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A method for preparing titanium dioxide nanostructure ultrafine powder

A nanostructure, titanium dioxide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of high cost, long time period, poor uniformity, etc. good uniformity

Inactive Publication Date: 2017-09-29
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for overcoming the high cost of the prior art, long time period, and poor uniformity, and to propose a method for preparing titanium dioxide nanostructure ultrafine powder

Method used

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  • A method for preparing titanium dioxide nanostructure ultrafine powder
  • A method for preparing titanium dioxide nanostructure ultrafine powder
  • A method for preparing titanium dioxide nanostructure ultrafine powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Take a certain amount of ultrapure water at normal temperature and pressure and add it to a polytetrafluoroethylene liner with a total volume of 52ml, then add a certain amount of titanium powder, hydrogen peroxide and hydrofluoric acid respectively to obtain a hydrothermally synthesized mixture. Material, the molar ratio of the batching consumption of titanium powder and ultrapure water is 1:7500, the molar concentration of hydrogen peroxide is 1.53mol / L, and the molar ratio of hydrofluoric acid and hydrogen peroxide is 1:14.36;

[0028] 2) Seal the mixture obtained in step 1) in a stainless steel reaction kettle, then place the sealed stainless steel reaction kettle in a digital blast oven, react at 180°C for 6.5h, and then naturally cool to room temperature to obtain a milky white product The suspension was collected, and dried in a drying oven at 80°C for 1 hour to obtain a titanium dioxide polyhedral active precursor;

[0029] 3) Add a certain amount of ultrapur...

Embodiment 2

[0038] 1) Take a certain amount of ultrapure water at normal temperature and pressure and add it to a polytetrafluoroethylene liner with a total volume of 52ml, then add a certain amount of titanium powder, hydrogen peroxide and hydrofluoric acid respectively to obtain a hydrothermally synthesized mixture. Material, the molar ratio of the batching consumption of titanium powder and ultrapure water is 1:7500, the molar concentration of hydrogen peroxide is 1.55mol / L, and the molar ratio of hydrofluoric acid and hydrogen peroxide is 1:14.36;

[0039] 2) Seal the mixture obtained in step 1) in a stainless steel reaction kettle, then place the sealed stainless steel reaction kettle in a digital blast oven, react at 180°C for 6.5h, and then naturally cool to room temperature to obtain a milky white product The suspension was collected, and dried in a 60°C drying oven for 1 hour to obtain a titanium dioxide polyhedral active precursor;

[0040] 3) Add a certain amount of ultrapure w...

Embodiment 3

[0043] 1) Take a certain amount of ultrapure water at normal temperature and pressure and add it to a polytetrafluoroethylene liner with a total volume of 52ml, then add a certain amount of titanium powder, hydrogen peroxide and hydrofluoric acid respectively to obtain a hydrothermally synthesized mixture. Material, the molar ratio of the batching consumption of titanium powder and ultrapure water is 1:7500, the molar concentration of hydrogen peroxide is 1.53mol / L, and the molar ratio of hydrofluoric acid and hydrogen peroxide is 1:14.36;

[0044] 2) Seal the mixture obtained in step 1) in a stainless steel reaction kettle, then place the sealed stainless steel reaction kettle in a digital blast oven, react at 170° C. for 7 hours, and then naturally cool to room temperature to obtain a milky white product. Suspension, collect the product, and dry in an 80°C drying oven for 1 hour to obtain a titanium dioxide polyhedral active precursor;

[0045] 3) Add a certain amount of ult...

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Abstract

A method for titania nanostructures ultrafine powders prepared, the following steps: 1), arranged at ambient temperature and pressure in the synthesis reactor mixing a polytetrafluoroethylene liner, the size of the seal obtained by the hydrothermal reaction step was 300 nanometers polyhedral crystal anatase TiO2 powder around activity, cooled to room temperature, activity was collected polyhedral powder; 2), arranged at ambient temperature and pressure in the mixing process in autoclave liner polytetrafluoroethylene, sealed by hydrofluoric acid and hydrogen peroxide compound on TiO2 powder hydrothermal activity polyhedron micro nanofabrication, the annular hollow obtain anatase type titania nanostructures active ultrafine powder exposed high energy surface.In the hydrothermal reaction system, acts as hydrofluoric acid chemical etching titanium powder and titanium dioxide powder of polyhedral particles of high energy surface; hydrogen peroxide powder from Regulation polyhedral surface transport in different Ti atoms between the solid and liquid.Adjusting the hydrofluoric acid and aqueous hydrogen peroxide complex can control the amount of cyclic hollow micro nanofabrication producing titania nanostructures.

Description

technical field [0001] The invention relates to a method for preparing titanium dioxide powder. Background technique [0002] Since the beginning of the 20th century titanium dioxide (TiO 2 ) powder commercial production, TiO 2 It has been widely used in our daily life, such as dyes, sunscreens, pigments, toothpaste, etc. Since the 1970s, TiO 2 As a photocatalyst, it has been rapidly developed in the fields of energy and environment. TiO 2 The photocatalytic performance mainly depends on its crystal phase, crystallinity, specific surface area, structural morphology and exposed high-energy crystal planes. Since the 1990s, nanostructured TiO 2 Photoanode materials for dye-sensitized solar cells have been developed rapidly. Nanostructured TiO 2 The characteristics of large specific surface area, high surface activity, good thermal conductivity, good light absorption performance and good dispersion determine the nanostructured TiO 2 with many regular TiO 2 Special prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J35/02B01J35/00
Inventor 莫茂松段中夏王高翔李德法
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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