JPH11169723A - Photocatalyst element - Google Patents
Photocatalyst elementInfo
- Publication number
- JPH11169723A JPH11169723A JP9347887A JP34788797A JPH11169723A JP H11169723 A JPH11169723 A JP H11169723A JP 9347887 A JP9347887 A JP 9347887A JP 34788797 A JP34788797 A JP 34788797A JP H11169723 A JPH11169723 A JP H11169723A
- Authority
- JP
- Japan
- Prior art keywords
- visible light
- ion exchange
- light catalyst
- catalyst
- exchange resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000011941 photocatalyst Substances 0.000 title abstract description 31
- 239000003054 catalyst Substances 0.000 claims abstract description 58
- 238000005342 ion exchange Methods 0.000 claims abstract description 6
- 230000001699 photocatalysis Effects 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 6
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 abstract description 15
- 239000003456 ion exchange resin Substances 0.000 abstract description 15
- 229920003303 ion-exchange polymer Polymers 0.000 abstract description 15
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 13
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract description 13
- 239000011521 glass Substances 0.000 abstract description 8
- ROFVEXUMMXZLPA-UHFFFAOYSA-N Bipyridyl Chemical compound N1=CC=CC=C1C1=CC=CC=N1 ROFVEXUMMXZLPA-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052707 ruthenium Inorganic materials 0.000 abstract description 6
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000758 substrate Substances 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 125000000524 functional group Chemical group 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 230000001476 alcoholic effect Effects 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000012018 catalyst precursor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000011328 necessary treatment Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000005361 soda-lime glass Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229920000265 Polyparaphenylene Polymers 0.000 description 1
- 101100258086 Postia placenta (strain ATCC 44394 / Madison 698-R) STS-01 gene Proteins 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010574 gas phase reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- -1 polyphenylene Polymers 0.000 description 1
- 150000004032 porphyrins Chemical class 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
Landscapes
- Removal Of Specific Substances (AREA)
- Catalysts (AREA)
- Physical Water Treatments (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば、空気中の
悪臭物質分解などの気相反応や水溶液中の有害・不要物
質分解などに用いることができる光触媒素子に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photocatalytic device which can be used for, for example, gas phase reactions such as decomposition of malodorous substances in air and decomposition of harmful and unnecessary substances in aqueous solutions.
【０００２】[0002]
【従来の技術】光触媒は一般家庭用浄水器や空気清浄器
等に、広く用いられるようになってきた。ここで、紫外
光及び可視光の両方を吸収して反応を進める光触媒素子
が開発されている。一例として現在悪臭除去に用いられ
て光触媒素子の斜視図（モデル図）を図２に示す。図中
上方より光（可視光及び紫外光）が照射され、右方向に
向かって原料（ここでは有害物質を含む液体）が供給さ
れ、光触媒素子に接触し、無害化された反応物となる。
この光触媒素子の触媒層には紫外光触媒と可視光触媒が
混合されて配されている。ところが、このような光触媒
素子は可視光触媒の耐久性が低く、その改善が求められ
ていた。また、このような光触媒素子の働きは光の当た
る表面のみで行われるため、できるだけ大きな面積を有
する素子が望ましいが、これは装置のコンパクト化と相
反するものである。ここでコンパクトな光触媒装置を可
能とする光触媒素子が求められていた。2. Description of the Related Art Photocatalysts have been widely used in general household water purifiers and air purifiers. Here, a photocatalytic device that absorbs both ultraviolet light and visible light to promote the reaction has been developed. As an example, FIG. 2 shows a perspective view (model diagram) of a photocatalytic device that is currently used for odor removal. Light (visible light and ultraviolet light) is irradiated from above in the figure, and a raw material (here, a liquid containing a harmful substance) is supplied rightward, and comes into contact with the photocatalyst element to become a detoxified reactant.
An ultraviolet light catalyst and a visible light catalyst are mixed and arranged in a catalyst layer of the photocatalytic device. However, such a photocatalytic device has low durability of a visible light catalyst, and its improvement has been demanded. Further, since the function of such a photocatalyst element is performed only on the surface to which light is applied, an element having an area as large as possible is desirable, but this is contrary to the downsizing of the apparatus. Here, a photocatalytic element that enables a compact photocatalytic device has been demanded.
【０００３】[0003]
【発明が解決しようとする課題】本発明は従来技術が有
する欠点を解決する、すなわち、長期間の使用でも可視
光触媒の性能が低下せず、また、コンパクトな光触媒装
置を可能とする優れた光触媒素子を提供することを目的
とする。SUMMARY OF THE INVENTION The present invention solves the drawbacks of the prior art, that is, an excellent photocatalyst which does not reduce the performance of a visible light catalyst even when used for a long period of time and enables a compact photocatalyst device. It is intended to provide an element.
【０００４】[0004]
【課題を解決するための手段】本発明者等は、従来の光
触媒素子の劣化のメカニズムについて調査を行ったとこ
ろ次のようなことが判った。すなわち、紫外光触媒は酸
化チタンなどの無機物であるのに対し、可視光触媒はル
テニウムビピリジン三錯体などの有機物が用いられてい
た。ここで紫外線がこれら混合触媒に作用すると、その
可視光触媒の光活性が失われることが判った。ここで本
発明者等は、紫外光触媒による紫外線除去作用に着目し
て、可視光触媒紫外線からの遮断を図り、本発明に至っ
た。すなわち本発明の光触媒素子は請求項１に記載のよ
うに、光透過性物の光入射側に紫外光触媒層を有し、光
透過側に可視光触媒層を有する光触媒素子である。Means for Solving the Problems The present inventors have investigated the mechanism of deterioration of a conventional photocatalytic device and found the following. That is, the ultraviolet light catalyst is an inorganic substance such as titanium oxide, whereas the visible light catalyst is an organic substance such as a ruthenium bipyridine tricomplex. Here, it was found that when ultraviolet rays acted on these mixed catalysts, the photoactivity of the visible light catalyst was lost. Here, the present inventors have focused on the ultraviolet light removing action of the ultraviolet photocatalyst, and tried to cut off the ultraviolet light from the visible light catalyst, thereby achieving the present invention. That is, as described in claim 1, the photocatalytic device of the present invention is a photocatalytic device having an ultraviolet photocatalyst layer on the light incident side of a light transmitting material and a visible light catalyst layer on the light transmitting side.
【０００５】[0005]
【発明の実施の形態】本発明において、紫外光触媒層は
光透過性の光入射側に、可視光触媒層は光透過側にある
ことが必要である。この構成により、光触媒素子に照射
された光の内、紫外線は紫外光触媒層に吸収され目的の
反応に寄与し、この紫外光触媒層及び光透過性物とを透
過した可視光成分が可視光触媒層に達して目的の反応に
寄与する。すなわち、光触媒反応は触媒層表面のみで生
じるが、上記構成によれば、光入射側及び光透過側の２
面で反応が生じるので、従来の光触媒素子と比較した場
合、コンパクトな光触媒装置が可能となる。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, it is necessary that the ultraviolet photocatalyst layer is on the light transmitting side and the visible light catalyst layer is on the light transmitting side. With this configuration, of the light applied to the photocatalytic element, the ultraviolet light is absorbed by the ultraviolet photocatalyst layer and contributes to a desired reaction, and the visible light component transmitted through the ultraviolet photocatalyst layer and the light-transmitting substance is transmitted to the visible light catalyst layer. To reach the desired reaction. That is, the photocatalytic reaction occurs only on the surface of the catalyst layer.
Since a reaction occurs on the surface, a compact photocatalyst device is possible as compared with a conventional photocatalytic device.
【０００６】なお、本発明において光透過性物としては
可視光触媒の触媒活性が最大となる波長の光に対してで
きるだけ吸収性が低いものを選択することが必要であ
る。用いる紫外光触媒としては酸化チタン（Ｔｉ
Ｏ2）、酸化亜鉛（ＺｎＯ）、酸化タングステン（Ｗ
Ｏ3）あるいはチタン酸ストロンチウム（ＳｒＴｉＯ3）
などが使用可能である。このうち、紫外光触媒としては
酸化チタンであることが望ましい。酸化チタン、特にア
ナターゼ型酸化チタンは光活性が極めて高く、通常の蛍
光灯から放射される微量の紫外線でも有効に作用する。
さらに酸化チタンは波長が３８０ｎｍ未満の紫外線に対
する吸収が著しく大きい上、４００ｎｍ以上の波長の光
を全く吸収しない。このため可視光の透過が良好であり
ながら、紫外線の可視光触媒層への到達を完全に防ぐの
で可視光触媒の劣化を防止できる。なお、光透過物とし
てソーダ石灰ガラスを選択した場合、その表面に酸化チ
タンの薄膜を高温にて形成する際に電子−正孔対の再結
合中心として作用するＮａxＴｉyＯzの生成を防止する
ため、ソーダ石灰ガラス表面に二酸化ケイ素層を形成
し、この二酸化ケイ素層を介して、酸化チタンの薄膜を
配することもできる。一方、可視光触媒としてはルテニ
ウムビピリジン三錯体、ポリフィリン、ポリフェニレン
等が用いられる。この内ルテニウムビピリジン三錯体
が、耐久性が高く望ましい。In the present invention, it is necessary to select a light-transmitting substance which has as low absorption as possible with respect to light having a wavelength at which the catalytic activity of the visible light catalyst is maximized. As an ultraviolet light catalyst to be used, titanium oxide (Ti
O 2 ), zinc oxide (ZnO), tungsten oxide (W
O 3 ) or strontium titanate (SrTiO 3 )
Etc. can be used. Among them, titanium oxide is preferably used as the ultraviolet light catalyst. Titanium oxide, particularly anatase-type titanium oxide, has an extremely high photoactivity, and works effectively even with a small amount of ultraviolet light emitted from a normal fluorescent lamp.
Furthermore, titanium oxide has a remarkably large absorption for ultraviolet light having a wavelength of less than 380 nm, and does not absorb light having a wavelength of 400 nm or more at all. For this reason, it is possible to prevent the ultraviolet light from reaching the visible light catalyst layer completely, while preventing the visible light catalyst from deteriorating, while having good visible light transmission. When soda-lime glass is selected as the light transmitting material, the formation of Na x Ti y O z acting as a recombination center of electron-hole pairs when forming a thin film of titanium oxide on the surface at a high temperature is considered. To prevent this, a silicon dioxide layer may be formed on the surface of soda-lime glass, and a thin film of titanium oxide may be provided via the silicon dioxide layer. On the other hand, as a visible light catalyst, a ruthenium bipyridine tricomplex, porphyrin, polyphenylene, or the like is used. Of these, the ruthenium bipyridine tricomplex has high durability and is desirable.
【０００７】紫外光触媒の固定はディップコート法によ
って容易に行うことができる。基板となる光透過性物
を、触媒成分を溶解ないし分散させた液に浸漬し引き上
げて乾燥する。触媒プリカーサ成分が配合された液を用
いた場合には、熱処理や化学反応など適宜必要な処理を
行って触媒とする。なお、ゾル・ゲル法を応用すること
は、この方法が装置コストが安価で、また生産性が良
く、さらに均一な触媒層が得られるので好ましい。この
方法は、特開平５−９４７６５号公報等で知られている
方法を応用するもので、上記筒状物を触媒ないし触媒プ
リカーサを配合した液性ゾルに浸漬した後これを引き上
げて該要処理物表面に触媒または触媒プリカーサを有す
るゲル層を形成し、その後これを乾燥ないし熱処理して
触媒層を形成する方法である。なお、触媒層の形成を必
要としない箇所については、シールして上記処理を行え
ばよい。The fixing of the ultraviolet photocatalyst can be easily performed by the dip coating method. The light-transmitting substance serving as a substrate is immersed in a liquid in which a catalyst component is dissolved or dispersed, pulled up, and dried. When a liquid containing a catalyst precursor component is used, a necessary treatment such as a heat treatment or a chemical reaction is performed to obtain a catalyst. It is preferable to apply the sol-gel method, because this method has a low equipment cost, has good productivity, and can obtain a uniform catalyst layer. This method applies a method known in Japanese Patent Application Laid-Open No. 5-94765 or the like. The above cylindrical material is immersed in a liquid sol containing a catalyst or a catalyst precursor, and is then pulled up to perform the necessary treatment. This is a method in which a gel layer having a catalyst or a catalyst precursor is formed on the surface of a product, and then this is dried or heat-treated to form a catalyst layer. It should be noted that a portion where the formation of the catalyst layer is not required may be sealed and the above-described treatment may be performed.
【０００８】可視光触媒は通常イオン交換樹脂を介して
固定する。これは可視光触媒層の基板への密着性を向上
させるためであるが、通常の密着性で充分な場合にはイ
オン交換樹脂層を省いても良い。イオン交換樹脂を介し
て固定する場合には、まず基板をイオン交換樹脂を溶解
した溶液に浸漬した後乾燥してイオン交換樹脂層を形成
する。その後可視光触媒を溶解させた溶液を流し、イオ
ン交換樹脂の有する官能基と可視光触媒とのイオン交換
性を利用して可視光触媒を固定して触媒層を形成する。The visible light catalyst is usually fixed via an ion exchange resin. This is to improve the adhesion of the visible light catalyst layer to the substrate. However, if ordinary adhesion is sufficient, the ion exchange resin layer may be omitted. When fixing via an ion exchange resin, the substrate is first immersed in a solution in which the ion exchange resin is dissolved, and then dried to form an ion exchange resin layer. Thereafter, a solution in which the visible light catalyst is dissolved is flowed, and the visible light catalyst is fixed using the ion exchange property between the functional group of the ion exchange resin and the visible light catalyst to form a catalyst layer.
【０００９】上記のように作製された光触媒素子の例を
図１に符号Ａを付して示す。図中左方より原料（ここで
は有害物質を含む液体）がファン（図示せず）により本
ユニットに導入される。光触媒素子上方より可視光及び
紫外光が照射されていて、上面では紫外光触媒の働き
で、下面では可視光触媒の働きで有害物が酸化（分解）
されて反応物として排出される。このように光触媒素子
Ａはその上下両面で除臭や有害物資の除去を行うことが
できるので、光触媒装置に組み込まれた場合、装置をコ
ンパクトなものとすることができる。このような光触媒
ユニットは、その構造上圧力損失が非常に小さいにも拘
わらず、容積当たりの有効面積を容易に増やすことがで
きるので、作製が容易で、全体がコンパクトとなものと
することができる。An example of the photocatalyst element manufactured as described above is shown in FIG. Raw materials (here, liquid containing harmful substances) are introduced into the unit from the left side of the figure by a fan (not shown). Visible light and ultraviolet light are irradiated from above the photocatalyst element, and harmful substances are oxidized (decomposed) by the function of the ultraviolet light catalyst on the upper surface and by the function of the visible light catalyst on the lower surface.
And discharged as a reactant. As described above, since the photocatalytic device A can perform deodorization and removal of harmful substances on both upper and lower surfaces thereof, the device can be made compact when incorporated in the photocatalytic device. Such a photocatalyst unit can easily increase the effective area per volume, despite the fact that the pressure loss is very small due to its structure, so that it is easy to manufacture and the whole can be made compact. it can.
【００１０】[0010]
【実施例】（実施例の光触媒素子の作製） 〔紫外光触媒の担持〕酸化チタンスラリー（石原産業製
ＳＴＳ−０１）に片面をマスキングして保護したガラス
板を浸漬した後、４ｍｍ／ｍｉｎの速度で引き上げ、そ
の後風乾してゲル層を形成した。上記ガラス板を５００
℃で１時間熱処理することにより更に光触媒活性の高い
酸化チタニウム層（厚さ２μｍ）が形成された。Example (Preparation of Photocatalyst Element of Example) [Supporting of Ultraviolet Photocatalyst] A glass plate protected on one side by masking one side in a titanium oxide slurry (STS-01 manufactured by Ishihara Sangyo Sangyo Co., Ltd.) was immersed, and then at a speed of 4 mm / min. , And air-dried to form a gel layer. 500 pieces of the above glass plate
Heat treatment at 1 ° C. for 1 hour formed a titanium oxide layer (thickness: 2 μm) having higher photocatalytic activity.
【００１１】〔可視光触媒の担持〕上記紫外光触媒を有
する面をマスキングし、イオン交換樹脂アルコール溶液
（デュポン製ナイフィオンＮＲ−５０）に浸漬した後乾
燥させ、イオン交換樹脂を担持させた。さらにこのガラ
ス板をルテニウムビピリジン三錯体水溶液（０．１ｇ／
ｌ）に４時間浸漬し、イオン交換により吸着させ、一面
に紫外光触媒層、他面に可視光触媒層を有する実施例の
光触媒素子を得た。[Support of Visible Light Catalyst] The surface having the ultraviolet light catalyst was masked, immersed in an alcohol solution of ion exchange resin (Nifion NR-50 manufactured by DuPont), and dried to support the ion exchange resin. Further, the glass plate was coated with an aqueous ruthenium bipyridine tricomplex solution (0.1 g /
l) for 4 hours and adsorbed by ion exchange to obtain a photocatalyst element of an example having an ultraviolet photocatalyst layer on one side and a visible light catalyst layer on the other side.
【００１２】（比較例１：紫外光触媒と可視光触媒とを
同じ面に有する光触媒素子の作製）実施例１で用いたも
のと同じ酸化チタンスラリー中に対酸化チタン重量比で
イオン交換樹脂の量が１０重量％となるようイオン交換
樹脂アルコール溶液（実施例１で用いたものと同じも
の）を添加し、充分に撹拌した。この溶液にガラス板を
浸漬し、４ｍｍ／ｍｉｎの速度で引き上げ、その後風乾
してゲル層を形成した。さらにこのガラス板を０．１ｇ
／ l−ルテニウムビピリジン三錯体水溶液に４時間浸漬
し、イオン交換により吸着させ、紫外光触媒層中に可視
光触媒を有する光触媒素子を作製した。(Comparative Example 1: Preparation of a photocatalyst element having an ultraviolet light catalyst and a visible light catalyst on the same surface) In the same titanium oxide slurry as used in Example 1, the amount of the ion exchange resin was determined by the weight ratio to titanium oxide. An ion exchange resin alcohol solution (the same as that used in Example 1) was added so as to be 10% by weight, and the mixture was sufficiently stirred. A glass plate was immersed in this solution, pulled up at a speed of 4 mm / min, and then air-dried to form a gel layer. 0.1g of this glass plate
/ L-ruthenium bipyridine tricomplex aqueous solution for 4 hours and adsorbed by ion exchange to produce a photocatalytic device having a visible light catalyst in the ultraviolet photocatalyst layer.
【００１３】（比較例２：紫外光触媒のみを１面に有す
る光触媒素子の作製）実施例の紫外光触媒の担持と同様
にして、ガラス板の１面に紫外光触媒を設け比較例２の
素子として以下用いた。(Comparative Example 2: Preparation of a photocatalytic device having only an ultraviolet photocatalyst on one surface) In the same manner as in carrying the ultraviolet photocatalyst of the example, an ultraviolet photocatalyst was provided on one surface of a glass plate, and the device of Comparative Example 2 was prepared as follows. Using.
【００１４】〔評価方法〕上記で作製した実施例の素子
は紫外線触媒層を光の入射側に向け、比較例１および比
較例２の素子は触媒層を光の入射側に向けて、それぞれ
１２ｃｍの距離にメタルハライドランプＤ１２５Ｗ（東
芝ライテック製）を置いて照射した。これらの光触媒素
子の３月後までの１００ｐｐｍ−トリクロロエタン水溶
液に対する分解能を調べた。結果をそのときの比較例２
の素子の分解能を１としたときの比で表１に示す。[Evaluation Method] In the devices of the above-mentioned examples, the ultraviolet catalyst layer was directed to the light incident side, and the devices of Comparative Examples 1 and 2 each had the catalyst layer directed to the light incident side. A metal halide lamp D125W (manufactured by Toshiba Lighting & Technology Corp.) was placed at a distance of to irradiate. The resolution of these photocatalytic devices with respect to a 100 ppm-trichloroethane aqueous solution up to three months later was examined. Comparative Example 2 at that time
Table 1 shows the ratio when the resolution of the element of Example 1 is 1.
【００１５】[0015]
【表１】 [Table 1]
【００１６】上記のように、従来技術に係る比較例１の
素子ではその可視光触媒の効果は３０日後より低下し、
３ヶ月後にはその効果が約３／４になるのに対し、本発
明の光触媒素子の可視光触媒の効果は３ヶ月程度まで性
能の低下がないことが判る。As described above, in the device of Comparative Example 1 according to the prior art, the effect of the visible light catalyst is reduced after 30 days.
It can be seen that the effect of the visible light catalyst of the photocatalyst element of the present invention does not decrease until about three months, whereas the effect becomes about 3/4 after three months.
【００１７】[0017]
【発明の効果】本発明に係る光触媒素子はコンパクトな
光触媒装置を可能とし、さらに長期間使用しても劣化し
ない極めて優れたものである。The photocatalyst element according to the present invention enables a compact photocatalyst device and is extremely excellent without deterioration even after long-term use.
【図１】本発明に係る光触媒素子を示す概念図である。FIG. 1 is a conceptual diagram showing a photocatalytic device according to the present invention.
【図２】従来の光触媒素子を示す概念図である。FIG. 2 is a conceptual diagram showing a conventional photocatalytic device.
Ａ 本発明に係る光触媒素子 A Photocatalytic device according to the present invention
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ０２Ｆ 1/58 Ｃ０２Ｆ 1/58 Ａ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI C02F 1/58 C02F 1/58 A
Claims (2)
有し、光透過側に可視光触媒層を有することを特徴とす
る光触媒素子。1. A photocatalytic device having an ultraviolet light catalyst layer on the light incident side of a light transmitting material and a visible light catalyst layer on the light transmitting side.
介して光透過性物に配されていることを特徴とする請求
項１に記載の光触媒素子。2. The photocatalytic device according to claim 1, wherein the visible light catalyst layer is disposed on the light transmitting material via an ion exchange material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9347887A JPH11169723A (en) | 1997-12-17 | 1997-12-17 | Photocatalyst element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9347887A JPH11169723A (en) | 1997-12-17 | 1997-12-17 | Photocatalyst element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11169723A true JPH11169723A (en) | 1999-06-29 |
Family
ID=18393279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9347887A Withdrawn JPH11169723A (en) | 1997-12-17 | 1997-12-17 | Photocatalyst element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11169723A (en) |
-
1997
- 1997-12-17 JP JP9347887A patent/JPH11169723A/en not_active Withdrawn
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