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A kind of submicron tin dioxide fiber and its preparation method and soot catalytic application

A tin dioxide and sub-micron technology, applied in the field of semiconductor technology materials, can solve the problems of low content of target elements and poor quality of tin oxide fibers, and achieve the effect of overcoming the problem of easy agglomeration, thin fiber diameter and sufficient contact

Active Publication Date: 2021-04-20
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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  • A kind of submicron tin dioxide fiber and its preparation method and soot catalytic application
  • A kind of submicron tin dioxide fiber and its preparation method and soot catalytic application
  • A kind of submicron tin dioxide fiber and its preparation method and soot catalytic 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 the application of soot catalysis. The tin dioxide fiber has a diameter of 400-1200nm, an aspect ratio of 5000-20000, and a service temperature of 400-1200°C. It belongs to a tetragonal crystal phase and is a single-phase tin dioxide without other phases. The preparation method includes: using tin chloride and acetate to filter out the precipitate to synthesize polyhydroxytin triacetate precursor through metathesis reaction, concentrating to obtain precursor powder, dissolving in solvent to obtain spinning sol, and electrospinning to obtain tin dioxide Precursor fiber, tin dioxide fiber is obtained by heat treatment. The tin dioxide fiber of the invention has the advantages of good appearance, low crystallization temperature, high crystallinity, fine diameter, difficult pulverization and stable spinning sol. The fiber diameter is thin, the specific surface area is large, and the structure and shape of the fiber are fluffy, which overcomes the problem of easy agglomeration of nano-particle shape materials, and has excellent soot catalytic 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 Patents(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