n-tio2/c and n-tio2 and preparation method thereof

A titanium oxide and nitrogen doping technology is applied in the preparation of titanium dioxide nanomaterials, the preparation of nitrogen-doped titanium oxide (N-TiO2), and the field of nitrogen-doped titanium oxide/carbon nanocomposites, which can solve the problem of different reaction conditions. Mild, relatively high requirements for experimental conditions, to achieve the effects of low cost, high safety factor, and high nitrogen content
CN104028292BInactive Publication Date: 2016-05-04ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2016-05-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to N-TiO2 / C and N-TiO2 and a preparation method thereof, and specifically discloses a method for preparing nitrogen-doped titanium oxide and its nanocomposite with carbon by heat treatment in air. Its preparation method includes the following steps: (1) Mix 10wt% tetramethylammonium hydroxide aqueous solution with ethylene glycol, add titanium isopropoxide, stir well, and heat the obtained solution at 200°C for 8 hours; (2) Mix the step ( 1) The obtained hydrothermal product is centrifuged and washed in ethanol and deionized water, and dried in air at 70°C; (3) The dried product in step (2) is heat-treated in air at 250-550°C for 2 hours, that is A nitrogen-doped titanium oxide / carbon nanocomposite or nitrogen-doped titanium oxide is obtained. The nitrogen-doped titanium oxide / carbon nanocomposite and the nitrogen-doped titanium oxide obtained by the invention have the advantages of high nitrogen content, extended absorption spectrum to the light region, visible light photocatalytic activity and the like. The adopted preparation method has the advantages of simplicity, high safety factor, low cost and the like.
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Description

technical field

[0001] The invention relates to a preparation method of titanium dioxide nanomaterials, especially a nitrogen-doped titanium oxide / carbon nanocomposite (N-TiO 2 / C) or nitrogen-doped titanium oxide (N-TiO 2 ) preparation method, which belongs to the field of preparation of chemical materials, and has a very important application in photocatalytic degradation of pollutants. Background technique

[0002] Titanium oxide is a very common photocatalyst due to its low cost, non-toxicity, convenient chemical synthesis, and good thermal stability. Titanium oxide has three crystal forms, rutile, anatase and brookite. Among them, anatase is the most commonly used photocatalyst. The principle of photocatalytic degradation of organic matter is that under light conditions, photons with energy higher than the forbidden band width in the incident photons are absorbed by the valence band electrons, and then the electrons transition to the conduction band. The photogenera...

Claims

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