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JP2011183240A - Photocatalytic sheet and method for producing the same - Google Patents

Photocatalytic sheet and method for producing the same Download PDF

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JP2011183240A
JP2011183240A JP2010047773A JP2010047773A JP2011183240A JP 2011183240 A JP2011183240 A JP 2011183240A JP 2010047773 A JP2010047773 A JP 2010047773A JP 2010047773 A JP2010047773 A JP 2010047773A JP 2011183240 A JP2011183240 A JP 2011183240A
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titanium oxide
photocatalyst
anatase
foil
oxide base
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JP5474612B2 (en
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Yuko Morito
戸 祐 幸 森
Akira Fujishima
嶋 昭 藤
Go Ochiai
合 剛 落
Kazuya Nakata
田 一 弥 中
Taketoshi Murakami
上 武 利 村
Takuji Horie
江 拓 尓 堀
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HORIE CORP
Kanagawa Academy of Science and Technology
U Vix Corp
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HORIE CORP
Kanagawa Academy of Science and Technology
U Vix Corp
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Priority to US13/394,755 priority patent/US9061086B2/en
Priority to KR1020127022344A priority patent/KR20130041763A/en
Priority to PCT/IB2010/002221 priority patent/WO2011092541A1/en
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Abstract

【課題】
触媒シートに光触媒となるアナターゼ型酸化チタンを強固に担持させると共に剥がれを防止し、さらに、光触媒に接する機会を増大させて、光触媒による浄化処理効率を向上させる。
【解決手段】
チタン箔（１）の片面又は両面から非周期的パターンによるエッチング処理を施して表裏を貫通する多数の微細流路（２）を形成することにより、当該チタン箔（１）を非周期性海綿構造とし、その表面に陽極酸化処理を施した後、加熱処理を施して酸化チタンベース（３）を形成し、当該酸化チタンベース（３）にアナターゼ型酸化チタン粒子（４）を焼き付けた。
【選択図】図２
【Task】
The catalyst sheet firmly supports anatase-type titanium oxide serving as a photocatalyst, prevents peeling, and further increases the chance of contacting the photocatalyst, thereby improving the purification efficiency of the photocatalyst.
[Solution]
The titanium foil (1) is formed into a non-periodic sponge structure by forming a large number of fine channels (2) penetrating the front and back by performing an etching process with a non-periodic pattern from one side or both sides of the titanium foil (1). Then, after anodizing the surface, a heat treatment was performed to form a titanium oxide base (3), and anatase-type titanium oxide particles (4) were baked onto the titanium oxide base (3).
[Selection] Figure 2

Description

本発明は、光触媒となるアナターゼ型酸化チタン粒子が担持された光触媒シート及びその製造方法に関する。   The present invention relates to a photocatalyst sheet on which anatase-type titanium oxide particles serving as a photocatalyst are supported, and a method for producing the photocatalyst sheet.

アナターゼ型の酸化チタンは光触媒として知られており、紫外線照射によりヒドロキシラジカル（・ＯＨ）などの活性種や正孔が生成し、これによって有機物が分解されるため、脱臭効果や殺菌効果が得られ、空気清浄機などに応用されている。   Anatase-type titanium oxide is known as a photocatalyst, and active species such as hydroxy radicals (.OH) and holes are generated by ultraviolet irradiation, which decomposes organic matter, resulting in deodorizing and bactericidal effects. It is applied to air cleaners.

図７は光触媒を利用した従来の流体浄化装置である（特許文献１参照）。
流体浄化装置３１は、ケース３２内部に備えた励起光源３３の周囲を囲うように光触媒構造体３４が配されている。
その光触媒構造体３４は、直径の異なる円筒触媒３５がスペーサ（図示せず）を介して所定の間隔で同心的に配され、各円筒触媒３５は、金属メッシュの全表面に光触媒を担持させて形成されている。
これによれば、円筒触媒３５を同心状に配した三重構造の光触媒構造体３４を用いることによって、光触媒構造体３４の有効表面積が増加し、かつ、通過する流体に乱流が生じるため、流体中の臭気物質との接触割合が大きくなって、臭気物質を短時間で効率よく酸化分解できることが記載されている。 FIG. 7 shows a conventional fluid purification device using a photocatalyst (see Patent Document 1).
In the fluid purification device 31, a photocatalyst structure 34 is arranged so as to surround the excitation light source 33 provided inside the case 32.
In the photocatalyst structure 34, cylindrical catalysts 35 having different diameters are concentrically arranged at predetermined intervals via spacers (not shown). Each cylindrical catalyst 35 has a photocatalyst supported on the entire surface of the metal mesh. Is formed.
According to this, since the effective surface area of the photocatalyst structure 34 is increased by using the triple structure photocatalyst structure 34 in which the cylindrical catalysts 35 are arranged concentrically, and turbulent flow is generated in the fluid passing therethrough, It is described that the contact ratio with the odorous substance in the inside increases, and the odorous substance can be efficiently oxidatively decomposed in a short time.

しかしながら、光触媒となるアナターゼ型の酸化チタンを一般の金属メッシュや金属網目体にコーティングさせようとしても、酸化チタンは結合強度が弱く、担体となる金属表面に形成した酸化チタン膜が剥がれやすいため、製品寿命が短く、有害臭気成分を効率的に分解することができないという問題がある。   However, even if anatase-type titanium oxide serving as a photocatalyst is coated on a general metal mesh or metal network, titanium oxide has low bonding strength, and the titanium oxide film formed on the metal surface serving as a carrier is easily peeled off. There is a problem that the product life is short and the harmful odor components cannot be efficiently decomposed.

特に、円筒触媒３５は、表面積を増やすために細いワイヤを細かく編んだ金属メッシュが用いられるが、そのような金属メッシュで形成された円筒触媒３５は手で軽く握るだけで簡単に凹んでしまう程度に機械的強度が低いため、組み立てが困難なだけでなく、光触媒構造体３４に組み立てた後も取り扱い難い。そして、その外周面を握ることにより表面が撓んでしまうと、広範囲にわたって酸化チタン膜が簡単に剥がれ落ちてしまう。   In particular, the cylindrical catalyst 35 uses a metal mesh formed by finely knitting a thin wire in order to increase the surface area. However, the cylindrical catalyst 35 formed of such a metal mesh can be easily recessed by simply grasping it with a hand. In addition, since the mechanical strength is low, it is not only difficult to assemble, but also difficult to handle after being assembled to the photocatalyst structure 34. And if a surface bends by grasping the outer peripheral surface, a titanium oxide film will peel off easily over a wide range.

特開平１１−２７６５５８号公報Japanese Patent Laid-Open No. 11-276558

そこで、本発明は、光触媒となるアナターゼ型酸化チタンを強固に担持させると共に剥がれを防止し、さらに、光触媒に接する機会を増大させて、光触媒による浄化処理効率を格段に向上させることを技術的課題としている。   Therefore, the present invention provides a technical problem that the anatase-type titanium oxide serving as a photocatalyst is firmly supported and prevented from being peeled off, and further, the chance of contact with the photocatalyst is increased to greatly improve the purification treatment efficiency by the photocatalyst. It is said.

この課題を解決するために、本発明に係る光触媒シートは、アナターゼ型酸化チタン粒子を担持した光触媒シートであって、片面又は両面から非周期的パターンによるエッチング処理を施して表裏を貫通する多数の微細流路が形成された非周期性海綿構造を有するチタン箔の表面に、陽極酸化皮膜による酸化チタンベースが形成され、当該酸化チタンベースにアナターゼ型酸化チタン粒子が焼き付けられたことを特徴としている。
この光触媒シートは、チタン箔の片面又は両面から非周期的パターンによるエッチング処理を施して当該チタン箔を表裏を貫通する多数の微細流路が形成された非周期性海綿構造とし、当該チタン箔に陽極酸化処理を施した後、加熱処理を施してその表面に酸化チタンベースを形成し、当該酸化チタンベースにアナターゼ型酸化チタン粒子を焼き付け製造される。 In order to solve this problem, the photocatalyst sheet according to the present invention is a photocatalyst sheet supporting anatase-type titanium oxide particles, and is subjected to etching treatment with a non-periodic pattern from one side or both sides and passes through the front and back. It is characterized in that a titanium oxide base by an anodic oxide film is formed on the surface of a titanium foil having an aperiodic sponge structure in which fine channels are formed, and anatase-type titanium oxide particles are baked on the titanium oxide base. .
This photocatalyst sheet has a non-periodic sponge structure in which a number of fine channels are formed through the front and back surfaces of the titanium foil by performing an etching process with a non-periodic pattern from one side or both sides of the titanium foil. After anodizing treatment, heat treatment is performed to form a titanium oxide base on the surface, and anatase-type titanium oxide particles are baked on the titanium oxide base.

本発明によれば、材料としてチタン箔を用いているので、フレキシブルなシート状に形成することができ、紫外線空気清浄機の仕様に応じて任意の形状に折り曲げたり巻回したりすることができる。
また、エッチング処理が施されて非周期性海綿構造に形成されているので、チタン箔の表裏を貫通する多数の微細流路が形成され、単純なワイヤメッシュやパンチングメタルなどに比して比評面積を大きくすることができる。
特に、チタン箔の両面からエッチング処理を施すことにより非周期性海綿構造を形成すれば、そのパターンに周期性がないことから、チタン箔の表側と裏側から異なるパターンの孔が形成される。その結果、チタン箔の厚さ方向に複雑な形状のラビリンス流路が形成されるので、自然に存在する海綿構造体と同様、比表面積が著しく大きくなる。 According to the present invention, since the titanium foil is used as the material, it can be formed into a flexible sheet shape, and can be bent or wound into an arbitrary shape according to the specifications of the ultraviolet air cleaner.
In addition, since it has been etched to form a non-periodic sponge structure, a large number of fine channels that penetrate the front and back of the titanium foil are formed, which is a relative evaluation compared to simple wire mesh and punching metal. The area can be increased.
In particular, if a non-periodic sponge structure is formed by performing etching treatment from both sides of the titanium foil, the pattern has no periodicity, so that holes with different patterns are formed from the front side and the back side of the titanium foil. As a result, a labyrinth flow path having a complicated shape is formed in the thickness direction of the titanium foil, so that the specific surface area is remarkably increased as in the case of a naturally occurring sponge structure.

また、チタン箔の表面に形成された陽極酸化皮膜による酸化チタンベースに、アナターゼ型酸化チタン粒子を焼き付けて光触媒層が形成されている。
陽極酸化皮膜による酸化チタンベースと光触媒層は、酸化チタン同士が結合することとなり、その結合性が極めて強く、光触媒層が剥がれ難い。 In addition, a photocatalytic layer is formed by baking anatase-type titanium oxide particles on a titanium oxide base formed by an anodized film formed on the surface of a titanium foil.
The titanium oxide base and the photocatalyst layer formed by the anodized film are bonded to each other, and the bondability is extremely strong, and the photocatalyst layer is difficult to peel off.

さらに、エッチング処理により微細流路を形成したことにより表面が複雑な凹凸形状をなし、陽極酸化皮膜でなる酸化チタンベースはミクロンオーダーの微細なひび割れを生ずるため、その上に光触媒層が強固に結合するだけでなく、表面積が増え、処理効率が格段に向上する。また、ＵＶ光を照射したときに光触媒層の表面及び酸化チタンベースとの界面で乱反射／光散乱が起き、ＵＶ光を効率よく利用できる。
さらにまた、チタン箔を使用したことで光触媒シート自体を軽量に形成することができることから設計の自由度が大きくなり、耐熱性、耐薬品にも優れるため、過酷な使用条件の下でも使用に耐え得る。
このようにシート状に形成されているので、光源の配置によっては両面照射することもでき、多層化することも可能であり、その場合、光触媒効果もより向上することが期待できる。 In addition, the formation of fine flow paths by etching treatment makes the surface complex and uneven, and the titanium oxide base made of an anodized film produces micron-order fine cracks, so the photocatalytic layer is firmly bonded on top. In addition to increasing the surface area, the processing efficiency is greatly improved. Further, when UV light is irradiated, irregular reflection / light scattering occurs at the surface of the photocatalyst layer and the interface with the titanium oxide base, and the UV light can be used efficiently.
Furthermore, the use of titanium foil allows the photocatalyst sheet itself to be made lighter, thus increasing the degree of freedom in design and being excellent in heat resistance and chemical resistance, so it can withstand use even under severe usage conditions. obtain.
Thus, since it forms in a sheet form, depending on arrangement | positioning of a light source, double-sided irradiation can also be carried out and it can also be multilayered, In that case, it can anticipate that the photocatalytic effect improves more.

本発明に係る光触媒シートの一例を示す説明図。An explanatory view showing an example of a photocatalyst sheet concerning the present invention. その製造方法の概略を示す説明図。Explanatory drawing which shows the outline of the manufacturing method. その光触媒シートを用いた空気清浄機の例を示す説明図。Explanatory drawing which shows the example of the air cleaner using the photocatalyst sheet. 本発明に係る他の実施例を示す説明図。Explanatory drawing which shows the other Example which concerns on this invention. その光触媒シートを用いた空気清浄機の例を示す説明図。Explanatory drawing which shows the example of the air cleaner using the photocatalyst sheet. 実験結果を示すグラフ。The graph which shows an experimental result. 従来装置を示す説明図。Explanatory drawing which shows a conventional apparatus.

本発明は、チタン箔に光触媒となるアナターゼ型酸化チタンを強固に担持させると共に剥がれを防止し、さらに、光触媒に接する機会を増大させて、光触媒による浄化処理効率を格段に向上させるという目的を達成するために、チタン箔の片面又は両面から非周期的パターンによるエッチング処理を施して表裏を貫通する多数の微細流路を形成して、当該チタン箔を非周期性海綿構造とし、その表面に陽極酸化処理を施して酸化チタンベースを形成し、当該酸化チタンベースにアナターゼ型酸化チタン粒子を焼き付けて成る。   The present invention achieves the object of significantly improving the purification efficiency of the photocatalyst by firmly supporting the anatase-type titanium oxide serving as the photocatalyst on the titanium foil, preventing peeling, and increasing the chance of contact with the photocatalyst. In order to achieve this, an etching process with a non-periodic pattern is performed from one side or both sides of the titanium foil to form a large number of fine channels that penetrate the front and back surfaces, and the titanium foil has an aperiodic sponge structure, and an anode is formed on the surface. An oxidation treatment is performed to form a titanium oxide base, and anatase-type titanium oxide particles are baked on the titanium oxide base.

図１に示す光触媒シートＳ１は、片面又は両面から非周期的パターンによるエッチング処理を施して表裏を貫通する多数の微細流路２が形成された非周期性海綿構造を有するチタン箔１の表面に、陽極酸化皮膜による酸化チタンベース３が形成され、当該酸化チタンベース３にアナターゼ型酸化チタン粒子４を焼き付けた光触媒層５が形成されている。   The photocatalyst sheet S1 shown in FIG. 1 is formed on the surface of a titanium foil 1 having an aperiodic sponge structure in which a large number of fine channels 2 penetrating the front and back surfaces are formed by etching treatment with a non-periodic pattern from one side or both sides. A titanium oxide base 3 made of an anodized film is formed, and a photocatalytic layer 5 is formed by baking anatase-type titanium oxide particles 4 on the titanium oxide base 3.

図２はその光触媒シートＳ１の製造方法を示す説明図である。
まず、チタン箔１に微細流路２を形成するエッチング処理を行う。エッチング処理は、純チタンを圧延して形成したチタン箔１の表裏両面にフォトレジスト剤６を塗布する塗布工程（図２（ａ））と、レジスト剤６の上から非周期的パターンが形成されたマスキングフィルム７、７を重ねて露光する露光工程（図２（ｂ））と、露光後、レジスト剤の感光していない部分を洗浄して感光した部分をチタン箔表面に残す洗浄工程（図２（ｃ））と、レジスト剤６で非周期網目パターンがマスキングされたチタン箔１をエッチング液に浸漬し、表裏両面からチタン箔１の厚さの半分まで浸食させることにより表裏を貫通する多数の微細流路２…を形成する浸漬工程（図２（ｄ））からなる。 FIG. 2 is an explanatory view showing a method for producing the photocatalytic sheet S1.
First, the etching process which forms the fine flow path 2 in the titanium foil 1 is performed. In the etching process, a non-periodic pattern is formed on the resist agent 6 by applying a photoresist agent 6 on both the front and back surfaces of the titanium foil 1 formed by rolling pure titanium. Exposure process (FIG. 2 (b)), in which the masking films 7 and 7 are overlapped and exposed, and a cleaning process (FIG. 2 (b)) after the exposure, cleaning the unexposed portion of the resist agent and leaving the exposed portion on the titanium foil surface. 2 (c)) and a titanium foil 1 whose non-periodic mesh pattern is masked with a resist agent 6 are immersed in an etching solution and eroded from the front and back surfaces to half the thickness of the titanium foil 1 to penetrate the front and back surfaces. The dipping process (FIG. 2D) for forming the fine flow paths 2.

このように、チタン箔１の両面からエッチング処理を施せば、そのマスキングパターンに周期性がないことから、チタン箔の表側と裏側から異なるパターンの孔が形成される。その結果、図１に示すように、チタン箔１の厚さ方向に複雑なラビリンス状の微細流路２が形成され、単純なメッシュ構造よりも比表面積が著しく大きくなる。
なお、光触媒シートＳ１の空隙率（エッチング処理後の重量／エッチング処理前の重量）は２０％程度である。
また、その表面を拡大観察すると、この時点では、図２（ｅ）に示すように、概ねフラットな状態となっている。 Thus, if the etching process is performed from both surfaces of the titanium foil 1, since the masking pattern has no periodicity, holes having different patterns are formed from the front side and the back side of the titanium foil. As a result, as shown in FIG. 1, a complex labyrinth-shaped fine flow path 2 is formed in the thickness direction of the titanium foil 1, and the specific surface area is significantly larger than that of a simple mesh structure.
The porosity of the photocatalyst sheet S1 (weight after etching process / weight before etching process) is about 20%.
Further, when the surface is enlarged and observed, at this point, as shown in FIG.

次いで、その表面に酸化チタンベース３を形成する陽極酸化処理を行う。
陽極酸化処理は、リン酸浴（例えばリン酸３％水溶液）中で、陽極となるチタン箔１と陰極との間に所定電圧を印加して行われ、その結果、図２（ｆ）に示すように、チタン箔１の表面が酸化されて陽極酸化皮膜が形成される。
このとき、酸化皮膜は、チタン箔１の表裏両面だけでなく、微細流路２の内壁面などリン酸浴に曝されている全表面に形成される。
その後、このチタン箔１を大気中で５５０℃、３時間加熱する加熱処理を施し、陽極酸化皮膜が加熱された酸化チタンベース３が形成される。
その表面を拡大観察すると、エッチング処理した時点でフラットだった表面に、陽極酸化処理及び加熱処理によるひび割れ８が多数出現する。 Next, an anodic oxidation treatment for forming a titanium oxide base 3 on the surface is performed.
The anodizing treatment is performed in a phosphoric acid bath (for example, 3% phosphoric acid aqueous solution) by applying a predetermined voltage between the titanium foil 1 serving as the anode and the cathode, and as a result, as shown in FIG. Thus, the surface of the titanium foil 1 is oxidized to form an anodized film.
At this time, the oxide film is formed not only on both the front and back surfaces of the titanium foil 1 but also on the entire surface exposed to the phosphoric acid bath, such as the inner wall surface of the fine channel 2.
Thereafter, the titanium foil 1 is heated in the atmosphere at 550 ° C. for 3 hours to form a titanium oxide base 3 in which the anodized film is heated.
When the surface is enlarged and observed, many cracks 8 due to anodizing treatment and heat treatment appear on the flat surface at the time of etching treatment.

なお、チタンを陽極酸化処理した場合、その酸化皮膜の厚さに応じて光の干渉により異なる色が発色し、厚さ７０ｎｍ程度で紫色、１５０ｎｍ程度で緑色、２００ｎｍ程度でピンク色を呈することが知られている。
本例では、厚さ７０〜１５０ｎｍの皮膜を形成した。 When titanium is anodized, different colors are generated due to light interference depending on the thickness of the oxide film, and may be purple at a thickness of about 70 nm, green at about 150 nm, and pink at about 200 nm. Are known.
In this example, a film having a thickness of 70 to 150 nm was formed.

そして最後に、アナターゼ型酸化チタン粒子４を担持させる焼き付け処理を行う。
表面に酸化チタンベース３が形成されたチタン箔１を、アナターゼ型酸化チタン粒子４を分散したスラリー中にディッピングした後、これを５５０℃で焼き付けると、図２（ｇ）に示すように、チタン箔１の表裏両面及び微細流路２の内壁面に光触媒層５が形成される。 Finally, a baking process for supporting the anatase-type titanium oxide particles 4 is performed.
When the titanium foil 1 having the titanium oxide base 3 formed on the surface is dipped in a slurry in which anatase-type titanium oxide particles 4 are dispersed and then baked at 550 ° C., as shown in FIG. Photocatalyst layers 5 are formed on both the front and back surfaces of the foil 1 and the inner wall surface of the fine channel 2.

酸化チタンベース３と光触媒層５は、酸化チタン同士が結合することになるので、その結合性が極めて強くなり、その結果、光触媒層５が剥がれ難くなる。   Since the titanium oxide base 3 and the photocatalyst layer 5 are bonded to each other, the bondability thereof is extremely strong, and as a result, the photocatalyst layer 5 is hardly peeled off.

さらに、エッチング処理により微細流路２を形成したことにより表面が複雑な凹凸形状をなし、陽極酸化皮膜でなる酸化チタンベース３はミクロンオーダーの微細なひび割れ８を生ずるため、その上に光触媒層５が強固に結合するだけでなく、表面積が増え、処理効率が格段に向上する。また、ＵＶ光を照射したときに光触媒層５の表面及び酸化チタンベース３との界面で乱反射／光散乱が起き、ＵＶ光を効率よく利用できる。
さらにまた、チタン箔を使用したことで光触媒シート自体を軽量に形成することができることから設計の自由度が大きくなり、耐熱性、耐薬品にも優れるため、過酷な使用条件の下でも使用に耐え得る。 Furthermore, since the fine flow path 2 is formed by the etching process, the surface has a complicated uneven shape, and the titanium oxide base 3 made of the anodized film produces fine cracks 8 on the order of microns. Not only binds firmly, but also increases the surface area and significantly improves the processing efficiency. Further, when UV light is irradiated, irregular reflection / light scattering occurs at the surface of the photocatalyst layer 5 and the interface with the titanium oxide base 3, and the UV light can be used efficiently.
Furthermore, the use of titanium foil allows the photocatalyst sheet itself to be made lighter, thus increasing the degree of freedom in design and being excellent in heat resistance and chemical resistance, so it can withstand use even under severe usage conditions. obtain.

そして、図３に示すように、このように製造された光触媒シートＳ１を円筒状に巻いて、その中心に紫外線光源９を配した光触媒ユニットＵ１とし、これを、空気清浄機の処理チャンバ１０内を流れる空気流に曝すように配して使用することができる。
さらに、光触媒シート１は、シート状に形成されているので、光源の配置によっては両面照射することもでき、多層化することも可能であり、その場合、光触媒効果もより向上することが期待できる。 Then, as shown in FIG. 3, the photocatalyst sheet S1 manufactured in this way is wound into a cylindrical shape to form a photocatalyst unit U1 in which an ultraviolet light source 9 is arranged at the center thereof, and this is set in the processing chamber 10 of the air purifier. Can be used to be exposed to a flowing air stream.
Furthermore, since the photocatalyst sheet 1 is formed in a sheet shape, it can be irradiated on both sides depending on the arrangement of the light source, and can be multi-layered. In that case, the photocatalytic effect can be expected to be further improved. .

本例の光触媒シートＳ２は、図４に示すように、一方向に沿って連続する起伏が折曲形成された波板状に形成されている。
この光触媒シートＳ２も、実施例１の光触媒シートと同様、片面又は両面から非周期的パターンによるエッチング処理を施して表裏を貫通する多数の微細流路２が形成された非周期性海綿構造を有するチタン箔１に陽極酸化処理及び加熱処理を施して、その全表面に陽極酸化皮膜による酸化チタンベース３を形成し、当該酸化チタンベース３にアナターゼ型酸化チタン粒子４を焼き付けた光触媒層５が形成されている。 As shown in FIG. 4, the photocatalyst sheet S <b> 2 of this example is formed in a corrugated plate shape in which undulations continuous in one direction are bent.
Similarly to the photocatalyst sheet of Example 1, this photocatalyst sheet S2 also has an aperiodic sponge structure in which a large number of microchannels 2 penetrating the front and back surfaces are formed by performing etching treatment with a non-periodic pattern from one side or both sides. The titanium foil 1 is subjected to anodizing treatment and heat treatment to form a titanium oxide base 3 with an anodized film on the entire surface, and a photocatalyst layer 5 is formed by baking anatase-type titanium oxide particles 4 on the titanium oxide base 3. Has been.

また、本例では、光触媒シートＳ２を波板状に形成するため、陽極酸化処理を施した後、加熱処理を施す前に、プレス加工により波板状に形成する成形処理を施してチタン箔１の長手方向に沿って連続する起伏を折曲形成している。
この成形加工は、エッチング処理後、酸化チタンベースにアナターゼ型酸化チタン粒子を焼き付ける焼き付け処理の前であればよく、例えば、エッチング処理後、陽極酸化処理の前にプレス加工をしても良い。 Further, in this example, in order to form the photocatalyst sheet S2 in a corrugated plate shape, after the anodizing treatment and before the heat treatment, a forming treatment for forming the corrugated plate shape by press working is performed, and the titanium foil 1 The undulations that continue along the longitudinal direction are bent.
This forming process may be performed after the etching process and before the baking process in which the anatase-type titanium oxide particles are baked on the titanium oxide base. For example, the pressing process may be performed after the etching process and before the anodizing process.

そして、図５に示すように、このように製造された光触媒シートＳ２を円筒状に巻いて、その中心に紫外線光源９を配した光触媒ユニットＵ２とし、これを、空気清浄機の処理チャンバ１０内を流れる空気流に曝すように配して使用することができる。   Then, as shown in FIG. 5, the photocatalyst sheet S <b> 2 manufactured in this way is wound into a cylindrical shape to form a photocatalyst unit U <b> 2 in which an ultraviolet light source 9 is arranged at the center thereof, and this is inside the processing chamber 10 of the air cleaner. Can be used to be exposed to a flowing air stream.

図６は、このように形成した光触媒シートＳ２の空気浄化性能を確認した実験結果を示す。
実験では、容積１ｍ３の密閉空間内に、光触媒シートＳ２を二重に巻きつけた光触媒ユニットＵを置き、中心に波長２５４ｎｍの紫外線光源を配して、この光触媒ユニットＵに対し風速５.５ｍ／ｓの風を吹き付けながら、その密閉空間内の所定濃度のアセトアルデヒドの濃度変化を経時的に測定した。
比較例として、陽極酸化処理を行わないことを除き、同一条件で形成した光触媒シートＳｃを二重に巻きつけた光触媒ユニットＵｃを形成し、同一条件で実験を行った。
そして、これらの実験結果より、夫々のアセトアルデヒドの分解速度定数ｋ１を算出した。
なお、紫外線透過率は、いずれも１２％であった。 FIG. 6 shows the experimental results confirming the air purification performance of the photocatalyst sheet S2 formed in this way.
In the experiment, a photocatalytic unit U in which a photocatalytic sheet S2 is double-wrapped is placed in a sealed space having a volume of 1 m 3 , an ultraviolet light source having a wavelength of 254 nm is arranged at the center, and a wind speed of 5.5 m is applied to the photocatalytic unit U. A change in the concentration of acetaldehyde at a predetermined concentration in the sealed space was measured over time while blowing a / s wind.
As a comparative example, a photocatalyst unit Uc formed by doubling the photocatalyst sheet Sc formed under the same conditions was formed except that no anodizing treatment was performed, and an experiment was performed under the same conditions.
And from these experimental results, the decomposition rate constant k 1 of each acetaldehyde was calculated.
The ultraviolet transmittance was 12% in all cases.

実験結果より算出された分解速度定数は、陽極酸化処理を行わない光触媒シートＳｃを用いたタイプがｋ１＝２.６０であるのに対し、本発明に係る光触媒シートＳ２を用いたタイプはｋ１＝３.５８と、今までに例を見ない抜群の処理能力を有することが確認された。 The decomposition rate constant calculated from the experimental results is k 1 = 2.60 using the photocatalytic sheet Sc that is not subjected to anodization, whereas the type using the photocatalytic sheet S2 according to the present invention is k. It was confirmed that 1 = 3.58, which has an unprecedented processing capacity.

本発明は、医療施設、工場、住宅、オフィスの空気を浄化する空気清浄機や、水を浄化する浄水器の用途に適用し得る。   INDUSTRIAL APPLICABILITY The present invention can be applied to uses of an air purifier that purifies air in medical facilities, factories, houses, and offices, and a water purifier that purifies water.

Ｓ１、Ｓ２ 光触媒シート
１ チタン箔
２ 微細流路
３ 酸化チタンベース
４ アナターゼ型酸化チタン粒子
５ 光触媒層
S1, S2 Photocatalyst sheet 1 Titanium foil 2 Fine channel 3 Titanium oxide base 4 Anatase type titanium oxide particles 5 Photocatalyst layer

Claims (4)

アナターゼ型酸化チタン粒子を担持した光触媒シートであって、
片面又は両面から非周期的パターンによるエッチング処理を施して表裏を貫通する多数の微細流路が形成された非周期性海綿構造を有するチタン箔の表面に、陽極酸化皮膜による酸化チタンベースが形成され、当該酸化チタンベースにアナターゼ型酸化チタン粒子が焼き付けられたことを特徴とする光触媒シート。 A photocatalytic sheet carrying anatase-type titanium oxide particles,
A titanium oxide base with an anodized film is formed on the surface of a titanium foil having a non-periodic sponge structure in which a number of fine channels that penetrate the front and back surfaces are formed by etching with a non-periodic pattern from one or both sides. A photocatalytic sheet, wherein anatase-type titanium oxide particles are baked on the titanium oxide base. 酸化チタンベースが形成された前記チタン箔の一方向に沿って連続する起伏が折曲形成されると共に、その酸化チタンベースにアナターゼ型酸化チタン粒子が焼き付けられた請求項１記載の光触媒シート。   The photocatalyst sheet according to claim 1, wherein continuous undulations are formed along one direction of the titanium foil on which the titanium oxide base is formed, and anatase-type titanium oxide particles are baked on the titanium oxide base. アナターゼ型酸化チタン粒子を担持した光触媒シートの製造方法であって、
チタン箔の片面又は両面から非周期的パターンによるエッチング処理を施して当該チタン箔を表裏を貫通する多数の微細流路が形成された非周期性海綿構造とし、
当該チタン箔に陽極酸化処理を施した後、加熱処理を施してその表面に酸化チタンベースを形成し、
当該酸化チタンベースにアナターゼ型酸化チタン粒子を焼き付けることを特徴とする光触媒シートの製造方法。 A method for producing a photocatalytic sheet carrying anatase-type titanium oxide particles,
A non-periodic sponge structure in which a number of fine flow paths are formed through the front and back of the titanium foil by performing etching treatment with a non-periodic pattern from one side or both sides of the titanium foil,
After anodizing the titanium foil, heat treatment is performed to form a titanium oxide base on the surface,
A method for producing a photocatalytic sheet, wherein anatase-type titanium oxide particles are baked on the titanium oxide base. 前記エッチング処理後、酸化チタンベースにアナターゼ型酸化チタン粒子を焼き付ける前に、当該チタン箔の一方向に沿って連続する起伏を折曲形成した請求項３記載の光触媒シートの製造方法。



The method for producing a photocatalyst sheet according to claim 3, wherein after the etching treatment, before the anatase-type titanium oxide particles are baked on the titanium oxide base, a continuous undulation is formed along one direction of the titanium foil.



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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015047560A (en) * 2013-09-02 2015-03-16 ユーヴィックス株式会社 Photocatalyst sheet
JP2016086790A (en) * 2014-11-11 2016-05-23 ユーヴィックス株式会社 Mosquito catcher using titanium oxide photocatalyst
JP2018004996A (en) * 2016-07-04 2018-01-11 シャープ株式会社 Photocatalyst filer, photocatalyst filter laminate, exhaust unit, and image forming apparatus
JP2018094523A (en) * 2016-12-15 2018-06-21 ユーヴィックス株式会社 Photocatalyst sheet, air cleaning machine and manufacturing method of photocatalyst sheet
JP2018130640A (en) * 2017-02-13 2018-08-23 ユーヴィックス株式会社 Photocatalyst carrier, air cleaner, and photocatalyst carrier manufacturing method
JP2019004886A (en) * 2018-08-01 2019-01-17 ユーヴィックス株式会社 Mosquito catcher using titanium oxide photocatalyst
CN110191757A (en) * 2017-02-13 2019-08-30 盛势达技研株式会社 Photocatalyst-supporting net slice, the manufacturing method of air purifier and photocatalyst-supporting net slice
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10121266A (en) * 1996-08-22 1998-05-12 Takenaka Komuten Co Ltd Metallic material having photocatalytic activity and its production
JP2000140637A (en) * 1998-11-12 2000-05-23 Matsushita Refrig Co Ltd Metallic material having photo-catalytic activity and its preparation
JP2005240139A (en) * 2004-02-27 2005-09-08 Nara Prefecture Method for producing anatase-type titanium oxide film by anodic electrolytic oxidation treatment
JP2006297300A (en) * 2005-04-21 2006-11-02 Nissan Motor Co Ltd Semiconductor photoelectrode, manufacturing method thereof, and light energy conversion device
WO2009152063A2 (en) * 2008-06-10 2009-12-17 Nanoptek Corporation Bandgap-shifted semiconductor surface and apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10121266A (en) * 1996-08-22 1998-05-12 Takenaka Komuten Co Ltd Metallic material having photocatalytic activity and its production
JP2000140637A (en) * 1998-11-12 2000-05-23 Matsushita Refrig Co Ltd Metallic material having photo-catalytic activity and its preparation
JP2005240139A (en) * 2004-02-27 2005-09-08 Nara Prefecture Method for producing anatase-type titanium oxide film by anodic electrolytic oxidation treatment
JP2006297300A (en) * 2005-04-21 2006-11-02 Nissan Motor Co Ltd Semiconductor photoelectrode, manufacturing method thereof, and light energy conversion device
WO2009152063A2 (en) * 2008-06-10 2009-12-17 Nanoptek Corporation Bandgap-shifted semiconductor surface and apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015047560A (en) * 2013-09-02 2015-03-16 ユーヴィックス株式会社 Photocatalyst sheet
JP2016086790A (en) * 2014-11-11 2016-05-23 ユーヴィックス株式会社 Mosquito catcher using titanium oxide photocatalyst
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JP2018094523A (en) * 2016-12-15 2018-06-21 ユーヴィックス株式会社 Photocatalyst sheet, air cleaning machine and manufacturing method of photocatalyst sheet
CN108212156A (en) * 2016-12-15 2018-06-29 优维科斯株式会社 The manufacturing method of photocatalyst sheet, air purifier and photocatalyst sheet
JP2018130640A (en) * 2017-02-13 2018-08-23 ユーヴィックス株式会社 Photocatalyst carrier, air cleaner, and photocatalyst carrier manufacturing method
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JP2019004886A (en) * 2018-08-01 2019-01-17 ユーヴィックス株式会社 Mosquito catcher using titanium oxide photocatalyst
JP2021084082A (en) * 2019-11-28 2021-06-03 ユーヴィックス株式会社 Photocatalyst-carrying sheet as well as air cleaner and water treatment device using the same

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