JP3389187B2 - Film type photocatalyst - Google Patents
Film type photocatalystInfo
- Publication number
- JP3389187B2 JP3389187B2 JP37505999A JP37505999A JP3389187B2 JP 3389187 B2 JP3389187 B2 JP 3389187B2 JP 37505999 A JP37505999 A JP 37505999A JP 37505999 A JP37505999 A JP 37505999A JP 3389187 B2 JP3389187 B2 JP 3389187B2
- Authority
- JP
- Japan
- Prior art keywords
- photocatalyst
- film
- titanium oxide
- type photocatalyst
- present
- 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.)
- Expired - Fee Related
Links
- 239000011941 photocatalyst Substances 0.000 title claims description 42
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 35
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 27
- 239000010936 titanium Substances 0.000 claims description 6
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 239000010410 layer Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 6
- 229910001887 tin oxide Inorganic materials 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 3
- 229940012189 methyl orange Drugs 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000005215 recombination Methods 0.000 description 3
- 230000006798 recombination Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 125000003636 chemical group Chemical group 0.000 description 2
- 238000003618 dip coating Methods 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 230000001699 photocatalysis Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 108010025899 gelatin film Proteins 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- -1 oxygen ions Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Catalysts (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は光触媒に関し、特に
効率の高いフィルム型の光触媒並びにその製造方法に関
する。TECHNICAL FIELD The present invention relates to a photocatalyst, and more particularly to a film type photocatalyst having high efficiency and a method for producing the same.
【０００２】[0002]
【従来の技術】一般に、光触媒とは、光を浴びると表面
の化学的な状態を変化させて化学反応を促進させる触媒
機能を果たす素材をいう。光触媒機能に優れた素材には
酸化チタンＴｉＯ2(Ｔｉｔａｎｉａ)が挙げられる。紫
外線の照射時に酸化チタンの表面に活性高い化学基（Ｏ
Ｈラジカル）を形成されて人体に有害な有機物(ｏｒｇ
ａｎｉｃ ｃｏｍｐｏｕｎｄｓ)を酸化反応によって無
害な安定物質に変化させる作用を行う。2. Description of the Related Art In general, a photocatalyst is a material which has a catalytic function of changing the chemical state of the surface when exposed to light and promoting a chemical reaction. As a material having an excellent photocatalytic function, titanium oxide TiO 2 (Titania) can be mentioned. Chemical groups with high activity (O
H radicals are formed, and organic substances harmful to the human body (org
It acts to transform anic compounds into harmless stable substances by oxidation reaction.
【０００３】以下、このような光触媒の原理を図１を参
照して説明する。アナタゼ(ａｎａｔａｓｅ)結晶構造の
酸化チタンは約３.２ｅＶ程度のバンド・ギャップ・エ
ネルギーを有し、これに相当する光エネルギー(ｐｈｏ
ｔｏｎ−ｈｏｌｅ ｐａｉｒ)が入射すると、電子が伝
導帯に励起されながら電子−正孔対を形成する。この時
に形成された電子及び正孔は図１に示すように表面に吸
着している酸素又は水分とそれぞれ化学反応して酸素イ
オンとＯＨラジカル(ｒａｄｉｃａｌ)を作る。ＯＨラジ
カルは酸化力の強い化学基であり、酸化チタンの表面に
残っている間に有機物に接触するとすぐに酸化して分解
反応を起こす。従って、酸化チタンの光触媒を公害物質
の分解に用いることができる。The principle of such a photocatalyst will be described below with reference to FIG. Titanium oxide having an anatase crystal structure has a band gap energy of about 3.2 eV, which is equivalent to the light energy (pho).
When a ton-hole pair is incident, electrons are excited in the conduction band to form electron-hole pairs. As shown in FIG. 1, the electrons and holes formed at this time chemically react with oxygen or moisture adsorbed on the surface to generate oxygen ions and OH radicals. The OH radical is a chemical group having a strong oxidizing power, and while remaining on the surface of titanium oxide, when it comes into contact with an organic substance, it is immediately oxidized and causes a decomposition reaction. Therefore, the titanium oxide photocatalyst can be used for decomposing pollutants.
【０００４】その時の酸化チタンの光触媒の応用形態に
は次の２つがある。一つは粉末型(ｐｏｗｄｅｒ ｔｙ
ｐｅ)であり、アナタゼ結晶構造の酸化チタン(粒径１０
〜５０ｎｍ）粉末を廃水又は汚染された大気と混合し、
紫外線を照射して浄化反応を起こさせる形態である。し
かし、微細粉末の酸化チタンを回収するために濾過(ｆ
ｉｌｔｅｒｉｎｇ)工程を必要とするという短所があ
る。これは実際の応用に妨げとなる。他の一つはフィル
ム型(ｆｉｌｍ ｔｙｐｅ)である。粉末型と同様にアナ
タゼ結晶構造の酸化チタンを合成してガラス、金属など
の支持体の表面にコーティングしてフィルム化した後、
廃水又は汚染された大気に接触可能に設けて紫外線を照
射することで浄化処理を行う。このフィルム型は、基板
に酸化チタンが固定されているため濾過工程が必要な
い。しかし、表面積が小さいため粉末型よりも効率が一
層低いという短所がある。There are the following two forms of application of the titanium oxide photocatalyst at that time. One is powder type
pe) and titanium oxide of anatase crystal structure (particle size 10
~ 50 nm) powder mixed with wastewater or contaminated air,
It is a form that irradiates ultraviolet rays to cause a purification reaction. However, in order to recover fine powder of titanium oxide, filtration (f
It has the disadvantage of requiring an iltering process. This hinders practical applications. The other one is a film type. After synthesizing titanium oxide with anatase crystal structure similar to the powder type and coating it on the surface of a support such as glass or metal to form a film,
Purification is performed by irradiating with ultraviolet rays so that waste water or contaminated air can be contacted. This film type does not require a filtration step because titanium oxide is fixed on the substrate. However, it has a disadvantage of being less efficient than the powder type because of its small surface area.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記の問題点
を解決するためのものであり、その目的は効率の高いフ
ィルム型の光触媒並びにその製造方法を提供することに
ある。SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, and an object thereof is to provide a film type photocatalyst having high efficiency and a method for producing the same.
【０００６】[0006]
【課題を解決するための手段】本発明のフィルム型の光
触媒は、表面に酸化チタンＴｉＯ 2 層がコーティングさ
れたチタンＴｉからなるワイヤで形成された少なくとも
一対のメッシュ（ｍｅｓｈ）と、ワイヤの一定領域に形
成される入力端子部と、入力端子部を介してワイヤにパ
ルス状の電圧を印加する電源部とから構成される。ここ
で、電源部は、パルス状の電圧を＋，−に切り換えるよ
うにしてもよい。又、ワイヤの入力端子部の形成された
領域は酸化チタンでコーティングされていないものであ
ってもよい。The film-type photocatalyst of the present invention has a surface coated with a titanium oxide TiO 2 layer.
At least a wire made of titanium Ti
A pair of mesh (mesh), and the input terminal portion formed in a predetermined region of the wire, Pa to the wire through the input terminal portion
It is composed of a power supply unit for applying a loose voltage. Here, the power supply unit switches the pulsed voltage between + and-.
You may ask . Also, the input terminal of the wire is formed
The area is not coated with titanium oxide
You may .
【０００７】本発明のフィルム型の光触媒は、紫外線に
より励起された電子と正孔とが互いに再結合されずに分
離されて化学作用に寄与するので、処理効率が従来に比
べて２倍以上向上し、広範囲な応用が可能である。In the film-type photocatalyst of the present invention, electrons and holes excited by ultraviolet rays are separated from each other without being recombined and contribute to the chemical action, so that the treatment efficiency is more than doubled as compared with the conventional case. However, a wide range of applications are possible.
【０００８】[0008]
【発明の実施の形態】以下、本発明のフィルム型の光触
媒並びのその製造方法を添付図面を参照して説明する。
図２は本発明に関連する参考例によるフィルム型の光触
媒の構造を示す図である。本発明に関連する参考例にか
かるフィルム型の光触媒は、図２に示すように、ガラ
ス、金属、セラミックス等の基板上に酸化錫ＳｎＯ2コ
ーティング層を形成し、その上に酸化チタンＴｉＯ2コ
ーティング層を形成した２層構造を有する。このような
２層構造の光触媒は、図３に示すように、入射光により
励起された電子−正孔対を酸化錫と酸化チタンとのエネ
ルギー準位差で分離して、正孔が化学反応に関与する確
率を高めることができる。従って、光触媒の効率を約２
倍以上向上させることができる。BEST MODE FOR CARRYING OUT THE INVENTION A method for producing a film-type photocatalyst array according to the present invention will be described below with reference to the accompanying drawings.
FIG. 2 is a view showing a structure of a film type photocatalyst according to a reference example related to the present invention. As shown in FIG. 2, a film type photocatalyst according to a reference example related to the present invention has a tin oxide SnO 2 coating layer formed on a substrate of glass, metal, ceramics, etc., and a titanium oxide TiO 2 coating layer formed thereon. It has a two-layer structure in which layers are formed. Such a
As shown in FIG. 3, the photocatalyst having a two- layer structure separates an electron-hole pair excited by incident light by an energy level difference between tin oxide and titanium oxide, and the hole participates in a chemical reaction. The probability can be increased. Therefore, the efficiency of the photocatalyst is about 2
It can be more than doubled.
【０００９】以下、図４を参照して２層構造のフィルム
型の光触媒の製造方法を説明する。まず、光触媒をコー
ティングしようとするガラス、金属、セラミッククス等
の支持体又は基板を、アルコール、アセトン、脱イオン
水等で洗浄する。次いで、ディップ・コーティングに適
切なように製造された酸化錫ゾル(ｓｏｌ)溶液を用いて
コーティングした後、大気中で常温乾燥させる。この
際、酸化錫ゾル溶液は、コーティングの直後には液状の
膜になるが、常温乾燥により固体状態のゲル(ｇｅｌ)フ
ィルムになる。この酸化錫コーティング層上に、ディッ
プコーティングに適切な酸化チタンゾル溶液をコーティ
ングして乾燥させる。この後、ゲル状態の２層構造のコ
ーティング層を電気炉又はオーブンで約１００〜５００
℃で熱処理すると、酸化物の結晶質コーティング膜を得
られる。この際、熱処理の温度が５００℃以上では、膜
の粘着力や透明性等の物理的な性質が改善できるが、酸
化チタンの結晶構造がアナタゼからルチル(ｒｕｔｉｌ
ｅ)構造へ転移して光触媒特性が低くなるため注意すべ
きである。A method of manufacturing a film type photocatalyst having a two- layer structure will be described below with reference to FIG. First, the support or substrate such as glass, metal, ceramics, etc. to be coated with the photocatalyst is washed with alcohol, acetone, deionized water or the like. Then, a tin oxide sol solution prepared as appropriate for dip coating is used for coating, and then dried in air at room temperature. At this time, the tin oxide sol solution becomes a liquid film immediately after coating, but becomes a solid gel film by drying at room temperature. The tin oxide coating layer is coated with a titanium oxide sol solution suitable for dip coating and dried. Then, the coating layer having a two-layer structure in a gel state is heated to about 100 to 500 in an electric furnace or an oven.
A heat treatment at ℃ gives a crystalline oxide coating film. At this time, when the temperature of the heat treatment is 500 ° C. or higher, physical properties such as adhesive strength and transparency of the film can be improved, but the crystal structure of titanium oxide changes from anatase to rutile.
e) It should be noted that the photocatalytic property is lowered due to the transition to the structure.
【００１０】図５は、上述のようにして製造された２層
構造の光触媒の分解反応測定結果を示すグラフである。
染色廃水の一種のメチルオレンジ(ｍｅｔｈｙｌ ｏｒ
ａｎｇｅ)の分解反応で評価した結果、酸化チタン１層
のみコーティングした光触媒よりも２層構造の酸化錫−
酸化チタンコーティング膜の分解反応速度が著しく向上
することが分かる。FIG. 5 is a graph showing the measurement results of the decomposition reaction of the photocatalyst having the two- layer structure manufactured as described above.
A kind of dyeing wastewater, methyl orange
As a result of the evaluation by the decomposition reaction of the (age), the tin oxide having a two-layer structure is better than the photocatalyst coated with only one layer of titanium oxide.
It can be seen that the decomposition reaction rate of the titanium oxide coating film is significantly improved.
【００１１】図６は本発明の一実施の形態にかかる光触
媒の構造を示す図で、図７はメッシュ状の光触媒を示す
図である。図６に示すように金属ワイヤ又はプレート
(ｐｌａｔｅ)の表面に酸化チタンＴｉＯ2をコーティン
グし、図７に示すように酸化チタンのコーティングされ
た金属ワイヤをメッシュ状に加工した後、酸化チタンの
コーティングされていない金属ワイヤの端部に電源を接
続して光触媒を制作する。FIG. 6 is a diagram showing the structure of a photocatalyst according to an embodiment of the present invention, and FIG. 7 is a diagram showing a mesh-shaped photocatalyst. Metal wire or plate as shown in FIG.
Titanium oxide TiO 2 is coated on the surface of the (plate), the metal wire coated with titanium oxide is processed into a mesh shape as shown in FIG. 7, and the power supply is applied to the end of the metal wire not coated with titanium oxide. To produce a photocatalyst.
【００１２】このように制作された光触媒の動作原理は
次の通りである。まず、外部の電源より光触媒の金属ワ
イヤに電場を加えてやる。すると、紫外線によって酸化
チタンの内部で生成された電子と正孔が互いに反対方向
に誘導され、電子と正孔間の再結合が抑制される。この
再結合の抑制された電子と正孔はそれぞれ化学反応に寄
与するので、効率が向上する。もし、紫外線により励起
された電子と正孔が化学反応に関与することなく直ちに
再結合すればするほど光触媒の効率が低くなる。すなわ
ち、光触媒の酸化チタンコーティング膜の両端に電場が
形成されると、電子と正孔とが互いに反対方向に移動し
ようとする力が発生して電子と正孔との再結合が抑制さ
れるので、生成された電子及び正孔が化学反応に寄与す
る程度が高くなる。ここで光触媒に加える電圧は＋、−
をパルス状に変えた電圧である。電圧の＋、−をパルス
状に変えてやることにより、反応を一方だけで起こすこ
とを防ぐことができる。したがって、化学的な平衡状態
を誘導することができ、光触媒反応の安定性を高めるこ
とができる。The operation principle of the photocatalyst manufactured as described above is as follows. First, an electric field is applied to the metal wire of the photocatalyst from an external power source. Then, the electrons and holes generated inside the titanium oxide by the ultraviolet rays are induced in opposite directions, and recombination between the electrons and holes is suppressed. The electrons and holes in which the recombination is suppressed respectively contribute to the chemical reaction, so that the efficiency is improved. If the electrons and holes excited by ultraviolet rays recombine immediately without participating in the chemical reaction, the efficiency of the photocatalyst becomes lower. That is, when an electric field is formed at both ends of the titanium oxide coating film of the photocatalyst, a force that causes electrons and holes to move in opposite directions is generated, and recombination of electrons and holes is suppressed. The degree to which the generated electrons and holes contribute to the chemical reaction increases. Here, the voltage applied to the photocatalyst is +,-
Is a voltage obtained by changing the pulse shape. By changing the voltage + and-into a pulse shape, it is possible to prevent the reaction from occurring in only one side. Therefore, a chemical equilibrium state can be induced and the stability of the photocatalytic reaction can be enhanced.
【００１３】一方、本発明の酸化チタンコーティング膜
は、チタンＴｉ金属を空気又は酸素雰囲気中で約４００
〜８００℃範囲の温度で約３０分〜５時間程度酸化させ
ることで容易く得ることができるが、できるだけアナタ
ゼ(ａｎａｔａｓｅ)結晶構造が多く現れるように低温で
長時間にわたって処理した方がよい。酸化チタンコーテ
ィング膜の形成は熱による酸化の外、ゾル−ゲル(ｓｏ
ｌ−ｇｅｌ)工程又はその他の方法でも可能である。ゾ
ル−ゲル工程を用いる際は、チタン−アルコキサイド
(Ｔｉ−Ａｌｋｏｘｉｄｅ)類の試薬をアルコール溶液に
適当な濃度で溶解させた後、安定した分散状態を維持す
るようにｐＨを調節してコーティング溶液を作り、ここ
にＴｉワイヤ又はメッシュをディッピングして乾燥、熱
処理すればよい。ここで、熱処理の温度は約２００〜５
００℃であり、維持時間は１０分乃至１時間程度がよ
い。更に、酸化チタンのコーティング膜の厚さは１．０
μｍ前後が適当である。On the other hand, the titanium oxide coating film of the present invention comprises titanium Ti metal of about 400 in air or oxygen atmosphere.
It can be easily obtained by oxidation at a temperature in the range of up to 800 ° C. for about 30 minutes to 5 hours, but it is better to treat at a low temperature for a long time so that as many anatase crystal structures as possible appear. Titanium oxide coating film is formed by sol-gel (so-gel) as well as thermal oxidation.
1-gel) step or other methods. When using the sol-gel process, titanium-alkoxide
After dissolving (Ti-Alkoxide) type reagents in an alcohol solution at an appropriate concentration, the pH is adjusted so as to maintain a stable dispersion state to prepare a coating solution, and a Ti wire or mesh is dipped therein. It may be dried and heat treated. Here, the temperature of the heat treatment is about 200 to 5
The temperature is 00 ° C., and the maintenance time is preferably 10 minutes to 1 hour. Furthermore, the thickness of the titanium oxide coating film is 1.0.
Around μm is appropriate.
【００１４】図８は本発明によるメッシュ構造の光触媒
の特性を示すグラフであり、染色廃水の一種のメチルオ
レンジの分解反応結果を示している。図８に示すよう
に、本発明のメッシュ構造の光触媒に電圧を印加しなか
った場合には、メチルオレンジの分解反応速度が非常に
遅く、あまり分解されない。しかし、電圧を印加した場
合には、分解反応速度が速くなり、よく分解される。FIG. 8 is a graph showing the characteristics of the photocatalyst having a mesh structure according to the present invention, showing the result of the decomposition reaction of methyl orange, a kind of dyeing wastewater. As shown in FIG. 8, when no voltage was applied to the mesh-structured photocatalyst of the present invention, the decomposition reaction rate of methyl orange was very slow and the decomposition was not so much. However, when a voltage is applied, the decomposition reaction rate increases and the decomposition is good.
【００１５】[0015]
【発明の効果】本発明によるフィルム型の光触媒におい
ては次のような効果がある。本発明のフィルム型の光触
媒は、紫外線により励起された電子と正孔とが互いに再
結合されずに分離されて化学作用に寄与するので、処理
効率が従来に比べて約２倍以上向上する。更に、広範囲
に応用可能である。本発明は本発明の技術的思想を脱し
ない範囲内で当業者によって変更及び修正可能である。
本発明の技術的な範囲は実施の形態に記載の内容に限定
されず、特許請求の範囲により決定される。It has the following effect of the light-catalysts in at <br/> film type according to the invention, according to the present invention. In the film-type photocatalyst of the present invention, electrons and holes excited by ultraviolet rays are not recombined with each other but are separated from each other and contribute to a chemical action, so that the treatment efficiency is improved about twice or more as compared with the conventional case. Further, it can be applied to a wide range. The present invention can be changed and modified by those skilled in the art without departing from the technical idea of the present invention.
The technical scope of the present invention is not limited to the contents described in the embodiments, but is determined by the claims.
【図１】一般的な光触媒の動作原理を示す図である。FIG. 1 is a diagram showing an operating principle of a general photocatalyst.
【図２】本発明に関連する参考例によるフィルム型の光
触媒の構造を示す図である。FIG. 2 is a view showing a structure of a film type photocatalyst according to a reference example related to the present invention.
【図３】本発明に関連する参考例のフィルム型の光触媒
における電荷分離現象による効率の向上を示す図であ
る。FIG. 3 is a diagram showing an improvement in efficiency due to a charge separation phenomenon in a film type photocatalyst of a reference example related to the present invention.
【図４】本発明に関連する参考例によるフィルム型の光
触媒の製造工程を示す流れ図である。FIG. 4 is a flowchart showing a manufacturing process of a film type photocatalyst according to a reference example related to the present invention.
【図５】本発明に関連する参考例によるフィルム型の光
触媒の分解反応測定結果を示す図である。FIG. 5 is a diagram showing a measurement result of a decomposition reaction of a film-type photocatalyst according to a reference example related to the present invention.
【図６】本発明の一実施の形態によるフィルム型の光触
媒の構造を示す図である。FIG. 6 is a diagram showing the structure of a film-type photocatalyst according to an embodiment of the present invention.
【図７】本発明の一実施の形態によるメッシュ状の光触
媒を示す図。7 is a diagram showing a mesh of a photocatalyst according to an embodiment of the present invention.
【図８】本発明の一実施の形態によるフィルム型の光触
媒の分解反応測定結果を示す図である。FIG. 8 is a diagram showing a measurement result of a decomposition reaction of a film type photocatalyst according to an embodiment of the present invention.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−305922（ＪＰ，Ａ) 特開 平１−143630（ＪＰ，Ａ) 特開 平10−130887（ＪＰ，Ａ) 特開 平10−57838（ＪＰ，Ａ) 特開2000−51712（ＪＰ，Ａ) 特開2000−33270（ＪＰ，Ａ) 特開 平11−333451（ＪＰ，Ａ) 特開 平11−333303（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01J 21/00 - 38/74 ─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-63-305922 (JP, A) JP-A-1-143630 (JP, A) JP-A-10-130887 (JP, A) JP-A-10- 57838 (JP, A) JP 2000-51712 (JP, A) JP 2000-33270 (JP, A) JP 11-333451 (JP, A) JP 11-333303 (JP, A) (58 ) Fields surveyed (Int.Cl. 7 , DB name) B01J 21/00-38/74
Claims (3)
ングされたチタンＴｉからなるワイヤで形成された少な
くとも一対のメッシュと、前記ワイヤの一定領域に形成される入力端子部と、 前記入力端子部を介して前記ワイヤにパルス状の電圧を
印加する電源部 とを備えることを特徴とするフィルム型
の光触媒。1. A titanium oxide TiO 2 layer is coated on the surface.
Less formed by a wire made of a ring titanium Ti
At least a pair of meshes , an input terminal portion formed in a certain area of the wire, and a pulsed voltage to the wire via the input terminal portion.
A film-type photocatalyst, comprising: a power supply unit for applying a voltage .
＋，−に切り換えることを特徴とする請求項１記載のフ
ィルム型の光触媒。2. The power supply unit supplies the pulsed voltage.
The film type photocatalyst according to claim 1, wherein the film type photocatalyst is switched between + and- .
た領域は前記酸化チタンでコーティングされていないこ
とを特徴とする請求項１または２記載のフィルム型の光
触媒。 3. A formed of the input terminal portion of the wire
The film-type photocatalyst according to claim 1 or 2 , characterized in that said region is not coated with said titanium oxide .
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR62819/1998 | 1998-12-31 | ||
| KR1019980062819A KR20000046142A (en) | 1998-12-31 | 1998-12-31 | Film type photo-catalyst and preparation thereof |
| KR4890/1999 | 1999-02-11 | ||
| KR1019990004890A KR20000055960A (en) | 1999-02-11 | 1999-02-11 | High efficiency photocatalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000202302A JP2000202302A (en) | 2000-07-25 |
| JP3389187B2 true JP3389187B2 (en) | 2003-03-24 |
Family
ID=26634527
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP37505999A Expired - Fee Related JP3389187B2 (en) | 1998-12-31 | 1999-12-28 | Film type photocatalyst |
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| JP (1) | JP3389187B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0419629D0 (en) * | 2004-09-03 | 2004-10-06 | Univ Newcastle | Electrochemical device |
| SE533427C2 (en) * | 2008-09-04 | 2010-09-21 | Wallenius Water Ab | catalysts |
| CN102400138B (en) * | 2010-09-15 | 2015-07-08 | 鸿富锦精密工业（深圳）有限公司 | Film plating member and its manufacturing method |
| CN102806077A (en) * | 2012-08-22 | 2012-12-05 | 镇江忆诺唯记忆合金有限公司 | Photocatalysis and degradation performance compound type photocatalyst |
| CN106076311B (en) * | 2016-06-29 | 2019-05-10 | 渤海大学 | A kind of preparation method of titanium dioxide/stannic oxide complex oxide ultrafine nano particle |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63305922A (en) * | 1987-06-05 | 1988-12-13 | Ebara Res Co Ltd | Method for treating waste ozone |
| JPH01143630A (en) * | 1987-11-27 | 1989-06-06 | Ebara Res Co Ltd | Method for treating fluorocarbon |
| JP3446985B2 (en) * | 1996-08-14 | 2003-09-16 | 株式会社荏原製作所 | Gas cleaning method and apparatus |
| JPH10130887A (en) * | 1996-09-04 | 1998-05-19 | Nikon Corp | Production of porous titanium oxide film, porous titanium oxide film and photocatalyst for decomposing gaseous nox |
| JP2000033270A (en) * | 1998-07-17 | 2000-02-02 | Hitachi Metals Ltd | Photocatalytic body |
| JP4125819B2 (en) * | 1998-05-28 | 2008-07-30 | 日立金属株式会社 | Photocatalyst |
| JP2000051712A (en) * | 1998-08-13 | 2000-02-22 | Hitachi Metals Ltd | Photocatalyst body |
| JP3018034B2 (en) * | 1998-05-28 | 2000-03-13 | ライザー工業株式会社 | Ultraviolet sterilization and purification method and device |
-
1999
- 1999-12-28 JP JP37505999A patent/JP3389187B2/en not_active Expired - Fee Related
Also Published As
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| JP2000202302A (en) | 2000-07-25 |
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