阅读说明：本技术 光催化剂复合材料、光催化剂复合材料的制造方法及光催化剂装置 (Photocatalyst composite material, method for producing photocatalyst composite material, and photocatalyst device ) 是由 信田直美 内藤胜之 横田昌广 千草尚 太田英男 于 2019-09-12 设计创作，主要内容包括：本发明提供高活性且能够简便地制作且不易剥离的光催化剂复合材料、其制作方法及光催化剂装置。一种光催化剂复合材料,其包含基材和由光催化剂粒子形成的光催化剂层,与基材表面相接的光催化剂层的平均粒径小于光催化剂层表面的平均粒径。(The invention provides a photocatalyst composite material which has high activity, can be simply manufactured and is not easy to strip, a manufacturing method thereof and a photocatalyst device. A photocatalyst composite material comprising a base material and a photocatalyst layer formed of photocatalyst particles, wherein the average particle diameter of the photocatalyst layer in contact with the surface of the base material is smaller than the average particle diameter of the surface of the photocatalyst layer.)

1. A photocatalyst composite material comprising a base material and a photocatalyst layer containing photocatalyst particles, wherein the substrate-side interface of the photocatalyst layer is S_bSetting the opposite side interface as S_tWhen is, the S_bThe average particle diameter r of the photocatalyst particles in the vicinity_bLess than S_tThe average particle diameter r of the photocatalyst particles in the vicinity_t。

2. The photocatalyst composite according to claim 1, wherein a particle size distribution curve of all photocatalyst particles contained in the photocatalyst layer has two or more peaks.

3. The photocatalyst composite of claim 1 or 2, wherein r is_bIs 2 to 50nm, r_tIs 40 to 500 nm.

4. The photocatalyst composite of any one of claims 1 to 3, wherein the photocatalyst particles comprise a metal oxide selected from the group consisting of tungsten oxide, titanium oxide, zinc oxide, niobium oxide, and tin oxide.

5. The photocatalyst composite of any one of claims 1 to 4, wherein the photocatalyst layer further comprises 1/100000 to 1/10 times as many silver nanowires based on the total mass of photocatalyst particles.

6. The photocatalyst composite of any one of claims 1 to 5, wherein the photocatalyst layer comprises photocatalyst particles that differ in chemical composition.

7. A method for producing a photocatalyst composite material, comprising the steps of: coating a dispersion liquid containing the 1 st photocatalyst particles on a substrate; and applying a dispersion liquid containing 2 nd photocatalyst particles having an average particle diameter larger than that of the 1 st photocatalyst particles.

8. The method for producing a photocatalyst composite according to claim 7, wherein the total weight of the 1 st photocatalyst particles deposited on the substrate is smaller than the total weight of the 2 nd photocatalyst particles deposited on the substrate.

9. A photocatalyst device is provided with:

the photocatalyst composite material according to any one of claims 1 to 6,

A light irradiation member for imparting photocatalytic activity to the substrate, and

a supply member that supplies a substance to be treated to the photocatalyst composite,

the photocatalyst composite that is catalytically active by the light facilitates a chemical reaction for treating the substance.

10. The photocatalyst apparatus of claim 9, wherein the photocatalyst layer further comprises an adsorbing material that adsorbs the substance.

Technical Field

Embodiments of the present invention relate to a photocatalyst composite material, a method for producing a photocatalyst composite material, and a photocatalyst apparatus.

Background

It is known that a photocatalyst generates excited holes by light and promotes a strong oxidation reaction. As a photocatalyst having such an action, various photocatalysts are known, and the accelerating action is utilized for decomposition and removal of harmful organic molecules, sterilization, maintenance of hydrophilicity of a base material, and the like.

When the photocatalyst is to be applied to such an application, for example, a photocatalyst composite material in which the photocatalyst is supported on a base material may be brought into contact with a substance to be treated. In order to effectively perform the treatment by this method, the amount of the photocatalyst supported on the substrate is generally increased. However, the increase in the amount of the photocatalyst is directly related to the increase in cost, and there is a problem that the photocatalyst is easily peeled off from the substrate. In addition, in order to increase the surface area, a shape such as a fractal structure may be adopted, but the production method is easy to become complicated, and there is room for study.

Disclosure of Invention

Problems to be solved by the invention

Drawings

Fig. 1 is a schematic view of a photocatalyst composite according to an embodiment.

Fig. 2 is a schematic diagram of a method for producing a photocatalyst composite according to an embodiment.

Fig. 3 is a schematic view of a photocatalyst apparatus according to an embodiment.

Description of the symbols

10 … photocatalyst composite material, 11 … base material, 12 … photocatalyst layer, 21 … 1 st photocatalyst particle, 22 … nd 2 nd photocatalyst particle, 30 … photocatalyst device, 31 … photocatalyst composite material, 32 … light irradiation member, member for supplying substance receiving photocatalytic action to base material by 33 …, 34 … reaction chamber

In view of the above problems, it is desirable to provide a photocatalyst composite material having high activity and being less likely to be peeled off, a method for easily producing the photocatalyst composite material, and a photocatalyst apparatus provided with the photocatalyst composite material.

Means for solving the problems

The photocatalyst composite material according to the embodiment includes a base material and a photocatalyst layer containing photocatalyst particles, and the substrate-side interface of the photocatalyst layer is S_bSetting the opposite side interface as S_tWhen it is, S is as above_bThe average particle diameter r of the photocatalyst particles in the vicinity_bLess than S_tThe average particle diameter r of the photocatalyst particles in the vicinity_t。

In addition, the method for producing a photocatalyst composite material according to the embodiment includes the steps of: coating a dispersion liquid containing the 1 st photocatalyst particles on a substrate; and applying a dispersion liquid containing 2 nd photocatalyst particles having an average particle diameter larger than that of the 1 st photocatalyst particles.

In addition, the photocatalyst apparatus according to the embodiment includes:

the photocatalyst composite material,

A light irradiation member for generating photocatalytic activity on the substrate, and

a supply member for supplying a substance to be treated to the photocatalyst composite material,

the photocatalyst composite material having catalytic activity by the light promotes chemical reactions for treating the substance.