube gas sensing material. The preparation method solves the problems of dependence on hightemperature and a surfactant and difficult repeated production of the preparation of a one-dimensional gas sensing nanomaterial in the prior art. The preparation method has the advantages of mildness,simplicity in operation, low cost, high easiness in mass production, and high yield, and improves the defects of high energy consumption, many raw materials, complicated steps and difficult repeatedprocessing and batch processing in the processing process of existing one-dimensional gas sensing nanomaterial, so the processing flow of a gas sensor is simplified, and the obtaining of the stable and efficient gas sensor is facilitated.

Description

technical field [0001] The invention belongs to the technical field of gas sensitive materials, in particular to a SnO 2 Nanotube gas-sensing material and its preparation method and application. Background technique [0002] In daily life, toxic gases produced by combustion, explosion, leakage, etc., such as: NO x , SO x , CO, H 2 etc. diffuse in the air, seriously affecting people's healthy life. especially NO 2 , when its concentration is greater than 20ppm, it will cause poisoning. The means and methods for detecting harmful gases have long been put on the agenda, and the society’s demand for monitoring is also increasing. Many scientists have focused on developing gas sensors with high selectivity and high sensitivity. In recent years, researchers have done in-depth research in the field of gas-sensitive sensor materials, especially paying attention to semiconductor gas-sensitive materials, such as SnO 2 , ZnO, WO 3 , CuO, Fe 2 o 3 Etc., through physical adsorp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
CPCG01N33/0009
Inventor 孙丰强郑玉建辛颖儿赵咏佩邓嘉欣谭颖
Owner SOUTH CHINA NORMAL UNIVERSITY