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Photocatalyst composite and photocatalytic functional product using the same

A photocatalyst and composite material technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of adhesion (insufficient adhesion, etc., Achieve the effect of reducing brittleness and easy falling off, excellent photocatalytic activity

Inactive Publication Date: 2011-04-20
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, such an adhesive layer is insufficient in the adhesive force (adhesiveness) between the photocatalyst layer and the adhesive layer, or between the adhesive layer and the resin base material, requiring that the photocatalyst layer not Shedding photocatalyst composites

Method used

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  • Photocatalyst composite and photocatalytic functional product using the same
  • Photocatalyst composite and photocatalytic functional product using the same
  • Photocatalyst composite and photocatalytic functional product using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0169] (Photocatalyst dispersion)

[0170] 1 kg of tungsten oxide particles (manufactured by NIPPON INORGANIC COLOUR & CHEMICAL CO., LTD.) was added to 4 kg of ion-exchange water as a dispersion medium, followed by mixing to obtain a mixture. The obtained mixture was subjected to dispersion treatment using a wet medium stirring mill ("Ultra Apex Mill UAM-1" manufactured by Kotobuki Engineering & Manufacturing Co., Ltd.) under the following conditions to obtain a tungsten oxide particle dispersion.

[0171] Grinding media: 1.85 kg of zirconia beads with a diameter of 0.05 mm

[0172] Stirring speed: the circumferential speed is 12.6 m / s

[0173] Flow rate: 0.25L / min

[0174] Processing time: about 50 minutes

[0175] The average particle size of the tungsten oxide particles in the obtained tungsten oxide particle dispersion was 118 nm. A part of the dispersion was vacuum dried to obtain a solid part. As a result, the BET specific surface area of ​​the obtained solid portion was 40 m 2 ...

Embodiment 2

[0194] In the same manner as in Example 1, except that the temperature of the initial compression when the inorganic particle composite material 1 in Example 1 was manufactured was controlled to 150° C., an inorganic particle composite material was obtained. The SEM micrograph of the inorganic particle composite is shown in Figure 4 in. The surface of the inorganic particle composite material is mainly composed of only the inorganic particle layer, but polypropylene is observed in a part. The pencil hardness of the surface of the inorganic particle composite material is shown in Table 1.

[0195] Next, in the same manner as in Example 1, a photocatalyst composite material was obtained. The adhesiveness of the photocatalyst layer of the photocatalyst composite material is shown in Table 1.

Embodiment 3

[0211] (Photocatalyst coating solution 2)

[0212] To a solution prepared by mixing 26 g of high-purity ethyl orthosilicate (manufactured by TAMA CHEMICALS CO., LTD.) and 120 g of ethanol was added 193 g of water, followed by mixing under stirring. In addition, 61 g of colloidal silica (manufactured by Nissan Chemical Industries, Ltd., STOS: 20.4% by weight) was added, followed by stirring to obtain a binder for the photocatalyst layer.

[0213] To 80 g of the obtained binder for the photocatalyst layer was added 320 g of the photocatalyst dispersion obtained in Example 1 to obtain a photocatalyst coating solution 2.

[0214] (Manufacture of inorganic particle structure 2)

[0215] A film made of polyethylene terephthalate (melting point: 260°C, thickness: 100 microns) was used as a solid material, and a micro-gravure roll (manufactured by Yasui Seiki Co., 230 mesh) was used as the solid material. The same coating solution used to form the inorganic particle layer was applied on the ...

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Abstract

The present invention provides a photocatalyst composite in which brittleness and ease of coming-off of a photocatalyst layer are reduced. The photocatalyst composite includes a base material, at least the surface of which is formed of a plastic-deformable solid material; an inorganic particle layer containing inorganic particles disposed on the surface of the base material; and a photocatalyst layer containing a photocatalyst disposed on the surface of the inorganic particle layer; wherein at least one portion of voids in the inorganic particle layer is filled with the solid material, and the surface of the inorganic particle layer is coated with the solid material except for at least one portion.

Description

[0001] This application claims priority based on Japanese Patent Application 2009-214943 and Japanese Patent Application 2010-075937. The disclosures of Japanese Patent Application 2009-214943 and Japanese Patent Application 2010-075937 are incorporated herein by reference. Technical field [0002] The invention relates to a photocatalyst composite material and a photocatalytic functional product using the composite material. Background technique [0003] When the semiconductor is irradiated with light with energy higher than the band gap of the semiconductor, electrons in the valence band are excited to the conduction band, and holes are formed in the valence band. Since the holes thus formed have strong oxidizing power and the excited electrons have strong reducing power, an oxidation-reduction reaction occurs on the substance in contact with the semiconductor. This redox reaction is called a photocatalytic reaction, and a semiconductor capable of exhibiting this photocatalytic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/34B01J21/08B01D53/86B01D53/72A61L9/013A01N59/16A01P1/00A61L101/46A61L101/02
CPCB01J23/30B01J21/063B01J37/0045B01J23/42B01J21/066B01J35/0013B01J37/0219B01J37/0036B01J35/004B01J37/345B01J35/1014B01J37/0215A61L9/205B01D53/86B01J21/06C03C17/256C09C1/3661
Inventor 酒谷能彰曾我部康平原万纪子高见仁
Owner SUMITOMO CHEM CO LTD