Method for preparing powder-TiO2 photoinduced super-hydrophilic composite film at low temperature

A composite film and light-induced technology, which is applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve the problems of low cost and difficult application of powder materials, and achieve low cost, good light-induced super The effect of hydrophilicity and good light transmittance

Active Publication Date: 2016-07-20
INST OF EARTH ENVIRONMENT CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a low-temperature preparation powder-TiO 2 The method of light-induced superhydrophilic composite film, under low temperature conditions, the powder material is successfully loaded on the carrier substrate, and a composite film is prepared, which solves the problem of difficult application of powde

Method used

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  • Method for preparing powder-TiO2 photoinduced super-hydrophilic composite film at low temperature
  • Method for preparing powder-TiO2 photoinduced super-hydrophilic composite film at low temperature
  • Method for preparing powder-TiO2 photoinduced super-hydrophilic composite film at low temperature

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Experimental program
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Effect test

Embodiment 1

[0031] see image 3 , low-temperature preparation of powder-TiO 2 The method for light-induced superhydrophilic composite film, comprises the following steps:

[0032] (1) TiO 2 Sol preparation:

[0033]Under ice-water bath conditions, concentrated hydrochloric acid (mass fraction 37%), H 2 O. Mix tetrabutyl titanate (TBT) at a volume ratio of 0.8:100:10, stir for 2 hours, and age at room temperature for 12 days to obtain TiO 2 Sol;

[0034] (2) Preparation of ZnO Microsol:

[0035] Mix powder photocatalytic material ZnO with a particle size of 10nm to 100nm and solvent ethanol at a ratio of 5mg: 1mL, and continuously ultrasonicate for 0.5h at a power of 400W to disperse evenly to obtain a microsol of ZnO;

[0036] (3) ZnO-TiO 2 Preparation of mixed sols:

[0037] TiO 2 The sol and ZnO microsol were mixed at a volume ratio of 5:1, and ultrasonically dispersed for 30 minutes to obtain ZnO-TiO 2 mixed sol;

[0038] (4)ZnO-TiO 2 Low temperature preparation of composit...

Embodiment 2

[0046] (1) TiO 2 Sol preparation:

[0047] Under ice-water bath conditions, concentrated hydrochloric acid (mass fraction 37%), H 2 O. Mix tetrabutyl titanate (TBT) in a volume ratio of 0.8:100:10, stir for 2 hours, and age at room temperature for 15 days to obtain TiO 2 Sol;

[0048] (2)ZnWO 4 Preparation of microsols:

[0049] The powder photocatalytic material ZnWO with a particle size of 200nm to 2μm 4 Mix with solvent ethanol at a ratio of 2mg:5mL, and continuously sonicate for 2 hours at a power of 400W, and disperse evenly to obtain ZnWO 4 microsol;

[0050] (3)ZnWO 4 -TiO 2 Preparation of mixed sols:

[0051] TiO 2 Sol and ZnWO 4 The microsols were mixed at a volume ratio of 1:2 and dispersed ultrasonically for 30 minutes to obtain ZnWO 4 -TiO 2 mixed sol;

[0052] (4)ZnWO 4 -TiO 2 Low temperature preparation of composite films:

[0053] Place the carrier substrate in water containing alkaline cleaning agent, soak for 20 minutes, then rinse it with dei...

Embodiment 3

[0060] (1) TiO 2 Sol preparation:

[0061] Under ice-water bath conditions, concentrated hydrochloric acid (mass fraction 37%), H 2 O. Mix tetrabutyl titanate (TBT) at a volume ratio of 1.1:100:10, stir for 2 hours, and age at room temperature for 18 days to obtain TiO 2 Sol;

[0062] (2)(BiO) 2 CO 3 Preparation of microsols:

[0063] Powder photocatalytic material (BiO) with a particle size of 500nm to 1.5μm 2 CO 3 Mix with the solvent methanol at 1mg: 5mL, and continuously sonicate for 5 hours at a power of 400W, and disperse evenly to obtain (BiO) 2 CO 3 microsol;

[0064] (3)(BiO) 2 CO 3 -TiO 2 Preparation of mixed sols:

[0065] TiO 2 Sol with (BiO) 2 CO 3 The microsol was mixed at a volume ratio of 3:1, and ultrasonically dispersed for 30 minutes to obtain (BiO) 2 CO 3 -TiO 2 mixed sol;

[0066] (4)(BiO) 2 CO 3 -TiO 2 Low temperature preparation of composite films:

[0067] Place the carrier substrate in water containing alkaline cleaning agent, s...

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Abstract

The invention provides a method for preparing a powder-TiO2 photoinduced super-hydrophilic composite film at a low temperature. Under the condition of ice-water bath, hydrochloric acid, H2O and tetrabutyl titanate are mixed in the volume ratio of (0.6-1.3):100:10 and react under stirring for 2h, aging is performed at the room temperature, and TiO2 sol is obtained; a powder photocatalytic material is added into solvent and subjected to ultrasonic dispersion to be uniform, and micro-sol made from the powder material is obtained; the TiO2 sol is mixed with the micro-sol made from powder photocatalytic material, and powder-TiO2 mixed sol is obtained after uniform dispersion; the powder-TiO2 mixed sol is sprayed for coating a carrier substrate at 80 DEG C, film coating is performed with a spraying method, and then drying at the room temperature is performed. The powder-TiO2 composite film prepared with the method is prevented from powder separation after being dried, and has good adhesive force; the film shows a good photoinduced super-hydrophilic property, and the light transmittance is relatively high; the film coating method has the advantages of simple operation, mild technological conditions, and relatively low cost, thereby facilitating industrial production and application.

Description

technical field [0001] The invention belongs to the field of photocatalytic film preparation and application, and relates to a low-temperature preparation of powder-TiO 2 A method for light-induced superhydrophilic composite films. Background technique [0002] Nanophotocatalysis technology is a new type of environmental treatment method. It uses solar energy to excite semiconductor photocatalytic materials to generate active free radicals, which can efficiently degrade and remove toxic and harmful substances in the environment. It has great application potential in air pollution control. Compared with the traditional physical adsorption method (activated carbon), the use of nano-photocatalytic technology to purify air has the following advantages: catalytic degradation reaction can be carried out at normal temperature and pressure; easy to operate; under the excitation of sunlight, it can effectively remove NO in the atmosphere will not cause secondary pollution. [0003]...

Claims

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Application Information

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IPC IPC(8): B01J23/06B01J23/30B01J27/232B01J27/24B01J37/04B01J37/34
CPCB01J23/002B01J23/06B01J23/30B01J27/232B01J27/24B01J35/004B01J37/04B01J37/347
Inventor 黄宇刘燕王震宇曹军骥
Owner INST OF EARTH ENVIRONMENT CHINESE ACAD OF SCI
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