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Method for preparing homodispersed titanium dioxide photocatalyst on fiberglass surface

A technology of glass fiber and titanium dioxide, which is applied in the field of low-temperature preparation and immobilization of high-activity crystallized titanium dioxide photocatalytic materials, which can solve the problems of small specific surface area, low photocatalytic activity, and reduced specific surface area of ​​photocatalysts.

Inactive Publication Date: 2006-05-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the specific surface area of ​​the photocatalyst will be significantly reduced during the transformation of titanium dioxide from powder to film, resulting in a significant decrease in photocatalytic efficiency.
In order to overcome the shortcomings of powder photocatalysts that are easy to agglomerate and difficult to separate during use, and thin-film photocatalysts have the disadvantages of small specific surface area and low photocatalytic activity, a titanium dioxide particle photocatalyst with low deactivation rate and higher photocatalytic activity was studied. method is inevitable

Method used

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  • Method for preparing homodispersed titanium dioxide photocatalyst on fiberglass surface
  • Method for preparing homodispersed titanium dioxide photocatalyst on fiberglass surface
  • Method for preparing homodispersed titanium dioxide photocatalyst on fiberglass surface

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Low temperature preparation of homogeneously dispersed titanium dioxide particle photocatalysts on the surface of glass fibers.

[0022] The preparation method is as follows: using titanium tetrafluoride as the titanium source and boric acid as the fluorine ion trapping agent, add 0.77g of titanium tetrafluoride and 1.16g of boric acid to 125ml of distilled water to form a precursor solution, and then mix the above two precursors The solid solution was mixed and stirred evenly to obtain a clear treatment solution, wherein the concentration of titanium tetrafluoride was 0.025M, the molar ratio of titanium tetrafluoride to boric acid was 1:3, and the initial pH value of the treatment solution was 2.0. Immerse the glass fiber in the above treatment solution, seal it with plastic wrap, put the treatment solution in an oven at 60°C, keep it warm for 12 hours, take out the glass fiber sample, rinse it with distilled water and dry it at 60°C for 2 hour, the titanium dioxide pa...

Embodiment 2

[0027] In order to examine the effect of the type of fluorotitanate on the crystallization, morphology and photocatalytic activity of titanium dioxide particles immobilized on the surface of glass fibers, in addition to titanium tetrafluoride, ammonium fluorotitanate, potassium fluorotitanate and fluorine sodium titanate. Other reaction conditions such as: the molar concentration of fluorotitanate, the pH value of the treatment solution, the molar concentration of boric acid, the treatment temperature, treatment time, heat treatment temperature and heat treatment time are all the same as in Example 1. The results showed that the titanium dioxide particles prepared by ammonium fluorotitanate, potassium fluorotitanate and sodium fluorotitanate were evenly distributed on the surface of glass fiber, and the photocatalytic degradation rates of nitric oxide were 53.8%, 52.2% and 51.5%, respectively. It can be seen that the photocatalytic activity of the titanium dioxide particles im...

Embodiment 3

[0029] In order to examine the effect of the concentration of titanium tetrafluoride on the crystallization, morphology and photocatalytic activity of titanium dioxide particles immobilized on the surface of glass fibers, except for the different concentrations of titanium tetrafluoride, other reaction conditions such as: the pH value of the treatment solution, The molar concentration of boric acid, treatment temperature, treatment time, heat treatment temperature and heat treatment time etc. are all identical with embodiment 1. The results show that when the concentration of titanium tetrafluoride is 0.5M, many titanium dioxide particles in the solution are directly deposited on the bottom of the container instead of on the surface of the glass fiber, resulting in a waste of raw materials. The photocatalytic degradation rate of nitrogen oxide was 60.2%. When the concentration of titanium tetrafluoride was 0.005M, the number of titanium dioxide particles deposited on the surfac...

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Abstract

The invention provides a method for low-temperature prepare uniformly diffused titanium oxide photo-catalyst on the surface of fiberglass. The invention dissolves the fluoride of titanium or / and fluorine titanate into pure water; adds the boric acid as fluorine ion catching agent to compound the treatment solution whose pH valve is 1-7; immersing the fiberglass base material into said treatment solution to be sealed and laid into the oven for heat preservation process for 5-30 hours in 30-90 Deg. C; takes out the fiberglass base material to be washed with distilled water or de-ionized water, dried in the temperature under 100 Deg. C, and heated in 60-500 Deg. C for 1-10 hours to attain the titanium oxide photo-catalysis loaded on the surface of fiberglass. The invention can overcome the defects of powder photo-catalyst which is easily reunited and hard to separated, and the defects of film photo-catalysis which has small specific surface area and lower photo-catalysis activity, while the invention has lower deactivation speed and higher photo-catalysis activity than film photo-catalyst.

Description

technical field [0001] The invention relates to a low-temperature preparation and immobilization method of a highly active crystallized titanium dioxide photocatalytic material. Background technique [0002] In recent years, in order to solve the increasingly serious problem of environmental pollution, the research and development of highly active heterogeneous photocatalytic materials has attracted extensive attention from governments and researchers all over the world, because this kind of photocatalytic materials can be widely used in air purification, water purification, etc. sterilization, degradation and removal of toxic and harmful pollutants in water, etc. Among all kinds of oxide semiconductor photocatalytic materials, practice has proved that titanium dioxide is most suitable for a wide range of environmental applications, because titanium dioxide has biological and chemical inertness, very strong oxidation ability, strong resistance to light and chemical corrosion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/02B01J21/06B01J32/00
Inventor 余家国余火根程蓓
Owner WUHAN UNIV OF TECH