JP2005139020A - 可視光応答型酸化チタン粉末光触媒およびその製造法 - Google Patents
可視光応答型酸化チタン粉末光触媒およびその製造法 Download PDFInfo
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- JP2005139020A JP2005139020A JP2003375906A JP2003375906A JP2005139020A JP 2005139020 A JP2005139020 A JP 2005139020A JP 2003375906 A JP2003375906 A JP 2003375906A JP 2003375906 A JP2003375906 A JP 2003375906A JP 2005139020 A JP2005139020 A JP 2005139020A
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 104
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 239000000843 powder Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title abstract description 21
- 239000011941 photocatalyst Substances 0.000 title description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 142
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 71
- 230000001699 photocatalysis Effects 0.000 claims abstract description 23
- 239000007858 starting material Substances 0.000 claims abstract description 20
- 239000012159 carrier gas Substances 0.000 claims abstract description 17
- 239000006199 nebulizer Substances 0.000 claims abstract description 11
- 239000007921 spray Substances 0.000 claims abstract description 11
- 238000002835 absorbance Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 150000001875 compounds Chemical class 0.000 claims description 10
- 238000005118 spray pyrolysis Methods 0.000 claims description 8
- 239000012046 mixed solvent Substances 0.000 claims description 5
- 238000000197 pyrolysis Methods 0.000 claims description 3
- 239000000243 solution Substances 0.000 abstract description 21
- 238000006243 chemical reaction Methods 0.000 abstract description 12
- 239000010419 fine particle Substances 0.000 abstract description 12
- 239000003570 air Substances 0.000 abstract description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- 239000011259 mixed solution Substances 0.000 abstract description 5
- 239000001301 oxygen Substances 0.000 abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 abstract description 5
- 239000007864 aqueous solution Substances 0.000 abstract description 3
- 229910052786 argon Inorganic materials 0.000 abstract description 3
- 239000001307 helium Substances 0.000 abstract description 3
- 229910052734 helium Inorganic materials 0.000 abstract description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 9
- 239000013078 crystal Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010304 firing Methods 0.000 description 5
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 4
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000031700 light absorption Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 238000003917 TEM image Methods 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000000921 elemental analysis Methods 0.000 description 2
- 229960000789 guanidine hydrochloride Drugs 0.000 description 2
- PJJJBBJSCAKJQF-UHFFFAOYSA-N guanidinium chloride Chemical compound [Cl-].NC(N)=[NH2+] PJJJBBJSCAKJQF-UHFFFAOYSA-N 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- DCKVFVYPWDKYDN-UHFFFAOYSA-L oxygen(2-);titanium(4+);sulfate Chemical compound [O-2].[Ti+4].[O-]S([O-])(=O)=O DCKVFVYPWDKYDN-UHFFFAOYSA-L 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000003504 photosensitizing agent Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000011164 primary particle Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- JMXKSZRRTHPKDL-UHFFFAOYSA-N titanium ethoxide Chemical compound [Ti+4].CC[O-].CC[O-].CC[O-].CC[O-] JMXKSZRRTHPKDL-UHFFFAOYSA-N 0.000 description 2
- 229910000348 titanium sulfate Inorganic materials 0.000 description 2
- 229910001428 transition metal ion Inorganic materials 0.000 description 2
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- LCKIEQZJEYYRIY-UHFFFAOYSA-N Titanium ion Chemical compound [Ti+4] LCKIEQZJEYYRIY-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- CEJANLKHJMMNQB-UHFFFAOYSA-M cryptocyanin Chemical compound [I-].C12=CC=CC=C2N(CC)C=CC1=CC=CC1=CC=[N+](CC)C2=CC=CC=C12 CEJANLKHJMMNQB-UHFFFAOYSA-M 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 239000002781 deodorant agent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- NDEMNVPZDAFUKN-UHFFFAOYSA-N guanidine;nitric acid Chemical compound NC(N)=N.O[N+]([O-])=O.O[N+]([O-])=O NDEMNVPZDAFUKN-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- LLZRNZOLAXHGLL-UHFFFAOYSA-J titanic acid Chemical class O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 description 1
- AKMXMQQXGXKHAN-UHFFFAOYSA-N titanium;hydrate Chemical compound O.[Ti] AKMXMQQXGXKHAN-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 229940045136 urea Drugs 0.000 description 1
Images
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- Inorganic Compounds Of Heavy Metals (AREA)
- Catalysts (AREA)
Abstract
【解決手段】酸化チタンの出発原料と窒素源を含む水、有機または水-有機混合溶液を噴霧溶液としてネブライザで液滴径が0.1μmから50μmの微小な液滴を霧化して、該液滴をアルゴン、ヘリウム、窒素、酸素あるいは空気のキャリアーガスを用いて気液混相の状態で高温反応炉内へ送り、該反応炉内部で酸化チタンと窒素の出発原料を熱分解して窒素を含む酸化チタン微粒子を生成する。この方法で得られた酸化チタン粉末は、波長400〜550 nmにおける吸光度が20〜40%であり、可視光による高い光触媒機能を有する。
【選択図】 図4
Description
ル/リットルの範囲がよい。溶液濃度が0.01モル/リットルより薄い場合、酸化チタンに含まれる窒素の含有量が少なく、可視光による触媒活性が低い。また、溶液濃度が10モル/リットルより濃い場合、酸化チタン沈殿の析出と酸化チタン回収率の低下等の問題が生じる。
て波長250〜800nmにおける吸光度を測定した。その結果は、図4に示す。NTO-800の吸光度は、波長400〜550 nmにおける吸光度が20〜40%であり、次第に低くなり、波長600nmからは従来の窒素を含まない酸化チタンと同程度になる。本発明の方法により製造された窒素を含む酸化チタンは、紫外線に対して高い吸収率を維持したまま、一部分の可視光も吸収することが分かる。
比較例1
比較するために、窒素源を使わずNTO-800と同じ条件で窒素を含まない酸化チタン粉末(TO-800)も製造した。BET表面積はグラムあたり15.7平方メートルである。その光吸収特性は図4に示す。比較例のTO-800は、NTO-800又はNTO-1000のような結果が得られなかった。
)の場合にTO-800の7倍、可視光照射(VIS)の場合にTO-800の17倍になる。窒素の導入により酸化チタンの光触媒機能は紫外と可視光両方照射において著しく改善された。
2:ペリスタポンプ
3:ネブライザ
4:アスペレータ
5:キャリアーガス供給装置
6:高温加熱体
7:反応管
8:ガラスフィルタ
9:フレキシブルヒータ
10:トラップ
11:温度調整器
Claims (6)
- 噴霧熱分解法により得られ窒素を含有することを特徴とする酸化チタン粉末。
- 波長400〜550nmにおける吸光度が20〜40%であることを特徴とする請求項1記載の酸化チタン粉末。
- 表面がポーラス状であることを特徴とする請求項1または2記載の酸化チタン粉末。
- 酸化チタンの紫外光による高機能光触媒特性を維持したまま、可視光による光触媒機能を有することを特徴とする請求項1ないし3のいずれかに記載の酸化チタン粉末。
- 酸化チタンの出発原料の一種又は二種以上を含む水、有機または水-有機混合溶媒と窒素源の化合物の一種又は二種以上を含む水、有機または水−有機混合溶媒とを混合して、噴霧溶液としてネブライザで液滴径が0.1μmから50μmの微小な液滴を霧化して、該液滴をキャリアーガスの流れに伴う、気液混相の状態で高温反応炉内へ送り、該反応炉内部で酸化チタンの出発原料と窒素源の化合物を熱分解して酸化チタンの形成と同時に窒素のドーピングも行うことを特徴とする請求項1ないし4のいずれかに記載の酸化チタン粉末の製造方法。
- 熱分解温度、噴霧溶液中での酸化チタンの出発原料と窒素源の化合物の種類と濃度、高温反応炉内へ送るキャリアーガスの種類によって酸化チタン粉末の窒素の含有量を10ppmから20000ppmの範囲にコントロールすることを特徴とする請求項5記載の酸化チタン粉末の製造方法。
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006131458A (ja) * | 2004-11-05 | 2006-05-25 | Toda Kogyo Corp | 酸化チタン粒子粉末及び光触媒 |
JP2007203223A (ja) * | 2006-02-02 | 2007-08-16 | National Institute For Materials Science | 可視光応答型酸化チタン−活性炭複合系光触媒及びその製造法 |
US20110266136A1 (en) * | 2010-04-30 | 2011-11-03 | Varma Rajender S | Doped titanium dioxide as a visible and sun light photo catalyst |
WO2013130021A1 (en) * | 2012-02-29 | 2013-09-06 | Scg Chemicals Co., Ltd. | High emissivity coating compositions and manufacturing processes therefore |
-
2003
- 2003-11-05 JP JP2003375906A patent/JP4625942B2/ja not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006131458A (ja) * | 2004-11-05 | 2006-05-25 | Toda Kogyo Corp | 酸化チタン粒子粉末及び光触媒 |
JP2007203223A (ja) * | 2006-02-02 | 2007-08-16 | National Institute For Materials Science | 可視光応答型酸化チタン−活性炭複合系光触媒及びその製造法 |
US20110266136A1 (en) * | 2010-04-30 | 2011-11-03 | Varma Rajender S | Doped titanium dioxide as a visible and sun light photo catalyst |
US8791044B2 (en) * | 2010-04-30 | 2014-07-29 | The United States Of America As Represented By The Administrator Of The U.S. Environmental Protection Agency | Doped titanium dioxide as a visible and sun light photo catalyst |
WO2013130021A1 (en) * | 2012-02-29 | 2013-09-06 | Scg Chemicals Co., Ltd. | High emissivity coating compositions and manufacturing processes therefore |
US9587120B2 (en) | 2012-02-29 | 2017-03-07 | Scg Chemicals Co., Ltd. | High emissivity coating compositions and manufacturing processes therefore |
KR101908000B1 (ko) | 2012-02-29 | 2018-10-15 | 에스씨지 케미컬스 컴퍼니, 리미티드. | 고방사율 코팅 조성물 및 이의 제조 방법 |
US10400150B2 (en) | 2012-02-29 | 2019-09-03 | Scg Chemicals Co., Ltd. | High emissivity coating compositions and manufacturing processes therefore |
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