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Method of storing photocatalytic member

A technology of photocatalysis and components, applied in catalyst protection, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as packaging air permeability and humidity without consideration

Inactive Publication Date: 2010-07-14
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Photocatalytic components are usually packaged and stored with light-shielding materials, but the packaging and storage do not take into account the air permeability of the package and the humidity inside the package, etc.

Method used

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  • Method of storing photocatalytic member
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  • Method of storing photocatalytic member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0085] In this Example A, a photocatalytic member containing fluorine-containing anatase-type titanium oxide having 3.76% by weight of fluorine relative to titanium oxide was used as the photocatalytic member. The photocatalytic member was set to a constant temperature tank (DN43, manufactured by YAMATO Science Co., Ltd.) or a constant temperature and humidity tank (PL- 2KP, manufactured by Espec Co., Ltd.), after storage for 72 hours, the fluorine content in the fluorine-containing titanium oxide was measured respectively. The storage conditions (relative humidity, temperature) of Example 1, Example 2, and Comparative Example 1 are shown in Table 1 below. It should be noted that the fluorine content was calculated by dissolving the photocatalytic member (fluorine-containing titanium oxide) with acid, and calculating the Ti content in the solution using high-frequency induction plasma spectroscopy (ICP). 4+ with F - Ratio (F - / Ti 4+ ) to calculate the fluorine content.

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Embodiment B

[0105] In this Example B, the photocatalytic member 3g weighed in a powder state was set at a temperature of 40°C and a humidity of 50°C under the conditions of the following Examples 3-9 and Comparative Examples 2-4. % in a constant temperature and humidity chamber (PL-2KP, manufactured by Espec Co., Ltd.) for 3 months, and the time change of the fluorine content in the fluorine-containing titanium oxide at this time was measured. The storage conditions of Examples 3 to 9 and Comparative Examples 2 to 4 are shown in Table 4 below. In addition, as a photocatalytic member, the photocatalytic member containing the fluorine-containing titanium oxide whose fluorine content is 3.76 weight% was used.

[0106]In Example 3, the photocatalytic member and the hygroscopic material silica gel (250 g, Kanto Chemical Co., Ltd.) were packed together in a closed container (170 × 240 mm) made of polyethylene with a chuck, and the airtight Stored in a constant temperature and humidity chamber ...

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Abstract

A novel method of storing a photocatalytic member containing a fluorine-containing anatase titanium oxide is provided in which the photocatalytic member containing a fluorine-containing anatase titanium oxide can be inhibited from decreasing in fluorine content during storage. The method of storing a photocatalytic member containing a fluorine-containing anatase titanium oxide comprises storing the member in a surrounding environment having a relative humidity of 30% or lower. With the storage method, the fluorine-containing titanium oxide can be inhibited from releasing the fluorine from the surface thereof and the photocatalytic member can be inhibited from decreasing in fluorine content during the storage.

Description

technical field [0001] The present invention relates to a storage method for a photocatalytic member containing fluorine-containing anatase-type titanium oxide. Background technique [0002] In recent years, photocatalytic materials containing titanium oxide have been used in various places for the purpose of sterilization, deodorization, and antifouling. The place where the photocatalytic material is used is not limited to outdoors where it is easy to ensure the amount of light required for the catalytic reaction. Even indoors where it is difficult to ensure the amount of light, the photocatalytic material can be used by installing a light source near the photocatalytic material. [0003] For example, in order to sufficiently carry out the catalytic reaction of the photocatalytic material in an indoor device for sterilization or deodorization, it is only necessary to install a light source (ultraviolet lamp) in the device. However, if the activity of titanium oxide is low,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/02B01J27/135B01J33/00B01J35/00
CPCB01J21/063B01J27/135B01J27/12B01J35/004B01J33/00B01J35/39
Inventor 德弘宪一谷口昇黑羽智宏德满修三辻由浩稻垣纯西口昌志
Owner PANASONIC CORP