Preparation method of titanium dioxide sol for catalyzing the dye decolouration

A technology of dye decolorization and dye solution, applied in the field of preparation of TiO2 sol, can solve the problems of endangering human survival and the environment, high chromaticity of dyeing wastewater, difficult degradation, etc., and achieves low equipment cost, high utilization rate of light energy, and high production efficiency. Simple to use effects

Inactive Publication Date: 2009-02-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The dyeing wastewater of the textile printing and dyeing industry has high chroma, complex components, high biological toxicity, mutagenicity and carcinogenicity, thus causing seri

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1 TiO 2 Sol catalytic activity orange K-GN decolorization

[0021] 1. Add 7.2 parts of tetra-n-butyl titanate dropwise to 3.5 parts of ethanol, stir for 2 minutes on a magnetic stirrer (60-500rpm) to mix evenly; add 48.8 parts of water and 40.5 parts of water to the conical flask in order 1mol / L hydrochloric acid, mix uniformly; under these conditions, the mixture of ethanol and tetra-n-butyl titanate is added dropwise to the above mixture at a rate of 1 drop / s. After the dripping is completed, let it stand and age for 7 days at room temperature before use.

[0022] 2. Add 90.9 parts of TiO to 9.1 parts of reactive orange K-GN dye solution with a concentration of 20mg / L 2 Sol, stir well. Then it was irradiated with a 40W ultraviolet lamp (253.7nm) for 100 minutes, and the decolorization rate was 97.5%.

Example Embodiment

[0023] Example 2 H 2 O 2 / TiO 2 Sol-catalyzed direct scarlet 4BS decolorization

[0024] 1. Add 7.0 parts of tetrabutyl titanate dropwise to 3.5 parts of ethylene glycol, stir on a magnetic stirrer (60-500rpm) for 2 minutes to mix evenly; add 40.1 parts of water and 48.4 parts of concentration to the conical flask sequentially It is 1mol / L hydrochloric acid, mixed uniformly; under this condition, the mixture of ethylene glycol and tetrabutyl titanate is added dropwise to the above mixture at a rate of 1 drop / s. After the dripping is completed, let stand at room temperature for 5 days and add 1.0 part of 0.01% H 2 O 2 Mix well and use after aging for 2h.

[0025] 2. Add 83.3 parts of H to 16.7 parts of reactive orange K-GN dye solution with a concentration of 20mg / L 2 O 2 / TiO 2 Sol, mix well. Then, it was irradiated under a 40W ultraviolet lamp (253.7nm) for 80 minutes, and the decolorization rate was 97.0%.

Example Embodiment

[0026] Example 3 Fe 3+ / TiO 2 Sol-catalyzed decolorization of acid lake blue A

[0027] 1. Add 7.0 parts of ethyl titanate dropwise to 3.5 parts of ethanol, stir on a magnetic stirrer (60-500rpm) for 2 minutes to mix evenly; add 40.0 parts of water and 48.2 parts of water to the conical flask with a concentration of 1mol / The hydrochloric acid of L is mixed uniformly; under this condition, the mixture of ethanol and ethyl titanate is added dropwise to the above mixture at a rate of 1 drop / s. After the dripping is completed, add 1.3 parts of 0.01% Fe to it after aging for 4 days at room temperature 3+ Mix well and use after aging for 10 hours.

[0028] 2. Add 80 parts of Fe to 20 parts of acid lake blue A dye solution with a concentration of 20mg / L 3+ / TiO 2 Sol, mix well. Then, it was irradiated with a 40W ultraviolet lamp (253.7nm) for 60 minutes, and the decolorization rate was 97.8%.

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PUM

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Abstract

The invention relates to a preparation method of TiO2 sol with photo-catalyst activity, and the application thereof in dye decoloration, pertaining to the cross field of textile chemical technology and environmental technology. The preparation method of TiO2 sol provided by the invention adopts titanate, an alcoholic solvent, water and a catalyst to prepare the TiO2 sol, and the solution is added with additives, such as H2O2, Fe<3+>, Cu<2+>, Cl<->, Br<-> and the like. The TiO2 sol is taken as a catalyst and can effectively decolor active dye, direct dye, acid dye, cationic dye and the like. under the irradiation of ultraviolet lights with the power of 40W and the wavelength of 253.7m.

Description

technical field [0001] The invention belongs to the intersecting field of textile chemical technology and environmental technology, and specifically relates to a TiO with photocatalytic activity that can be used for dye decolorization 2 Preparation of sols. Background technique [0002] The dyeing wastewater of the textile printing and dyeing industry has high chroma, complex components, high biological toxicity, mutagenicity and carcinogenicity, thus causing serious environmental pollution, endangering human survival and the environment, and due to the stability of synthetic dyes And the diversity of structure makes degradation very difficult. Therefore, the decolorization and degradation of dyes have received more and more attention. [0003] Photocatalytic oxidation treatment of printing and dyeing wastewater is a novel and promising method, which has the advantages of low energy consumption, easy operation, and no secondary pollution. At present, the most concerned ca...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J35/00C02F1/30
Inventor 王潮霞刘海
Owner JIANGNAN UNIV
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