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Preparation method of metallic oxide with photocatalytic activity

A photocatalytic activity and oxide technology, applied in the field of photocatalytic materials, can solve the problems of material specific surface area reduction, high energy consumption, crystal size increase, etc., and achieve slow crystal growth rate, high specific surface area, and small primary particle size Effect

Inactive Publication Date: 2016-12-07
深圳市尤佳环境科技有限公司
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Problems solved by technology

[0005] The above-mentioned methods all require high-temperature crystallization treatment, which consumes a lot of energy in manufacturing.
On the other hand, even if corresponding measures are taken in high temperature treatment, the crystal size will inevitably increase compared with low temperature conditions.
This means that the specific surface area of ​​the material is reduced and the catalytic efficiency is reduced

Method used

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  • Preparation method of metallic oxide with photocatalytic activity

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[0024] The present invention provides a low-temperature preparation method of metal oxides with photocatalytic activity, wherein these metal oxides with photocatalytic activity are semiconductor materials with energy band structure and forbidden band, for example, they can be selected from titanium oxide, zinc oxide, One of tungsten oxide, tin oxide, palladium oxide, cuprous oxide, strontium titanate, aluminum titanate, barium titanate, etc. or a composite material formed by several of them. Some applications are accomplished by taking advantage of the electronic transition characteristics of these metal-semiconductor oxides under light irradiation.

[0025] The low-temperature preparation method of this photocatalytically active metal oxide comprises the following steps:

[0026] step one:

[0027] (1) Acquiring a metal precursor corresponding to the metal oxide.

[0028] For the selected metal oxide, some corresponding metal precursors are available, and some metal precurs...

Embodiment 1

[0045] 20 g of tetrabutyl titanate was added dropwise to 200 ml of deionized water, and continued to stir for 1 h. The obtained white precipitate of titanium hydroxide was centrifuged at 5000 r / min for 10 min, rinsed twice with ethanol, and purified titanium hydroxide was obtained.

[0046] Mix the purified titanium hydroxide with 160g of ethanol, add 1ml of 4mol / L nitric acid to adjust the pH, add 0.28g of ferric nitrate, stir and mix to form a dispersion. Then the dispersion liquid was transferred into a high-pressure airtight container, and kept at 160° C. for 10 h to obtain a reaction product. The reaction product was separated at 8000 r / min, washed twice with deionized water and then dried at 80° C. to obtain iron-doped titanium dioxide.

Embodiment 2

[0048] Same as Example 1, wherein the liquid medium is changed from ethanol to deionized water.

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Abstract

The invention relates to the technical field of photocatalytic materials, in particular to a preparation method of a metallic oxide with photocatalytic activity. The method comprises the following steps that 1, a metal precursor corresponding to the metallic oxide is obtained, a liquid-phase medium is added according to the condition that the mass ratio of the metal precursor to the liquid-phase medium is 1:(5-40), stirring and mixing are conducted, and a dispersion liquid is obtained; 2, the dispersion liquid is transferred into a high-pressure closed container, a thermal insulation reaction is conducted for 2 h to 24 h under the temperature condition of 120 DEG C to 200 DEG C, and a reaction product is obtained; 3, solid-liquid separation, cleaning and drying are conducted on the reaction product, and the metallic oxide is obtained. According to the method for preparing the metallic oxide with the photocatalytic activity through low temperature, the metallic oxide is small in primary particle size and high in specific surface area, and doped ions are easy to introduce.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a low-temperature preparation method of metal oxides with photocatalytic activity. Background technique [0002] Some metal oxides, such as titanium dioxide, have a photocatalytic effect and can catalyze the decomposition of water and various organic substances under the excitation of light. Such metal oxide materials can be applied in fields such as energy and environment. However, in the actual civil use in the environmental field, it is necessary to improve the utilization efficiency of materials for natural light and indoor light sources. [0003] The methods to improve the catalytic efficiency of such metal oxides mainly include reducing the primary particle size to increase the specific surface area, ion doping and compounding of different metal oxides. In previous methods, such as Iwashina et al. (JOURNAL OF THEAMERICAN CHEMICAL SOCIETY, pp. 13272-13275,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/78
CPCB01J23/002B01J23/745B01J23/78B01J35/39
Inventor 谢璀杨劼徐超刚田谧孙晋红
Owner 深圳市尤佳环境科技有限公司
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