JP2005279534A - Photocatalyst carrying body - Google Patents

Photocatalyst carrying body Download PDF

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JP2005279534A
JP2005279534A JP2004099661A JP2004099661A JP2005279534A JP 2005279534 A JP2005279534 A JP 2005279534A JP 2004099661 A JP2004099661 A JP 2004099661A JP 2004099661 A JP2004099661 A JP 2004099661A JP 2005279534 A JP2005279534 A JP 2005279534A
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photocatalyst
granular material
light
granular
held
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Akio Mukai
昭雄 向井
Akihiro Kato
陽弘 加藤
Toshimichi Nakamura
利道 中村
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Okaya Electric Industry Co Ltd
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Okaya Electric Industry Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To realize a photocatalyst carrying body which is provided with many granular bodies each holding a photocatalyst and a reticular member for covering the granular bodies and has excellent efficiency when the photocatalyst is irradiated with light. <P>SOLUTION: This photocatalyst carrying body 10 is constituted so that the photocatalyst 14 consisting of anatase type titanium dioxide (TiO<SB>2</SB>) etc. is held on the granular body 12 consisting of silica gel being a light-transmissive porous adsorbing material and also held in a reticular container 18 being the reticular member having many communicative holes 16 and many granular bodies 12 are housed in the reticular container 18. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、光触媒を保持して成る多数の粒状体と、これら粒状体を被覆する網状部材とを備えた光触媒担持体に関する。   The present invention relates to a photocatalyst carrier comprising a large number of granular materials that hold a photocatalyst and a net-like member that covers these granular materials.

酸化チタン（ＴｉＯ２）等の光触媒は、紫外線等の光の照射を受けると活性化して強力な酸化還元作用を生じ、窒素酸化物（ＮＯＸ）、硫黄酸化物（ＳＯＸ）等の有害化合物や汚濁物等を効果的に分解する作用を発揮するものであることから、この光触媒を担持させて成る光触媒担持体を用いて空気や水の浄化を行う試みが成されている。 Photocatalysts such as titanium oxide (TiO 2 ) are activated when irradiated with light such as ultraviolet rays to produce a strong redox effect, and harmful compounds such as nitrogen oxides (NO X ) and sulfur oxides (SO X ) Attempts have been made to purify air and water using a photocatalyst carrier that carries this photocatalyst.

図９は、従来の光触媒担持体の一例を示すものであり、この光触媒担持体70は、セラミック等より成る球形の粒状体72の表面に光触媒74を被着・保持させると共に、多数の粒状体72を、連通孔76を多数備えた網状容器78内に収納して構成したものである。   FIG. 9 shows an example of a conventional photocatalyst carrier, and this photocatalyst carrier 70 deposits and holds the photocatalyst 74 on the surface of a spherical granule 72 made of ceramic or the like, and a number of granules. 72 is configured to be housed in a mesh container 78 having a large number of communication holes 76.

上記光触媒担持体70における粒状体72表面の光触媒74に、図示しない外部の光源からの紫外線等の光触媒活性化作用を有する波長の光が照射されると、光触媒74が活性化して該光触媒74表面に接触した空気や水の浄化を行うことができるのである。
上記光触媒担持体70は、光触媒74を保持した多数の粒状体72を網状容器78内に収納しているため、持ち運び作業や設置作業が容易となっている。 When the photocatalyst 74 on the surface of the granular material 72 in the photocatalyst carrier 70 is irradiated with light having a wavelength having a photocatalytic activation effect such as ultraviolet rays from an external light source (not shown), the photocatalyst 74 is activated and the surface of the photocatalyst 74 is activated. It is possible to purify the air and water in contact with the water.
In the photocatalyst carrier 70, a large number of granular bodies 72 holding the photocatalyst 74 are accommodated in the mesh container 78, so that the carrying work and the setting work are easy.

上記光触媒担持体70の網状容器78には、多数の連通孔76が形成されているため、光触媒活性化作用を有する波長の光は上記連通孔76を通過して粒状体72表面の光触媒74に照射されるようになっている。
しかしながら、上記光触媒担持体70にあっては、光の一部が網状容器78で遮られてしまって光触媒74へ照射することができないことから、光触媒74への光の照射効率が不十分であった。 Since a large number of communication holes 76 are formed in the mesh container 78 of the photocatalyst carrier 70, light having a wavelength having a photocatalytic activation action passes through the communication holes 76 to the photocatalyst 74 on the surface of the granular material 72. Irradiated.
However, in the photocatalyst carrier 70, since a part of the light is blocked by the mesh container 78 and cannot be irradiated to the photocatalyst 74, the light irradiation efficiency to the photocatalyst 74 is insufficient. It was.

本発明は、上記要請に応えるためになされたものであり、その目的とするところは、光触媒を保持して成る多数の粒状体と、これら粒状体を被覆する網状部材とを備えた光触媒担持体において、光触媒への光の照射効率が良好な光触媒担持体の実現にある。   The present invention has been made to meet the above-mentioned demands, and the object of the present invention is to provide a photocatalyst carrier comprising a large number of granular materials that hold a photocatalyst and a net-like member that covers these granular materials. The present invention is to realize a photocatalyst carrier having good light irradiation efficiency to the photocatalyst.

上記の目的を達成するため、本発明に係る光触媒担持体は、光触媒を保持して成る多数の粒状体を、多数の連通孔を備えた網状部材で被覆すると共に、上記網状部材に光触媒を保持せしめたことを特徴とする。   In order to achieve the above object, the photocatalyst carrier according to the present invention covers a large number of granular materials each holding a photocatalyst with a net-like member having a large number of communicating holes, and holds the photocatalyst on the net-like member. It is characterized by being damped.

上記粒状体をシリカゲル又は多孔質ガラス等の透光性の多孔質吸着材で構成し、該多孔質吸着材で構成された粒状体の表面及び細孔内に光触媒を保持せしめるのが好ましい。   It is preferable that the granular material is composed of a light-transmitting porous adsorbent such as silica gel or porous glass, and the photocatalyst is held on the surface and pores of the granular material composed of the porous adsorbent.

本発明の光触媒担持体にあっては、粒状体だけでなく、粒状体を被覆する網状部材にも光触媒を保持せしめたことから、光触媒担持体に照射された光を無駄なく光触媒へ照射することができ、光触媒への光の照射効率が良好である。   In the photocatalyst carrier of the present invention, since the photocatalyst is held not only in the granular body but also in the mesh member covering the granular body, the light irradiated on the photocatalyst carrier can be irradiated to the photocatalyst without waste. And the light irradiation efficiency to the photocatalyst is good.

上記粒状体を、シリカゲル又は多孔質ガラス等の比表面積が極めて大きい透光性の多孔質吸着材で構成し、該多孔質吸着材で構成された粒状体の表面及び細孔内に光触媒を保持せしめた場合には、粒状体に保持させる光触媒の表面積を大きく確保することができる。   The granular material is composed of a light-transmitting porous adsorbent having a very large specific surface area such as silica gel or porous glass, and the photocatalyst is held on the surface and pores of the granular material composed of the porous adsorbent. When caulking, it is possible to ensure a large surface area of the photocatalyst held by the granular material.

以下、図面に基づき、本発明に係る光触媒担持体の実施形態を説明する。
図１乃至図３は、本発明に係る第１の光触媒担持体10を示すものであり、該第１の光触媒担持体10は、透光性の多孔質吸着材であるシリカゲルより成る粒状体12に、アナターゼ型の酸化チタン（ＴｉＯ２）等より成る光触媒14（図３）を保持させると共に、多数の連通孔16を備えた網状部材としての網状容器18にも光触媒14（図３）を保持させ、さらに、上記網状容器18内に多数の上記粒状体12を収納して構成したものである。 Hereinafter, an embodiment of a photocatalyst carrier according to the present invention will be described with reference to the drawings.
FIGS. 1 to 3 show a first photocatalyst carrier 10 according to the present invention. The first photocatalyst carrier 10 is a granular material 12 made of silica gel, which is a translucent porous adsorbent. In addition, a photocatalyst 14 (FIG. 3) made of anatase-type titanium oxide (TiO 2 ) or the like is held, and a photocatalyst 14 (FIG. 3) is also held in a net-like container 18 as a net-like member having a large number of communication holes 16. Further, a large number of the granular materials 12 are accommodated in the mesh container 18.

上記光触媒14は、紫外線の照射を受けて活性化する光触媒だけでなく、可視光の照射を受けて活性化する可視光型光触媒を用いることもできる。
上記光触媒14としては、上記の酸化チタン以外に、ＺｎＯ、ＳｒＴｉＯ３、ＢａＴｉＯ３、Ｆｅ２Ｏ３等、光触媒作用を有する他の金属酸化物を用いることができるが、アナターゼ型の酸化チタンが、光触媒活性に優れており最も好適に使用できる。 As the photocatalyst 14, not only a photocatalyst activated by irradiation with ultraviolet rays but also a visible light photocatalyst activated by irradiation with visible light can be used.
As the photocatalyst 14, in addition to the above titanium oxide, other metal oxides having a photocatalytic action such as ZnO, SrTiO 3 , BaTiO 3 , Fe 2 O 3 and the like can be used. It is excellent in photocatalytic activity and can be most suitably used.

透光性の多孔質吸着材であるシリカゲルで構成された上記粒状体12は、径が１０ｎｍ〜５０ｎｍ程度の細孔を多数有する直径０．１ｍｍ〜５ｍｍ程度の球形と成されており、細孔の比表面積は５０ｍ２／ｇ〜３００ｍ２／ｇ程度と極めて大きいものである。光触媒14は、シリカゲルで構成された粒状体12の表面のみならず、細孔内にも吸着保持されている。
上記シリカゲルで構成された粒状体12の表面及び細孔内に光触媒14を保持させるには、例えば、粒径が粒状体12の細孔径より小さい光触媒微粒子の分散液中に、粒状体12を浸漬した後、乾燥・焼成させることにより行うことができる。 The granular material 12 composed of silica gel, which is a light-transmitting porous adsorbent, has a spherical shape with a diameter of about 0.1 mm to 5 mm having a large number of pores with a diameter of about 10 nm to 50 nm. the specific surface area of which is extremely large as 50m 2 / g~300m 2 / g approximately. The photocatalyst 14 is adsorbed and held not only on the surface of the granular material 12 made of silica gel but also in the pores.
In order to hold the photocatalyst 14 on the surface and pores of the granular material 12 composed of the silica gel, for example, the granular material 12 is immersed in a dispersion of photocatalyst fine particles whose particle diameter is smaller than the pore diameter of the granular material 12. Then, it can be performed by drying and firing.

上記網状容器18は、金属や樹脂等の適宜な材料で構成されており、該網状容器18の表面に、光触媒14が被着・保持されている。   The mesh container 18 is made of an appropriate material such as metal or resin, and the photocatalyst 14 is attached to and held on the surface of the mesh container 18.

上記第１の光触媒担持体10に、図示しない外部の光源からの紫外線等の光触媒活性化作用を有する波長の光が照射されると、粒状体12の表面及び細孔内に保持された光触媒14、及び、網状容器18の表面に保持された光触媒14が活性化して該光触媒14の表面に接触した空気や水の浄化を行うことができるのである。
尚、シリカゲルで構成された粒状体12は、透光性を有していることから、粒状体12の細孔内に保持した光触媒14にも光を十分に照射することが可能である。また、多数の細孔を有する粒状体12は、通気性、通水性に優れていることから、光触媒14と空気や水との接触効率が良好である。
而して、上記第１の光触媒担持体10にあっては、粒状体12だけでなく、粒状体12を収納する網状容器18にも光触媒14を保持せしめたことから、第１の光触媒担持体10に照射された光を無駄なく光触媒14へ照射することができ、光触媒14への光の照射効率が良好である。
また、上記粒状体12を、比表面積が極めて大きい多孔質吸着材であるシリカゲルで構成し、該シリカゲルで構成された粒状体12の表面及び細孔内に光触媒14を保持せしめているので、粒状体12に保持させる光触媒14の表面積を大きく確保することができる。 When the first photocatalyst carrier 10 is irradiated with light having a photocatalytic activation effect such as ultraviolet rays from an external light source (not shown), the photocatalyst 14 held on the surface of the granular material 12 and in the pores. In addition, the photocatalyst 14 held on the surface of the net-like container 18 is activated, and the air or water that has contacted the surface of the photocatalyst 14 can be purified.
Since the granular material 12 made of silica gel has translucency, the photocatalyst 14 held in the pores of the granular material 12 can be sufficiently irradiated with light. Further, since the granular material 12 having a large number of pores is excellent in air permeability and water permeability, the contact efficiency between the photocatalyst 14 and air or water is good.
Thus, in the first photocatalyst carrier 10, since the photocatalyst 14 is held not only in the granular body 12 but also in the net-like container 18 that stores the granular body 12, the first photocatalyst carrier body. The light irradiated to 10 can be irradiated to the photocatalyst 14 without waste, and the light irradiation efficiency to the photocatalyst 14 is good.
Further, the granular material 12 is composed of silica gel, which is a porous adsorbent having a very large specific surface area, and the photocatalyst 14 is held in the surface and pores of the granular material 12 composed of the silica gel. A large surface area of the photocatalyst 14 held by the body 12 can be secured.

図４は、第１の光触媒担持体10の変形例を示すものであり、この第１の光触媒担持体10の変形例は、多数の粒状体12と共に複数の球状の反射材20を、上記網状容器18内に収納して構成したものである。
上記反射材20は、アルミニウム等の光反射率の高い材料で構成することができる。また、表面が光反射率の高い白色と成された部材で反射材20を構成しても良い。
このように、粒状体12と共に反射材20を網状容器18内に収納することにより、光触媒14を活性化させる光を様々な方向に反射させて光触媒14への照射効率を向上させることができる。 FIG. 4 shows a modified example of the first photocatalyst carrier 10, and this modified example of the first photocatalyst carrier 10 includes a plurality of granular reflectors 12 and a plurality of spherical reflectors 20. It is configured to be housed in the container 18.
The reflector 20 can be made of a material having a high light reflectance such as aluminum. Further, the reflecting material 20 may be formed of a member whose surface is white with high light reflectance.
Thus, by storing the reflecting material 20 in the mesh container 18 together with the granular material 12, the light for activating the photocatalyst 14 can be reflected in various directions, and the irradiation efficiency to the photocatalyst 14 can be improved.

図５乃至図７は、本発明に係る第２の光触媒担持体22を示すものであり、該第２の光触媒担持体22は、ガラス、樹脂、金属等の適宜な材料より成る平板状の基体24の表面に、多数の上記粒状体12を配置すると共に、これら粒状体12を、金属や樹脂等より成り、多数の連通孔26を備えた網状部材28で被覆して成る。さらに、上記第１の光触媒担持体10と同様に、網状部材28の表面には、光触媒14が保持されている。
上記第２の光触媒担持体22に、図示しない外部の光源からの紫外線等の光触媒活性化作用を有する波長の光が照射されると、粒状体12の表面及び細孔内に保持された光触媒14、及び、網状部材28の表面に保持された光触媒14が活性化して該光触媒14の表面に接触した空気や水の浄化を行うことができるのである。
この第２の光触媒担持体22にあっても、上記第１の光触媒担持体14と同様に、粒状体12だけでなく、粒状体12を被覆する網状部材28にも光触媒14を保持せしめたことから、第１の光触媒担持体10に照射された光を無駄なく光触媒14へ照射することができ、光触媒14への光の照射効率が良好である。 5 to 7 show a second photocatalyst carrier 22 according to the present invention, and the second photocatalyst carrier 22 is a flat substrate made of an appropriate material such as glass, resin, metal or the like. A large number of the granular materials 12 are arranged on the surface of 24, and these granular materials 12 are made of metal, resin, or the like and covered with a net-like member 28 provided with a large number of communication holes 26. Further, as with the first photocatalyst carrier 10, the photocatalyst 14 is held on the surface of the mesh member 28.
When the second photocatalyst carrier 22 is irradiated with light having a wavelength having a photocatalytic activation effect such as ultraviolet rays from an external light source (not shown), the photocatalyst 14 held on the surface of the granular material 12 and in the pores. In addition, the photocatalyst 14 held on the surface of the mesh member 28 is activated, and the air or water that contacts the surface of the photocatalyst 14 can be purified.
Even in the second photocatalyst carrier 22, the photocatalyst 14 was held not only in the granular body 12 but also in the mesh member 28 covering the granular body 12, as in the first photocatalyst carrier 14. Thus, the light irradiated to the first photocatalyst carrier 10 can be irradiated to the photocatalyst 14 without waste, and the light irradiation efficiency to the photocatalyst 14 is good.

図８は、第２の光触媒担持体22の変形例を示すものであり、この第２の光触媒担持体22の変形例は、多数の粒状体12と共に複数の上記反射材20を、基体24の表面に配置すると共に、これら粒状体12及び反射材20を上記網状部材28で被覆して構成したものである。
このように、粒状体12と共に反射材20を配置することにより、光触媒14を活性化させる光を様々な方向に反射させて光触媒14への照射効率を向上させることができる。 FIG. 8 shows a modified example of the second photocatalyst carrier 22. The modified example of the second photocatalyst carrier 22 includes a plurality of the reflectors 20 together with a large number of granular bodies 12. In addition to being disposed on the surface, the granular material 12 and the reflecting material 20 are covered with the mesh member 28.
Thus, by disposing the reflecting material 20 together with the granular material 12, light for activating the photocatalyst 14 can be reflected in various directions, and the irradiation efficiency to the photocatalyst 14 can be improved.

尚、本発明の上記光触媒担持体10，22を、空気等の気体の浄化用に使用する場合には、上記粒状体12の表面をシリコン樹脂や、テトラフルオロエチレンの重合体（ポリテトラフルオロエチレン、ＰＴＦＥ）であるテフロン（登録商標）等の撥水性のある気体透過性樹脂で被覆しても良い。
このように、粒状体12の表面を撥水性のある気体透過性樹脂で被覆すると、粒状体12が空気中の水分を細孔内に吸着することが抑制され、その結果、浄化対象の気体を効率よく細孔内に吸着して、細孔内の光触媒と接触させることができる。 When the photocatalyst carriers 10 and 22 of the present invention are used for purifying gases such as air, the surface of the granular material 12 is made of silicon resin or tetrafluoroethylene polymer (polytetrafluoroethylene). , PTFE) or a gas-permeable resin having water repellency such as Teflon (registered trademark).
In this way, when the surface of the granular material 12 is coated with a water-repellent gas-permeable resin, the granular material 12 is prevented from adsorbing moisture in the air into the pores. It can be efficiently adsorbed in the pores and brought into contact with the photocatalyst in the pores.

上記においては、粒状体12を、透光性の多孔質吸着材であるシリカゲルで構成した場合を例に挙げて説明したが、本発明はこれに限定されるものではない。
例えば、バイコールガラス等のｎｍ単位の多数の細孔を有する透光性の多孔質ガラスを用いて上記粒状体12を構成しても良い。
また、セラミック、樹脂、金属等で構成した粒状体12の表面に、光触媒14を保持させても良い。
尚、粒状体12は透光性である必要は必ずしもないが、透光性を備えた粒状体12の場合には、照射された光の一部を透過させて他の粒状体12の光触媒14に光を照射することができ、光触媒14への照射効率が向上するため、透光性材料で粒状体12を構成するのが好ましい。 In the above, the case where the granular material 12 is made of silica gel, which is a translucent porous adsorbent, has been described as an example, but the present invention is not limited to this.
For example, the granular material 12 may be configured using translucent porous glass having a large number of nanometer pores such as Vycor glass.
Further, the photocatalyst 14 may be held on the surface of the granular material 12 made of ceramic, resin, metal or the like.
Note that the granular material 12 does not necessarily need to be translucent, but in the case of the granular material 12 having translucency, a part of the irradiated light is transmitted and the photocatalyst 14 of the other granular material 12 is transmitted. It is preferable that the granular material 12 is made of a translucent material because the light can be irradiated to the photocatalyst and the irradiation efficiency to the photocatalyst 14 is improved.

本発明に係る第１の光触媒担持体を模式的に示す正面図である。It is a front view which shows typically the 1st photocatalyst carrier based on this invention. 本発明に係る第１の光触媒担持体を模式的に示す平面図である。It is a top view which shows typically the 1st photocatalyst carrier based on this invention. 本発明に係る第１の光触媒担持体を模式的に示す部分拡大図である。It is the elements on larger scale which show typically the 1st photocatalyst carrier concerning the present invention. 第１の光触媒担持体の変形例を模式的に示す正面図である。It is a front view which shows typically the modification of a 1st photocatalyst carrier. 本発明に係る第２の光触媒担持体を模式的に示す正面図である。It is a front view which shows typically the 2nd photocatalyst carrier based on this invention. 本発明に係る第２の光触媒担持体を模式的に示す平面図である。It is a top view which shows typically the 2nd photocatalyst carrier based on this invention. 本発明に係る第２の光触媒担持体を模式的に示す底面図である。It is a bottom view which shows typically the 2nd photocatalyst carrier based on this invention. 第２の光触媒担持体の変形例を模式的に示す正面図である。It is a front view which shows typically the modification of a 2nd photocatalyst carrier. 従来の光触媒担持体を模式的に示す部分拡大図である。It is the elements on larger scale which show typically the conventional photocatalyst carrier.

符号の説明Explanation of symbols

10 第１の光触媒担持体
12 粒状体
14 光触媒
16 連通孔
18 網状容器
20 反射材
22 第２の光触媒担持体
24 基体
26 連通孔
28 網状部材
10 First photocatalyst carrier
12 Granules
14 Photocatalyst
16 communication hole
18 Mesh container
20 Reflector
22 Second photocatalyst carrier
24 substrate
26 Communication hole
28 Mesh member

Claims (3)

光触媒を保持して成る多数の粒状体を、多数の連通孔を備えた網状部材で被覆すると共に、上記網状部材に光触媒を保持せしめたことを特徴とする光触媒担持体。   A photocatalyst carrier characterized in that a large number of particles each holding a photocatalyst are coated with a net-like member having a large number of communication holes, and the photocatalyst is held on the net-like member. 上記粒状体を透光性の多孔質吸着材で構成し、該多孔質吸着材で構成された粒状体の表面及び細孔内に光触媒を保持せしめたことを特徴とする請求項１に記載の光触媒担持体。   The said granular material was comprised with the translucent porous adsorbent, and the photocatalyst was hold | maintained in the surface and pore of the granular material comprised with this porous adsorbent. Photocatalyst carrier. 上記多孔質吸着材が、シリカゲル又は多孔質ガラスであることを特徴とする請求項２に記載の光触媒担持体。
The photocatalyst carrier according to claim 2, wherein the porous adsorbent is silica gel or porous glass.
JP2004099661A 2004-03-30 2004-03-30 Photocatalyst carrying body Pending JP2005279534A (en)

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Cited By (1)

* 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

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JP2000107608A (en) * 1998-10-02 2000-04-18 Titan Kogyo Kk High strength photocatalyst, its production and its use
JP2000262909A (en) * 1999-03-23 2000-09-26 Sintokogio Ltd Product having photocatalytic function
JP2001029441A (en) * 1999-07-16 2001-02-06 Nhk Spring Co Ltd Photocatalyst deodorizing filter
JP2001187124A (en) * 1999-12-28 2001-07-10 Toshiba Lighting & Technology Corp Deodorizer and refrigerator
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JPH11262340A (en) * 1998-03-16 1999-09-28 Bio Oriented Technol Res Advancement Inst Deodorizing device for livestock excreta
JP2000079650A (en) * 1998-07-09 2000-03-21 Nippon Light Metal Co Ltd Structure having atmosphere purifying function
JP2000107608A (en) * 1998-10-02 2000-04-18 Titan Kogyo Kk High strength photocatalyst, its production and its use
JP2000262909A (en) * 1999-03-23 2000-09-26 Sintokogio Ltd Product having photocatalytic function
JP2001029441A (en) * 1999-07-16 2001-02-06 Nhk Spring Co Ltd Photocatalyst deodorizing filter
JP2001187124A (en) * 1999-12-28 2001-07-10 Toshiba Lighting & Technology Corp Deodorizer and refrigerator
JP2003111824A (en) * 2001-10-02 2003-04-15 Gifu Prefecture Filter using photocatalyst
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JP2004313844A (en) * 2003-04-11 2004-11-11 Hitachi Metals Ltd Harmful substance decomposing method

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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

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