What is the Titanium Dioxide Photocatalyst?

光触媒セラミックフィルター
The Photocatalytic Filter

It is removable pollution from the air by shine and titanic oxide, and that good for the ecology. — What is the Titanium Dioxide Photocatalyst? It is removable harmful substances, malodorous substances and bacterium by shinning a light on photo catalyst. Breakdown of photo catalyst which is resolvable even the microbial carcass will makes air around clean. Also, the photo catalyst is only washed with water to clean up, because it has feature of the self cleaning and high hydrophilicity. SEIWA industry ,Ltd has succeeded in making the filter by photo catalyst. We pursue research and development of photo catalyst to make the air and water quality clean.

Our efforts for Photocatalyst

The titanium dioxide ceramic filter was developed for Seiwa Kogyo Co,.Ltd. through collaborative research between Professor Kazuhito Hashimoto of Tokyo University and Japan Science and Technology Agency(from the Creative Research Initiative of 1999-2000). This original, Japan-made Photocatalyst works by irradiating titanium dioxide with ultraviolet rays. The photocatalyst decomposes noxious gases and harmful substances with an effectiveness beyond that of ozone (O3) technologies. In addition, the reaction takes place only on the surface of the titanium dioxide within the device, and therefore, unlike ozone, is safe and has no effect on the human body.The newly-developed Photocatalytic Ceramic Filter(patents No.4610135) offers high durability and unequaled effectiveness against odors and bacteria. Its’ performance can clearly be seen when compared with other devices currently in use.

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Newly-developed Photocatalytic Ceramic Filter

Photocatalytic Ceramic Filter
Photocatalytic Ceramic Filter
Photomacrograph

“Photocatalytic Ceramic Filter” breaks down harmful substances, bad smell substances and bacterium, but absorbing and removing dirt such as active charcoal which is used for the traditional air cleaner. For this reason, it will be not saturated. It also break down the substances which was in touch to Photocatalytic Ceramic Filter, so it is possible to the strong oxidative breakdown without becoming health hazards such as ozone. In addition, it break down bacterium self, so there is no risk of secondary infection from dead shape of the bacterium and others. For your information, the product wes developed for Seiwa Kogyo Co,.Ltd. through collaborative research between Professor Mr.Fujishima in Tokyo Univercity, Professor Hashimoto and The Japan Science and Technology Agency.

Characteristic of Photocatalytic Ceramic Filter
  1. The filter’s especially porous construction creates a large surface area, making it easy to feely control the amount of titanium dioxide used.
  2. Even if the filter becomes soiled, it can easily be washed with water and reused (however, if the filter becomes completely coated by some substance, it should be returned to the manufacturer for reprocessing).
  3. The filter is non-flammable, and its performance remains unaffected regardless of how close the device rests to a light source or the amount of light it comes into contact with.
  4. With especially high porosity (80-90%), air resistance is extremely low.
  5. Random structures allow more efficient contact with fluids.
Because of these features, the Photocatalytic Ceramic Filter possesses high filtration ability when compared with existing Photocatalytic filters.
Current filters The Photocatalytic FIlter
As contaminated air passes through, very few impurities make contact with the filter’s surface. As a result of the filter’s dense structure, there is greater efficiency of contact with the titanium dioxide.

The Photocatalyst decomposes noxious gases and harmful substances. The reaction takes place only on the surface of the titanium dioxide within the device.
The Photocatalyst decomposes noxious gases and harmful substances. The reaction takes place only on the surface of the titanium dioxide within the device. “titanium oxide”has traditionally been used for such things as a white pigment in cosmetics and textile additives. But on one occasion, it was attracted lots of attention as Photocatalytic from “Honda and Fujishima effects” which was discovered at “Fujishima laboratory” in Tokyo University. The basis of oxidation-reduction from titanium oxide is similar to plant photosynthesis. When the sun’s rays strike chlorophyll, oxygen and starch are produced from water and carbon dioxide. On the other hand, in the Photocatalyst, when titanium dioxide is irradiated with near ultraviolet rays (wavelengths below 380nm), reactive oxygen species (such as hydroxyl radical) are produced from water and oxygen after oxidizing harmful substance, malodorous substance and bacteria.

Sterile filtration and antivirus data by the exam of outside investigative organ(Japanese)>>

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