JP5217023B2 - 光触媒多層金属化合物薄膜及びその作成方法 - Google Patents
光触媒多層金属化合物薄膜及びその作成方法 Download PDFInfo
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- JP5217023B2 JP5217023B2 JP2009193027A JP2009193027A JP5217023B2 JP 5217023 B2 JP5217023 B2 JP 5217023B2 JP 2009193027 A JP2009193027 A JP 2009193027A JP 2009193027 A JP2009193027 A JP 2009193027A JP 5217023 B2 JP5217023 B2 JP 5217023B2
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- 239000010409 thin film Substances 0.000 title claims description 121
- 150000002736 metal compounds Chemical class 0.000 title claims description 65
- 230000001699 photocatalysis Effects 0.000 title claims description 62
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000010408 film Substances 0.000 claims description 63
- 239000000758 substrate Substances 0.000 claims description 42
- 238000004544 sputter deposition Methods 0.000 claims description 31
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 29
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 28
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 239000005300 metallic glass Substances 0.000 claims description 11
- 238000000151 deposition Methods 0.000 claims description 9
- 230000001678 irradiating effect Effects 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000007795 chemical reaction product Substances 0.000 claims description 6
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 6
- 229940126062 Compound A Drugs 0.000 claims description 2
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 51
- 238000000034 method Methods 0.000 description 41
- 230000008569 process Effects 0.000 description 33
- 229910010413 TiO 2 Inorganic materials 0.000 description 21
- 238000006243 chemical reaction Methods 0.000 description 19
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 16
- 229910001882 dioxygen Inorganic materials 0.000 description 16
- 239000011521 glass Substances 0.000 description 16
- 230000015572 biosynthetic process Effects 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 239000011941 photocatalyst Substances 0.000 description 10
- 229910004298 SiO 2 Inorganic materials 0.000 description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 239000010936 titanium Substances 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 7
- 238000009832 plasma treatment Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 150000003609 titanium compounds Chemical class 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005546 reactive sputtering Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002781 deodorant agent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000002003 electron diffraction Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- -1 respectively Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
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Description
まず、真空容器2内の回転ドラム3にガラス基材20をセットして、真空ポンプ(図示せず)によって真空容器2内を高真空状態にする(ステップS1)。
次に、図4を参照して第二の実施形態を説明する。尚、図においてステップS41〜S71は上述したステップS2〜S5と同等であり省略する。
(SiO2成膜条件)
ターゲット側への印加電力:6.5KW
活性種発生装置5への印加電力:3.5KW
スパッタ装置内の全圧力:0.34Pa
回転ドラム3の回転数:100rpm
成膜時間:249.7秒間
(シード層TiO2成膜条件)
ターゲット側への印加電力:3.8KW
活性種発生装置5への印加電力:3.0KW
スパッタ装置内の全圧力:0.74Pa
回転ドラム3の回転数:100rpm
成膜時間:370.3秒間
(光触媒層TiO2成膜条件)
ターゲット側への印加電力:3.0KW
活性種発生装置5への印加電力:3.0KW
スパッタ装置内の全圧力:0.57Pa
回転ドラム3の回転数:100rpm
成膜時間:406.2秒間
図1に示すスパッタ装置を用いて、ガラス基材20の表面に、酸化シリコン及び酸化チタンからなる金属化合物薄膜を形成した。作業工程は上記実施例の内シード層TiO2成膜を除いて行ない、金属化合物薄膜の膜厚は実施例と同等とした。
図1に示すスパッタ装置を用いて、ガラス基材20の表面に酸化チタンからなる金属化合物薄膜を形成した。作業工程は、上記特許文献1に示す従来法によって行ない、酸化チタン薄膜の上にはSiO2薄膜を形成した。その結果金属化合物薄膜の膜厚は240nmとなった。尚、この酸化チタン薄膜の光触媒活性化のためにプラズマ処理を行なった。
ガラス基材に形成されたSiO2/TiO2層を断面方向から透過電子顕微鏡(JEM−4000EM日本電子製)にて観察を行った結果を図5及び図6に示す。実施例の層はSiO2との界面に5〜7nmのアモルファスのTiO2層が確認され、その直上から最表面まで柱状に結晶化したTiO2層の2層構造が確認された。また、比較例1の層はSiO2との界面から25nmほどまでアモルファス層で、最表面まではアモルファスと微結晶の中に結晶化した領域が部分的に存在することが確認された。尚、実施例の2層のTiO2薄膜の合計膜厚は125nmであった。尚、図5は本実施例のTiO2薄膜を示し、図6は比較例1のTiO2薄膜を示す。
実施例のTiO2層及び比較例1のTiO2層の電子回折像から求めたd値と、X線回折でのd値を比較すると、いずれもアナターゼ型の結晶構造が見られることが確認された。また、図7は、断面TEMによるTiO2明視野と同じ観察位置での暗視野像を示しており、本実施例と比較例1から明らかなように、シード層を形成させる本発明の光触媒多層金属化合物薄膜は、アモルファスのTiO2層との界面から柱状的に結晶化したTiO2薄膜が形成され、比較例1と比較し結晶性に優れることが確認された。尚、図7のT090330cは本実施例のTiO2薄膜を示し、T090510dは比較例1のTiO2薄膜を示しており、図中の暗視野1及び2は同じ撮影部位を測定した。
上記の3種類の光触媒薄膜に対して、油分解評価法によって光触媒特性を比較した。この油分解評価法は、光触媒薄膜を形成した基材に、紫外線(ピーク波長:350nm)を24h照射し、純水を定量滴下して接触角測定装置によって接触角を測定し、さらに純水が乾燥した基材に油を滴下して前面に塗り伸ばしたのち、紫外線(ピーク波長:350nm)を10h照射して、純水を滴下してさらに接触角測定装置によって接触角度を測定した。図8に、上記油滴下後の光触媒特性比較結果を示す。
本発明の光触媒薄膜に関して、TiO2膜厚を40nm〜120nmまで段階的に変化させた、基材を準備し、上記の油分解評価法によって評価を行なった。その結果を図9に示す。
2 真空容器
3 回転ドラム
4a、4b スパッタ手段
5 活性種発生装置
6a、6b、6c 仕切り壁
7a、7b 成膜プロセス領域
8 反応プロセス領域
9a、9b スパッタガス供給手段
10 反応性ガス供給手段
11a、11b Arガスボンベ
12 酸素ガスボンベ
13 Arガスボンベ
14 ガス流量調節器
15 交流電源
16 高周波電源
17a、17b ターゲット
20 ガラス基材
21 酸化チタン薄膜
22 酸化チタン薄膜
23 酸化シリコン薄膜
Claims (6)
- 基体の表面にスパッタ法によって金属化合物の極薄膜を堆積し、さらに希ガスと反応性ガスの活性種を照射する工程を繰り返して基体の表面に形成された非晶質金属化合物薄膜からなるシード層と、該シード層上にスパッタ法によって金属及び金属不完全反応物からなる極薄膜を堆積し、さらにシード層とは異なる条件で希ガスと反応性ガスの活性種を照射する工程を繰り返し、前記シード層上に柱状に成長して形成された結晶質金属化合物薄膜と、からなることを特徴とする光触媒多層金属化合物薄膜。
- 前記基体の表面に形成されたシード層と、該シード層上に柱状に成長して形成された金属化合物薄膜の合計膜厚は少なくとも100nm以上であることを特徴とする請求項1記載の光触媒多層金属化合物薄膜。
- 前記基体と前記シード層の間に、酸化シリコン薄膜をさらに設けたことを特徴とする請求項1乃至2に記載の光触媒多層金属化合物薄膜。
- 前記非晶質金属化合物薄膜及び結晶質金属化合物薄膜は、酸化チタンで形成されたことを特徴とする請求項1乃至3に記載の光触媒多層金属化合物薄膜。
- 光触媒多層金属化合物薄膜の作成方法であって、基体の表面にスパッタ法によって金属化合物の極薄膜を堆積し、さらに希ガスと反応性ガスの活性種を照射する工程を繰り返して非晶質金属化合物薄膜からなるシード層を形成し、該シード層上にスパッタ法によって金属及び金属不完全反応物からなる極薄膜を堆積し、さらにシード層とは異なる条件で希ガスと反応性ガスの活性種を照射する工程を繰り返し、前記シード層上に柱状に成長した結晶質金属化合物薄膜を形成することを特徴とする光触媒多層金属化合物薄膜の作成方法。
- 前記非晶質金属化合物薄膜及び結晶質金属化合物薄膜は、酸化チタンであることを特徴とする請求項5に記載の光触媒多層金属化合物薄膜の作成方法。
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CN201080037641.4A CN102575337B (zh) | 2009-08-24 | 2010-08-23 | 光催化剂多层金属化合物薄膜及其制作方法 |
US13/391,564 US20120172196A1 (en) | 2009-08-24 | 2010-08-23 | Photocatalytic multilayer metal compound thin film and method for producing same |
PCT/JP2010/064201 WO2011024764A1 (ja) | 2009-08-24 | 2010-08-23 | 光触媒多層金属化合物薄膜及びその作成方法 |
DE112010003373T DE112010003373T5 (de) | 2009-08-24 | 2010-08-23 | Photokatalytisoher mehrschichtiger Metallverbindungs-Dünnfilm und Verfahren zu seiner Herstellung |
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