JPH0751646A - Method for cleaning off contaminant on solid matter surface - Google Patents

Method for cleaning off contaminant on solid matter surface

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Publication number
JPH0751646A
JPH0751646A JP22216993A JP22216993A JPH0751646A JP H0751646 A JPH0751646 A JP H0751646A JP 22216993 A JP22216993 A JP 22216993A JP 22216993 A JP22216993 A JP 22216993A JP H0751646 A JPH0751646 A JP H0751646A
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surface
solid
semiconductor particles
optical semiconductor
light
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JP22216993A
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Japanese (ja)
Inventor
Sadao Murasawa
Shigure Teramoto
しぐれ 寺本
貞夫 村澤
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Ishihara Sangyo Kaisha Ltd
石原産業株式会社
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Abstract

PURPOSE:To clean off the contaminant on the surface of a solid matter and to prevent the deposition of contaminant by loading an optical semiconductor particle on the surface of a solid matter likely to be contaminated by the adhesion of org. matter in the air and then irradiating the surface with a light contg. UV to decompose the org. matter adhered on the solid matter surface. CONSTITUTION:An optical semiconductor particle is applied on the surface of a solid matter likely to be contaminated with the org. matter in the air or the particle is blown against the surface, and then the surface is dried to carry the particle. The particle on the surface is then irradiated with a light of wavelength having an energy above the band gap of the particle. A light contg. UV is cited as the light, and the dose, irradiation time, etc., are set in conformity to the amt. of org. matter to be treated. The org. matter in the air, the fat secreted from the animal skin, etc., are decomposed in this way.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、固体表面の有機物による汚れを光触媒機能により分解して、固体表面の汚れを浄化する方法に関する。 The present invention relates to a contamination with organic substances solid surface is decomposed by the photocatalytic function, to a method for purifying soil solid surfaces.

【0002】 [0002]

【従来の技術】タバコの煙粒子やヤニ、排気ガス中に含まれる炭化水素、ばい煙、種々の油脂分、花粉、虫などの死骸などの有機物は、空気中に浮遊したり飛散したりして自動車、電車、建造物、電気機器などの壁面、床、 Smoke particles and tar BACKGROUND ART Tobacco, hydrocarbons contained in the exhaust gas, soot, various oils and fats, pollen, organic substances such as dead insects, or by scatter or airborne automobiles, trains, buildings, walls, such as electrical equipment, floor,
天井、屋根、ドア、窓ガラスなどの固体表面に付着し、 Ceiling, attached roof, door, to a solid surface such as a window glass,
固体表面を汚す。 Defile the solid surface. また、固体表面に動物の体の一部が接触し動物の皮膚から分泌される脂が付着して汚れが生ずる場合もある。 Also, fat part of the animal body to the solid surface is secreted from the skin of contact with animals sometimes dirt adhering occurs. さらに、前記の有機物や動物の皮膚から分泌される脂が付着した固体表面は泥、土やほこりが付着し易く、汚れがより一層ひどくなる。 Furthermore, solid surface fat deposited secreted from the skin of the organic matter and animals mud, tends to adhere soil and dust, dirt becomes more severely. これらの固体表面に生じた汚れは、機械や人力により水洗したりあるいは拭き取ったりして取り除いているのが現状である。 Dirt occurring in these solid surface, at present are removed by or wipe or or washing by machine or manually.

【0003】 [0003]

【発明が解決しようとする課題】水洗したりあるいは拭き取ったりする前記の清掃作業は、汚れが生じるたびに行う必要があり、また、乾燥作業が必要になったりするため、手間や時間がかかる面倒な作業である。 SUMMARY OF THE INVENTION An object of the cleaning operation for which is or or wipe or washing with water, must be done each time a dirt occurs, also, since the drying operation may become necessary, troublesome take labor and time a Do not work.

【0004】 [0004]

【課題を解決するための手段】本発明者らは、前記の清掃作業に代わる、簡便、かつ、容易な方法を探索した結果、空気中に存在している有機物や動物の皮膚から分泌される脂により汚れを生ずる恐れのある固体表面に光半導体粒子を担持し、次いで、該光半導体粒子に紫外線を含有した光を照射して、該固体表面に付着した該有機物や動物の皮膚から分泌される脂を分解し浄化することができることを見出し、本発明を完成した。 The present inventors have SUMMARY OF THE INVENTION are alternative to the cleaning work, simple, and, as a result of searching for an easy way, is secreted from organic substances and animal skin that are present in the air the optical semiconductor particles carried on the solid surface with a risk of causing contamination by fat, then irradiating light containing ultraviolet light semiconductor particles are secreted from the skin of the organic substances and animals attached to the solid surface that fat decomposing found that it is possible to purify, thereby completing the present invention.

【0005】すなわち、本発明は、空気中に存在している有機物や動物の皮膚から分泌される脂が固体表面に付着して生ずる固体表面の汚れを簡便、かつ容易に浄化し、汚れの付着を防止する方法を提供する。 Namely, the present invention may conveniently dirt solid surface fat occurs attached to a solid surface to be secreted from the organic substances and animal skin that are present in the air, and readily purified, adhesion of contamination It provides a method of preventing.

【0006】本発明は、空気中に存在している有機物や人、犬、猫などの動物の皮膚から分泌される脂の付着により汚れを生ずる恐れのある固体表面に光半導体粒子を担持し、次いで、該光半導体粒子に紫外線を含有した光を照射して、該固体表面に付着した該有機物や動物の皮膚から分泌される脂を分解して、固体表面を浄化する。 The present invention, an optical semiconductor particles carried on the solid surface with a risk of causing contamination organic substances and who are present in the air, dogs, the fat deposition of secreted from the skin of animals such as cats, then, by irradiating light containing ultraviolet rays to the optical semiconductor particles, to decompose the fat secreted from the skin of the organic substances and animals attached to the solid surface, to clean a solid surface.
本発明において、固体表面に付着して汚れを生ずる、空気中に存在している有機物としては、たとえば、タバコの煙粒子やヤニ、排気ガス中に含まれる炭化水素、ばい煙、種々の油脂分、花粉、虫などの死骸などの種々の炭素化合物が挙げられる。 In the present invention, resulting in dirt adhering to the solid surface, as the organic substances present in the air, for example, cigarette smoke particles and tar, hydrocarbons contained in the exhaust gas, soot, various oils and fats, pollen, include various carbon compounds such as dead insects. また、前記の固体は、金属、合金、セラミックス、ガラス、プラッスチックス、ゴム、 Furthermore, the solids, metals, alloys, ceramics, glass, plat scan Chicks, rubber,
木、紙などの材質によって作製されているものであり、 Wood, which is produced by the material, such as paper,
固体の大きさや形には特に制限されない。 The size and shape of the solid is not particularly limited. しかも、塗装した固体でも用いることができる。 Moreover, it can be used in the coating solids. 具体的には、自動車、電車などの交通機関、テーブル、キャビネットなどの家具、テレビ、電子レンジ、ワードプロセッサー、コンピューターなどの電気機器、建造物などの壁面、床、 Specifically, automotive, transportation such as a train, tables, furniture, such as cabinet, TV, microwave oven, word processor, electrical equipment such as a computer, a wall, such as the building, floor,
天井、屋根、ドア、窓ガラスやブラウン管、受像管、画面などのディスプレイさらにはカメラレンズ用の光学フィルターなどが挙げられる。 Ceiling, roof, door, window glass and cathode-ray tube, cathode ray tube, further display, such as a screen such as an optical filter for a camera lens, and the like. 本発明は、空気中に存在している有機物や動物の皮膚から分泌される脂の付着による汚れが目立つガラス、特に交通機関のフロントガラスを含めた窓ガラスや建造物の窓ガラスへの適用が好ましい。 The present invention, glass contamination by fat deposition of secreted from organic substances and animal skin that are present in the air is conspicuous, in particular application to glazing of the window glass and buildings, including the windshield transportation preferable. また、本発明は、静電気により空気中に存在している有機物や動物の皮膚から分泌される脂が強固に付着し易い電気機器のディスプレイへの適用が好ましい。 Further, the present invention is applied to a display of easy electrical equipment fat firmly adhered secreted from organic substances and animal skin that are present in the air is preferred by static electricity.

【0007】これらの固体の表面に担持する光半導体粒子とは、そのバンドギャップ以上のエネルギーを持つ波長の光を照射すると光励起により伝導帯に電子を、価電子帯に正孔を生じる物質をいい、この光励起により生じた電子の持つ強い還元力や正孔の持つ強い酸化力は、従来から悪臭ガスの分解、水の浄化、水の分解などに利用されている。 [0007] The optical semiconductor particles carried on the surface of these solid, electrons in the conduction band by the light excitation is irradiated with light of a wavelength having an energy greater than the band gap refers to a substance that produces a positive hole in the valence band , strong oxidizing power with a strong reducing power and hole with the electrons generated by this optical excitation, decomposition of malodorous gases from conventional, water purification, and is utilized such as the decomposition of water. 光半導体粒子としては、たとえば、酸化チタン、酸化亜鉛、酸化タングステン、酸化鉄、チタン酸ストロンチウムなどの公知の金属化合物半導体を、単一または2種以上を組み合わせて用いることができる。 The optical semiconductor particles, such as titanium oxide, zinc oxide, tungsten oxide, iron oxide, a known metal compound semiconductors such as strontium titanate, can be used in combination of more than a single or two or. 特に、高い光触媒機能を有し、化学的に安定であり、かつ、無害である酸化チタンが好ましい。 In particular, it has a high photocatalytic function, chemically stable, and titanium oxide is preferably harmless. 本発明においては、光半導体粒子を固体表面に担持させて、固体表面に光半導体粒子の層を形成させることもできる。 In the present invention, an optical semiconductor particles are supported on a solid surface, it is also possible to form a layer of optical semiconductor particles on a solid surface. 光半導体粒子の層は透明性を有するものが好ましく、可視領域の550nmの波長の光を基準として、光拡散透過率が5 Preferably has a layer of optical semiconductor particles having transparency, as a reference light having a wavelength of 550nm in the visible region, the light diffusion transmittance 5
0%以上、特に70%以上であるものが好ましい。 0% or more, are preferred in particular 70% or more.

【0008】前記の光半導体粒子を固体表面に担持するには、300〜600℃程度の温度に加熱した固体表面に、熱分解して光半導体粒子となる金属塩を溶解させたアルコール溶液、または有機金属化合物を溶解させた有機溶媒系の溶液をスプレーする方法、揮発性の金属ハロゲン化物や有機金属化合物などを高温で熱分解するCV [0008] carrying said optical semiconductor particles on a solid surface, the solid surface is heated to a temperature of about 300 to 600 ° C., thermal decomposition to the alcohol solution to dissolve the metal salt as the optical semiconductor particles or, how to solution sprayed organic solvent system to dissolve the organometallic compound, thermally decomposed CV volatile metal halides and organometallic compounds and the like at a high temperature
D法、金属のアルコキシドやアセチルアセトナートを有機溶媒に溶解した液に固体を浸漬し、引上げ、次いで、 Method D, a metal alkoxide and acetylacetonate solid was immersed in a liquid dissolved in an organic solvent, pulling, then,
乾燥し、焼成するゾル−ゲル法、真空下、金属または金属酸化物を抵抗加熱あるいは電子ビーム加熱により気化させ、加熱した固体に光半導体粒子を沈着させる真空蒸着法、減圧下、プラズマを利用したスパッタ法などの方法が用いられる。 Dried, the sol is fired - gel method, under vacuum, vaporized by resistance heating or electron beam heating a metal or metal oxide, a vacuum deposition method of depositing an optical semiconductor particles to the heated solid under reduced pressure, using plasma method such as a sputtering method is used.

【0009】また、本発明においては、光半導体粒子を公知の方法によって得、次いで、得られた光半導体粒子を下記の方法によっても固体表面に担持することができる。 [0009] In the present invention, to obtain an optical semiconductor particles by known methods, then it is possible to carry the obtained optical semiconductor particles on a solid surface by the following method. 光半導体粒子を、たとえば、水、アルコール、トルエンなどの溶媒に懸濁させる。 The optical semiconductor particles, for example, water, alcohols, is suspended in a solvent such as toluene. 必要に応じて分散剤や結着剤を加えても良い。 It may be added a dispersant or binder if necessary. 得られた懸濁液を、たとえば、含浸法、ディップコーティング法、スピナーコーティング法、ローラーコーティング法、ワイヤーバーコーティング法、リバースロールコーティング法などの塗布方法やスプレーコーティング法などの吹き付け方法などを用いて、固体表面の塗布し、あるいは吹き付けし、次いで、 The resulting suspension, for example, impregnation, dip coating, spinner coating, roller coating, wire bar coating method, by using a spraying method such as coating method or spray coating method such as reverse roll coating , coated solid surfaces, or to spraying, then
乾燥して光半導体粒子を担持させる。 It dried supporting the optical semiconductor particles. 付着した光半導体粒子は必要に応じて焼成しても良く、この焼成により、 Attached optical semiconductor particles may be calcined if necessary, by the firing,
光半導体粒子を固体表面に強固に接着させることができる。 The optical semiconductor particles can be firmly adhered to a solid surface. 前記の焼成は100℃以上、好ましくは200〜8 Wherein the firing is 100 ° C. or higher, preferably 200-8
00℃、特に好ましくは300〜800℃の温度に焼成するのが適当である。 00 ° C., particularly preferably appropriate to calcination at a temperature of 300 to 800 ° C.. 前記の光半導体粒子の光触媒機能を向上させるために、該光半導体粒子の表面に白金、 In order to improve the photocatalytic function of the optical semiconductor particles, platinum on the surface of the optical semiconductor particles,
金、銀、銅、パラジウム、ロジウム、ルテニウムなどの金属、酸化ルテニウム、酸化ニッケルなどの金属酸化物を被覆してもよい。 Gold, silver, copper, palladium, rhodium, a metal such as ruthenium, ruthenium oxide, may be coated with metal oxides such as nickel oxide.

【0010】550nmの波長の光拡散透過率が50% [0010] Light diffusion transmittance at a wavelength of 550nm is 50%
以上、特に70%以上である光半導体粒子の層は、前記のスプレー法、CVD法、ゾル−ゲル法、真空蒸着法、 Above, a layer of optical semiconductor particles in particular 70%, spraying said, CVD method, a sol - gel method, vacuum deposition method,
スパッタ法などの反応条件を適宜設定したり、あるいは、前記の光半導体粒子を塗布し、あるいは吹き付けする場合には、用いる光半導体粒子の粒子径を適宜選択することにより得られる。 To set the reaction conditions such as sputtering as appropriate, or, wherein the optical semiconductor particles is applied in, or in the case of spraying can be obtained by suitably selecting the particle diameter of the optical semiconductor particles used.

【0011】次に、固体表面に担持した光半導体粒子に、その光半導体粒子のバンドギャップ以上のエネルギーを持つ波長の光を照射する。 [0011] Next, the optical semiconductor particles carrying the solid surface is irradiated with light of a wavelength having a band gap energy higher than the optical semiconductor particles. 前記の光としては、紫外線を含有した光が挙げられ、たとえば、太陽光や蛍光灯、ブラックライト、ハロゲンランプ、キセノンフラッシュランプ、水銀灯などの光を用いることができる。 As the light, it includes light containing ultraviolet rays, for example, sunlight or a fluorescent lamp, black light, halogen lamp, xenon flash lamp, can be used the light of a mercury lamp. 特に、300〜400nmの近紫外線を含有した光が好ましい。 In particular, the light containing the near-ultraviolet rays of 300~400nm is preferred. 光の照射量や照射時間などは処理する有機物や動物の皮膚から分泌される脂の量などによって適宜設定できる。 Such as light irradiation amount and the irradiation time can be appropriately set depending on the amount of fat that is secreted from the skin of organic matter or animal to be treated. このようにして、空気中に存在していた有機物や動物の皮膚から分泌される脂を分解することができ、固体表面に付着した汚れを浄化し、汚れの付着を防止することができる。 In this way, it is possible to decompose the fat secreted from organic substances and animal skin that was present in the air, cleaned the dirt adhered to the solid surface, it is possible to prevent adhesion of dirt.

【0012】 [0012]

【実施例】 【Example】

実施例1 80g/lの硫酸チタニル溶液1リットルを85℃に加熱し、この温度で3時間保持し、硫酸チタニルを加水分解して酸化チタン粒子を得た。 The titanyl l of solution of sulfuric acid Example 1 80 g / l was heated to 85 ° C., and held at this temperature for 3 hours to yield titanium oxide particles by hydrolysis of titanyl sulfate. このようにして得られた酸化チタン粒子を濾過し、洗浄した後、水に分散させて、TiO 2基準で200g/lの懸濁液とした。 Thus filtered titanium oxide particles obtained, washed, dispersed in water and a suspension of 200 g / l with TiO 2 basis. 次いで、この懸濁液に硝酸水溶液を添加し、該懸濁液のpH Then, nitric acid was added an aqueous solution to the suspension, pH of the suspension
を1.0にした後、オートクレーブに入れ、180℃の温度で13時間、飽和水蒸気圧下で水熱処理を行った。 After the 1.0, placed in an autoclave, for 13 hours at a temperature of 180 ° C., to a hydrothermal treatment in saturated water vapor pressure was carried out.
次に、水熱処理後の酸化チタン粒子の懸濁液に、該酸化チタン粒子のTiO 2基準に対して、ポリエチレングリコール(平均分子量20000)を40重量%添加し、 Next, to a suspension of titanium oxide particles after the hydrothermal treatment, with respect to TiO 2 criteria titanium oxide particles, polyethylene glycol (average molecular weight 20000) was added 40 wt%,
60℃の温度に加熱した後、この懸濁液をドクターブレード(間隙60μm)を用いてガラス板(縦5cm、横5cm)に塗布し、自然乾燥した後、450℃の温度で3時間焼成して、酸化チタン粒子の層をガラス板に担持した。 After heating to a temperature of 60 ° C., a glass plate (length 5 cm, horizontal 5 cm) and the suspension using a doctor blade (gap 60 [mu] m) is applied to, was naturally dried, then calcined 3 hours at a temperature of 450 ° C. Te, a layer of titanium oxide particles supported on a glass plate.

【0013】前記のガラス板に担持した酸化チタン粒子はアナタース型結晶を有し、その酸化チタン粒子の層の膜厚は7.5μmであった。 [0013] Titanium oxide particles supported on the glass plate has anatase crystal, thickness of the layer of the titanium oxide particles was 7.5 [mu] m. また、550nmの波長での光拡散透過率は、使用したガラス板が90%であったのに対し、酸化チタン粒子の層を担持したガラス板では80%であった。 Further, the light diffusion transmittance at a wavelength of 550 nm, whereas the glass plate used was 90%, was 80% in the glass plate carrying the layer of titanium oxide particles.

【0014】次に、前記の酸化チタン粒子を担持したガラス板の表面の浄化を下記のようにして調べた。 [0014] Next, examined the cleaning of the surface of the glass plate carrying the titanium oxide particles as follows. 有機物は、食用油の主成分であり、食用油使用時に空気中に飛散して、壁などを茶色に着色して汚すリノール酸トリグリセリドを用いた。 Organic matter, the major component of the edible oil, and airborne when edible oil used, wall, etc. with linoleic acid triglyceride dirty colored brown. このリノール酸トリグリセリドをガラス板1cm 2当たり0.1mg塗布した後、紫外光強度が7mW/cm 2になるようにブラックライトを照射した。 After the linoleic acid triglyceride was applied 0.1mg per glass plate 1 cm 2, the ultraviolet light intensity was irradiated with black light to be 7 mW / cm 2. ブラックライト照射前と後のガラス板の重量減少から、リノール酸トリグリセリドの分解率を算出した。 From the weight reduction of the black light irradiation before and after the glass plate, it was calculated decomposition rates of linoleic acid triglycerides.
この結果、ブラックライトを2時間照射した時点での分解率は90%であり、ブラックライトを3時間照射した時点での分解率は100%であった。 As a result, a 90% decomposition rate at the time of irradiation with black light for 2 hours, decomposition rate at the time of irradiation with black light for 3 hours was 100%.

【0015】なお、酸化チタン粒子を担持していないガラス板を用いること以外は実施例と同様にしてリノール酸トリグリセリドの分解試験を行った結果、ブラックライトを3時間照射した時点での分解率は0%であった。 [0015] Incidentally, the decomposition rate at the time except for using a glass plate not carrying the titanium oxide particles result of decomposition test of linoleic acid triglyceride in the same manner as in Example, which was irradiated with black light 3 hours It was 0%.

【0016】さらに、酸化チタン粒子の層を担持した前記のガラス板を手で触り、該ガラス板の表面に人の手から分泌した脂を1.5mg付着させた後、紫外光強度が7mW/cm 2になるようにブラックライトを照射した。 Furthermore, it touched by hand the glass plate carrying the layer of titanium oxide particles, after the fat secreted from human hands on the surface of the glass plate is 1.5mg attached, is ultraviolet light intensity 7 mW / was irradiated with a black light so that the cm 2. ブラックライト照射前と後のガラス板の重量減少から、人の手から分泌される脂の分解率を算出した。 From the weight reduction of the black light irradiation before and after the glass plate, it was calculated decomposition rates of fat secreted from a human hand. この結果、ブラックライトを2時間照射した時点での分解率は100%であった。 As a result, the decomposition rate at the time of irradiation with black light for 2 hours was 100%.

【0017】 [0017]

【発明の効果】本発明は、空気中に存在している有機物や動物の皮膚から分泌される脂の付着により汚れを生ずる恐れのある固体表面に光半導体粒子を担持し、次いで、該光半導体粒子に紫外線を含有した光を照射し、該固体表面に付着した該有機物や動物の皮膚から分泌される脂を分解して固体表面の汚れを浄化し、汚れの付着を防止する方法であって、たとえば、タバコの煙粒子やヤニ、排気ガス中に含まれる炭化水素、ばい煙、種々の油脂分、花粉、虫などの死骸などの空気中に存在している有機物や動物の皮膚から分泌される脂などによって汚れた固体表面を簡便、かつ、容易に浄化することができるので、工業用途ばかりでなく一般家庭用の浄化方法として極めて有用な方法である。 According to the present invention, an optical semiconductor particles carried on the solid surface with a risk of causing contamination by fat deposition of secreted from organic substances and animal skin that are present in the air, then, the optical semiconductor irradiated with light containing ultraviolet rays to the particles by decomposing fat secreted from the skin of the organic substances and animals attached to the solid surface purify soiling solid surfaces, a method for preventing fouling of , for example, secreted cigarette smoke particles and tar, hydrocarbons contained in the exhaust gas, soot, various oils and fats, pollen, from the skin of the organic matter and animals in the air are present, such as dead insects simplify the soiled solid surfaces, such as by lipid, and, because it is easy to clean, a very useful method as purification method for general household well industrial applications. 特に、本発明は、空気中に存在している有機物や動物の皮膚から分泌される脂の付着による汚れが甚だしい交通機関または建造物の窓ガラスや電気機器のディスプレイの表面の浄化に最適である。 In particular, the present invention is optimal for purification of the surface of the display of the window glass and electrical equipment contamination due fat deposition of secreted from organic substances and animal skin that are present in the air severe transportation or building .

Claims (7)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】空気中に存在している有機物の付着により汚れを生ずる恐れのある固体の表面に光半導体粒子を担持し、次いで、該光半導体粒子に紫外線を含有した光を照射して、該固体の表面に付着した該有機物を分解することを特徴とする固体表面の汚れ浄化方法。 1. A light semiconductor particles carried on the surface of a solid with a risk of causing contamination by adhesion of organic substances present in the air, then, is irradiated with light containing ultraviolet rays to the optical semiconductor particles, dirty cleaning method of a solid surface, characterized by decomposing the organic substances adhering to the surface of the solid.
  2. 【請求項2】動物の皮膚から分泌される脂の付着により汚れを生ずる恐れのある固体の表面に光半導体粒子を担持し、次いで、該光半導体粒子に紫外線を含有した光を照射して、該固体の表面に付着した該脂を分解することを特徴とする固体表面の汚れ浄化方法。 2. An optical semiconductor particles carried on the surface of a solid with a risk of causing contamination by fat deposition of secreted from animal skin, then irradiating light containing ultraviolet light semiconductor particles, dirty cleaning method of a solid surface, which comprises decomposing a lipid adhering to the surface of the solid.
  3. 【請求項3】光半導体粒子が酸化チタンであることを特徴とする請求項1また2に記載の固体表面の汚れ浄化方法。 3. A dirty cleaning method for a solid surface according to claim 1 or 2, wherein the optical semiconductor particles are titanium oxide.
  4. 【請求項4】固体の表面に担持した光半導体粒子の層の550nmの波長の光拡散透過率が50%以上であることを特徴とする請求項1または2に記載の固体表面の汚れ浄化方法。 4. A dirty cleaning method according to claim 1 or 2 solid surface according to 550nm light diffusion transmittance at a wavelength of layers of an optical semiconductor particles carrying on the surface of a solid is characterized in that 50% or more .
  5. 【請求項5】請求項1または2に記載の固体がガラスであることを特徴とする固体表面の汚れ浄化方法。 5. A dirty cleaning method of a solid surface, wherein the solid as claimed in claim 1 or 2 is glass.
  6. 【請求項6】請求項5に記載のガラスが交通機関または建造物の窓ガラスであることを特徴とする固体表面の汚れ浄化方法。 6. Soil purification method of a solid surface, wherein the glass according is window glass transportation or building in claim 5.
  7. 【請求項7】請求項1または2に記載の固体が電気機器のディスプレイであることを特徴とする固体表面の汚れ浄化方法。 7. A dirty cleaning method of a solid surface, wherein the solid as claimed in claim 1 or 2 is a display of the electrical device.
JP22216993A 1993-08-12 1993-08-12 Method for cleaning off contaminant on solid matter surface Pending JPH0751646A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08196903A (en) * 1995-01-24 1996-08-06 Agency Of Ind Science & Technol Porous photocatalyst and manufacture thereof
US6013372A (en) * 1995-03-20 2000-01-11 Toto, Ltd. Method for photocatalytically rendering a surface of a substrate superhydrophilic, a substrate with superhydrophilic photocatalytic surface, and method of making thereof
US6090489A (en) * 1995-12-22 2000-07-18 Toto, Ltd. Method for photocatalytically hydrophilifying surface and composite material with photocatalytically hydrophilifiable surface
US6165256A (en) * 1996-07-19 2000-12-26 Toto Ltd. Photocatalytically hydrophilifiable coating composition
US6337129B1 (en) 1997-06-02 2002-01-08 Toto Ltd. Antifouling member and antifouling coating composition
US6387844B1 (en) 1994-10-31 2002-05-14 Akira Fujishima Titanium dioxide photocatalyst
WO2002090008A1 (en) * 2001-05-01 2002-11-14 Center For Advanced Science And Technology Incubation, Ltd. Structure cleaning method and anticorrosion method, and structure using them
US6524664B1 (en) 1996-03-21 2003-02-25 Toto Ltd. Photocatalytically hydrophilifying and hydrophobifying material
US6830785B1 (en) 1995-03-20 2004-12-14 Toto Ltd. Method for photocatalytically rendering a surface of a substrate superhydrophilic, a substrate with a superhydrophilic photocatalytic surface, and method of making thereof
JP2005213142A (en) * 1995-09-15 2005-08-11 Saint-Gobain Glass France Substrate provided with photocatalyst coating
JP2012168044A (en) * 2011-02-15 2012-09-06 Yokogawa Electric Corp Turbidimeter/colorimeter

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6939611B2 (en) 1994-10-31 2005-09-06 Kanagawa Academy Of Science And Technology Window glass employing titanium dioxide photocatalyst
US7327074B2 (en) 1994-10-31 2008-02-05 Kanagawa Academy Of Science And Technology Illuminating devices employing titanium dioxide photocatalysts
US7157840B2 (en) 1994-10-31 2007-01-02 Kanagawa Academy Of Science And Technology Illuminating devices employing titanium dioxide photocatalysts
US6387844B1 (en) 1994-10-31 2002-05-14 Akira Fujishima Titanium dioxide photocatalyst
JPH08196903A (en) * 1995-01-24 1996-08-06 Agency Of Ind Science & Technol Porous photocatalyst and manufacture thereof
US6830785B1 (en) 1995-03-20 2004-12-14 Toto Ltd. Method for photocatalytically rendering a surface of a substrate superhydrophilic, a substrate with a superhydrophilic photocatalytic surface, and method of making thereof
US6013372A (en) * 1995-03-20 2000-01-11 Toto, Ltd. Method for photocatalytically rendering a surface of a substrate superhydrophilic, a substrate with superhydrophilic photocatalytic surface, and method of making thereof
JP2005213142A (en) * 1995-09-15 2005-08-11 Saint-Gobain Glass France Substrate provided with photocatalyst coating
US6090489A (en) * 1995-12-22 2000-07-18 Toto, Ltd. Method for photocatalytically hydrophilifying surface and composite material with photocatalytically hydrophilifiable surface
US6524664B1 (en) 1996-03-21 2003-02-25 Toto Ltd. Photocatalytically hydrophilifying and hydrophobifying material
US6165256A (en) * 1996-07-19 2000-12-26 Toto Ltd. Photocatalytically hydrophilifiable coating composition
US6337129B1 (en) 1997-06-02 2002-01-08 Toto Ltd. Antifouling member and antifouling coating composition
WO2002090008A1 (en) * 2001-05-01 2002-11-14 Center For Advanced Science And Technology Incubation, Ltd. Structure cleaning method and anticorrosion method, and structure using them
JP2012168044A (en) * 2011-02-15 2012-09-06 Yokogawa Electric Corp Turbidimeter/colorimeter

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