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Photocatalyst self-cleaning finishing agent and preparation and application method thereof

A self-cleaning, photocatalyst technology, applied in the field of self-cleaning, can solve the problems of poor decontamination effect and unstable dispersion, and achieve effective self-cleaning treatment and good dispersion

Active Publication Date: 2011-05-25
THE HONG KONG RES INST OF TEXTILES & APPAREL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a kind of silicon-containing finishing agent that will be doped with metals, aiming at the above-mentioned defect that the dispersibility of the existing self-cleaning finishing agent is not stable enough due to the hydrophobic characteristics of titanium dioxide, resulting in poor decontamination effect. Photocatalyst self-cleaning finishing agent of nanocomposite with titanium and its preparation and application method

Method used

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preparation example Construction

[0049] The present invention also provides a kind of preparation method of photocatalyst self-cleaning finishing agent, comprises the following steps:

[0050] In step S1, a pre-solution is prepared using titanium alkoxide, silicon alkoxide, metal salt;

[0051] In step S2, the photocatalyst self-cleaning finishing agent is obtained by irradiating the pre-solution under ultraviolet rays.

[0052] It is worth mentioning that there are two methods for preparing the titanium alkoxide, silicon alkoxide, and metal salt into a pre-solution in step S1 of the present invention. In one embodiment, the step S1 includes:

[0053] In step S11A, the titanium alkoxide is dissolved in an organic solvent, and stirred at room temperature when the pH value is 1-2 to obtain a TiO-containing 2 The solution;

[0054] In step S12A, the predetermined content of metal salt and silicon alkoxide solution is slowly dropped into the TiO-containing 2 The pre-solution was obtained in the solution.

[...

Embodiment 1

[0070] The preparation method of the photocatalyst self-cleaning finishing agent containing the nano microspheres of Au / Ti / Si comprises the following steps:

[0071] 1) Dissolve titanium tetraisopropoxide (Aldrich, 97%) in ethanol (Riedel, 99.8%), adjust the pH value to 1 with acid, and stir at room temperature for 10 minutes to obtain 1wt% TiO-containing 2 The solution.

[0072] 2) Add 0.1ml AuCl 3 ·HCl·4H 2 O solution (2.32×10 -6 mol L -1 International Laboratories, the U.S.), and 2ml tetraethyl ortho silicate solution (TEOS, International Laboratories, the U.S.), at 55 ℃ and under vigorous stirring, drip into 200ml of the TiO-containing 2 The pre-solution was obtained in the solution. Among them, the molar ratio of Au / Ti / Si is 2.32×10 -5 : 1.47 : 2.5×10 3 .

[0073] 3) Put the beaker containing the prepared pre-solution into a self-made room with an ultraviolet light source for UV irradiation at normal temperature (UV intensity at 1.0mW / crm 2 About) 10 minutes to g...

Embodiment 2

[0076] The photocatalyst self-cleaning finishing agent that prepares the nano microsphere containing Ag / Ti / Si comprises the following steps:

[0077] 1) Dissolve titanium tetraisopropoxide (Aldrich, 97%) in ethanol (Riedel, 99.8%), adjust the pH value to 2 with acid, and stir at room temperature for 20 minutes to obtain 1wt% TiO-containing 2 The solution.

[0078] 2) Add 0.2ml AgNO 3 Solution (5×10 -6 mol L -1), and 2ml of tetraethyl-ortho-silicate solution (TEOS, International Laboratories, USA), at 65°C and under strong stirring, drop into 200ml of the TiO-containing 2 The pre-solution was obtained in the solution. Among them, the molar ratio of Ag / Ti / Si is 1×10 -4 : 1.47 : 2.5×10 3 .

[0079] 3) Put the beaker containing the prepared pre-solution into a self-made room with an ultraviolet light source for UV irradiation at normal temperature (UV intensity at 1.4mW / cm 2 About) 20 minutes to get the photocatalyst self-cleaning finishing agent containing Ag / Ti / Si nano m...

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Abstract

The invention relates to a photocatalyst self-cleaning finishing agent which comprises the following raw materials in part by mol: (1-10)*103 parts of sol, 1-10 parts of titanium alkoxide, (1-10)*10 parts of silicon alkoxide and 1-10 parts of metal salt. The photocatalyst self-cleaning finishing agent contains nano microspheres of metal, titanium and silicon. The invention also provides a preparation and application method of the photocatalyst self-cleaning finishing agent, a photocatalyst self-cleaning article formed by being processed by the photocatalyst self-cleaning finishing agent, and a processing method of the photocatalyst self-cleaning article. The photocatalyst self-cleaning finishing agent prepared in the invention has good dispersability, wherein a metal-doped silicon- and titanium-containing nano micro particle has better hydrophilcity and diameter of less than 30nm. The article processed by using the photocatalyst self-cleaning finishing agent can be used for effectively self-cleaning the dirt through the photocatalyst action of the metal-doped silicon- and titanium-containing nano micro particle under the environment conditions of visible light, air, moisture and the like.

Description

technical field [0001] The invention relates to the field of self-cleaning, more specifically, to a photocatalyst self-cleaning finishing agent and its preparation and application method. Background technique [0002] With the improvement of people's awareness of environmental protection and energy conservation and the improvement of people's living standards, new requirements have been put forward for the performance of materials, so fabrics with three anti-functions (that is, waterproof, oil-proof and dust-proof) have been developed. Research on material self-cleaning technology in China. Most of the existing patent documents related to self-cleaning materials point out that titanium dioxide needs to be used in self-cleaning materials. [0003] In 1972, Fujishima and Honda discovered TiO under light-promoted conditions 2 The self-cleaning properties of titania have been extensively studied for water splitting on electrodes. Self-cleaning clothing may be getting closer n...

Claims

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Application Information

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IPC IPC(8): D06M11/46D06M11/00D06M13/507D21H19/12D21H21/36C09D1/00C09D5/14C09D5/00C03C17/00C04B41/50C04B41/85
Inventor 忻浩忠汪荣华
Owner THE HONG KONG RES INST OF TEXTILES & APPAREL
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