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

Inactive Publication Date: 2016-05-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are relatively few researches on the compounding of nitrogen-doped titanium oxide and carbon at present, and the reaction conditions of the existing preparation methods are not mild, and the requirements for experimental conditions are relatively high.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a kind of like Figure 1 to Figure 4 The shown nitrogen-doped titanium oxide / carbon nanocomposite is prepared by the following method:

[0027] 1) Add 10 mL of tetramethylammonium hydroxide solution into 30 mL of ethylene glycol and stir for 10 min, then add 1 mL of titanium isopropoxide, and stir for 0.5 h at room temperature to obtain a uniform solution.

[0028] 2) Transfer the homogeneous solution obtained in step 1) into a polytetrafluoroethylene with a volume of 80mL

[0029] In the inner lining of the hydrothermal kettle, after sealing it with a stainless steel jacket, it was hydrothermally reacted at 200 ° C for 8 hours, and it automatically

[0030] Then cool to room temperature.

[0031] 3) Use acetone, alcohol and deionized water to centrifuge and wash once respectively the obtained in step 2).

[0032] The reaction product was dried in air at 70°C for 10 hours.

[0033] 4) heat-treating the dried product obtained in step 3). The heat treatment temperatu...

Embodiment 2

[0041] A nitrogen-doped titanium oxide / carbon nanocomposite is prepared by the following method:

[0042] 1) Add 10 mL of tetramethylammonium hydroxide solution into 30 mL of ethylene glycol and stir for 10 min, then add 1 mL of titanium isopropoxide, and stir for 0.5 h at room temperature to obtain a uniform solution.

[0043] 2) Transfer the homogeneous solution obtained in step 1) into a polytetrafluoroethylene with a volume of 80mL

[0044] In the inner lining of the hydrothermal kettle, after sealing it with a stainless steel jacket, it was hydrothermally reacted at 200 ° C for 8 hours, and it automatically

[0045] Then cool to room temperature.

[0046] 3) Use acetone, alcohol and deionized water to centrifuge and wash once respectively the obtained in step 2).

[0047] The reaction product was dried in air at 70°C for 10 hours.

[0048] 4) heat-treating the dried product obtained in step 3). The heat treatment temperature is 350°C, the heat

[0049] The treatment ti...

Embodiment 3

[0052] a kind of like Figure 5 to Figure 8 The nitrogen-doped titanium oxide shown was prepared by the following method:

[0053] 1) Add 10 mL of tetramethylammonium hydroxide solution into 30 mL of ethylene glycol and stir for 10 min, then add 1 mL of titanium isopropoxide, and stir for 0.5 h at room temperature to obtain a uniform solution.

[0054] 2) Transfer the homogeneous solution obtained in step 1) into a polytetrafluoroethylene with a volume of 80mL

[0055] In the inner lining of the hydrothermal kettle, after sealing it with a stainless steel jacket, it was hydrothermally reacted at 200 ° C for 8 hours, and it automatically

[0056] Then cool to room temperature.

[0057] 3) Use acetone, alcohol and deionized water to centrifuge and wash once respectively the obtained in step 2).

[0058] The reaction product was dried in air at 70°C for 10 hours.

[0059] 4) heat-treating the dried product obtained in step 3). The heat treatment temperature is 450°C, the hea...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/08
Inventor 王智宇王佳钱国栋樊先平
Owner ZHEJIANG UNIV
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