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Preparation method of titanium dioxide fibers with photocatalysis function and polycrystalline nanostructure

A technology of titanium dioxide and polycrystalline structure, which is applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of many types of organic raw materials, difficulties in industrial scale-up, and complex glue-making processes, etc., to achieve improved photocatalysis Excellent performance, good spinnability, rich pore structure

Inactive Publication Date: 2013-01-30
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above four patents can produce TiO that meets certain water treatment requirements 2 Fiber, but there are many kinds of organic raw materials used, high cost, high pollution and complex rubber making process, which brings great difficulties to industrial scale-up

Method used

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  • Preparation method of titanium dioxide fibers with photocatalysis function and polycrystalline nanostructure
  • Preparation method of titanium dioxide fibers with photocatalysis function and polycrystalline nanostructure
  • Preparation method of titanium dioxide fibers with photocatalysis function and polycrystalline nanostructure

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preparation example Construction

[0015] Below to the TiO of the present invention 2 The preparation method of fiber is described in detail:

[0016] (1) prepare the filtrate that titanium acetate is dissolved in ethanol

[0017] According to the ratio of titanium tetrachloride: potassium acetate=1mol: 3mol~4mol, measure (weigh) two kinds of raw materials respectively; According to the ratio of titanium tetrachloride: ethanol=1mL: 3mL~4mL, the tetrachloride Titanium is diluted in ethanol (measurement and dilution of titanium tetrachloride must be carried out in a fume hood), and the resulting solution is recorded as liquid A; according to the ratio of potassium acetate: ethanol = 1g: 1mL ~ 2mL, dilute potassium acetate to ethanol , and continue to stir for 0.5h to 1h to fully dissolve potassium acetate, and the resulting solution is recorded as liquid B; at 0°C to 10°C and under stirring conditions, add the above solution B dropwise to solution A (or add A dropwise to In B) carry out mixed reaction to genera...

Embodiment 1

[0028] (1) prepare the filtrate that titanium acetate is dissolved in ethanol

[0029] According to the ratio of titanium tetrachloride:potassium acetate=1mol:4mol, 33mL of titanium tetrachloride and 118g of potassium acetate were weighed. According to the ratio of titanium tetrachloride: ethanol = 1mL: 4mL, titanium tetrachloride was diluted in 132mL ethanol, and the resulting solution was recorded as liquid A; according to the ratio of potassium acetate: ethanol = 1g: 2mL, potassium acetate was diluted in 236mL In ethanol, stir for 0.5 h to fully dissolve potassium acetate, and the resulting solution is designated as liquid B. Under the condition of stirring at 0°C, add liquid B dropwise to liquid A for a mixed reaction to generate titanium acetate and potassium chloride, and continue stirring for 1 hour after the drop to complete the reaction. Then, use the property that potassium chloride is insoluble in ethanol It was removed by filtration to obtain a clear titanium acet...

Embodiment 2

[0037] (1) prepare the filtrate that titanium acetate is dissolved in ethanol

[0038] According to the ratio of titanium tetrachloride:potassium acetate=1mol:3mol, 33mL of titanium tetrachloride and 89g of potassium acetate were weighed. According to the ratio of titanium tetrachloride: ethanol = 1mL: 3mL, titanium tetrachloride was diluted in 99mL ethanol, and the resulting solution was recorded as liquid A; according to the ratio of potassium acetate: ethanol = 1g: 1mL, potassium acetate was diluted in 89mL In ethanol, stir for 1 h to fully dissolve potassium acetate, and the resulting solution is designated as liquid B. Then, under stirring condition at 10°C, liquid B was added dropwise to liquid A for a mixed reaction to generate titanium acetate and potassium chloride. After the dropping was completed, stirring was continued for 0.5 h to complete the reaction. Then, potassium chloride was insoluble in ethanol It is removed by filtration to obtain a clear titanium acetat...

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Abstract

The invention discloses a preparation method of titanium dioxide fibers with a photocatalysis function and a polycrystalline nanostructure. The preparation method comprises the following steps: respectively diluting titanium tetrachloride and potassium acetate, which are taken as raw materials, in ethanol, mixing at 0-10 DEG C under the condition of stirring to generate titanium acetate and potassium chloride, filtering to remove potassium chloride by taking advantage of the property that potassium chloride is insoluble to ethanol so as to acquire filtrate of ethanol in which titanium acetateis dissolved, concentrating the filtrate to obtain a titanium acetate sol spinning solution, centrifuging and spinning to obtain precursor fibers, and performing steam activation thermal treatment toobtain the titanium dioxide fibers. The preparation method disclosed by the invention has the advantages of lower raw material cost, simpler sol production process and pollution-free preparation process.

Description

technical field [0001] The invention belongs to the technical field of functional materials, in particular to a titanium dioxide (TiO 2 ) method of preparing fibers. Background technique [0002] TiO was discovered by Fujishima and Honda in 1972 2 Since the photocatalytic effect, semiconductor photocatalysis technology has become a hot spot for researchers from all over the world. So far, the semiconductor photocatalysts that have been studied include TiO 2 , CdS, WO 3 , Fe 2 o 3 , ZnO, ZnS, SnO 2 etc., where TiO 2 The chemical properties are relatively stable, low cost, non-toxic, no secondary pollution, high catalytic activity, strong oxidation ability, and it is regarded as the most promising photocatalytic material in the field of water treatment. [0003] But currently TiO 2 Both of the two systems applied in the field of photocatalytic water treatment have certain defects and drawbacks. One is nano TiO 2 Suspended phase system, this method is easy to agglome...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/10D01D1/02D01D5/18B01J21/06B01J35/06C02F1/30C01G23/053B82Y40/00
Inventor 刘和义裴石光陈炎刘金强沈蕾刘贵双
Owner NANJING UNIV OF SCI & TECH
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