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Method for filming titanic oxide light-catalysed thin film at low-temperature

A technology of photocatalytic thin film and titanium dioxide, which is applied in chemical instruments and methods, physical/chemical process catalysts, catalyst activation/preparation, etc., can solve the problem of low photocatalytic performance of titanium dioxide thin films, long preparation cycle, hours to days, etc. problems, to achieve the effect of saving preparation time, good uniformity and low preparation temperature

Inactive Publication Date: 2007-11-21
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the modified sol-gel method is a more commonly used method. This method has the advantages of simple equipment, unlimited substrates, and low operating temperature. And the photocatalytic performance of the prepared titanium dioxide film is not high

Method used

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  • Method for filming titanic oxide light-catalysed thin film at low-temperature
  • Method for filming titanic oxide light-catalysed thin film at low-temperature
  • Method for filming titanic oxide light-catalysed thin film at low-temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Anhydrous absolute ethanol (20 mL) and diethanolamine (2 mL) were added to isopropyl titanate (20 mL), then distilled water (1 mL) was added to hydrolyze, and a pale yellow sol was prepared by stirring.

[0021] The prepared sol was rolled on a printing cardboard with a glass rod, left standing for 3 minutes until the surface was dry, and then heated with a microwave with a maximum output of 750W for 5 minutes. The temperature was controlled at 120°C, and the desired titanium dioxide film was obtained after cooling.

Embodiment 2

[0031] Methylene blue (concentration: 0.1 g / L) alcohol solution was dropped on the paper prepared with the titanium dioxide film, and irradiated under a 10W ultraviolet lamp for 30 minutes, and the irradiation distance was about 10 cm. The methylene blue color on the filter paper coated with the titanium dioxide film after being irradiated by the ultraviolet lamp almost disappeared, and the decolorization effect was remarkable (Fig. 1).

[0032] Comparative Example 1

[0033] Methylene blue (concentration: 0.1 g / L) alcohol solution was dropped on the card paper prepared with titanium dioxide film, and irradiated under 10W external lamp for 30 minutes, and the irradiation distance was about 10 cm.

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Abstract

The invention is concerned with a method to get Titanium Oxide film with low temperature. Prepare Titanium Oxide sol in Sol-gel method, select titanium isopropylate as precursor, and spread the sol on substrate. Dry the substrate for some time or use it at first hand, heat to 90 to 200 degree with high frequency electric field microwave to form Titanium Oxide film with photo-catalysis activity. For the low heating temperature, the Titanium Oxide film can be prepared on the stuff without thermal stability, such as paper, cloth and plastic, and the film has stronger redox activity. It saves energy and prepared time to enhance the film quality quickly and efficiently. The film has high photocatalytic activity without cap.

Description

technical field [0001] The invention relates to a low-temperature film-forming method of a titanium dioxide photocatalytic film. Background technique [0002] In the early 1970s, Fujishima and Honda discovered TiO in experiments 2 The single-crystal electrode can generate photo-oxidation and photo-reduction reactions after being irradiated by light, and split water into hydrogen and oxygen, and this research has continued to this day. The practical application of photocatalysts to various fields is in recent years, due to TiO 2 It has the characteristics of high catalytic activity, good chemical stability, low price, safe use and transparent film prepared. As a new generation of environmental purification materials, it has been widely used, especially in environmental pollution control. to develop. [0003] Initially, TiO 2 The research of photocatalytic materials is mostly carried out in the suspension system. When powdered titanium oxide is used for water treatment, si...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J37/34
Inventor 孙冰朱小梅
Owner DALIAN MARITIME UNIVERSITY
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