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Titanium oxide photocatalyst having copper compounds supported thereon, and method for producing same

一种铜化合物、光催化剂的技术，应用在化学仪器和方法、催化剂活化/制备、植物学设备和方法等方向，能够解决不能表现出催化剂活性等问题，达到光催化剂活性优异的效果

Active Publication Date: 2013-07-31
THE UNIV OF TOKYO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, titanium oxide can only exhibit photocatalytic activity under ultraviolet irradiation, and cannot exhibit sufficient catalytic activity under indoor light that hardly contains ultraviolet rays.

Method used

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  • Titanium oxide photocatalyst having copper compounds supported thereon, and method for producing same
  • Titanium oxide photocatalyst having copper compounds supported thereon, and method for producing same
  • Titanium oxide photocatalyst having copper compounds supported thereon, and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 manufacture example ＞

[0079] In this production example, to a suspension containing titanium oxide and a divalent copper compound having a rutile-type titanium oxide content of 50% by mole or more, was added to reduce divalent copper (Cu(II)) to monovalent copper (Cu(I)) reducing agent.

[0080] "Suspension preparation process"

[0081] In this step, a suspension is prepared by blending titanium oxide having a rutile-type titanium oxide content of 50 mol % or more and a divalent copper compound. After the above blending, it is preferable to prepare a suspension by stirring at, for example, 60°C or higher, preferably 70 to 100°C, more preferably 80 to 95°C for several hours, preferably about 1 hour.

[0082] (titanium oxide)

[0083] The properties of titanium oxide used in this production example (the content of rutile-type titanium oxide in the total amount of titanium oxide and the specific surface area) are the same as those described above for the copper compound-supported titanium oxide phot...

no. 2 manufacture example ＞

[0094] This production example includes the following steps: For a catalyst precursor containing titanium oxide having a content of rutile-type titanium oxide of 50 mol% or more and a divalent copper compound supported on the surface of the titanium oxide, nitrogen and alcohol are preferably mixed together. Light irradiation is performed in an atmosphere to reduce a part of the divalent copper compound to a monovalent copper compound.

[0095] "Catalyst Precursor"

[0096] The catalyst precursor is not particularly limited as long as it contains titanium oxide having a rutile-type titanium oxide content of 50 mol % or more and a divalent copper compound supported on the surface of the titanium oxide. For example, only a divalent copper compound may be supported on the surface of titanium oxide, or a monovalent copper compound may be supported together with a divalent copper compound. In addition, as the catalyst precursor, the existence ratio of the above-mentioned monovalent...

Embodiment 1

[0115] 50 g of rutile titanium oxide (F-10, manufactured by Showa Titanium Co., Ltd., BET specific surface area: 12 m 2 / g) was suspended in 1000 mL of distilled water, and 0.293 g of CuCl was added to 0.22 parts by mass of copper ions relative to 100 parts by mass of titanium oxide. 2 2H 2 O (manufactured by Kanto Chemical Co., Ltd.), heated at 90° C., and heat-treated for 1 hour while stirring. to make CuCl 2 2H 2 O:C 6 h 12 o 6 Add 1 mol / L, 13.75 ml of sodium hydroxide (manufactured by Kanto Chemical Co., Ltd.) aqueous solution and 1 mol / L, 6.88 ml of glucose (manufactured by Kanto Chemical Co., Ltd.) so that the molar ratio of NaOH is 1:4:8 Aqueous solution, heat treatment at 70°C for 1 hour. The slurry was filtered, and the obtained powder was washed with pure water, dried at 80° C., and pulverized with a mixer to obtain a sample.

[0116] The obtained sample was heated in a hydrofluoric acid solution to completely dissolve it, and the extract was quantified by IC...

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Abstract

A copper compound-carried titanium oxide photocatalyst which is excellent in a photocatalytic activity and a viral inactivation property and a production process for the same can be provided by a copper compound-carried titanium oxide photocatalyst comprising titanium oxide in which a content of rutile type titanium oxide is 50 % by mole or more and a monovalent copper compound and a divalent copper compound which are carried on a surface of the titanium oxide described above and a production process for a copper compound-carried titanium oxide photocatalyst, comprising a step of carrying a monovalent copper compound and a divalent copper compound on a surface of titanium oxide in which a content of rutile type titanium oxide is 50 % by mole or more.

Description

technical field [0001] The present invention relates to a titanium oxide photocatalyst that has a copper compound on the surface of titanium oxide and supports a copper compound, and a method for producing the same. Background technique [0002] Photocatalysts using titanium oxide are widely used as photocatalysts because they are inexpensive, have excellent chemical stability, have high catalytic activity, and are harmless to the human body (see, for example, Patent Documents 1 and 2). [0003] However, titanium oxide can only exhibit photocatalytic activity under ultraviolet irradiation, and cannot exhibit sufficient catalytic activity under indoor light that hardly contains ultraviolet rays. Therefore, a visible light-responsive photocatalyst capable of exhibiting photocatalytic activity even under indoor light such as a fluorescent lamp has been proposed. [0004] For example, Patent Document 3 describes titanium dioxide in which atoms such as nitrogen, carbon, and sulf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/02A01N59/20A61L9/00B01J23/72
CPCB01J37/344C01P2002/80C01G23/00B01J37/0201C09C1/3653B01J35/004B01J37/08C01P2006/12B01J37/06B01J37/035B01J35/002A01N59/20C01P2004/64B01J35/1019B01J21/063B01J37/16B01J23/72B01J37/0009B01J37/04B82Y30/00B01J35/30B01J35/39B01J35/613A01N25/08A01N2300/00B01J21/06
Inventor 桥本和仁宫内雅浩邱晓清砂田香矢乃黑田靖细木康弘李定下平祥贵
Owner THE UNIV OF TOKYO
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