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Preparation method of high temperature stable titanium dioxide nanotube powder

A titanium dioxide, high temperature stable technology, applied in the field of new energy materials and catalytic materials, can solve problems such as fracture, sintering, collapse, etc., and achieve the effects of simple steps, convenient operation and excellent catalytic effect.

Active Publication Date: 2017-05-31
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of titanium dioxide nanotubes is very sensitive to temperature. When the calcination temperature is higher than 400 ° C, the morphology of titanium dioxide nanotubes will sinter, break or even collapse, forming anatase titanium dioxide nanoparticles, which limits its application.

Method used

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  • Preparation method of high temperature stable titanium dioxide nanotube powder
  • Preparation method of high temperature stable titanium dioxide nanotube powder
  • Preparation method of high temperature stable titanium dioxide nanotube powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 6g of anatase titanium dioxide nanopowder into 150mL of sodium hydroxide solution with a concentration of 10moL / L, stir and transfer to a reaction kettle, the hydrothermal reaction temperature is 115°C, the reaction time is 24-36h, and naturally cool to room temperature . Filter and wash with deionized water several times until the pH of the washing solution is ≈7. Pour off the supernatant, add 0.15moL / L hydrochloric acid solution to the above powder, stir or sonicate for 2 hours, wash the acid-treated sample with deionized water several times again until the pH of the washing solution is ≈7, filter, and finally Dry the obtained powder at 50° C., and the product is titanate nanotube powder.

[0033] Disperse 2g titanate nanotubes in 50mL deionized water solution, stir and add glacial acetic acid with a volume fraction of 5% to the solution dropwise until the pH of the solution is ≈ 3, stir at room temperature for 1-2 hours, then add 100mL silane coupling agent KH5...

Embodiment 2

[0035]Add 7g of anatase titanium dioxide nanopowder into 175mL of sodium hydroxide solution with a concentration of 10moL / L, stir and transfer to a reaction kettle, the hydrothermal reaction temperature is 115°C, the reaction time is 20-30h, and naturally cool to room temperature . Filter and wash with deionized water several times until the pH of the washing solution is ≈7. Pour off the supernatant, add 0.1moL / L hydrochloric acid solution to the above powder, stir or sonicate for 2-3 hours, wash the acid-treated sample with deionized water several times until the pH of the washing solution is ≈7, filter , and finally dry the obtained powder at 55° C., and the product is titanate nanotube powder.

[0036] Disperse 1.5g titanate nanotubes in 50-80mL deionized aqueous solution, stir and add glacial acetic acid with a volume fraction of 6-8% dropwise to the solution until the pH value of the solution is 3-4, and stir at room temperature for 1-2h Then add 150mL silane coupling a...

Embodiment 3

[0038] Add 8g of anatase titanium dioxide nanopowder into 180mL of sodium hydroxide solution with a concentration of 10moL / L, stir and transfer to a reaction kettle, the hydrothermal reaction temperature is 120°C, the reaction time is 18-24h, and naturally cool to room temperature . Filter and wash with deionized water several times until the pH of the washing solution is ≈7. Pour off the supernatant, add 0.1-0.5moL / L hydrochloric acid solution to the above powder, stir or sonicate for 2-3 hours, and wash the acid-treated sample with deionized water several times until the pH of the washing solution is ≈7 , filter, and finally dry the obtained powder at 50-60° C., and the product is titanic acid nanotube powder.

[0039] 2g titanate nanotubes were ultrasonically stirred and dispersed in 80mL deionized aqueous solution to form solution A, 1g hexadecyltrimethylammonium bromide was dissolved in 15mL deionized aqueous solution to form solution B, 0.6mL orthosilicate ethyl Dissol...

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Abstract

The invention discloses a preparation method of a high temperature stable titanium dioxide nanotube powder. According to the preparation method, firstly, a titanic acid nanotube powder is prepared via hydro-thermal synthesis, a silicon dioxide / titanium dioxide composite nanotube powder is obtained via surface modification and high temperature calcinations, and at last, silicon dioxide is removed via etching in a low-concentration sodium hydroxide solution so as to obtain the high temperature stable titanium dioxide nanotube powder. The high temperature stable titanium dioxide nanotube powder is capable of maintaining favorable tubular morphology at a high temperature higher than 400 DEG C, possesses excellent anatase crystal form and excellent catalytic effect, can be widely used in fields such as photocatalysis, lithium battery, solar cell, confinement catalysis, medical science, and catalytic combustion, and is capable of solving problems of the prior art that sintering, breaking, or even collapse of titanium dioxide nanotube are caused by surface or interlayer dehydration via calcination of titanic acid nanotube at a temperature higher than 400 DEG C.

Description

[0001] Technical field: [0002] The invention relates to the technical field of new energy materials and catalytic materials, in particular to a method for preparing high-temperature stable titanium dioxide nanotube powder. [0003] Background technique: [0004] Since Kasuga et al. first prepared titanium dioxide nanotubes in 1998, this one-dimensional tubular nanomaterial with good chemical stability, catalytic activity, moisture sensitivity, gas sensitivity, and photoelectric conversion effect has attracted widespread attention. focus on. At the same time, titanium dioxide nanotubes have special physical and chemical properties, such as large specific surface area, excellent ion exchange performance, special pore volume and pore structure, and have broad application prospects in the fields of photocatalysis, lithium batteries, solar cells, and functional materials. . [0005] There are many preparation methods for titanium dioxide nanotube powder, such as template method,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047C01G23/08B01J21/18
CPCB01J21/185C01G23/047C01G23/08C01P2002/72C01P2004/03C01P2004/04C01P2004/13
Inventor 吴梁鹏李新军杨旭李娟龙丽珍
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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