JP6375565B2 - 光触媒の製造方法 - Google Patents
光触媒の製造方法 Download PDFInfo
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- JP6375565B2 JP6375565B2 JP2015039720A JP2015039720A JP6375565B2 JP 6375565 B2 JP6375565 B2 JP 6375565B2 JP 2015039720 A JP2015039720 A JP 2015039720A JP 2015039720 A JP2015039720 A JP 2015039720A JP 6375565 B2 JP6375565 B2 JP 6375565B2
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- JP
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- photocatalyst
- sintering
- powder
- urea
- titanium oxide
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- 239000011941 photocatalyst Substances 0.000 title claims description 42
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 238000005245 sintering Methods 0.000 claims description 40
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 37
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 32
- 239000000843 powder Substances 0.000 claims description 31
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 28
- 239000004202 carbamide Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 25
- 239000011812 mixed powder Substances 0.000 claims description 16
- 229910017464 nitrogen compound Inorganic materials 0.000 claims description 9
- 150000002830 nitrogen compounds Chemical class 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- 238000002490 spark plasma sintering Methods 0.000 claims description 6
- 150000003672 ureas Chemical class 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 235000013877 carbamide Nutrition 0.000 description 28
- 230000000694 effects Effects 0.000 description 18
- 238000000354 decomposition reaction Methods 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 11
- 229910010413 TiO 2 Inorganic materials 0.000 description 11
- 238000010586 diagram Methods 0.000 description 11
- 229960000907 methylthioninium chloride Drugs 0.000 description 11
- 239000007864 aqueous solution Substances 0.000 description 9
- 230000001699 photocatalysis Effects 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000004043 responsiveness Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 230000004298 light response Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000447 dimerizing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005596 polymer binder Polymers 0.000 description 1
- 239000002491 polymer binding agent Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- -1 superoxide ions Chemical class 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Catalysts (AREA)
Description
図3は、事前検討として尿素を混合していないTiO2の焼結温度と紫外線照射により評価した光触媒機能の関係を示す図である。原料粉末としてTiO2粉末(平均粒径7nm、石原産業株式会社製)を用い、これをグラファイトの型(焼結ダイ)に敷き詰め、放電プラズマ焼結(SPS:Spark Plasma Sintering)装置により500℃から900℃の範囲内において加熱して焼結を行った。
実施例1ではφ20(直径20mm)の焼結体で実験を行ったが、本実施例ではφ40の焼結体で実施例1と同様の実験を行った。また、尿素の配合量として、0%、5%、10%、15%の4種類に絞って焼結体の製造を行った。
上記実施例1及び実施例2により、尿素を混合した酸化チタンの焼結体に高い可視光応答性があることが示された。可視光応答性が高い理由としては、酸化チタンに窒素がドープされている、又は酸素欠損によるものであると推察される。そこで、本実施例では、尿素を15wt%混合し、700℃真空中でSPS焼結した焼結体に、700℃大気雰囲気で2時間高温酸化処理したものについて、実施例1及び実施例2と同様の実験を行った。図11は、MB水溶液濃度の変化を示す図である。
2 酸化チタン
3 電子
4 正孔
5 O2
6 H2O
7 O2 −
8 OH
9 汚染物質
51 焼結ダイ
52 粉体
53 水冷真空チャンパ−
54 上部パンチ
55 下部パンチ
56 上部パンチ電極
57 下部パンチ電極
58 焼結電源(パルス電源)
59 加圧機構
81 セル
82 光触媒焼結体
83 MB水溶液
84 蛍光灯
Claims (2)
- 酸化チタン粉末と、尿素及び尿素誘導体の少なくともいずれかを含む窒素化合物粉末を、前記窒素化合物が0重量%より大きく30重量%よりも小さい範囲となるよう混合して混合粉を作製する混合粉作製工程と、
500℃以上900℃以下の放電プラズマ焼結によって、前記混合粉を焼結して焼結体を得る焼結工程と、を有する光触媒製造方法。 - 前記焼結工程は、前記混合粉に5MPa以上40MPa以下の圧力を加えて焼結する請求項1記載の光触媒製造方法。
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JP2016159226A JP2016159226A (ja) | 2016-09-05 |
JP6375565B2 true JP6375565B2 (ja) | 2018-08-22 |
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Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000044334A (ja) * | 1998-07-29 | 2000-02-15 | Yamaha Corp | アナターゼ型チタニア焼結体及びその製造方法 |
JP3589177B2 (ja) * | 2000-11-10 | 2004-11-17 | 株式会社豊田中央研究所 | 無機系酸窒化物の製造方法 |
JP3587178B2 (ja) * | 2001-04-24 | 2004-11-10 | 株式会社豊田中央研究所 | 表面改質された無機系酸化物及び無機系酸窒化物 |
JP4081357B2 (ja) * | 2002-11-27 | 2008-04-23 | Spsシンテックス株式会社 | 優先配向を有するナノ構造酸化チタン焼結体及びその製造方法 |
JP2004243212A (ja) * | 2003-02-13 | 2004-09-02 | Fumiyoshi Saito | 酸化物系触媒の改質方法及びこの方法により得られる酸化物系改質触媒 |
JP2006095520A (ja) * | 2004-09-02 | 2006-04-13 | Shimane Pref Gov | 異原子導入型酸化チタン光触媒の製造方法 |
JP2008179528A (ja) * | 2006-12-26 | 2008-08-07 | Toho Titanium Co Ltd | 酸化チタンの製造方法 |
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