JPH1094587A - Photocatalytic film - Google Patents
Photocatalytic filmInfo
- Publication number
- JPH1094587A JPH1094587A JP8251119A JP25111996A JPH1094587A JP H1094587 A JPH1094587 A JP H1094587A JP 8251119 A JP8251119 A JP 8251119A JP 25111996 A JP25111996 A JP 25111996A JP H1094587 A JPH1094587 A JP H1094587A
- Authority
- JP
- Japan
- Prior art keywords
- photocatalyst
- film
- binder
- adsorbent
- catalyst layer
- 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.)
- Pending
Links
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 41
- 239000011941 photocatalyst Substances 0.000 claims abstract description 63
- 239000003463 adsorbent Substances 0.000 claims abstract description 29
- 239000011230 binding agent Substances 0.000 claims abstract description 29
- 239000012779 reinforcing material Substances 0.000 claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims description 39
- 239000000758 substrate Substances 0.000 claims description 16
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims description 5
- 239000010445 mica Substances 0.000 claims description 5
- 229910052618 mica group Inorganic materials 0.000 claims description 5
- 239000012783 reinforcing fiber Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 9
- 238000000354 decomposition reaction Methods 0.000 abstract description 8
- 230000003197 catalytic effect Effects 0.000 abstract description 7
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract description 7
- 239000000377 silicon dioxide Substances 0.000 abstract description 6
- 229910021536 Zeolite Inorganic materials 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 abstract description 5
- 239000010457 zeolite Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000007146 photocatalysis Methods 0.000 abstract 1
- 238000000576 coating method Methods 0.000 description 14
- 239000011248 coating agent Substances 0.000 description 13
- 239000000945 filler Substances 0.000 description 10
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000001877 deodorizing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Catalysts (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、空気浄化に用いる
光触媒膜に関する。[0001] The present invention relates to a photocatalytic film used for air purification.
【０００２】[0002]
【従来の技術】従来、光触媒膜を基材（金属シート等）
表面に形成する方法として、基材表面に光触媒を接着剤
（以下バインダー）にてコーティングする方法が―般的
である。しかし、基材に光触媒のみをコーティングし脱
臭を行う場合には、光触媒自体の臭気の分解速度が遅い
ために、光触媒に取り込まれた臭気が完全に分解されず
にそのまま放出されてしまう虞れがある。従って、この
ように光触媒とバインダーからなる光触媒膜を形成する
場合は、臭気成分が密閉系の中にあり循環させる場合の
みに用途が限定されていた。2. Description of the Related Art Conventionally, a photocatalytic film is used as a base material (metal sheet, etc.).
As a method of forming on the surface, a method of coating a photocatalyst on the surface of a substrate with an adhesive (hereinafter referred to as a binder) is generally used. However, when deodorizing by coating only the photocatalyst on the base material, the decomposition rate of the odor of the photocatalyst itself is slow, and the odor taken into the photocatalyst may be released without being completely decomposed. is there. Therefore, when a photocatalyst film composed of a photocatalyst and a binder is formed in this way, the application is limited only when the odor component is circulated in a closed system.
【０００３】そこで、光触媒分解の効率を上げるため
に、光触媒に臭気吸着用の吸着剤を混合し、この混合物
をバインダーにより基材表面にコーティングする方法が
あり、これを図３に示して説明する。In order to increase the efficiency of photocatalytic decomposition, there is a method in which an adsorbent for adsorbing odor is mixed with the photocatalyst, and this mixture is coated on the surface of a base material with a binder. .
【０００４】図３において、Ｃは光触媒膜がその表面に
形成される基材、１はバインダー、２は吸着剤、３は酸
化チタン（ＴｉＯ2 ）等の光触媒である。なお、図中
で、バインダー１は〇、吸着剤２は△、光触媒は□で、
それぞれ示しているが、これはあくまで概念図であり、
それぞれの粒子が〇，△，□等の形状を取る訳ではな
い。In FIG. 3, C is a substrate on which a photocatalytic film is formed, 1 is a binder, 2 is an adsorbent, and 3 is a photocatalyst such as titanium oxide (TiO 2 ). In the figure, the binder 1 is Δ, the adsorbent 2 is Δ, the photocatalyst is □,
Each is shown, but this is only a conceptual diagram,
Each particle does not take the shape of 〇, △, □, etc.
【０００５】上記のように光触媒膜中に吸着剤２を含ま
せると、紫外線が照射されていなくても、吸着剤２が臭
気を吸着するため脱臭効果があり、なおかつ、臭気の吸
着後に、光触媒膜に紫外線を照射することにより、吸着
剤２が吸着した臭気を光触媒３が分解して、吸着剤２の
吸着能力を再生することが可能となり、これによって、
繰り返し使用することができるメンテナンスフリーの脱
臭システムが作られていた。[0005] When the adsorbent 2 is contained in the photocatalytic film as described above, the adsorbent 2 adsorbs the odor even if it is not irradiated with ultraviolet rays, so that it has a deodorizing effect. By irradiating the film with ultraviolet light, the odor adsorbed by the adsorbent 2 is decomposed by the photocatalyst 3 and the adsorbing ability of the adsorbent 2 can be regenerated.
A maintenance-free deodorization system that could be used repeatedly was created.
【０００６】[0006]
【発明が解決しようとする課題】上記したように、光触
媒と吸着剤を混合してバインダーにより基材表面にコー
ティングする場合には、紫外線の照射により吸着剤２の
吸着能力の再生が可能となったが、光触媒膜の再生時間
は、予想した時間を上回る長い時間が必要であること
が、実験の結果判明した。この原因は光触媒３と吸着剤
２と混ぜて光触媒膜を形成した結果、吸着剤２が立体障
害となり光触媒３に照射される紫外線を遮るため、光触
媒３に到達する紫外線の光量が低下して、光触媒３の分
解効率が低下するためである。As described above, when a photocatalyst and an adsorbent are mixed and coated on a substrate surface with a binder, the adsorbing ability of the adsorbent 2 can be regenerated by irradiating ultraviolet rays. However, experiments have shown that the regeneration time of the photocatalytic film requires a longer time than expected. The cause is that the photocatalyst film is formed by mixing the photocatalyst 3 and the adsorbent 2, and as a result, the adsorbent 2 becomes steric hindrance and blocks the ultraviolet light irradiated to the photocatalyst 3, so that the amount of ultraviolet light reaching the photocatalyst 3 decreases, This is because the decomposition efficiency of the photocatalyst 3 decreases.
【０００７】本発明は、吸着剤２による光触媒３の分解
効率の低下が押さえることができる光触媒膜を提供する
ことを目的としている。An object of the present invention is to provide a photocatalyst film capable of suppressing a decrease in the decomposition efficiency of the photocatalyst 3 due to the adsorbent 2.
【０００８】[0008]
【課題を解決するための手段】本発明の光触媒膜は、上
記課題を解決するために、請求項１に記載の発明は、基
材表面に光触媒と吸着剤とバインダーとからなる下触媒
層を形成し、該下触媒層の表面に光触媒とバインダーと
からなる上触媒層を形成するものである。According to a first aspect of the present invention, there is provided a photocatalyst film comprising a lower catalyst layer comprising a photocatalyst, an adsorbent and a binder on a substrate surface. And forming an upper catalyst layer comprising a photocatalyst and a binder on the surface of the lower catalyst layer.
【０００９】請求項２に記載の発明は、請求項１に記載
の発明に加えて、上記下触媒層に膜強化材を含むもので
ある。According to a second aspect of the present invention, in addition to the first aspect, the lower catalyst layer contains a membrane reinforcing material.
【００１０】請求項３に記載の発明は、請求項２に記載
の発明に加えて、上記膜強化材は、上記下触媒層の重量
に対して、重量比３％乃至３０％含むものである。According to a third aspect of the present invention, in addition to the second aspect, the membrane reinforcing material contains 3% to 30% by weight of the lower catalyst layer.
【００１１】請求項４に記載の発明は、請求項２に記載
の発明に加えて、上記膜強化材は、チタン酸カリウムを
用いるものである。According to a fourth aspect of the present invention, in addition to the second aspect, the film reinforcing material uses potassium titanate.
【００１２】請求項５に記載の発明は、請求項２に記載
の発明に加えて、上記膜強化繊維として、マイカを用い
るものである。According to a fifth aspect of the present invention, in addition to the second aspect, mica is used as the membrane-reinforced fiber.
【００１３】[0013]
【発明の実施の形態】以下図面を参照して、本発明を具
体化した実施の形態を説明し、本発明の理解に供する。
なお、従来例と同一部分には同一の符号を付して説明す
る。Embodiments of the present invention will be described below with reference to the drawings to provide an understanding of the present invention.
The same parts as those in the conventional example will be described with the same reference numerals.
【００１４】本発明の光触媒膜の第１の実施の形態を、
図１に示して説明する。図１において、Ｃは光触媒膜が
その表面に形成される基材、１はシリカ系の材料からな
るバインダー、２は合成ゼオライトからなる吸着剤、３
は酸化チタンからなる光触媒である。さらに、Ａはバイ
ンダー１と吸着剤２と光触媒３とからなる下触媒層、Ｂ
はバインダー１と光触媒３とからなる上触媒層である。The first embodiment of the photocatalyst film of the present invention is
This will be described with reference to FIG. In FIG. 1, C is a substrate on which a photocatalytic film is formed, 1 is a binder made of a silica-based material, 2 is an adsorbent made of a synthetic zeolite, 3
Is a photocatalyst made of titanium oxide. Further, A is a lower catalyst layer comprising a binder 1, an adsorbent 2, and a photocatalyst 3, and B
Is an upper catalyst layer comprising a binder 1 and a photocatalyst 3.
【００１５】なお、バインダー１としてはシリカ系を用
いるのは、シリカ系のバインダー１が光触媒３の活性を
損なわずに、かつ光触媒３との密着性が良いためであ
り、光触媒３に酸化チタン（ＴｉＯ2 ）を用いるのは、
種々使用されている光触媒の中で―番安定しているため
であり、吸着剤２に合成ゼオライトを使用するのは、膜
形成（焼付）温度を５００℃に上げることができるから
である。さらに、光触媒膜の形成温度を常温で行うため
には、光触媒膜の塗液中に、常温で硬化可能な硬化剤を
添加すれば、常温で光触媒膜を形成できる。なお、膜形
成（焼付）を５００℃以上で行うと、酸化チタンの結晶
系がアナターゼ型からルチル型に変化して触媒活性が落
ちるため、膜形成（焼付）は５００℃以下が適切であ
る。The reason why the silica-based binder is used as the binder 1 is that the silica-based binder 1 does not impair the activity of the photocatalyst 3 and has good adhesion to the photocatalyst 3. The use of TiO 2 )
Among the various photocatalysts used, this is because it is the most stable. The reason why the synthetic zeolite is used as the adsorbent 2 is that the film forming (baking) temperature can be raised to 500 ° C. Furthermore, in order to form the photocatalyst film at a normal temperature, a photocatalytic film can be formed at a normal temperature by adding a curing agent curable at a normal temperature to the coating liquid for the photocatalyst film. If the film formation (baking) is performed at 500 ° C. or higher, the crystal system of titanium oxide changes from anatase type to rutile type, and the catalytic activity decreases. Therefore, the film formation (baking) is appropriately performed at 500 ° C. or lower.
【００１６】本発明の光触媒膜の第２の実施の形態を、
図２に示して説明する。図２において、Ｃは光触媒膜が
その表面に形成される基材、１はシリカ系の材料からな
るバインダー、２は合成ゼオライトからなる吸着剤、３
は酸化チタンからなる光触媒、４は膜強化材として用い
るフィラーである。さらに、Ａはバインダー１と吸着剤
２と光触媒３とフィラー４とからなる下触媒層、Ｂはバ
インダー１と光触媒３とからなる上触媒層である。A second embodiment of the photocatalyst film of the present invention is
This will be described with reference to FIG. In FIG. 2, C is a substrate on which a photocatalytic film is formed, 1 is a binder made of a silica-based material, 2 is an adsorbent made of a synthetic zeolite, 3
Is a photocatalyst made of titanium oxide, and 4 is a filler used as a film reinforcing material. Further, A is a lower catalyst layer comprising a binder 1, an adsorbent 2, a photocatalyst 3 and a filler 4, and B is an upper catalyst layer comprising a binder 1 and a photocatalyst 3.
【００１７】なお、光触媒膜中にフィラーを含ませるこ
とにより、膜強度が上昇する。具体的には、フィラー４
としては、繊維状のチタン酸カリウム、偏平粒子である
マイカを用いることにより、触媒活性を大きく低下させ
ずに光触媒膜の強度を上げることができた。In addition, by including a filler in the photocatalytic film, the film strength is increased. Specifically, filler 4
By using fibrous potassium titanate and flat particles of mica, the strength of the photocatalyst film could be increased without significantly reducing the catalytic activity.
【００１８】[0018]
【実施例】以下本発明の各実施例及びその比較例の詳細
を説明する。EXAMPLES Examples of the present invention and comparative examples will be described in detail below.
【００１９】（塗液の調整）始めに、光触媒膜の形成に
用いる塗液の成分について説明する。塗液の成分である
バインダー（シリカ）及び光触媒（酸化チタン）は、石
原産業（株）製のＳＴ―Ｋ０３を用いる。なお、ＳＴ―
Ｋ０３は、バインダーと酸化チタンが１：１の割合で含
有された液体である。また、吸着剤２としては、日産ガ
ードラー（株）製の合成ゼオライトを用いた。(Adjustment of Coating Liquid) First, components of a coating liquid used for forming a photocatalytic film will be described. ST-K03 manufactured by Ishihara Sangyo Co., Ltd. is used as a binder (silica) and a photocatalyst (titanium oxide) as components of the coating solution. ST-
K03 is a liquid containing a binder and titanium oxide at a ratio of 1: 1. Further, as the adsorbent 2, a synthetic zeolite manufactured by Nissan Gardler Co., Ltd. was used.
【００２０】下触媒層Ａの塗液の成分は、表１に示す比
較例、実施例１、実施例２、実施例３についてそれぞれ
重量比で示した。The components of the coating solution for the lower catalyst layer A are shown in weight ratio for Comparative Examples, Examples 1, 2 and 3 shown in Table 1.
【００２１】[0021]
【表１】 [Table 1]
【００２２】上触媒層Ｂの塗液の成分は、ＳＴ―Ｋ０３
を２―プロパノールにて３倍に希釈した物を使用した。
また、ＳＴ―Ｋ０３は常温でも硬化するが、焼付を行う
ことにより、より強い皮膜強度が得られることが分かっ
ており、最低でも１５０℃以上に焼付温度を上げるのが
望ましい。今回は３５０℃まで焼付温度を上げて試料を
作製した。The component of the coating solution for the upper catalyst layer B is ST-K03
Was diluted 3-fold with 2-propanol.
ST-K03 also cures at room temperature, but it is known that stronger film strength can be obtained by baking, and it is desirable to raise the baking temperature to at least 150 ° C. or more. In this case, the sample was prepared by increasing the baking temperature to 350 ° C.
【００２３】（塗布方法）基材Ｃにはアルミ材シートを
使用し、６０ｍｍ×１６０ｍｍで０．１ｍｍ厚のもの
に、塗液を塗布した。膜形成には、浸積法を用いて塗液
の中に基材を浸積させ、乾燥を１００℃で１時間した後
に、３５０℃で１時間焼付を行った。この操作をくり返
し、下触媒層Ａの膜厚が４５μｍになるまで行った。ま
た、上触媒層Ｂは２回塗布を行い約３μｍ膜厚となるよ
う塗布を行った。(Coating Method) An aluminum sheet was used as the substrate C, and a coating liquid was applied to a substrate having a size of 60 mm × 160 mm and a thickness of 0.1 mm. For film formation, the substrate was immersed in a coating solution by using an immersion method, dried at 100 ° C. for 1 hour, and baked at 350 ° C. for 1 hour. This operation was repeated until the thickness of the lower catalyst layer A became 45 μm. Further, the upper catalyst layer B was applied twice so as to have a thickness of about 3 μm.
【００２４】（評価方法）上記のように光触媒膜を形成
したシートの密着性を、碁盤目テープ剥離試験を行って
調べた。なお、碁盤目テープ剥離試験とは、上記のよう
にして基材Ｃ表面に形成した光触媒膜の表面に碁盤目状
の切れ目を形成し、光触媒膜の表面にテープを貼付した
後、テープを光触媒膜から剥がして光触媒膜の基材Ｃか
らの剥離具合により、膜強度の評価を行った。(Evaluation Method) The adhesiveness of the sheet on which the photocatalytic film was formed as described above was examined by performing a cross-cut tape peeling test. The cross-cut tape peeling test was performed by forming a cross-cut on the surface of the photocatalytic film formed on the surface of the base material C as described above, applying the tape to the surface of the photocatalytic film, and then applying the tape to the photocatalytic film. The strength of the film was evaluated by peeling off the film from the substrate C of the photocatalytic film.
【００２５】さらに、光触媒特性については２７リット
ルの容積のボックスに臭気（被分解物）であるアセトア
ルデヒドを初期濃度１５０ｐｐｍとして、光触媒膜に吸
着させた後、光触媒膜に紫外線を照射して、アセトアル
デヒドの分解時間を評価した。Further, as for the photocatalytic properties, acetaldehyde, which is an odor (decomposed matter), was adsorbed on the photocatalyst film at an initial concentration of 150 ppm in a box having a capacity of 27 liters. The degradation time was evaluated.
【００２６】（比較例）比較例としては、上記した方法
を用いて、６回塗布を繰返して膜厚４５μｍとして、下
触媒層のみからなる光触媒層のシートを２枚作製した。
比較例の碁盤目テープ剥離試験の結果は、光触媒膜（下
触媒層のみからなる）のテープ貼着面側が剥離し、光触
媒膜の基材Ｃとの界面側は、基材Ｃ側に残ることが判明
した。(Comparative Example) As a comparative example, two sheets of a photocatalyst layer consisting of only the lower catalyst layer were prepared by repeating the coating six times to a film thickness of 45 μm using the above-described method.
The results of the cross-cut tape peeling test of the comparative example show that the photocatalyst film (consisting of only the lower catalyst layer) has the tape-attached surface side peeled off, and the interface side of the photocatalyst film with the substrate C remains on the substrate C side. There was found.
【００２７】光触媒特性試験の結果は、アセトアルデヒ
ドの濃度が、ｌ０ｐｐｍから２ｐｐｍまで分解するに
は、１３．５時間かかることが判明した。The results of the photocatalytic property test revealed that it took 13.5 hours for the concentration of acetaldehyde to decompose from 10 ppm to 2 ppm.
【００２８】（実施例１）上記比較例の膜上に、上触媒
層Ｂの塗布を３回繰返し、上触媒層Ｂが約ｌμｍの膜厚
となるように構成した２重層の光触媒膜を作製した。(Example 1) The application of the upper catalyst layer B was repeated three times on the film of the above comparative example to produce a double-layered photocatalytic film in which the upper catalyst layer B had a thickness of about 1 µm. did.
【００２９】実施例１の碁盤目テープ剥離試験の結果
は、上触媒層Ｂ及び下触媒層Ｃの上触媒層に接する面側
の全体がテープと共に剥離し、下触媒層の基材Ｃとの界
面側は基材Ｃ側に残ることが判明した。光触媒特性試験
の結果は、アセトアルデヒドの濃度が、ｌ０ｐｐｍから
２ｐｐｍまで分解するには、８時間かかることが判明し
た。The results of the cross-cut tape peeling test of Example 1 show that the entire surface side of the upper catalyst layer B and the lower catalyst layer C in contact with the upper catalyst layer was peeled together with the tape, and the lower catalyst layer and the substrate C It was found that the interface side remained on the substrate C side. The results of the photocatalytic property test revealed that it took 8 hours for the acetaldehyde concentration to decompose from 10 ppm to 2 ppm.
【００３０】（実施例２）表１に示す組成の塗液を使用
し、上触媒層Ｂ、下触媒層Ｃの２層構造の光触媒膜を作
製した。実施例２の碁盤目テープ剥離試験の結果は、光
触媒膜の剥離は全く起こらなかった。これは、フィラー
４を添加したための効果と考えられる。なお、フィラー
が５％以下ではこのような結果は見られなかった。ま
た、光触媒特性試験では、アセトアルデヒドの濃度がｌ
０ｐｐｍから２ｐｐｍまでの分解時間が１０時間かかる
ことが判明した。これは、実施例２では、実施例１に比
較してフィラー４として用いるチタン酸カリウムが入っ
たために、光触媒特性が弱くなったためと思われる。(Example 2) A photocatalyst film having a two-layer structure of an upper catalyst layer B and a lower catalyst layer C was prepared using a coating solution having the composition shown in Table 1. As a result of the cross-cut tape peeling test in Example 2, no peeling of the photocatalytic film occurred. This is considered to be the effect of adding the filler 4. Note that such a result was not observed when the filler content was 5% or less. In the photocatalytic property test, the concentration of acetaldehyde was
It was found that the decomposition time from 0 ppm to 2 ppm took 10 hours. This is presumably because in Example 2, the photocatalytic properties were weakened because potassium titanate used as the filler 4 was included as compared with Example 1.
【００３１】（実施例３）表１に示す組成の塗液を使用
し、上触媒層Ｂ、下触媒層Ａの２層構造の光触媒膜を作
製した。実施例３の碁盤目テープ剥離試験の結果は、光
触媒膜の剥離は全く起こらなかった。また、光触媒特性
試験の結果は、アセトアルデヒドの濃度が、ｌ０ｐｐｍ
から２ｐｐｍまで分解するには、８．５時間かかること
が判明した。なお、実施例３は、実施例１に比較してフ
ィラー４が入ったために、実施例２と同様に光触媒特性
が低下したためと思われる。ただし、実施例２と比較し
て、実施例３の光触媒特性が改善されているのは、マイ
カからなるフィラー４の粒子か偏平なために、下触媒膜
Ａ中に空間が生じやすく、フィラー４の表面に光触媒
層、および吸着層が形成されることにより、光触媒膜の
比表面積が増えたためであると推測される。なお、上記
した比較例、実施例１乃至実施例３の密着性および光触
媒特性の結果を表２にまとめて示す。Example 3 A photocatalyst film having a two-layer structure of an upper catalyst layer B and a lower catalyst layer A was prepared using a coating liquid having the composition shown in Table 1. As a result of the cross-cut tape peeling test in Example 3, no peeling of the photocatalyst film occurred. The results of the photocatalytic property test show that the concentration of acetaldehyde was 10 ppm.
It was found that it took 8.5 hours to decompose from to 2 ppm. In addition, it seems that the photocatalytic property of Example 3 was decreased as in Example 2 because the filler 4 was included as compared with Example 1. However, the reason why the photocatalytic property of Example 3 is improved as compared with Example 2 is that the particles of the filler 4 composed of mica are flat or flat, so that a space is easily generated in the lower catalyst film A. It is presumed that the specific surface area of the photocatalyst film increased due to the formation of the photocatalyst layer and the adsorption layer on the surface of. Table 2 summarizes the results of the adhesion and the photocatalytic properties of the comparative example and Examples 1 to 3.
【００３２】[0032]
【表２】 [Table 2]
【００３３】[0033]
【発明の効果】請求項１によれば、基材表面に光触媒と
吸着剤とバインダーとからなる下触媒層を形成し、該下
触媒層の表面に光触媒とバインダーとからなる上触媒層
を形成するため、上触媒層では吸着剤が紫外線を遮るこ
とないため、光触媒の臭気分解効率を落とすことなく、
吸着剤が脱臭吸着することができ、紫外線照射により、
吸着剤が吸着した臭気成分を光触媒が効率よく分解する
ことができる。According to the first aspect, a lower catalyst layer comprising a photocatalyst, an adsorbent and a binder is formed on the surface of a substrate, and an upper catalyst layer comprising a photocatalyst and a binder is formed on the surface of the lower catalyst layer. Because the adsorbent does not block ultraviolet light in the upper catalyst layer, the odor decomposition efficiency of the photocatalyst is not reduced,
The adsorbent can be deodorized and adsorbed.
The photocatalyst can efficiently decompose the odor component adsorbed by the adsorbent.
【００３４】請求項２によれば、上記下触媒層に膜強化
材を含むため、光触媒膜の強度を高めることができる。According to the second aspect, since the lower catalyst layer contains a film reinforcing material, the strength of the photocatalytic film can be increased.
【００３５】請求項３によれば、上記膜強化材は、上記
下触媒層の重量に対して、重量比３％乃至３０％含むた
め、光触媒膜の臭気の分解効率及び吸着効率を低下する
ことなく、光触媒膜の強度を上げることができる。According to the third aspect of the present invention, since the weight ratio of the film reinforcing material to the lower catalyst layer is 3% to 30%, the odor decomposition efficiency and the adsorption efficiency of the photocatalytic film are reduced. In addition, the strength of the photocatalyst film can be increased.
【００３６】請求項４によれば、上記膜強化材にチタン
酸カリウムを用いるため、光触媒膜の強度を上げること
ができる。According to the fourth aspect, since potassium titanate is used as the film reinforcing material, the strength of the photocatalytic film can be increased.
【００３７】請求項５によれば、上記膜強化材にマイカ
を用いることにより、光触媒性能、吸着性能を落とすこ
となく光触媒膜の強度を上げることができる。According to the fifth aspect, by using mica as the film reinforcing material, the strength of the photocatalytic film can be increased without deteriorating the photocatalytic performance and adsorption performance.
【図１】本発明の第１の実施の形態である光触媒膜の構
造を示す断面図である。FIG. 1 is a cross-sectional view illustrating a structure of a photocatalytic film according to a first embodiment of the present invention.
【図２】本発明の第２の実施の形態である光触媒膜の構
造を示す断面図である。FIG. 2 is a cross-sectional view illustrating a structure of a photocatalytic film according to a second embodiment of the present invention.
【図３】従来の光触媒膜の構造を示す断面図である。FIG. 3 is a cross-sectional view showing a structure of a conventional photocatalytic film.
１ バインダー（〇） ２ 吸着剤（△） ３ 光触媒（□） ４ フィラー Ａ 下触媒層 Ｂ 上触媒層 Ｃ 基材 Reference Signs List 1 binder (〇) 2 adsorbent (△) 3 photocatalyst (□) 4 filler A lower catalyst layer B upper catalyst layer C base material
フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ０１Ｊ 35/02 Ｂ０１Ｊ 35/02 Ｐ Ｌ 37/02 ３０１ 37/02 ３０１Ｌ Continued on the front page (51) Int.Cl. 6 Identification code FI B01J 35/02 B01J 35/02 PL 37/02 301 37/02 301L
Claims (5)
とからなる下触媒層を形成し、該下触媒層の表面に光触
媒とバインダーとからなる上触媒層を形成することを特
徴とする光触媒膜。1. A photocatalyst comprising: forming a lower catalyst layer comprising a photocatalyst, an adsorbent and a binder on the surface of a substrate; and forming an upper catalyst layer comprising a photocatalyst and a binder on the surface of the lower catalyst layer. film.
徴とする請求項１に記載の光触媒膜。2. The photocatalytic film according to claim 1, wherein the lower catalyst layer contains a film reinforcing material.
対して、重量比３％乃至３０％含むことを特徴とする請
求項２に記載の光触媒膜。3. The photocatalyst film according to claim 2, wherein the weight ratio of the film reinforcing material is 3% to 30% based on the weight of the lower catalyst layer.
いることを特徴とする請求項２に記載の光触媒膜。徴と
する光触媒。4. The photocatalytic film according to claim 2, wherein said film reinforcing material is made of potassium titanate. The photocatalyst to be characterized.
ことを特徴とする請求項２に記載の光触媒膜。5. The photocatalyst film according to claim 2, wherein mica is used as the film reinforcing fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8251119A JPH1094587A (en) | 1996-09-24 | 1996-09-24 | Photocatalytic film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8251119A JPH1094587A (en) | 1996-09-24 | 1996-09-24 | Photocatalytic film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1094587A true JPH1094587A (en) | 1998-04-14 |
Family
ID=17217951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8251119A Pending JPH1094587A (en) | 1996-09-24 | 1996-09-24 | Photocatalytic film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1094587A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10137329A (en) * | 1996-11-15 | 1998-05-26 | Sharp Corp | Air purifying film and its manufacture |
| JPH11300150A (en) * | 1998-04-22 | 1999-11-02 | Aqueous Reserch:Kk | Filter for cleaning air and air purifier using the same |
| KR100395264B1 (en) * | 2001-05-15 | 2003-08-21 | 주식회사 엔바이오니아 | Photocatalytic composition having functions of air purification and antimicrobial activity and a moth-proof net coated with the composition |
| JP2006297351A (en) * | 2005-04-25 | 2006-11-02 | Showa Denko Kk | Photocatalyst film and manufacturing method |
| JP2006297350A (en) * | 2005-04-25 | 2006-11-02 | Showa Denko Kk | Photocatalyst film and manufacturing method |
| JP2008272651A (en) * | 2007-04-27 | 2008-11-13 | Matsushita Electric Ind Co Ltd | Photocatalytic member and air quality purification apparatus using this photocatalytic member |
-
1996
- 1996-09-24 JP JP8251119A patent/JPH1094587A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10137329A (en) * | 1996-11-15 | 1998-05-26 | Sharp Corp | Air purifying film and its manufacture |
| JPH11300150A (en) * | 1998-04-22 | 1999-11-02 | Aqueous Reserch:Kk | Filter for cleaning air and air purifier using the same |
| KR100395264B1 (en) * | 2001-05-15 | 2003-08-21 | 주식회사 엔바이오니아 | Photocatalytic composition having functions of air purification and antimicrobial activity and a moth-proof net coated with the composition |
| JP2006297351A (en) * | 2005-04-25 | 2006-11-02 | Showa Denko Kk | Photocatalyst film and manufacturing method |
| JP2006297350A (en) * | 2005-04-25 | 2006-11-02 | Showa Denko Kk | Photocatalyst film and manufacturing method |
| JP2008272651A (en) * | 2007-04-27 | 2008-11-13 | Matsushita Electric Ind Co Ltd | Photocatalytic member and air quality purification apparatus using this photocatalytic member |
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