JP2003340289A - Photocatalyst composition - Google Patents
Photocatalyst compositionInfo
- Publication number
- JP2003340289A JP2003340289A JP2002158095A JP2002158095A JP2003340289A JP 2003340289 A JP2003340289 A JP 2003340289A JP 2002158095 A JP2002158095 A JP 2002158095A JP 2002158095 A JP2002158095 A JP 2002158095A JP 2003340289 A JP2003340289 A JP 2003340289A
- Authority
- JP
- Japan
- Prior art keywords
- photocatalyst
- visible light
- titanium oxide
- light responsive
- surface area
- 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 73
- 239000000203 mixture Substances 0.000 title claims abstract description 22
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 32
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 150000001450 anions Chemical class 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 239000002904 solvent Substances 0.000 claims abstract description 3
- 230000001699 photocatalysis Effects 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011787 zinc oxide Substances 0.000 abstract description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052804 chromium Inorganic materials 0.000 abstract description 2
- 239000011651 chromium Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011593 sulfur Substances 0.000 abstract description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- 229910052720 vanadium Inorganic materials 0.000 abstract description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000002950 deficient Effects 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 12
- 238000007254 oxidation reaction Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 6
- 230000004043 responsiveness Effects 0.000 description 5
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000000844 anti-bacterial effect Effects 0.000 description 3
- 230000003373 anti-fouling effect Effects 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000006864 oxidative decomposition reaction Methods 0.000 description 2
- 238000009832 plasma treatment Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- WUPHOULIZUERAE-UHFFFAOYSA-N 3-(oxolan-2-yl)propanoic acid Chemical compound OC(=O)CCC1CCCO1 WUPHOULIZUERAE-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229910052980 cadmium sulfide Inorganic materials 0.000 description 1
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は可視光によっても、
紫外光によっても高い光触媒活性を有する光触媒組成物
に関する。TECHNICAL FIELD The present invention also relates to visible light,
The present invention relates to a photocatalyst composition having a high photocatalytic activity even with ultraviolet light.
【０００２】[0002]
【従来の技術】近年、酸化チタンは、その酸化分解能、
親水化能などの光触媒作用が注目され、環境浄化、有害
物分解、汚れの分解、抗菌、防汚など様々な用途で応用
されている。しかしながら、これらの光触媒作用は紫外
光の吸収がなければ作用しないため、太陽光の当たらな
い屋内では機能せず、屋内用途には別途紫外線を放射す
る水銀ランプ、紫外線ランプなどの紫外線源を設置しな
ければならなかった。2. Description of the Related Art In recent years, titanium oxide has a
The photocatalytic action such as hydrophilicity has attracted attention and has been applied in various applications such as environmental purification, decomposition of harmful substances, decomposition of dirt, antibacterial and antifouling. However, since these photocatalytic actions do not work without absorption of ultraviolet light, they do not work indoors where the sunlight does not hit, and for indoor use a separate ultraviolet source such as a mercury lamp or ultraviolet lamp that emits ultraviolet rays is installed. I had to.
【０００３】これらの問題点を解決するため、特別な紫
外線源を必要とせず可視光によっても光触媒作用を発揮
する可視光応答性光触媒が提案され始めている。In order to solve these problems, a visible light responsive photocatalyst that does not require a special ultraviolet ray source and exhibits a photocatalytic action even by visible light has been proposed.
【０００４】例えば、特開平１１−３３３３０１号公報
に、市販の酸化チタンを水素及びメタンガスの存在する
雰囲気下プラズマ処理することにより可視光応答性を付
与する方法が提案されている。また、特開２０００−１
４０６３６号公報には、窒素ガス雰囲気下プラズマ処理
することにより可視光応答性を付与する方法が提案され
ている。しかしながらこれらの方法は高価なプラズマ処
理装置を必要とし、また一度に大量の酸化チタンを処理
できないため、工業的に有利ではなかった。For example, Japanese Patent Laid-Open No. 11-333301 proposes a method of imparting visible light responsiveness by subjecting commercially available titanium oxide to plasma treatment in an atmosphere containing hydrogen and methane gas. In addition, JP 2000-1
Japanese Patent No. 40636 proposes a method of imparting visible light responsiveness by performing plasma treatment in a nitrogen gas atmosphere. However, these methods require an expensive plasma processing apparatus and cannot process a large amount of titanium oxide at one time, which is not industrially advantageous.
【０００５】更に、特開２００１−２０７０８２号公報
には酸化チタンの微粒子をアンモニアの雰囲気下７００
℃で熱処理することにより可視光応答性を付与する方法
が提案されている。この方法は比較的大量の酸化チタン
を一度にまたは連続的に処理することを可能とするもの
で工業的に有利である。しかしながら、この方法により
製造された光触媒は可視光応答性は有するものの、酸化
チタンが本来有していた紫外光による光触媒活性が大き
く低下するという問題があった。Further, in Japanese Patent Laid-Open No. 2001-207082, fine particles of titanium oxide are treated in an ammonia atmosphere at 700
A method of imparting visible light responsiveness by heat treatment at ℃ has been proposed. This method is industrially advantageous because it allows a relatively large amount of titanium oxide to be treated at once or continuously. However, although the photocatalyst produced by this method has visible light responsiveness, there was a problem that the photocatalytic activity due to ultraviolet light, which titanium oxide originally had, was greatly reduced.
【０００６】また、これら従来の可視光応答性光触媒
は、確かに可視光により酸化分解能、親水化能などの光
触媒作用を示すものの、紫外光による光触媒活性と比較
すると、更なる活性の改善が要求されている。[0006] Although these conventional visible light-responsive photocatalysts certainly show photocatalytic activity such as oxidative decomposition and hydrophilicity by visible light, further improvement in activity is required as compared with photocatalytic activity by ultraviolet light. Has been done.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、上記のよう
な従来技術の問題点を解決し、可視光によっても、紫外
光によっても高い光触媒活性を有する光触媒組成物を提
供するものである。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art and provides a photocatalyst composition having a high photocatalytic activity both by visible light and ultraviolet light.
【０００８】[0008]
【課題を解決するための手段】本発明は、可視光によっ
ても紫外光によっても高い光触媒活性を有する、可視光
応答性光触媒と該可視光応答性光触媒より高い比表面積
を有する光触媒とを含んでなることを特徴とする光触媒
組成物に関する。The present invention comprises a visible light responsive photocatalyst having a high photocatalytic activity both by visible light and ultraviolet light and a photocatalyst having a specific surface area higher than that of the visible light responsive photocatalyst. The present invention relates to a photocatalyst composition.
【０００９】本発明で原料とする可視光応答性光触媒と
は、４００ｎｍ以上の波長の可視光によっても酸化分解
能、親水化能などの光触媒作用を示すものであり、その
構成成分としては特に限定はされないが、クロム、バナ
ジウムなどの金属を導入した金属ドープ型酸化チタン
や、プラズマ法などにより修飾処理された酸素欠陥型酸
化チタン、窒素やイオウなどのアニオンを導入したアニ
オンドープ型酸化チタンなどの酸化チタン系光触媒をは
じめ、タンタル、ニオブ、チタンなどのオキシナイトラ
イド、酸化タングステン、酸化鉄、セレン化カドミウ
ム、硫化カドミウムなどが有用に使用できる。The visible light responsive photocatalyst used as a raw material in the present invention exhibits a photocatalytic action such as an oxidative decomposition ability and a hydrophilizing ability even with visible light having a wavelength of 400 nm or more, and its constituent components are not particularly limited. Oxidation of metal-doped titanium oxide containing metals such as chromium and vanadium, oxygen-defective titanium oxide modified by plasma method, and anion-doped titanium oxide containing anions such as nitrogen and sulfur. Titanium-based photocatalysts, tantalum, niobium, oxynitrides such as titanium, tungsten oxide, iron oxide, cadmium selenide, and cadmium sulfide can be used effectively.
【００１０】例えば、窒素をドープしたアニオンドープ
型酸化チタンとしては、酸化チタンを希釈されていても
よいアンモニアガス等と接触させながら、４００〜７０
０℃で１分〜１０時間加熱することにより得ることがで
きる。但し、上記温度と加熱時間は、酸化チタンの量、
ガス濃度、ガス流量によって適宜変化させることは言う
までもない。For example, as the anion-doped titanium oxide doped with nitrogen, 400 to 70 is obtained by contacting titanium oxide with ammonia gas which may be diluted.
It can be obtained by heating at 0 ° C. for 1 minute to 10 hours. However, the above temperature and heating time are the amount of titanium oxide,
It goes without saying that it is appropriately changed depending on the gas concentration and the gas flow rate.
【００１１】上述の可視光応答性光触媒と該可視光応答
性光触媒より高い比表面積を有する光触媒を混合するこ
とにより、可視光によっても紫外光によっても高い光触
媒活性を有する光触媒組成物を得ることができる。ここ
で用いる該可視光応答性光触媒より高い比表面積を有す
る光触媒とは、原料とする可視光応答性光触媒よりも高
い比表面積を有する光触媒を指し、その構成成分として
は特に限定されないが、酸化チタン、酸化亜鉛、チタン
酸ストロンチウムなど一般的な光触媒材料が有用に使用
できる。高い表面積のものほど高い可視光活性向上効果
が得られるので、２００ｍ2／ｇを超えるような高表面
積の酸化チタンを用いることが特に望ましい。By mixing the above-mentioned visible light responsive photocatalyst with a photocatalyst having a specific surface area higher than that of the visible light responsive photocatalyst, a photocatalyst composition having a high photocatalytic activity under both visible light and ultraviolet light can be obtained. it can. The photocatalyst having a higher specific surface area than the visible light responsive photocatalyst used herein refers to a photocatalyst having a higher specific surface area than the visible light responsive photocatalyst used as a raw material, and its constituent components are not particularly limited, but titanium oxide General photocatalytic materials such as zinc oxide, zinc oxide, and strontium titanate can be usefully used. It is particularly desirable to use titanium oxide having a high surface area of more than 200 m 2 / g, because the higher the surface area, the higher the effect of improving visible light activity.
【００１２】本発明の光触媒組成物は、上述の可視光応
答性光触媒と該可視光応答性光触媒より高い比表面積を
有する光触媒を、好ましくは重量比で５：９５から９
９：１の範囲で混合することにより得ることができる。
可視光応答性光触媒の割合が５部よりも少ないと可視光
応答性を得ることができない場合があり、また９９部よ
りも多いと可視光活性を向上させる効果を得ることがで
きない場合がある。より好ましくは１０：９０から９
０：１０、さらに好ましくは１０：９０から７５：２５
の範囲で混合する。The photocatalyst composition of the present invention comprises the above-mentioned visible light responsive photocatalyst and a photocatalyst having a higher specific surface area than the visible light responsive photocatalyst, preferably in a weight ratio of 5:95 to 9.
It can be obtained by mixing in the range of 9: 1.
If the proportion of the visible light responsive photocatalyst is less than 5 parts, visible light responsiveness may not be obtained, and if it is more than 99 parts, the effect of improving visible light activity may not be obtained. More preferably 10:90 to 9
0:10, more preferably 10:90 to 75:25
Mix in the range.
【００１３】本発明の光触媒組成物は、水やアルコール
などの溶媒に分散させてコーティング剤を調製し、常法
により物品の表面に成膜することにより、可視光によっ
ても紫外光によっても高い光触媒活性を有し、屋内、屋
外を問わず、環境浄化、有害物分解、汚れの分解、抗
菌、防汚など様々な用途で有用に使用できる。The photocatalyst composition of the present invention is a photocatalyst which is high in both visible light and ultraviolet light by dispersing it in a solvent such as water or alcohol to prepare a coating agent and forming a film on the surface of an article by a conventional method. It has activity and can be used effectively in various applications such as environmental purification, decomposition of harmful substances, decomposition of dirt, antibacterial and antifouling indoors and outdoors.
【００１４】[0014]
【実施例】以下に実施例を用いて本発明をさらに詳しく
説明するが、本発明はこれら実施例のみに制限されるも
のではない。The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.
【００１５】実施例１
市販の酸化チタン（石原産業製、商品名「ＳＴ−０
１」、ＢＥＴ表面積：３００ｍ2／ｇ）１．５ｇを流速
毎分１リットルのアンモニアガス流中で６００℃１０分
間熱処理し、流速毎分１リットルの窒素ガス流中で放冷
して可視光応答性光触媒を得た。得られた可視光応答性
光触媒のＢＥＴ表面積は１０５ｍ2／ｇであった。Example 1 Commercially available titanium oxide (manufactured by Ishihara Sangyo, trade name "ST-0"
1 ”, BET surface area: 300 m 2 / g) 1.5 g was heat-treated at 600 ° C. for 10 minutes in a flow rate of 1 liter / min of ammonia gas, and was left to cool in a nitrogen gas flow of 1 liter / min of visible light. A responsive photocatalyst was obtained. The BET surface area of the obtained visible light responsive photocatalyst was 105 m 2 / g.
【００１６】この可視光応答性光触媒と高比表面積光触
媒として原料として使用した市販の酸化チタンを種々の
割合で混合し、可視光および紫外光によるＮＯ酸化反応
をおこなった結果を表１に示した。結果は１時間の反応
の間に転化されたＮＯｘの割合で示した。Table 1 shows the results obtained by mixing the visible light responsive photocatalyst with commercially available titanium oxide used as a raw material as a high specific surface area photocatalyst in various ratios and performing NO oxidation reaction with visible light and ultraviolet light. . The results are expressed as the percentage of NOx converted during the 1 hour reaction.
【００１７】ＮＯ酸化反応は、光触媒組成物５０ｍｇに
対し空気で希釈した濃度１０ｐｐｍのＮＯガスを流速毎
分０．４リットルで流通させておこなった。反応には、
紫外光源としては２７Ｗのブラックライトを、可視光源
としては２７Ｗの蛍光灯を用いた。なお、可視光による
反応では、４１０ｎｍ以下の紫外光を吸収する紫外線カ
ットフィルム（富士フィルム製、商品名「ＵＶ Ｇｕａ
ｒｄ」）により紫外線を除去した光により反応をおこな
った。反応ガスの分析は、化学発光式窒素酸化物分析計
によりおこなった。The NO oxidation reaction was carried out by circulating 50 mg of the photocatalyst composition with 10 ppm of NO gas diluted with air at a flow rate of 0.4 liters per minute. The reaction is
A 27 W black light was used as the ultraviolet light source, and a 27 W fluorescent lamp was used as the visible light source. In the reaction with visible light, an ultraviolet cut film that absorbs ultraviolet light of 410 nm or less (manufactured by Fuji Film, trade name “UV Gua
The reaction was carried out by the light obtained by removing the ultraviolet rays by "rd"). The reaction gas was analyzed by a chemiluminescence type nitrogen oxide analyzer.
【００１８】比較例１
実施例１で調製した可視光応答性光触媒単独で可視光お
よび紫外光によるＮＯ酸化反応をおこなった結果を同じ
く表１中に示した。結果は１時間の反応の間に転化され
たＮＯｘの割合で示した。Comparative Example 1 The results of NO oxidation reaction by visible light and ultraviolet light using the visible light responsive photocatalyst prepared in Example 1 alone are also shown in Table 1. The results are expressed as the percentage of NOx converted during the 1 hour reaction.
【００１９】比較例２
実施例１で調製した可視光応答性光触媒（ＢＥＴ表面
積：１０５ｍ2／ｇ）と、高比表面積光触媒に代えて可
視光応答性光触媒より表面積の低い酸化チタン（触媒学
会提供、参照触媒「ＪＲＣ−ＴＩＯ−００４」、ＢＥＴ
表面積：４９ｍ2／ｇ）を等量ずつ混合し、可視光およ
び紫外光によるＮＯ酸化反応をおこなった結果を同じく
表１中に示した。結果は１時間の反応の間に転化された
ＮＯｘの割合で示した。Comparative Example 2 The visible light responsive photocatalyst (BET surface area: 105 m 2 / g) prepared in Example 1 and titanium oxide having a surface area lower than that of the visible light responsive photocatalyst in place of the high specific surface area photocatalyst (provided by The Catalysis Society of Japan) , Reference catalyst "JRC-TIO-004", BET
A surface area: 49 m 2 / g) was mixed in equal amounts, and the results of NO oxidation reaction by visible light and ultraviolet light were also shown in Table 1. The results are expressed as the percentage of NOx converted during the 1 hour reaction.
【００２０】[0020]
【表１】
実施例２
アナターゼ型の酸化チタン（触媒学会提供、参照触媒
「ＪＲＣ−ＴＩＯ−００４」）１．５ｇを流速毎分１リ
ットルのアンモニアガス流中で６００℃１時間間熱処理
し、流速毎分１リットルの窒素ガス流中で放冷して可視
光応答性光触媒を得た。得られた可視光応答性光触媒の
ＢＥＴ表面積は４３ｍ2／ｇであった。[Table 1] Example 2 1.5 g of anatase type titanium oxide (reference catalyst “JRC-TIO-004” provided by The Society of Catalysis, Japan) was heat-treated at 600 ° C. for 1 hour in an ammonia gas flow having a flow rate of 1 liter / min, and the flow rate was 1 / min. The mixture was allowed to cool in a stream of nitrogen gas to obtain a visible light responsive photocatalyst. The BET surface area of the obtained visible light responsive photocatalyst was 43 m 2 / g.
【００２１】この可視光応答性光触媒と高比表面積光触
媒として市販の酸化チタン（石原産業製、商品名「ＳＴ
−０１」、ＢＥＴ表面積：３００ｍ2／ｇ）を等量ずつ
混合し、可視光および紫外光によるＮＯ酸化反応をおこ
なった結果を表２に示した。結果は１時間の反応の間に
転化されたＮＯｘの割合で示した。This visible light responsive photocatalyst and commercially available titanium oxide as a high specific surface area photocatalyst (made by Ishihara Sangyo, trade name "ST
-01 ", BET surface area: 300 m 2 / g) were mixed in equal amounts, and the NO oxidation reaction by visible light and ultraviolet light was performed. The results are shown in Table 2. The results are expressed as the percentage of NOx converted during the 1 hour reaction.
【００２２】実施例３
ルチル型の酸化チタン（触媒学会提供、参照触媒「ＪＲ
Ｃ−ＴＩＯ−００３」）１．５ｇを流速毎分１リットル
のアンモニアガス流中で６００℃１時間間熱処理し、流
速毎分１リットルの窒素ガス流中で放冷して可視光応答
性光触媒を得た。得られた可視光応答性光触媒のＢＥＴ
表面積は４５ｍ2／ｇであった。Example 3 Rutile type titanium oxide (provided by the Society of Catalysis, Reference catalyst "JR
C-TIO-003 ") (1.5 g) was heat-treated in a flow of 1 liter / min of ammonia gas at 600 ° C. for 1 hour, and allowed to cool in a flow of 1 liter / min of nitrogen gas, and a visible light responsive photocatalyst. Got BET of the obtained visible light responsive photocatalyst
The surface area was 45 m 2 / g.
【００２３】この可視光応答性光触媒と高比表面積光触
媒として市販の酸化チタン（石原産業製、商品名「ＳＴ
−０１」、ＢＥＴ表面積：３００ｍ2／ｇ）を等量ずつ
混合し、可視光および紫外光によるＮＯ酸化反応をおこ
なった結果を同じく表２中に示した。結果は１時間の反
応の間に転化されたＮＯｘの割合で示した。This visible light responsive photocatalyst and commercially available titanium oxide as a high specific surface area photocatalyst (made by Ishihara Sangyo, trade name "ST
-01 ", BET surface area: 300 m 2 / g) were mixed in equal amounts, and the results of NO oxidation reaction with visible light and ultraviolet light are also shown in Table 2. The results are expressed as the percentage of NOx converted during the 1 hour reaction.
【００２４】比較例３
実施例２で調製した可視光応答性光触媒単独で可視光お
よび紫外光によるＮＯ酸化反応をおこなった結果を同じ
く表２中に示した。結果は１時間の反応の間に転化され
たＮＯｘの割合で示した。Comparative Example 3 The results of NO oxidation reaction by visible light and ultraviolet light using the visible light responsive photocatalyst prepared in Example 2 alone are also shown in Table 2. The results are expressed as the percentage of NOx converted during the 1 hour reaction.
【００２５】比較例４
実施例３で調製した可視光応答性光触媒単独で可視光お
よび紫外光によるＮＯ酸化反応をおこなった結果を同じ
く表２中に示した。結果は１時間の反応の間に転化され
たＮＯｘの割合で示した。Comparative Example 4 The results of NO oxidation reaction by visible light and ultraviolet light using the visible light responsive photocatalyst prepared in Example 3 alone are also shown in Table 2. The results are expressed as the percentage of NOx converted during the 1 hour reaction.
【００２６】[0026]
【表２】 [Table 2]
【発明の効果】表１，２および図１，２より明らかなよ
うに、本発明の光触媒組成物は、紫外光反応において
も、可視光反応においても、原料可視光応答性光触媒を
単独で用いるよりも顕著に高い活性を示した。As is clear from Tables 1 and 2 and FIGS. 1 and 2, the raw material visible light responsive photocatalyst is used alone in the photocatalyst composition of the present invention in both the ultraviolet light reaction and the visible light reaction. It showed significantly higher activity.
【００２７】以上のように、本発明の光触媒組成物は可
視光によっても紫外光によっても高い光触媒活性を有
し、屋内、屋外を問わず、環境浄化、有害物分解、汚れ
の分解、抗菌、防汚など様々な用途で有用に使用でき
る。As described above, the photocatalyst composition of the present invention has a high photocatalytic activity under both visible light and ultraviolet light, and can be used for environmental purification, decomposition of harmful substances, decomposition of stains, antibacterial property, whether indoors or outdoors. It can be usefully used in various applications such as antifouling.
【図１】 実施例１および比較例１，２で得た可視光応
答性光触媒のＮＯ酸化反応の結果を示す図である。FIG. 1 is a diagram showing results of NO oxidation reaction of visible light responsive photocatalysts obtained in Example 1 and Comparative Examples 1 and 2.
【図２】 実施例２，３および比較例３，４で得た可視
光応答性光触媒のＮＯ酸化反応の結果を示す図である。FIG. 2 is a diagram showing results of NO oxidation reaction of visible light responsive photocatalysts obtained in Examples 2 and 3 and Comparative Examples 3 and 4.
Claims (7)
触媒より高い比表面積を有する光触媒とを含んでなる光
触媒組成物。1. A photocatalyst composition comprising a visible light responsive photocatalyst and a photocatalyst having a higher specific surface area than the visible light responsive photocatalyst.
触媒より高い比表面積を有する光触媒の割合が重量比で
５：９５から９９：１の範囲にある請求項１に記載の光
触媒組成物。2. The photocatalyst composition according to claim 1, wherein the weight ratio of the visible light responsive photocatalyst to the photocatalyst having a higher specific surface area than the visible light responsive photocatalyst is in the range of 5:95 to 99: 1. .
媒である請求項１または請求項２に記載の光触媒組成
物。3. The photocatalyst composition according to claim 1, wherein the visible light responsive photocatalyst is a titanium oxide photocatalyst.
したアニオンドープ型酸化チタンである請求項３に記載
の光触媒組成物。4. The photocatalyst composition according to claim 3, wherein the titanium oxide photocatalyst is an anion-doped titanium oxide into which an anion has been introduced.
触媒組成物。5. The photocatalyst composition according to claim 4, wherein the anion is nitrogen.
ンである請求項１〜５の何れかに記載の光触媒組成物。6. The photocatalyst composition according to claim 1, wherein the photocatalyst having a high specific surface area is titanium oxide.
記載の光触媒組成物を分散させてなるコーティング剤。7. A coating agent obtained by dispersing the photocatalyst composition according to any one of claims 1 to 6 in a solvent.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005089941A1 (en) | 2004-03-18 | 2005-09-29 | Patent Technology Development Inc. | Novel photocatalyst and method for producing same |
| JP2006218411A (en) * | 2005-02-10 | 2006-08-24 | Sumitomo Seika Chem Co Ltd | Nitrogen-doped titanium oxide having photocatalyst action and its production method |
| JP2010179285A (en) * | 2009-02-09 | 2010-08-19 | Catarise Corp | Photocatalyst, photocatalyst carrier, and photocatalyst kit |
| TWI494159B (en) * | 2012-11-02 | 2015-08-01 | Ind Tech Res Inst | Photocatalyst material and method for fabricating the same |
| US9203052B2 (en) | 2009-11-18 | 2015-12-01 | Samsung Display Co., Ltd. | Organic light emitting diode display and method of manufacturing the same |
| WO2016005760A1 (en) * | 2014-07-11 | 2016-01-14 | University Court Of The University Of Aberdeen | A method of photocatalytically oxidising nitrogen oxides |
| US20160302422A1 (en) * | 2011-05-04 | 2016-10-20 | WELL Shield LLC | Titanium Dioxide Photocatalytic Compositions and Uses Thereof |
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2002
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005089941A1 (en) | 2004-03-18 | 2005-09-29 | Patent Technology Development Inc. | Novel photocatalyst and method for producing same |
| US8404616B2 (en) | 2004-03-18 | 2013-03-26 | Patent Technology Development Inc. | Photocatalyst and method for producing same |
| JP2006218411A (en) * | 2005-02-10 | 2006-08-24 | Sumitomo Seika Chem Co Ltd | Nitrogen-doped titanium oxide having photocatalyst action and its production method |
| JP4587831B2 (en) * | 2005-02-10 | 2010-11-24 | 住友精化株式会社 | Nitrogen-doped titanium oxide having photocatalytic action and method for producing the same |
| JP2010179285A (en) * | 2009-02-09 | 2010-08-19 | Catarise Corp | Photocatalyst, photocatalyst carrier, and photocatalyst kit |
| US9203052B2 (en) | 2009-11-18 | 2015-12-01 | Samsung Display Co., Ltd. | Organic light emitting diode display and method of manufacturing the same |
| US20160302422A1 (en) * | 2011-05-04 | 2016-10-20 | WELL Shield LLC | Titanium Dioxide Photocatalytic Compositions and Uses Thereof |
| US9833003B2 (en) * | 2011-05-04 | 2017-12-05 | WELL Shield LLC | Titanium dioxide photocatalytic compositions and uses thereof |
| TWI494159B (en) * | 2012-11-02 | 2015-08-01 | Ind Tech Res Inst | Photocatalyst material and method for fabricating the same |
| US9724675B2 (en) | 2012-11-02 | 2017-08-08 | Industrial Technology Research Institute | Photocatalyst material and method for fabricating the same |
| WO2016005760A1 (en) * | 2014-07-11 | 2016-01-14 | University Court Of The University Of Aberdeen | A method of photocatalytically oxidising nitrogen oxides |
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