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Active carbon fiber containing nano titanium dioxide particles and its preparation method and uses

A nano-titanium dioxide, activated carbon fiber technology, applied in chemical instruments and methods, chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of secondary pollution, difficult recycling, easy coagulation, etc. Solve the effect of easy agglomeration

Inactive Publication Date: 2005-11-30
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, suspended TiO 2 There are disadvantages such as easy condensation and difficult recycling, which brings certain difficulties to practical application, and there is a problem of secondary pollution

Method used

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  • Active carbon fiber containing nano titanium dioxide particles and its preparation method and uses
  • Active carbon fiber containing nano titanium dioxide particles and its preparation method and uses
  • Active carbon fiber containing nano titanium dioxide particles and its preparation method and uses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix butyl titanate and n-propanol in a mass ratio of 1:3, and after fully mixing, add 0.5 parts by mass of sisal-based activated carbon fiber, soak for 0.5 hours, add 10 parts by mass of water, and dissolve the solvent after complete hydrolysis and water are removed by evaporation, the fibers are taken out, dried at 90° C., and then sintered at 500° C. to obtain activated carbon fibers loaded with titanium dioxide, wherein nanometer titanium dioxide particles account for 5% of the total mass. The product is analyzed by the scanning electron microscope, and the carbon layer on the surface is inlaid with uniform spherical particles, and the particle size is about 10nm. The particles were analyzed by X-ray diffraction and proved to be anatase titanium dioxide crystals.

Embodiment 2

[0022] Mix butyl titanate with n-propanol and viscose-based activated carbon fiber in a mass ratio of 1:6:0.1. After mixing thoroughly, add 10 parts of water to hydrolyze butyl titanate, and then evaporate the solvent and water under low pressure. Remove, take out the fibers, dry at 90°C, and then sinter at 850°C to obtain activated carbon fibers loaded with titanium dioxide, in which nanometer titanium dioxide particles account for 25% of the total mass. The product is analyzed by a scanning electron microscope, and its surface carbon layer is inlaid with dense particles, and the particle size is about 200nm. The particles were analyzed by X-ray diffraction and proved to be anatase titanium dioxide crystals.

Embodiment 3

[0024] Mix butyl titanate with n-propanol and pitch-based activated carbon fibers at a mass ratio of 1:7:0.1, and mix them evenly by ultrasonic oscillation, then add 2 parts of water to hydrolyze butyl titanate, and dry the fibers at 100°C, then After sintering at 500 DEG C, activated carbon fibers loaded with titanium dioxide are obtained, wherein nanometer titanium dioxide particles account for 20% of the total mass. The product is analyzed by a scanning electron microscope, and its surface carbon layer is inlaid with dense particles, and the particle size is about 10nm. The particles were analyzed by X-ray diffraction and proved to be anatase titanium dioxide crystals. Activated carbon fibers without titanium dioxide and TiO 2 The comparison of the pore structure of the loaded activated carbon fibers shows that the specific surface area, total pore volume, and average diameter of micropores of the activated carbon fibers after loading are slightly smaller than those before...

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Abstract

This invention relates to a method for preparing an activated carbon fiber of Titania particle having nanometer and its usage. The fiber is formed from the activated carbon fiber material loaded with the Titania particles, wherein the mass ratio of the Titania particles is 5~25%. The preparing method uses the sol-gel processing: a) hydrolyzing organic titanium compounds of the TiO2 to the TiO2 collosol, and depositing on the activated carbon fiber, b) drying the colloslo and getting the jel, c) annealing, and transforming to nanometer TiO2 particles compounded in the surface of the fiber, then getting the fiber. The fiber not only maintains the poriness but also enhances the optical catalytic activity of the Titania particle, and can be used for removing the volatile organic contaminant with low concentration, wherein its absorbance can reach to 500mg / g and its optical catalytic dissolution rate can reach to 36%.

Description

technical field [0001] The invention relates to an activated carbon fiber containing nano titanium dioxide particles and a preparation method thereof, and the use of the activated carbon fiber containing nano titanium dioxide particles for purifying volatile organic pollutants. Background technique [0002] Activated carbon fiber has abundant micropores and high specific surface area, and its adsorption capacity is much higher than that of other porous adsorption materials such as adsorption resin, zeolite, silica gel, etc.; it is also much better than its similar product activated carbon. The adsorption capacity of activated carbon fiber to organic vapor is several times or even dozens of times larger than that of granular activated carbon; and due to the strong interaction between activated carbon fiber and adsorbate, its micropores directly contact with adsorbate, reducing the distance of diffusion. The adsorption of activated carbon fiber and gas reaches equilibrium in t...

Claims

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Application Information

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IPC IPC(8): D01F9/12
Inventor 陈水挟刘洁予陈林铭
Owner SUN YAT SEN UNIV
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