Tungsten-doped stannic oxide sol nanocrystalline and preparing method thereof

A tin dioxide and tungsten doping technology, which is applied in the field of nanomaterials, can solve problems such as difficult removal of chloride ion impurities, and achieve high dispersion, easy access to process raw materials, and simple processes

Inactive Publication Date: 2016-05-04
PANZHIHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation of tin dioxide nanomaterials in this patent mainly uses SnCl 4 , SnCl 2 and other raw materials, which will introduce chlo

Method used

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  • Tungsten-doped stannic oxide sol nanocrystalline and preparing method thereof
  • Tungsten-doped stannic oxide sol nanocrystalline and preparing method thereof
  • Tungsten-doped stannic oxide sol nanocrystalline and preparing method thereof

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Example Embodiment

[0026] Example 1

[0027] Weigh 0.02mol stannous oxalate and 0.02mol oxalic acid in a 100mL beaker, add 60mL deionized water, add 0.02mol hydrogen peroxide with a concentration of 30% under agitation, and react for 40min to form a transparent solution; add 0.0002mol tungsten to the solution Powder; After fully dissolving, place the above solution in a 100mL autoclave, and place the reaction kettle at 180℃ for 48h; after the reaction is completed, take out the reaction kettle and put it at room temperature. The product is washed and replaced with ethanol solvent to obtain grass Green tungsten-doped tin dioxide sol nanocrystals form a very stable sol state after 30 minutes of ultrasound. The zeta potential value of the tungsten-doped tin dioxide sol nanocrystal prepared in this embodiment is -44.7 mV, indicating that the product has good dispersibility. The measured solid content of the sample was 5%, indicating that a tungsten-doped tin dioxide sol nanocrystal with high dispersib...

Example Embodiment

[0033] Example 2

[0034] Weigh 0.01mol of stannous oxalate and 0.008mol of oxalic acid in a 100mL beaker, add 50mL of deionized water, add 0.01mol of hydrogen peroxide with a concentration of 30% under stirring, and react for 30 minutes to form a transparent solution; add 0.00012mol of tungsten to the solution Powder; After fully dissolving, put the above solution in a 100mL autoclave, and place the reaction kettle at 200℃ for 24h; after the reaction is completed, take out the reaction kettle and put it at room temperature. The product is washed and replaced with methanol solvent to obtain grass The green tungsten-doped tin dioxide sol nanocrystals form an extremely stable sol state after 20 minutes of ultrasound, and the solid content in methanol reaches 6%. The zeta potential value of the tungsten-doped tin dioxide sol nanocrystals prepared in this embodiment is -37.4 mV, indicating that the product has good dispersibility.

Example Embodiment

[0035] Example 3

[0036] Weigh 0.025mol of stannous oxalate and 0.03mol of oxalic acid in a 100mL beaker, add 60mL of deionized water, add 0.02mol of hydrogen peroxide with a concentration of 30% under stirring, and react for 60min to form a transparent solution; add 0.003mol of tungsten to the solution Powder; After fully dissolving, place the above solution in a 100mL autoclave, and place the reaction kettle at 210°C for 72h; after the reaction is complete, take out the reaction kettle and let it reach room temperature. The product is washed and replaced with isopropanol solvent. The grass-green tungsten-doped tin oxide sol nanocrystals are obtained, which form an extremely stable sol state after 30 minutes of ultrasound, and the solid content in isopropanol reaches 4.5%. The zeta potential value of the tungsten-doped tin dioxide sol nanocrystal prepared in this embodiment is -38.3 mV, indicating that the product has good dispersibility.

[0037] In summary, the method of the p...

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Abstract

The invention belongs to the field of nanometer materials, and particularly relates to tungsten-doped stannic oxide sol nanocrystalline and a preparing method thereof. The invention aims to provide the preparing method of the tungsten-doped stannic oxide sol nanocrystalline. The preparing method includes the following steps that stannous oxalate and oxalic acid are added into water, hydrogen peroxide is added, after a transparent solution is formed by a reaction system, a tungsten doping agent is added, and the tungsten-doped stannic oxide sol nanocrystalline is obtained through hydro-thermal treatment, washing and solvent replacement. The tungsten-doped stannic oxide sol nanocrystalline which is uniform in particle size, high in dispersity and purity and high in solid content can be obtained without high-temperature calcination; raw materials in the technology are easy to obtain, and the flow path is simple, efficient, high in repeatability and beneficial for industrialization.

Description

technical field [0001] The invention belongs to the field of nanometer materials, in particular to a tungsten-doped tin dioxide sol nanocrystal and a preparation method thereof. Background technique [0002] Tin dioxide is an n-type semiconductor material with good chemical stability and optical anisotropy. It is widely used in gas-sensitive materials, photoelectric materials, lithium-ion battery materials and other fields. into a semiconductor or conductor, improving its conductivity and spectral selectivity, thereby expanding its application range. [0003] There are many studies on the doping of tin dioxide, and the dopants are mainly some metals and non-metals, including fluorine, nitrogen, antimony, indium, nickel, chromium, zinc, etc., but there are few research reports on tungsten-doped tin dioxide , Patent CN103449508A discloses a method of tungsten-doped tin dioxide nanopowder: water-soluble tin salt and tungstate are used as raw materials, added to a solution cont...

Claims

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Application Information

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IPC IPC(8): C01G19/02B82Y30/00
CPCC01G19/02C01P2002/72
Inventor 李玉峰周才龙陈依文张毅万书权陈伦
Owner PANZHIHUA UNIV
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