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Preparation method of titanium dioxide visible light photocatalyst with iron oxide modified surface

A titanium dioxide and surface modification technology, applied in the field of titanium dioxide visible light photocatalyst and its preparation, can solve the problems of being unable to be put into practical application and low photocatalytic activity, and achieve the effects of low cost, high photocatalyst activity and wide source of raw materials

Inactive Publication Date: 2010-12-15
金奇良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] And, as a narrow gap semiconductor, α-Fe 2 o 3 Can effectively absorb visible light (E g =2.2eV), has a certain photocatalytic activity, and is cheap, so it is a potential photocatalyst material, but from the existing reports, the existing α-Fe 2 o 3 The photocatalytic activity is very low, and it cannot be put into practical application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of the surface-modified titanium dioxide visible light photocatalyst of iron oxide is:

[0022] Take 1g of the above nano-titanium dioxide particles and add to 100ml containing 6.5×10 -5 M Fe(acac) 3 in ethanol and stirred at 0°C in the dark for 36 hours. The reaction mixture was separated by centrifugation, and the solid matter was washed repeatedly with ethanol, then dried in vacuum at room temperature, and then heat-treated at 580°C for 1 hour in an air environment to obtain the target product titanium dioxide visible light photocatalyst (FeO X / TiO 2 Nanoparticles).

[0023] The principle of the above reaction process is shown in the following chemical equation:

[0024] Fe(III)(acac) 3 +=Ti s (OH) 2 →=Ti s =O=Fe(III)(acac)+2AacacH.

[0025] = Ti s =O=Fe(III)(acac)→FeO X / TiO 2

Embodiment 2

[0027] The preparation method of the surface-modified titanium dioxide visible light photocatalyst of iron oxide is:

[0028] Take 1g of the above-mentioned nano-titanium dioxide particles and add to 100ml containing 1.0×10 -3 M Fe(acac) 3 in methanol and stirred at 25 °C for 24 hours in the dark. Centrifuge the reaction mixture, take the solid matter and wash it repeatedly with methanol or ethanol, then dry it in vacuum at room temperature, and then heat-treat it at 500°C for 1 hour in the air environment to obtain the target product titanium dioxide visible light photocatalyst (FeO X / TiO 2 Nanoparticles).

[0029] The principle of the above reaction process is shown in the following chemical equation:

[0030] Fe(III)(acac) 3 +=Ti s (OH) 2 →=Ti s =O=Fe(III)(acac)+2AacacH.

[0031] = Ti s =O=Fe(III)(acac)→FeO X / TiO 2

Embodiment 3

[0033] The preparation method of the surface-modified titanium dioxide visible light photocatalyst of iron oxide is:

[0034] Take 1g of the above-mentioned nano-titanium dioxide particles and add to 100ml containing 1.0×10 -2 M Fe(acac) 3 in a mixed solution of ethanol-n-hexane (3:17v / v), stirred in the dark at 30°C for 3 hours, centrifuged the reaction mixture, washed the solid matter repeatedly with methanol, ethanol or propanol, and then vacuumed at room temperature After drying, heat treatment at 450° C. for 1 hour was carried out in the air environment to obtain the target product titanium dioxide visible light photocatalyst (FeOX / TiO2 nanoparticles).

[0035] The principle of the above reaction process is shown in the following chemical equation:

[0036] Fe(III)(acac) 3 +=Ti s (OH) 2 →=Ti s =O=Fe(III)(acac)+2AacacH.

[0037] = Ti s =O=Fe(III)(acac)→FeO X / TiO 2

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Abstract

The invention relates to a preparation method of a titanium dioxide visible light photocatalyst with an iron oxide modified surface. The method is characterized by comprising the following steps of: adding a TiO2 nano material to an ethanol-n-hexane mixed solution containing 8.5*10<-6> M to 1.0*10<-2>M of Fe(acac)3 to form a reaction system; stirring at 25 DEG C in dark for 24 h; separating out solid from the reaction system; washing and drying the solid; and thermally processing the solid at 500 DEG C in air for 1 h to obtain a target product, wherein a volume ratio of ethanol to n-hexane in the ethanol-n-hexane mixed solution is 3 to 17, and the TiO2 nano material comprises TiO2 nano ions or is a TiO2 nano crystalline thin film. The invention has easy and convenient process, easy operation, wide raw material resources and low cost, and the prepared product has high light photocatalyst activity under broad-spectrum light waves and can satisfy the needs of practical applications.

Description

technical field [0001] The invention relates to a titanium dioxide photocatalyst and a preparation method thereof, in particular to a titanium dioxide visible light photocatalyst with iron oxide surface modified and a preparation method thereof. Background technique [0002] In the case of more and more serious environmental pollution, the development of catalysts for environmental purification has become an important topic for chemists. On the premise of the effective use of sunlight, semiconductor photocatalysts are one of the materials that are worth looking forward to as materials for environmental purification and hydrogen generation from water. Over the years, there have been a lot of researches on titanium dioxide photocatalyst with super light-induced oxidation ability and very stable physical and chemical properties. Because of its high activation ability, convenient extraction and low manufacturing cost, it has been initially put into practical use. However, titan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J21/06
Inventor 金奇良多田泓明
Owner 金奇良
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