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Titanium oxide photocatalyst loaded with iron compound

A photocatalyst, titanium oxide technology, applied in the direction of physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, etc., can solve the problem of insufficient photocatalyst activity, etc. The effect of catalytic capacity

Active Publication Date: 2020-12-29
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in terms of photocatalytic activity, it is not sufficient

Method used

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  • Titanium oxide photocatalyst loaded with iron compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] 10 g of titanium oxide (a mixture of rutile-type titanium oxide (20 wt %) and anatase-type titanium oxide (80 wt %), average particle size: 30 nm, specific surface area: 50 m 2 / g, trade name "AEROXIDE TiO 2 P25" (manufactured by Japan Aerosil Co., Ltd.) and 90 g of ion-exchanged water were stirred and mixed to obtain a suspension.

[0066] 0.15 g of iron (III) chloride aqueous solution (iron (III) chloride concentration: 38 weight %) was added to the obtained suspension, and it stirred at 25 degreeC for 30 minutes. Then, 2.3 g of methanol (corresponding to 23% by weight of titanium oxide) was added, and ultraviolet rays (UV) were irradiated for 6 hours using a 10W black light lamp (UV irradiation amount: 10 mW / cm) 2 ).

[0067]Then, the suspension was placed in a high-speed centrifugal precipitation machine (centrifugal force: 20,000 G, time: 10 to 20 minutes), and the powder was washed (washed with water until the conductivity of the supernatant was 200 μS / cm or les...

Embodiment 2

[0071] A photocatalyst (2) (iron content: 220 ppm, chlorine atom) was obtained in the same manner as in Example 1, except that the addition amount of the iron (III) chloride aqueous solution (38% by weight) was changed from 0.15 g to 0.075 g. Content: 600 ppm, iron element content / chlorine atom content: 0.37, average particle size: 30 nm).

Embodiment 3

[0073] A photocatalyst (3) (iron element content: 320 ppm, chlorine atom) was obtained in the same manner as in Example 1, except that the addition amount of the iron (III) chloride aqueous solution (38 wt %) was changed from 0.15 g to 0.3 g. Content: 760 ppm, iron element content / chlorine atom content: 0.42, average particle size: 30 nm).

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Abstract

The present invention provides a highly active photocatalyst that has excellent responsiveness to both visible light and ultraviolet light. The photocatalyst of the present invention has a structure in which an iron compound is supported on the surface of titanium oxide, wherein the titanium oxide contains rutile titanium oxide and anatase titanium oxide, and the content of the rutile titanium oxide and anatase titanium oxide is The ratio is in the range of 15 / 85 to 25 / 75 (former / latter (weight ratio)), the average particle size of the titanium oxide (measured by laser diffraction particle size distribution) is 100 nm or less, and the iron based on titanium oxide The element content is 50 to 1200 ppm, the chlorine atom content based on titanium oxide is 50 to 1200 ppm, and the iron element content / chlorine atom content (weight ratio) is 1.0 or less.

Description

technical field [0001] The present invention relates to an iron compound-supported titanium oxide photocatalyst and a method for producing the same. Background technique [0002] Radicals with strong oxidizing power are generated when ultraviolet rays are irradiated to titanium oxide, oxidation and decomposition of organic compounds (for example, dirt, odorous gases, etc.), inorganic compounds (for example, NOx, NH) 3 In recent years, it has been applied to environmental purification, deodorization, antifouling, antibacterial and antifungal, etc. However, titanium oxide can exhibit excellent photocatalytic ability under sunlight. However, the amount of ultraviolet rays contained in the light sources of ordinary living spaces such as incandescent lamps and fluorescent lamps is extremely small, about 4%, and most of them are visible. Since light and infrared rays are composed, there is a problem that sufficient photocatalytic ability cannot be exerted under such a light sourc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/128C09D5/14C09D5/16B01D53/86C02F1/30A61L2/08A61L2/10A61L9/18A61L9/20B01J35/00
CPCA61L2/088A61L9/18A61L9/205B01D53/86C02F1/30C09D5/14C09D5/1687B01J27/128C02F2305/10B01D2259/81B01J35/39C09D5/1618B01J21/063B01J23/745B01J37/0201B01J37/341B01J35/40
Inventor 中井彻
Owner DAICEL CHEM IND LTD
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