JP2001129364A - PHOTOCATALYST CARRIER AND METHOD FOR DECOMPOSING NOx - Google Patents
PHOTOCATALYST CARRIER AND METHOD FOR DECOMPOSING NOxInfo
- Publication number
- JP2001129364A JP2001129364A JP31774499A JP31774499A JP2001129364A JP 2001129364 A JP2001129364 A JP 2001129364A JP 31774499 A JP31774499 A JP 31774499A JP 31774499 A JP31774499 A JP 31774499A JP 2001129364 A JP2001129364 A JP 2001129364A
- Authority
- JP
- Japan
- Prior art keywords
- photocatalyst
- net
- immobilized
- air
- tio2
- 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
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 9
- 230000001699 photocatalysis Effects 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 13
- 239000011230 binding agent Substances 0.000 description 7
- 239000000758 substrate Substances 0.000 description 5
- -1 WO 3 Inorganic materials 0.000 description 2
- 238000004887 air purification Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- VCZQFJFZMMALHB-UHFFFAOYSA-N tetraethylsilane Chemical compound CC[Si](CC)(CC)CC VCZQFJFZMMALHB-UHFFFAOYSA-N 0.000 description 2
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は表面に光触媒を固定化し
た網を用いた大気の浄化方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for purifying air using a net having a photocatalyst fixed on its surface.
【従来の技術】大気環境中のＮＯｘは光化学スモッグや
酸性雨の原因物質であるだけでなく、呼吸器系疾患を引
き起こすため、特に大都市圏の自動車交通の激しい道路
周辺では深刻な問題になっている。その大気の浄化方法
に関し、光触媒作用を有するアナターゼ型ＴｉＯ２を利
用した大気の浄化方法が着目されている。NO x Background of the Invention in the air environment is not only a cause of photochemical smog and acid rain, to cause respiratory disease, especially a serious problem in heavy road around the automobile traffic in the metropolitan area Has become. With regard to the method for purifying the atmosphere, attention has been paid to a method for purifying the atmosphere using anatase-type TiO 2 having a photocatalytic action.
【０００２】ＴｉＯ２を用いる場合、微粉末状態で大気
を処理することは出来ないため、適切な基材に何らかの
方法で固定化しなければならない。ＴｉＯ２を固定化し
たものは、屋外に置くだけで太陽光により、ＮＯｘを除
去する大気浄化材料になりうる。しかしＮＯｘの分解効
率が良く、耐久性のある大気浄化材料にするには、表面
に露出したＴｉＯ２の露出表面積を広くし、しかも基材
頑強に固定化したものにする必要がある。[0002] When TiO 2 is used, the atmosphere cannot be treated in the form of fine powder, so that it must be immobilized on an appropriate substrate by some method. What immobilized TiO 2 can be an air purifying material that removes NO x by sunlight just by placing it outdoors. However, in order to obtain a durable air purifying material with good NO x decomposition efficiency, it is necessary to increase the exposed surface area of TiO 2 exposed on the surface and to firmly fix the substrate.
【０００３】ＴｉＯ２などの粉末の固定化用バインダー
として有機質の樹脂を使用すれば簡単にＴｉＯ２の露出
面積が広く、確実に基材に固定化可能であるが、その方
法で形成した膜は、太陽光など光の照射により膜そのも
のが短期間で劣化するので好ましくない。そのため、バ
インダーとして用いる有機樹脂は最低限にする必要があ
る。また、光で劣化しない無機質バインダーを使用する
場合には少量で光触媒を確実に固定化出来るものを選択
しなければならない。そのためのバインダーとしては、
テトラエチルシリコンの加水分解液やオルガノポリシロ
キサンなどが知られている。また固定化した膜のＴｉＯ
２の露出表面積を広くして光触媒の有効面積を広くする
目的で、コンクリート面や無機多孔体など、比表面積の
広い材料に、前記バインダーなどを用いたＴｉＯ２膜前
駆体溶液を、塗布乾燥する方法で作製した材料が公開さ
れている。また既に道路の側壁用遮音板の表面にＴｉＯ
２を固定化したものについて、大気浄化効果と耐久性を
確認するための試験が行われている。[0003] Using the resin of the organic as a powder immobilized binders such as TiO 2 easily exposed area of the TiO 2 is wide, it is possible immobilized reliably substrate film formed by the method In addition, the film itself deteriorates in a short time due to irradiation with light such as sunlight, which is not preferable. Therefore, it is necessary to minimize the amount of the organic resin used as the binder. When an inorganic binder that does not deteriorate by light is used, it is necessary to select a binder that can securely fix the photocatalyst with a small amount. As a binder for that,
Hydrolysis solutions of tetraethyl silicon, organopolysiloxanes, and the like are known. In addition, the fixed film TiO
In order to widen the exposed surface area of No. 2 and widen the effective area of the photocatalyst, apply a TiO 2 film precursor solution using the above binder or the like to a material having a large specific surface area, such as a concrete surface or an inorganic porous material, and dry it. Materials made by the method are published. Also, the surface of the sound insulation plate for the side wall of the road has already
A test for confirming the air purification effect and the durability of the immobilized product of No. 2 has been conducted.
【０００４】[0004]
【発明が解決しようとする課題】本発明はＮＯｘ分解に
関する大気の浄化に光触媒を用いる方法に於いて、形成
した光触媒の露出表面積をより広くすることにより、Ｎ
Ｏｘを効率良く分解して大気を浄化しようとするもので
ある。In the method of using a photocatalyst to purify the air with the present invention are NO x decomposition INVENTION SUMMARY is], by the exposed surface area of the formed photocatalyst wider, N
Ox is efficiently decomposed to purify the atmosphere.
【０００５】[0005]
【課題を解決するための手段】本発明者は、光触媒膜固
定化体を用いるＮＯｘの分解による大気の浄化に関し鋭
意研究した結果、光触媒を固定化した網を形成しその網
を複数枚重ねるて用いる方法により、ＮＯｘの分解効率
が良く、副生するＮＯ２も極端に少なく出来ることを見
出したものである。Means for Solving the Problems The present inventor has intensively studied relates air quality due to decomposition of the NO x using the photocatalyst film immobilized body, overlaying a plurality of the network to form a network in which a photocatalyst is immobilized by the method using Te, good decomposition efficiency of NO x, it has been found that by-produced NO 2 can also be extremely reduced.
【０００６】[0006]
【発明の実施の形態】本発明に用いる光触媒としては、
ＴｉＯ２、ＷＯ３、ＺｎＯ、Ｂｉ２Ｏ３、Ｆｅ２Ｏ３、
Ｉｎ２Ｏ３、ＴｉＳｒＯ３などが使用可能であるが、性
能及び経済性の観点からアナターゼ型のＴｉＯ２が好ま
しい。また本発明においてはＰｔ、Ｒｈ、Ｒｕ、Ｐｄな
どの金属或いはそれらの化合物を併用することも可能で
ある。BEST MODE FOR CARRYING OUT THE INVENTION The photocatalyst used in the present invention includes:
TiO 2 , WO 3 , ZnO, Bi 2 O 3 , Fe 2 O 3 ,
In 2 O 3 , TiSrO 3 and the like can be used, but anatase type TiO 2 is preferable from the viewpoint of performance and economy. In the present invention, metals such as Pt, Rh, Ru, and Pd or compounds thereof can be used in combination.
【０００７】本発明はＴｉＯ２固定化体に於けるＴｉＯ
２露出表面積を広くするための基材として網を選択し
た。例えば板ガラスなど平坦なものの一定面積に対し、
同じ大きさの網を形成する材料の表面積は狭いが、網を
複数重ねた場合の表面積、即ち光を照射した場合の面積
は広くなる。また網を複数枚重ねたものに光を照射した
場合、散乱光が網の裏面にも照射されるため、有効面積
はさらに広くなることに着目研究し本発明を完成したも
のである。[0007] The present invention relates to TiO 2 immobilized on TiO 2.
(2) A mesh was selected as a substrate for increasing the exposed surface area. For example, for a certain area of flat things such as sheet glass,
Although the surface area of a material forming a net of the same size is small, the surface area when a plurality of nets are stacked, that is, the area when light is irradiated becomes large. In addition, the present invention has been completed by studying that the effective area is further increased because the scattered light is also applied to the back surface of the net when irradiating light on a plurality of nets.
【０００８】また本発明の光触媒を固定化した網の材質
としては、光触媒作用により劣化しない材質であれば特
に制限はなく、品質及び経済性の観点から金属製、又は
ガラス繊維製の網を使用可能であるが、特にステンレス
製のものが好ましい。本発明は網の編み目の形状に関し
て特に制限は無く、真四角状、丸状など何れの形状でも
差し支えない。また本発明の網とは針金の様な線材をつ
なぎ合わせた簾状のもの、或いは孔の開いた金属板状の
もの、細長い板状の金属をつなぎ合わせたものなど、孔
やすき間から光が透過する基材を含むものである。The material of the mesh to which the photocatalyst of the present invention is fixed is not particularly limited as long as the material does not deteriorate by the photocatalysis, and a metal or glass fiber mesh is used from the viewpoint of quality and economy. Although it is possible, stainless steel is particularly preferable. In the present invention, there is no particular limitation on the shape of the mesh of the net, and any shape such as a square or a circle may be used. Further, the net of the present invention means that a wire is connected from a wire, such as a wire, a metal plate having a hole, a metal plate having a long and thin line, and light is transmitted from a hole or a gap. It includes a transparent substrate.
【０００９】光触媒によるＮＯｘ分解方法に関する本発
明は、光触媒の有効面積を広くすることに着目したもの
であるため、光触媒の種類、光触媒のバインダー成分等
に制限はなく網に付着するものであれば使用することが
出来るが、特に脂肪族モノカルボン酸Ｚｒの有機溶剤溶
液にＴｉＯ２を分散させたものを、塗布乾燥後に４００
℃以上で焼成し、さらにテトラエチルシリコンの加水分
解液にＴｉＯ2を分散した溶液を塗布する方法で形成し
た担持体が望ましい。[0009] The present invention relates to NO x decomposition method by the photocatalyst, whether intended for those focused on possible to increase the effective area of the photocatalyst, the type of the photocatalyst, which adheres to the network is not limited to the binder component of the photocatalyst such as TiO 2 dispersed in an organic solvent solution of an aliphatic monocarboxylic acid Zr is preferably used after coating and drying.
A support formed by a method of baking at a temperature of not less than ° C. and further applying a solution of TiO2 dispersed in a hydrolyzed solution of tetraethylsilicon is desirable.
【００１０】なお本発明の光触媒を固定化した網は、網
の表裏全面に光触媒を固定化したもの、表面片面のみに
固定化したものの制限はなく、網の形状や道路現場への
敷設の仕方などを考慮して決めることが好ましい。即ち
１枚の網を折り曲げたり、渦状に巻いて有効表面積を広
くする場合は全面に固定化することが好ましく、２枚以
上重ねて用いるような場合は光の当たる表面片面のみに
固定化したものでも差し支え無い。The net having the photocatalyst immobilized thereon according to the present invention is not limited to those having the photocatalyst immobilized on the entire front and back surfaces of the net, and those having only one surface immobilized thereon. It is preferable to determine in consideration of such factors. In other words, it is preferable to fix the entire surface when one net is bent or spirally wound to increase the effective surface area, and when two or more nets are used, they are fixed to only one side of the surface exposed to light. But it doesn't hurt.
【００１１】また網に対する光触媒の固定化時期として
も特に制限は無く、光触媒を固定化した網を所望の形態
に加工する方法、或いは網を折り曲げ、さらには複数枚
重ねた枠に固定するなど成形或いは加工後に光触媒を担
持させる方法など特に制限は無く、より経済的で確実に
固定化出来る時期に固定化することが好ましい。There is no particular limitation on the timing of fixing the photocatalyst to the net. A method for processing the net on which the photocatalyst is fixed into a desired form, or bending the net and fixing it to a frame in which a plurality of sheets are stacked. Alternatively, there is no particular limitation on the method of supporting the photocatalyst after processing, and it is preferable that the photocatalyst be fixed at a time when it can be more economically and surely fixed.
【００１２】本発明の光触媒を表面に形成した網の網を
形成する基材の断面の形状にも制限はないが、断面が円
形のものが望ましい。即ち円形の場合、光触媒を固定化
した網の最終加工物を道路現場に設置した場合、太陽光
の当たる時間帯に関係なく光の照射面積が広くなるた
め、ＮＯｘの分解効率が良くなる。The shape of the cross section of the base material forming the net formed by forming the net of the photocatalyst of the present invention on the surface is not limited, but preferably has a circular cross section. That is, circular, when the photocatalyst final workpiece of immobilized network installed in the road scene, the light irradiation area regardless of the time zone exposed to sunlight is made wider, the decomposition efficiency of the NO x is improved.
【００１３】本発明の光触媒を表面に固定化した成形加
工網とは、これらのみに限定されないが、網を波板状に
加工したもの、網を渦巻き状にしたもの、円筒状の網を
層状に重ねたもののことである。また網を複数枚重ねて
用いる場合、網を形成している１本の金属、或いは１本
の糸状ガラス繊維の直径や網の目開きに特に制限はない
が、目開きは太陽光の照射方向に向かって大きくするこ
とが好ましい。また道路の上を覆う様な方式で、光触媒
固定化した網を敷設する場合は、特に小さい目開きの網
を道路側、即ちガスの発生源側にすると、大気中の浮遊
粒子物質の拡散を抑制する効果も期待出来る。[0013] The shaping net having the photocatalyst of the present invention immobilized on the surface thereof is not limited to these. However, the net is formed into a corrugated plate, the net is formed into a spiral shape, and the cylindrical net is formed into a layered shape. It is the thing which was piled up. When a plurality of nets are used, the diameter of one metal or one fiber glass fiber forming the net or the size of the mesh is not particularly limited. It is preferable to increase toward. In addition, when laying a net fixed with photocatalyst in such a way that it covers the top of the road, the diffusion of suspended particulate matter in the atmosphere can be reduced by setting the net with small openings particularly on the road side, that is, on the gas generation side. The effect of suppressing can be expected.
【００１４】光触媒膜を固定化した網を層状に重ねる場
合、その層間隔に特に制限は無いが、完全に密着させる
より間隔を開ける方が好ましい。即ち光触媒を担持した
網を完全に密着させると完全な陰の部分が出来、光触媒
の有効面積が狭くなるが、間隔を開けた場合は乱反射し
た光の照射を受けるため、光触媒の有効面積が広くな
る。When laminating a net having the photocatalyst film immobilized thereon, there is no particular limitation on the interval between the layers. That is, when the net supporting the photocatalyst is completely adhered, a completely shaded portion is formed, and the effective area of the photocatalyst is reduced. Become.
【００１５】本発明の光触媒を表面に固定化した金網
を、実際の道路現場に敷設する場合、その固定化方法は
経済的で確実に出来る方法であれば特に制限はないが、
ＮＯｘ分解効率をより確実にするためには、太陽光を完
全に遮断しない程度の層状にすることが望ましい。また
現場に於ける敷設作業性の観点から、前記光触媒膜を形
成した網及び網を波板状に加工したもの、及びそれらを
複数枚重ねたもの、網を渦巻き状にしたものや円筒状の
網を層状に重ねたものを、枠に固定して敷設することが
好ましい。When laying the wire mesh having the photocatalyst of the present invention immobilized on the surface thereof at an actual road site, the fixing method is not particularly limited as long as it is an economical and reliable method.
In order to ensure the NO x decomposition efficiency, it is desirable to form a layer that does not completely block sunlight. Further, from the viewpoint of laying workability at the site, the net formed with the photocatalyst film and the net processed into a corrugated plate, and those obtained by stacking a plurality of the nets, the net formed into a spiral shape, and the cylindrical shape are formed. It is preferable that the nets are layered and fixed to the frame and laid.
【００１６】大気汚染が深刻な問題になっている大都市
圏の自動車交通の激しい道路周辺においては、より確実
にＮＯｘを分解する必要がある。そのためそれら地域に
於いては、本発明の光触媒を表面に担持した網の成形加
工物を、道路を覆う形で敷設することが好ましい。その
場合の並べ方としては屋根瓦式、あるいはアーチ式など
特に制限はないが、大気の浄化効率の観点から層を厚く
することが好ましい。即ち敷設の形態としては汚染した
大気と光触媒がより長く接触し、さらに太陽光がより長
く照射されるようにすることが望ましく、ブラックライ
トや蛍光灯或いは殺菌灯などを照射することも好まし
い。また網の表面に生成したＮＯ３を除く目的で夜間の
みに、一定時間スプリンクラーなどで散水して洗浄する
ことも可能である。[0016] In violent road around the automobile traffic in the metropolitan areas where air pollution is a serious problem, it is necessary to disassemble the more reliably NO x. Therefore, in those areas, it is preferable to lay the net formed product carrying the photocatalyst of the present invention on the surface so as to cover the road. The arrangement in this case is not particularly limited, such as a roof tile type or an arch type, but it is preferable to make the layer thicker from the viewpoint of air purification efficiency. That is, it is desirable that the photocatalyst is in contact with the polluted air for a longer time and the sunlight is radiated for a longer time, and it is also preferable to irradiate a black light, a fluorescent lamp, a germicidal lamp, or the like. It is also possible to wash by sprinkling water for a certain period of time only at night, for the purpose of removing NO 3 generated on the surface of the net.
【００１７】[0017]
【実施例】（ 試験片の作成 ）表−１の材料にオクチル
酸Ｚｒ溶液とＴｉＯ２（石原テクノ株式会社製ＳＴ−０
１）からなる光触媒膜前駆体溶液をスプレー塗布し、１
００℃で３分乾燥後４５０℃で５分焼成した。その後石
原テクノ株式会社製ＳＴ−Ｋ０３を塗布乾燥したものを
試験片とした。[Example] (Preparation of test piece) Zr octylate solution and TiO 2 (ST-0 manufactured by Ishihara Techno Co., Ltd.)
Spray-coat the photocatalyst film precursor solution comprising 1)
After drying at 00 ° C for 3 minutes, it was baked at 450 ° C for 5 minutes. After that, ST-K03 manufactured by Ishihara Techno Co., Ltd. was applied and dried to obtain a test piece.
【表−１】 [Table-1]
【００１８】（実施例１）相対湿度５０％の空気中のＮ
Ｏ濃度を調整出来、ガスの流路に試験片をセット出来る
石英製のセルを有し、そのセルの上からブラックライト
を照射可能で、さらに最後にＮＯ及びＮＯ２の濃度を測
定出来る装置（化学発光方式ＮＯｘ計）を兼ね添えた流
通式ＮＯｘ分解試験装置を用い、試験片番号１を３枚重
ねたものをセルにセットし、ＮＯ濃度約１PPM、風速
０．０４ｍ、クリアランス８ｍｍに調整し、ＮＯ濃度が
安定してからからブラックライト（１ｍｍＷ）を５分間
照射し、ＮＯの分解性とＮＯ２の濃度変化を調べた。そ
の結果は表−２のとおり良好であった。Example 1 N in air at a relative humidity of 50%
A device that can adjust the O concentration, has a quartz cell that can set a test piece in the gas flow path, can irradiate black light from above the cell, and finally can measure the concentrations of NO and NO 2 ( using flow-NO x decomposition tester accompanied also serves as a chemiluminescent method NO x meter) was set in a cell that three sheets of the test pieces No. 1, NO concentration of about 1 PPM, wind speed 0.04 m, the clearance 8mm After the adjustment and the NO concentration was stabilized, black light (1 mmW) was irradiated for 5 minutes to examine the decomposability of NO and the change in NO 2 concentration. The results were good as shown in Table-2.
【００１９】（実施例２）試験片番号２を用いた以外は
実施例１と同様に試験を行った。その結果は表−２のと
おり良好で、さらに実施例１より良好であった。(Example 2) A test was conducted in the same manner as in Example 1 except that test piece number 2 was used. The results were good as shown in Table 2, and were better than Example 1.
【００２０】（実施例３）試験片番号４を３枚重ねたも
のを用いた以外は実施例１と同様に試験を行った。その
結果は表−２のとおり良好で、さらに実施例１及び実施
例２より良好であった。Example 3 A test was performed in the same manner as in Example 1 except that three test pieces No. 4 were used. The results were good as shown in Table 2, and were better than Examples 1 and 2.
【００２１】（実施例４）試験片番号１の上に試験片番
号３、４の順に３枚重ねたものを用いた以外は実施例１
と同様に試験を行った。その結果は表−２のとおり実施
例１、実施例２、実施例３より良好であった。(Example 4) Example 1 was repeated except that three specimens in the order of specimen numbers 3 and 4 were used on specimen number 1.
The test was performed in the same manner as in the above. The results were better than Examples 1, 2, and 3 as shown in Table-2.
【００２２】（実施例５）試験片番号５を用いた以外は
実施例１と同様に試験を行った。その結果は表−２のと
おり実施例３と同じ程度に良好であった。(Example 5) A test was performed in the same manner as in Example 1 except that test piece number 5 was used. The results were as good as Example 3 as shown in Table-2.
【００２３】（比較例１）実施例１と同じ流通式ＮＯｘ
分解試験装置を用い、試験片番号６によるＮＯ分解性、
およびＮＯ２の濃度変化を調べた。その結果は、表−２
のとおり、実施例１、２、３、４及び５に比べ、ＮＯ２
の減少率が明らかに劣っていた。(Comparative Example 1) Same flow type NO x as in Example 1.
Using a decomposition test apparatus, NO decomposability according to test piece number 6,
And the change in NO 2 concentration was examined. Table 2 shows the results.
As described in Examples 1, 2 , 3, 4, and 5,
Was clearly inferior.
【００２４】[0024]
【表−２】 [Table-2]
【００２５】[0025]
【発明の効果】光触媒担持体を用いるＮＯｘの分解によ
る大気の浄化に関し、光触媒膜を担持した金網を複数枚
重ねて用いることによりＮＯｘの分解効率が良く、さら
に生成するＮＯ２も極端に少なく出来ることを見出し
た。特に大都市圏の自動車交通の激しい道路周辺に於い
ては、本発明の網を道路を覆う形で敷設することによ
り、汚染空気の拡散前の浄化が期待できる。Relates air quality due to decomposition of the NO x using the photocatalyst carrier according to the present invention, good decomposition efficiency of the NO x by using a wire mesh carrying the photocatalyst film stacked plurality is, NO 2 also extremely further generates I found that I could do less. In particular, in the vicinity of roads where automobile traffic is intense in large metropolitan areas, by laying the net of the present invention so as to cover the roads, purification before diffusion of contaminated air can be expected.
Claims (5)
ラス繊維であることを特徴とする網。2. The net according to claim 1, wherein the net is made of metal or glass fiber.
るＮＯｘ分解方法。3. A NO x decomposition method which comprises using a web of claim 1 wherein.
いることを特徴とする請求項３記載のＮＯｘ分解方法。4. A molded web of claim 1 wherein, or processed to NO x decomposition method according to claim 3, wherein the use.
ことを特徴とするＮＯｘ分解方法。5. The NO x decomposition method which comprises using in the web of claim 1, wherein two or more discs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31774499A JP2001129364A (en) | 1999-11-09 | 1999-11-09 | PHOTOCATALYST CARRIER AND METHOD FOR DECOMPOSING NOx |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31774499A JP2001129364A (en) | 1999-11-09 | 1999-11-09 | PHOTOCATALYST CARRIER AND METHOD FOR DECOMPOSING NOx |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001129364A true JP2001129364A (en) | 2001-05-15 |
Family
ID=18091561
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31774499A Pending JP2001129364A (en) | 1999-11-09 | 1999-11-09 | PHOTOCATALYST CARRIER AND METHOD FOR DECOMPOSING NOx |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001129364A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009226351A (en) * | 2008-03-25 | 2009-10-08 | Panasonic Corp | Photocatalyst deodorizing machine |
| JP2010119996A (en) * | 2008-11-21 | 2010-06-03 | Osaka Univ | Visible light responsive photocatalyst composite |
| US7758821B2 (en) | 2001-07-30 | 2010-07-20 | Carrier Corporation | Modular photocatalytic air purifier |
| JP2010240053A (en) * | 2009-04-02 | 2010-10-28 | Panasonic Corp | Photocatalyst deodorizer |
-
1999
- 1999-11-09 JP JP31774499A patent/JP2001129364A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7758821B2 (en) | 2001-07-30 | 2010-07-20 | Carrier Corporation | Modular photocatalytic air purifier |
| US7951327B2 (en) | 2001-07-30 | 2011-05-31 | Carrier Corporation | Photocatalytic air purifier for a fan coil unit |
| JP2009226351A (en) * | 2008-03-25 | 2009-10-08 | Panasonic Corp | Photocatalyst deodorizing machine |
| JP2010119996A (en) * | 2008-11-21 | 2010-06-03 | Osaka Univ | Visible light responsive photocatalyst composite |
| JP2010240053A (en) * | 2009-04-02 | 2010-10-28 | Panasonic Corp | Photocatalyst deodorizer |
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