JPH0966238A - Inorganic granular material and its manufacture - Google Patents
Inorganic granular material and its manufactureInfo
- Publication number
- JPH0966238A JPH0966238A JP7226264A JP22626495A JPH0966238A JP H0966238 A JPH0966238 A JP H0966238A JP 7226264 A JP7226264 A JP 7226264A JP 22626495 A JP22626495 A JP 22626495A JP H0966238 A JPH0966238 A JP H0966238A
- Authority
- JP
- Japan
- Prior art keywords
- matrix
- powder
- inorganic
- photocatalytic activity
- substance
- 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.)
- Granted
Links
- 239000008187 granular material Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000011159 matrix material Substances 0.000 claims abstract description 54
- 239000000843 powder Substances 0.000 claims abstract description 50
- 239000000126 substance Substances 0.000 claims abstract description 36
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000001699 photocatalysis Effects 0.000 claims description 50
- 239000011236 particulate material Substances 0.000 claims description 20
- 239000011148 porous material Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 15
- 239000004408 titanium dioxide Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 5
- 239000011941 photocatalyst Substances 0.000 abstract description 25
- 239000011230 binding agent Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 11
- 230000002401 inhibitory effect Effects 0.000 abstract description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 19
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 238000002156 mixing Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000001569 carbon dioxide Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 229910052763 palladium Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004332 deodorization Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000003100 immobilizing effect Effects 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000013032 photocatalytic reaction Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000000843 anti-fungal effect Effects 0.000 description 1
- 229940121375 antifungal agent Drugs 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 1
- -1 iron ions Chemical class 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 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
- 239000006072 paste Substances 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Catalysts (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、光触媒活性を有す
る材料に関し、詳しくは、低コストで安定な無機バイン
ダーを用いて光触媒活性を有する物質を固定してなる光
触媒活性を有する無機粒状材料及びその製造方法に関す
る。TECHNICAL FIELD The present invention relates to a material having photocatalytic activity, and more specifically, to an inorganic particulate material having photocatalytic activity obtained by fixing a substance having photocatalytic activity using a low-cost and stable inorganic binder. It relates to a manufacturing method.
【０００２】[0002]
【従来の技術】近年、光の照射によって強い酸化能を発
現する光触媒活性を有する無機材料が注目されており、
この酸化能がもたらす、有害な有機物質の分解、殺菌、
防黴、脱臭などの特性を利用した種々の応用が検討され
ている。この光触媒活性を有する物質（以下、適宜光触
媒と称する）の代表的なものは二酸化チタン（Ｔｉ
Ｏ2）であり、最も広く使用されている。この光触媒活
性を有する二酸化チタン粉体を使用する場合、粉体の形
態ではハンドリングが良好とは言い難く、これを基材に
固定化して使用することが一般的である。2. Description of the Related Art In recent years, an inorganic material having a photocatalytic activity, which exhibits a strong oxidizing ability when irradiated with light, has been attracting attention.
Degradation and sterilization of harmful organic substances brought about by this oxidizing ability
Various applications utilizing properties such as mildew proof and deodorization are being studied. A typical substance having this photocatalytic activity (hereinafter, appropriately referred to as a photocatalyst) is titanium dioxide (Ti
O 2 ) and is the most widely used. When this titanium dioxide powder having photocatalytic activity is used, it is difficult to say that handling is good in the form of powder, and it is common to use it after fixing it to a substrate.
【０００３】二酸化チタン粉体の固定化には、例えば、
以下の方法が採用されている。 （１）ガラス、タイル等の基材上に塗布し、ＴｉＯ2 の
焼結膜を形成する。 （２）バインダーマトリックス中に混入して材料表面に
塗布する。For immobilization of titanium dioxide powder, for example,
The following methods are adopted. (1) Coating on a substrate such as glass or tile to form a TiO 2 sintered film. (2) It is mixed in the binder matrix and applied on the surface of the material.
【０００４】焼結膜を形成する場合、強固で耐久性の高
い膜が得られるが、焼成に数百度の高温条件を必要とす
るため、基材がガラス、タイル等の耐熱性材料に限定さ
れ、さらに、高温の加熱を要するため、現場施工や現場
での補修ができないという問題点があった。When a sintered film is formed, a strong and highly durable film can be obtained. However, since the baking requires high temperature conditions of several hundreds of degrees, the base material is limited to a heat resistant material such as glass or tile. Further, there is a problem in that on-site construction and on-site repair cannot be performed because high temperature heating is required.
【０００５】一方、バインダー中に二酸化チタン粉体を
混入して塗布する場合は、現場施工が可能で補修も容易
である。しかし、光触媒活性は対象物と直接接触する際
にその機能を発現しうるものであり、バインダーが光触
媒の表面を被覆すると光触媒活性の利用が阻害され、特
に、光触媒表面が無機物で覆われると光触媒活性の利用
は著しく阻害されることが知られている。また、バイン
ダーマトリックスが高分子樹脂の如き有機物の場合、光
触媒活性の強い酸化作用によって有機物自体が損傷を受
け、バインダーの耐久性が著しく低下し、従って、光触
媒を安定に担持させることができないという問題があっ
た。On the other hand, when titanium dioxide powder is mixed in the binder and applied, on-site construction is possible and repair is easy. However, the photocatalytic activity can exhibit its function when it comes into direct contact with an object. When the surface of the photocatalyst is coated with a binder, the utilization of the photocatalytic activity is hindered. It is known that utilization of activity is significantly inhibited. In addition, when the binder matrix is an organic substance such as a polymer resin, the organic substance itself is damaged by the strong oxidizing action of the photocatalytic activity, and the durability of the binder is remarkably reduced, so that the photocatalyst cannot be stably supported. was there.
【０００６】セメント系の無機マトリックス、例えば、
セメントペースト、モルタル、コンクリートなどは、光
触媒活性を有するＴｉＯ2 粉体のバインダーとして用い
うる低コストで安全な無機材料である。しかしながら、
セメント水和物が光触媒表面を覆って光活性の利用を阻
害するという前記問題のみならず、セメントマトリック
ス中の水酸化カルシウム（Ｃａ（ＯＨ）2 ）が溶出し
て、空気中の炭酸ガス（ＣＯ2 ）と反応し、不溶性の炭
酸カルシウム（ＣａＣＯ3 ）を生成するという問題があ
り、生成した炭酸カルシウムの層が表面に露出した光触
媒粉体の表面をも被覆し、光触媒活性の利用をさらに阻
害する現象もみられた。Cement-based inorganic matrix, such as
Cement paste, mortar, concrete and the like are low-cost and safe inorganic materials that can be used as a binder for TiO 2 powder having photocatalytic activity. However,
Not only the above-mentioned problem that the cement hydrate covers the photocatalyst surface and inhibits the utilization of photoactivity, but also calcium hydroxide (Ca (OH) 2 ) in the cement matrix is eluted and carbon dioxide gas (CO There is a problem that it reacts with 2 ) to form insoluble calcium carbonate (CaCO 3 ), and the layer of the formed calcium carbonate also covers the surface of the photocatalyst powder exposed on the surface, further hindering the utilization of photocatalytic activity. There was also a phenomenon.
【０００７】[0007]
【発明が解決しようとする課題】従って、本発明の目的
は、光触媒活性を阻害することなく、光触媒活性を有す
る物質を安定に固定化しうる、低コストで耐久性に優れ
た無機バインダーを用いた光触媒活性を有する無機粒状
材料及びその簡単な製造方法を提供することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to use a low-cost and highly durable inorganic binder capable of stably immobilizing a substance having a photocatalytic activity without inhibiting the photocatalytic activity. An object of the present invention is to provide an inorganic particulate material having photocatalytic activity and a simple manufacturing method thereof.
【０００８】[0008]
【課題を解決するための手段】本発明者らは鋭意検討の
結果、低コストで安定な無機バインダーに光触媒活性を
有する物質の粒子を固定化してなる無機粒状材料によ
り、前記課題を解決し得ることを見出し、本発明を完成
した。即ち、 （１）本発明の無機粒状材料は、光触媒活性を有する物
質の粉体を、該粉体表面の少なくとも一部が露出するよ
うに無機多孔質体マトリックス中に固定してなることを
特徴とする。Means for Solving the Problems As a result of intensive investigations by the present inventors, the above-mentioned problems can be solved by an inorganic particulate material obtained by immobilizing particles of a substance having photocatalytic activity in a low-cost and stable inorganic binder. It was found that the present invention has been completed. That is, (1) the inorganic particulate material of the present invention is characterized in that powder of a substance having photocatalytic activity is fixed in an inorganic porous material matrix so that at least a part of the surface of the powder is exposed. And
【０００９】（２）本発明の請求項２記載の無機粒状材
料は、前記（１）に記載の粒状材料であって、前記光触
媒活性を有する物質が、二酸化チタンであることを特徴
とする。(2) The inorganic granular material according to claim 2 of the present invention is the granular material according to (1) above, wherein the photocatalytically active substance is titanium dioxide.
【００１０】（３）本発明の請求項３記載の無機粒状材
料は、前記（１）に記載の粒状材料であって、前記光触
媒活性を有する物質の粉体の平均粒径が０．１〜１０μ
ｍであることを特徴とする。(3) The inorganic granular material according to claim 3 of the present invention is the granular material according to (1), wherein the powder of the substance having photocatalytic activity has an average particle diameter of 0.1 to 0.1. 10μ
It is characterized by being m.
【００１１】（４）本発明の請求項４記載の無機粒状材
料は、前記（１）乃至（３）に記載の粒状材料であっ
て、前記光触媒活性を有する物質の粉体が、無機多孔質
体マトリックス中に１〜２００重量％含まれることを特
徴とする。(4) The inorganic granular material according to claim 4 of the present invention is the granular material according to (1) to (3), wherein the powder of the substance having photocatalytic activity is an inorganic porous material. It is characterized in that it is contained in the body matrix in an amount of 1 to 200% by weight.
【００１２】（５）本発明の請求項５記載の無機粒状材
料の製造方法は、無機多孔質体マトリックス中に、光触
媒活性を有する物質の粉体を均一に分散した後、該マト
リックスを硬化し、硬化したマトリックスを該光触媒活
性を有する物質の粉体表面の少なくとも一部が露出する
ように破砕する、ことを特徴とする。(5) In the method for producing an inorganic particulate material according to claim 5 of the present invention, a powder of a substance having photocatalytic activity is uniformly dispersed in an inorganic porous material matrix, and then the matrix is cured. The cured matrix is crushed so that at least a part of the powder surface of the substance having photocatalytic activity is exposed.
【００１３】[0013]
【発明の実施の形態】図１は、本発明の無機粒状材料の
一態様を示す概略断面図である。無機粒状材料１０は、
無機多孔質体マトリックス１２中に光触媒活性を有する
物質の粉体１４が分散、固定化されて構成されており、
無機多孔質体マトリックス１２表面に光触媒粉体１４が
一部その表面が露出して固定化されている。1 is a schematic sectional view showing an embodiment of an inorganic particulate material of the present invention. The inorganic granular material 10 is
A powder 14 of a substance having photocatalytic activity is dispersed and fixed in an inorganic porous material matrix 12,
Part of the surface of the photocatalyst powder 14 is exposed and fixed on the surface of the inorganic porous material matrix 12.
【００１４】本発明において、光触媒活性を有する物質
としては、公知の、例えば、特公平２−９８５０号の記
載の如き物質が挙げられ、特に、二酸化チタン、酸化
鉄、酸化タングステン、酸化亜鉛、チタン酸ストロンチ
ウム等が広く知られている。これらのうち、光触媒活性
効果、安全性及びコストの観点から二酸化チタンが好ま
しい。また、これら光触媒活性を有する物質の光触媒活
性を向上させるために、これらと共存して、光触媒反応
において還元反応サイトになりうる金属、例えば、白
金、金、パラジウム、銀、銅、ニッケル、コバルトから
なる群から選択される金属を併用することもできる。こ
れらのうち、効果の点からは白金、金、パラジウム、銀
が好ましく、加工の容易さ、コストの観点からパラジウ
ムが特に好ましい。In the present invention, examples of the substance having photocatalytic activity include known substances such as those described in Japanese Patent Publication No. 2-9850, particularly titanium dioxide, iron oxide, tungsten oxide, zinc oxide, titanium. Strontium acid and the like are widely known. Of these, titanium dioxide is preferred from the viewpoints of photocatalytic activity effect, safety and cost. Further, in order to improve the photocatalytic activity of these substances having photocatalytic activity, a metal that can coexist with these and serve as a reduction reaction site in the photocatalytic reaction, for example, platinum, gold, palladium, silver, copper, nickel, cobalt It is also possible to use a metal selected from the group consisting of: Among these, platinum, gold, palladium, and silver are preferable from the viewpoint of effect, and palladium is particularly preferable from the viewpoint of ease of processing and cost.
【００１５】光触媒活性を有する物質の粉体の粒径は、
特に制限はないが、効果とコストとのバランスから０．
１〜１０μｍであることが好ましく、１〜５μｍである
ことが特に好ましい。The particle size of the powder of the substance having photocatalytic activity is
There is no particular limitation, but the balance between the effect and the cost is 0.
It is preferably 1 to 10 μm, and particularly preferably 1 to 5 μm.
【００１６】また、本発明における無機多孔質体マトリ
ックスとしては、コンクリート、モルタル、セメントペ
ースト等のセメント系マトリックス、石膏、ケイ酸カル
シウム等の組織内に微細な空孔を多数有するマトリック
スが挙げられ、コスト及び安定性の観点からセメント系
マトリックスが好ましい。Examples of the inorganic porous material matrix in the present invention include cement-based matrices such as concrete, mortar and cement paste, and matrices such as gypsum and calcium silicate having a large number of fine pores in the structure, A cement-based matrix is preferable from the viewpoint of cost and stability.
【００１７】光触媒粉体の混入量は、マトリックスの１
〜２００重量％であることが好ましく、１０〜３０重量
％であることがさらに好ましい。１重量％未満であると
得られる無機粒状材料の光触媒活性効果が不充分であ
り、２００重量％を超えると無機粒状材料のマトリック
ス強度が低下し、いずれも好ましくない。The amount of the photocatalyst powder mixed is 1 for the matrix.
It is preferably ˜200 wt%, and more preferably 10 to 30 wt%. If it is less than 1% by weight, the photocatalytic activity effect of the obtained inorganic granular material is insufficient, and if it exceeds 200% by weight, the matrix strength of the inorganic granular material is lowered, which is not preferable.
【００１８】セメント系マトリックスを使用する場合、
前記した炭酸カルシウムによる光触媒反応阻害を抑制す
るために、以下の方法を単独または組み合わせで使用す
ることが好ましい。If a cementitious matrix is used,
In order to suppress the above-mentioned inhibition of photocatalytic reaction by calcium carbonate, it is preferable to use the following methods alone or in combination.
【００１９】（ａ）炭酸ガスを用いた中性化の促進：高
濃度の炭酸ガス雰囲気中にセメント硬化体を置き、セメ
ントマトリックス中の水酸化カルシウムが光触媒の粒子
表面に溶出する前に中性化させる。炭酸ガス濃度が高い
ほど、雰囲気温度が高いほど中性化速度は大きくなるの
で、セメント硬化体の大きさに応じて適当な条件を設定
する。（ｂ）オートクレイブによる水和反応促進：高
温、高圧の飽和蒸気中にセメント硬化体を置き、セメン
トと水の反応（水和）を促進し、未水和のセメント分
〔水酸化カルシウム（Ｃａ（ＯＨ）2 ）が主成分〕を少
なくする。(A) Acceleration of neutralization using carbon dioxide gas: A hardened cement material is placed in a high-concentration carbon dioxide gas atmosphere and neutralized before calcium hydroxide in the cement matrix elutes on the surface of the photocatalyst particles. Turn into The higher the carbon dioxide concentration and the higher the ambient temperature, the higher the neutralization rate. Therefore, appropriate conditions are set according to the size of the hardened cement. (B) Acceleration of hydration reaction by autoclave: Place the hardened cement in saturated steam at high temperature and high pressure to accelerate the reaction (hydration) of cement and water, and to remove unhydrated cement component [calcium hydroxide (Ca (OH) 2 ) is the main component].
【００２０】さらに、光触媒活性を向上させるために、
マトリックス中にアルミ粉等の起泡剤、ガラス繊維等を
添加することができる。これらの物質をマトリックス中
に添加することによりマトリックス中により大きな面積
の空孔が形成され、図１に示した如き無機粒状材料のそ
れよりも表面積（反応面積、受光面積）が増加してお
り、光触媒活性効率がより向上する。Further, in order to improve the photocatalytic activity,
A foaming agent such as aluminum powder, glass fiber or the like can be added to the matrix. By adding these substances into the matrix, pores having a larger area are formed in the matrix, and the surface area (reaction area, light receiving area) is larger than that of the inorganic granular material as shown in FIG. The photocatalytic activity efficiency is further improved.
【００２１】図２は、無機多孔質マトリックス内に空孔
が形成されている無機粒状材料を示す概略断面図であ
る。この態様においては無機粒状材料１６を構成するマ
トリックス１８は発泡剤を混入して形成されており、光
触媒活性を有する物質の粉体１４がマトリックス１８表
面に露出して固定化されている。発泡剤を混入して形成
されたマトリックス１８中には大きな気泡（空孔）２０
が形成されているため、マトリックス１８の表面積が増
加し、表面に露出して固定化された光触媒粉体１４も多
くなり、受光面積も増加することから、光触媒活性効率
が向上することがわかる。FIG. 2 is a schematic cross-sectional view showing an inorganic granular material in which pores are formed in the inorganic porous matrix. In this embodiment, the matrix 18 constituting the inorganic granular material 16 is formed by mixing a foaming agent, and the powder 14 of the substance having photocatalytic activity is exposed and fixed on the surface of the matrix 18. Large bubbles (pores) 20 are present in the matrix 18 formed by mixing the foaming agent.
Since the matrix 18 is formed, the surface area of the matrix 18 is increased, the amount of the photocatalyst powder 14 exposed and immobilized on the surface is also increased, and the light receiving area is also increased, which shows that the photocatalytic activity efficiency is improved.
【００２２】さらに、塩化鉄、鉄粉等を原料のセメント
粉体または練混水に添加し、二酸化チタン等の光触媒活
性を有する物質粉体に鉄イオン等を吸着させることも、
光触媒活性効率の向上の観点から有効である。Further, iron chloride, iron powder, etc. may be added to the raw material cement powder or kneading water to adsorb iron ions etc. to the substance powder having photocatalytic activity such as titanium dioxide.
It is effective from the viewpoint of improving the photocatalytic activity efficiency.
【００２３】次に、前記無機粒状材料の製造方法につい
て説明する。本発明の無機粒状材料の製造方法は、
（ａ）無機多孔質体マトリックス中に、光触媒活性を有
する物質の粉体を均一に分散した後、（ｂ）該マトリッ
クスを硬化し、（ｃ）硬化したマトリックスを該光触媒
活性を有する物質の粉体表面の少なくとも一部が露出す
るように破砕する、ことを特徴とするものである。Next, a method for producing the inorganic particulate material will be described. The method for producing an inorganic particulate material of the present invention,
(A) A powder of a substance having a photocatalytic activity is uniformly dispersed in an inorganic porous material matrix, (b) the matrix is cured, and (c) a cured matrix is a powder of the substance having a photocatalytic activity. It is characterized by crushing so that at least a part of the body surface is exposed.
【００２４】無機多孔質体マトリックスに二酸化チタン
粉体等の光触媒粉体をマトリックス量に対して好ましく
は１〜２００重量％混合する。無機多孔質体マトリック
ス中に、光触媒粉体を均一に分散する方法としては、例
えば、セメントに混合して使用する場合には、マトリッ
クスの粉体原料であるセメント配合物に光触媒粉体を配
合して、ミキシングミル等で十分に混合し、水を加えて
混練りする方法、セメント配合物に水を添加してなる硬
化前のマトリックスに光触媒粉体を配合してよく混合す
る方法などが挙げられる。分散時に混練・成型に必要な
流動性を得るために、セメント配合剤として公知の減水
剤、流動化剤などの化学混和剤を必要に応じて使用する
ことができる。A photocatalyst powder such as titanium dioxide powder is mixed with the inorganic porous material matrix preferably in an amount of 1 to 200% by weight based on the amount of the matrix. As a method for uniformly dispersing the photocatalyst powder in the inorganic porous material matrix, for example, when the photocatalyst powder is mixed with cement and used, the photocatalyst powder is blended with the cement mixture which is the powder raw material of the matrix. A method of thoroughly mixing with a mixing mill or the like and adding water to knead, a method of adding photocatalyst powder to a matrix before curing formed by adding water to a cement mixture and thoroughly mixing them. . In order to obtain the fluidity required for kneading and molding during dispersion, a chemical admixture known as a cement compounding agent, such as a water reducing agent or a fluidizing agent, can be used if necessary.
【００２５】二酸化チタン粉体などの光触媒粉体を均一
に混合したマトリックスを適当な型枠内で硬化し、その
後、適当な大きさ、好ましくは平均径２０ｃｍ以下、に
破砕し、無機粒状材料を得ることができる。この無機粒
状材料は破砕面において二酸化チタン粉体等の光触媒粉
体がセメントマトリックスで覆われず、マトリックス表
面に露出している。A matrix in which a photocatalyst powder such as titanium dioxide powder is uniformly mixed is hardened in an appropriate mold, and then crushed to an appropriate size, preferably an average diameter of 20 cm or less to obtain an inorganic particulate material. Obtainable. In this crushed surface of the inorganic granular material, the photocatalyst powder such as titanium dioxide powder is not covered with the cement matrix and is exposed on the surface of the matrix.
【００２６】無機粒状材料の大きさは、その使用目的に
より任意に選択することができ、破砕条件を調製するこ
とにより、所望の大きさの無機粒状材料を調製すること
ができる。光触媒粉体を混入したマトリックス硬化体の
破砕は、ジョークラッシャー、インペラブレーカー等の
公知の機械的方法によって行うことができる。The size of the inorganic granular material can be arbitrarily selected according to the purpose of use, and the desired size of the inorganic granular material can be prepared by adjusting the crushing conditions. The crushing of the matrix hardened material mixed with the photocatalyst powder can be performed by a known mechanical method such as a jaw crusher or an impeller breaker.
【００２７】かくして得られた無機粒状材料は、そのま
まで骨材などの光触媒活性を有する建築材料、水処理材
等として用いることができる。本発明の無機粒状材料
は、マトリックス全体に光触媒活性を有する物質の粉体
が均一に分散しているため、通常の条件で破砕すれば破
砕面に粉体が露出し、さらに、該粉体が露出している無
機粒状材料のマトリックス表面が摩耗、損傷を受けて
も、光触媒活性は低下しないという利点を有する。The inorganic particulate material thus obtained can be used as it is as a building material having photocatalytic activity such as an aggregate, a water treatment material and the like. In the inorganic particulate material of the present invention, since the powder of the substance having photocatalytic activity is uniformly dispersed in the entire matrix, the powder is exposed on the crushed surface when crushed under normal conditions. It has the advantage that the photocatalytic activity does not decrease even if the exposed matrix surface of the inorganic particulate material is worn or damaged.
【００２８】さらに、多孔質マトリックスは組織内に微
細な空孔が多数存在し、吸着機能を有していることか
ら、光触媒活性を有する物質粉体の近傍に被処理物質を
吸着することにより、光触媒活性の利用の高効率化が可
能となる。Furthermore, since the porous matrix has a large number of fine pores in the tissue and has an adsorption function, by adsorbing the substance to be treated in the vicinity of the substance powder having photocatalytic activity, It is possible to increase the efficiency of utilization of photocatalytic activity.
【００２９】さらに、本発明の無機粒状材料は、適切な
樹脂系又は無機系バインダーに配合するか、バインダー
を下地に塗布した後に吹き付けることによって、光触媒
活性を有する塗材として用いることができる。Furthermore, the inorganic particulate material of the present invention can be used as a coating material having photocatalytic activity by blending it with a suitable resin-based or inorganic-based binder or by spraying the binder after coating it on the underlayer.
【００３０】図３は、本発明の無機粒状材料を塗材とし
て下地に適用した状態を示す概略断面図である。下地２
２上にバインダー層２４をバインダー材料を塗布するこ
とによって設け、そこに無機粒状材料１０を吹き付けて
固定する。塗材として用いた場合、光触媒粉体がマトリ
ックスに担持されており、粉体を直接塗材バインダーに
配合する場合に比べて、バインダーへの影響が少なく、
バインダーの劣化に起因する変色、退色が起こりにくく
塗材の耐久性が向上するという利点を有する。FIG. 3 is a schematic sectional view showing a state in which the inorganic granular material of the present invention is applied as a coating material to a base. Base 2
A binder layer 24 is provided on the surface 2 by applying a binder material, and the inorganic particulate material 10 is sprayed and fixed there. When used as a coating material, the photocatalyst powder is supported on the matrix, and the effect on the binder is less than in the case of directly blending the powder with the coating material binder,
It has an advantage that the discoloration and fading due to the deterioration of the binder hardly occur and the durability of the coating material is improved.
【００３１】本発明は、光触媒技術が適用されるすべて
の分野において利用可能であるが、例えば、防黴、防
汚、殺菌、脱臭等の機能を有する建築材料、建築用内外
装塗料、水中の有害物質の分解除去機能を有する水処理
材等が挙げられる。INDUSTRIAL APPLICABILITY The present invention can be used in all fields to which photocatalyst technology is applied. For example, a building material having functions of antifungal, antifouling, sterilization, deodorization, interior / exterior coating for building, Examples include water treatment materials having a function of decomposing and removing harmful substances.
【００３２】[0032]
【発明の効果】本発明の無機粒状材料は、前記構成とし
たため、光触媒活性を阻害することなく、光触媒活性を
有する物質を安定に固定化することができ、低コストで
耐久性に優れた光触媒活性材料を得ることができ、ま
た、本発明の製造方法によれば、光触媒活性を有する無
機粒状材料を簡単に製造することができる。EFFECT OF THE INVENTION Since the inorganic particulate material of the present invention has the above constitution, it can stably immobilize a substance having a photocatalytic activity without inhibiting the photocatalytic activity, and a photocatalyst excellent in durability and low cost. An active material can be obtained, and according to the production method of the present invention, an inorganic particulate material having photocatalytic activity can be easily produced.
【図１】本発明の無機粒状材料の一態様を示す概略断面
図である。FIG. 1 is a schematic cross-sectional view showing one embodiment of an inorganic particulate material of the present invention.
【図２】無機多孔質マトリックス内に空孔が形成されて
いる無機粒状材料を示す概略断面図である。FIG. 2 is a schematic cross-sectional view showing an inorganic particulate material in which pores are formed in an inorganic porous matrix.
【図３】無機粒状材料を塗材として下地に適用した状態
を示す概略断面図である。FIG. 3 is a schematic cross-sectional view showing a state in which an inorganic granular material is applied as a coating material to a base.
１０ 無機粒状材料 １２ 無機多孔質体マトリックス １４ 光触媒活性を有する物質の粉体 １６ 無機粒状材料 １８ 無機多孔質体マトリックス 10 Inorganic Granular Material 12 Inorganic Porous Body Matrix 14 Powder of Photocatalytically Active Substance 16 Inorganic Granular Material 18 Inorganic Porous Body Matrix
Claims (5)
活性を有する物質の粉体を、該粉体表面の少なくとも一
部が露出するように、固定してなることを特徴とする無
機粒状材料。1. An inorganic granular material, characterized in that powder of a substance having photocatalytic activity is fixed in an inorganic porous material matrix so that at least a part of the surface of the powder is exposed.
チタンであることを特徴とする請求項１記載の無機粒状
材料。2. The inorganic particulate material according to claim 1, wherein the substance having photocatalytic activity is titanium dioxide.
均粒径が０．１〜１０μｍであることを特徴とする請求
項１記載の無機粒状材料。3. The inorganic particulate material according to claim 1, wherein the powder of the substance having photocatalytic activity has an average particle size of 0.1 to 10 μm.
無機多孔質体マトリックス中に１〜２００重量％含まれ
ることを特徴とする請求項１乃至３記載の無機粒状材
料。4. The powder of the substance having photocatalytic activity,
The inorganic granular material according to any one of claims 1 to 3, wherein the inorganic porous material matrix contains 1 to 200% by weight.
活性を有する物質の粉体を均一に分散した後、該マトリ
ックスを硬化し、硬化したマトリックスを該光触媒活性
を有する物質の粉体表面の少なくとも一部が露出するよ
うに破砕する、ことを特徴とする無機粒状材料の製造方
法。5. A powder of a substance having a photocatalytic activity is uniformly dispersed in an inorganic porous material matrix, and then the matrix is cured, and the cured matrix is at least on the surface of the powder of the substance having a photocatalytic activity. A method for producing an inorganic granular material, which comprises crushing so that a part of the material is exposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22626495A JP3652742B2 (en) | 1995-09-04 | 1995-09-04 | Inorganic granular material and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22626495A JP3652742B2 (en) | 1995-09-04 | 1995-09-04 | Inorganic granular material and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0966238A true JPH0966238A (en) | 1997-03-11 |
| JP3652742B2 JP3652742B2 (en) | 2005-05-25 |
Family
ID=16842486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22626495A Expired - Fee Related JP3652742B2 (en) | 1995-09-04 | 1995-09-04 | Inorganic granular material and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3652742B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0975747A (en) * | 1995-09-11 | 1997-03-25 | Okaya Electric Ind Co Ltd | Method for caking photocatalyst |
| JPH10279830A (en) * | 1997-04-03 | 1998-10-20 | Shikoku Chem Corp | Wall coating material and wall coating method |
| JP2000117117A (en) * | 1998-10-12 | 2000-04-25 | Mitsubishi Materials Corp | Photocatalytic material |
| JP2007008740A (en) * | 2005-06-28 | 2007-01-18 | Ohbayashi Corp | Building material having adsorption function and photocatalytic function and method of manufacturing the same |
| JP2007275767A (en) * | 2006-04-06 | 2007-10-25 | Earth Kensetsu Consultant Kk | Photocatalyst-deposited granular substance, and package for air clarification and grass-proofing using the same |
| US7300514B2 (en) * | 2002-10-03 | 2007-11-27 | Ciments Francais | Photocatalytic granular mixture for mortar and concrete and its use |
| JP2008036465A (en) * | 2006-08-01 | 2008-02-21 | Fujitsu Ltd | Photocatalytic composite material and its manufacturing method |
| JP6202589B1 (en) * | 2016-06-27 | 2017-09-27 | 中国電力株式会社 | Water quality improving material, production method thereof, and water quality improving method |
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|---|---|---|---|---|
| JPH04284851A (en) * | 1991-03-14 | 1992-10-09 | Japan Storage Battery Co Ltd | Photo-catalyst body |
| JPH06327965A (en) * | 1993-03-24 | 1994-11-29 | Nippon Zeon Co Ltd | Removing agent for harmful material and method for removing harmful material and removing device for harmful material |
| JPH07148434A (en) * | 1993-07-12 | 1995-06-13 | Ishihara Sangyo Kaisha Ltd | Photocatalyst and water cleaning method using the same |
| JPH07171408A (en) * | 1993-06-28 | 1995-07-11 | Ishihara Sangyo Kaisha Ltd | Photocatalytic body and its production |
| JPH0889564A (en) * | 1994-09-26 | 1996-04-09 | Zeon Kasei Co Ltd | Harmful material removing agent, removing method and removing device |
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1995
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04284851A (en) * | 1991-03-14 | 1992-10-09 | Japan Storage Battery Co Ltd | Photo-catalyst body |
| JPH06327965A (en) * | 1993-03-24 | 1994-11-29 | Nippon Zeon Co Ltd | Removing agent for harmful material and method for removing harmful material and removing device for harmful material |
| JPH07171408A (en) * | 1993-06-28 | 1995-07-11 | Ishihara Sangyo Kaisha Ltd | Photocatalytic body and its production |
| JPH07148434A (en) * | 1993-07-12 | 1995-06-13 | Ishihara Sangyo Kaisha Ltd | Photocatalyst and water cleaning method using the same |
| JPH0889564A (en) * | 1994-09-26 | 1996-04-09 | Zeon Kasei Co Ltd | Harmful material removing agent, removing method and removing device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0975747A (en) * | 1995-09-11 | 1997-03-25 | Okaya Electric Ind Co Ltd | Method for caking photocatalyst |
| JPH10279830A (en) * | 1997-04-03 | 1998-10-20 | Shikoku Chem Corp | Wall coating material and wall coating method |
| JP2000117117A (en) * | 1998-10-12 | 2000-04-25 | Mitsubishi Materials Corp | Photocatalytic material |
| US7300514B2 (en) * | 2002-10-03 | 2007-11-27 | Ciments Francais | Photocatalytic granular mixture for mortar and concrete and its use |
| US7556683B2 (en) | 2002-10-03 | 2009-07-07 | Ciments Francais | Photocatalytic granular mixture for mortar and concrete and its use |
| JP2007008740A (en) * | 2005-06-28 | 2007-01-18 | Ohbayashi Corp | Building material having adsorption function and photocatalytic function and method of manufacturing the same |
| JP2007275767A (en) * | 2006-04-06 | 2007-10-25 | Earth Kensetsu Consultant Kk | Photocatalyst-deposited granular substance, and package for air clarification and grass-proofing using the same |
| JP2008036465A (en) * | 2006-08-01 | 2008-02-21 | Fujitsu Ltd | Photocatalytic composite material and its manufacturing method |
| JP6202589B1 (en) * | 2016-06-27 | 2017-09-27 | 中国電力株式会社 | Water quality improving material, production method thereof, and water quality improving method |
| WO2018002982A1 (en) * | 2016-06-27 | 2018-01-04 | 中国電力株式会社 | Water quality improvement material, method for manufacturing same, and water quality improvement method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3652742B2 (en) | 2005-05-25 |
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