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Submicron tin dioxide fiber, preparation method thereof and soot catalysis application

A tin dioxide, sub-micron technology, applied in the field of semiconductor technology materials, can solve the problems of poor quality of tin oxide fibers, low content of target elements, etc., and achieve excellent catalytic performance, high content of target elements, fluffy structure and morphology Effect

Active Publication Date: 2020-07-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art, especially in the preparation process of the existing tin oxide fiber, a large amount of spinning aids are used to obtain the spinning sol, and electrospinning results in low content of target elements in the spinning sol, and the obtained oxidized The shortcoming of poor tin fiber quality, the present invention utilizes polytin sol precursor method, adopts electrospinning technology, has prepared sub-micron tin dioxide fiber, has excellent soot catalytic performance

Method used

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  • Submicron tin dioxide fiber, preparation method thereof and soot catalysis application
  • Submicron tin dioxide fiber, preparation method thereof and soot catalysis application
  • Submicron tin dioxide fiber, preparation method thereof and soot catalysis application

Examples

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Effect test

Embodiment 1

[0045] A kind of preparation method of submicron tin dioxide fiber, comprises steps as follows:

[0046] (1) Synthesis of tin dioxide fiber precursor

[0047] Weigh 50.0g of anhydrous tin tetrachloride, dissolve it in 100mL of methanol, stir until fully dissolved, then add 10.0g of deionized water, and mark the resulting solution as A solution. Weigh 56.5g of potassium acetate, dissolve it in 300mL of methanol, stir until it is fully dissolved, and mark the obtained solution as solution B. Add solution B dropwise to solution A under ice bath conditions, and the dropping time is 120min. Stir continuously in the medium and continue to stir for 1 hour after the dropwise addition. After stopping the stirring, put the reaction solution into the refrigerator for 12 hours, filter, the precipitate is potassium chloride, concentrate the filtrate to dryness, add an appropriate amount of acetone to fully dissolve, and put the reaction solution into Refrigerate for 12 hours, filter to fu...

Embodiment 2

[0054] As described in Example 1, the difference is that in step (4), the temperature of the tin dioxide precursor fiber is raised to 500° C. at a heating rate of 0.5° C. / min, kept for 3 hours, and cooled naturally. Compared with Example 1, the fiber crystallinity is improved.

Embodiment 3

[0056] As described in Example 1, the difference is that in step (4), the temperature of the tin dioxide precursor fiber is raised to 480° C. at a heating rate of 1.5° C. / min, kept for 2.5 hours, and then cooled naturally.

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Abstract

The invention relates to a submicron tin dioxide fiber, a preparation method thereof and a soot catalysis application. The diameter of the tin dioxide fiber is 400-1200nm, the length-diameter ratio is5000-20000, the use temperature is 400-1200 DEG C, and the tin dioxide fiber belongs to a tetragonal crystal phase, is single-phase tin dioxide and does not have other phases. The preparation methodcomprises the following steps of: carrying out a double decomposition reaction on chloride and acetate of tin to filter out a precipitate and synthesize a polyhydroxytin triacetate precursor, concentrating the precursor to obtain precursor powder, dissolving the precursor powder in a solvent to obtain a spinning sol, carrying out electrostatic spinning to obtain tin dioxide precursor fibers, and carrying out heat treatment to obtain the tin dioxide fiber. The tin dioxide fiber has the advantages of good morphology, low crystallization temperature, high crystallinity, small diameter, difficultpowdering, and stable spinning sol. The fiber has the advantages of small diameter, large specific surface area, fluffy structure and morphology, overcoming of the easy agglomeration problem of a nanoparticle morphology material, and excellent soot catalysis performance.

Description

technical field [0001] The invention relates to a polyhydroxytriacetate tin precursor sol electrospinning method to prepare submicron tin dioxide fiber and its soot catalysis application, which belongs to the field of semiconductor technical materials. Background technique [0002] The crystal structure of tin dioxide can easily deviate from the ideal stoichiometric ratio, forming oxygen vacancies in the crystal lattice, showing the properties of n-type semiconductors. Tin dioxide material is rich in surface defect oxygen, lattice oxygen and high thermal stability, and has been used in gas sensing, humidity sensing, optics, electricity and active catalysis. For example: CN106946285A relates to a fibrous porous tin oxide negative electrode material for lithium batteries and a preparation method. CN101238071B mentions that the sol of zirconia-tin oxide composite colloidal particles is applied to the hard coating agent and optical element on the surface of the plastic lens. C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/10D01F1/10B01J23/14B01J35/06
CPCD01F9/10D01F1/10B01J23/14B01J35/58
Inventor 王新强朱思伦施淑颖许崇贺朱陆益张光辉许东
Owner SHANDONG UNIV