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Apatite-containing film and production process therefor

A photocatalytic activity, apatite technology, used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the difficulty of film formation thickness, insoluble apatite, no photocatalytic activity and transparency Apatite film, etc.

Inactive Publication Date: 2005-06-15
FUJITSU LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, apatite is insoluble and very easy to precipitate, so it is difficult to control the reaction of raw materials and the thickness of the film during wet processing
Therefore, there are no reports on a simple method for preparing apatite films with photocatalytic activity and transparency

Method used

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  • Apatite-containing film and production process therefor
  • Apatite-containing film and production process therefor
  • Apatite-containing film and production process therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0072] Prepare the substrate

[0073] A 7.5 cm long, 5.5 cm wide and 1.1 mm thick glass piece (Corning 137 glass) was immersed in a washing solution diluted 5 times with Pure Soft PS (commercially available from As One Corporation). Following 30 minutes of sonication, the glass slides were rinsed with distilled water and dried. The dried glass sheet was dip-coated with NDH-500A (commercially available from Nippon Soda Co., Ltd.). Dip coating was performed at room temperature in a nitrogen atmosphere, and the coated panels were withdrawn at a rate of 24 cm / min. Immediately after the dip-coating step, each glass sheet was dried at 120 °C for 40 min and then fired at 500 °C for 30 min to form SiO 2 base coat. Repeat one more round of dip coating, drying and firing steps. The resulting loaded SiO 2 A glass slide was used as the substrate.

[0074] Preparation of apatite film

[0075] Calcium nitrate tetrahydrate [Ca(NO 3 ) 2 4H 2 0, 2.125 g], and the resulting mixture wa...

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Abstract

A photocatalytically active apatite-containing thin film is prepared by a method comprising the steps of: preparing a liquid mixture containing a Ca-containing compound and a P-containing compound; reacting the liquid mixture to prepare an apatite precursor composition; applying an apatite precursor composition to a substrate; and drying the applied apatite precursor composition. The method further comprises a heating step after the drying step. The apatite-containing precursor composition is preferably in the form of a sol.

Description

Background of the invention [0001] The invention relates to an apatite-containing thin film with photocatalytic activity, a light-transmitting material containing the thin film, and a preparation method of the thin film. [0002] Recently, intensive research has been done on photocatalysts with the aim of endowing building materials (such as thick glass plates and ceramic tiles), electronic devices (such as personal computers and mobile phones), home appliances (such as refrigerators and air purifiers), interior decoration ( Curtains), household items, medical appliances and other items have antifouling performance, deodorization performance and antibacterial performance. (See K. Hashimoto and A. Fujishima, "Sanka chitan hikari shokubai no subete-kohkin, bouo, kuhki joka no tameni- (All About Titanium Oxide Photocatalysts- For Antibacterial, Antifouling and Air Cleaning Purposes-))", CMC, 1988; and K. Hashimoto, "Saishin hikari shokubai gijutsu to jitsuyoka senruyaku (Latest ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/32C03C17/22C03C17/25
CPCC03C17/22C03C17/25C03C2204/02C03C2217/212C03C2217/228C03C2217/23C03C2217/24C03C2217/28C03C2217/71C03C2218/111C03C2218/113Y10T428/12729C01B25/32
Inventor 渡部俊也吉田直哉若村正人
Owner FUJITSU LTD
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