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Preparation method of self-doped titanium dioxide nanorod

A technology of titanium dioxide and nanorods, which is applied in the field of preparation of self-doped titanium dioxide nanorods, to avoid the influence of shape and stability, high visible light photocatalytic activity, and simple equipment

Inactive Publication Date: 2013-08-14
ZHANJIANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing self-doped titanium dioxide nanorods, which does not require the preparation of TiO 2 , and then use the reducing gas in the tube furnace to reduce the complex process of preparing self-doped titanium dioxide, and solve the problem of high temperature treatment on the shape and stability of the product, which has the advantages of simple preparation process, low cost, fast and energy saving and high efficiency, the self-doped TiO prepared by this preparation method 2 The size of nanorods is controllable and uniform, with an average length of 50-80 nm and an average diameter of 8-15 nm. The self-doped TiO 2 Nanorod products are expected to be widely used in fields such as photolysis of water to produce hydrogen and degradation of organic pollutants

Method used

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  • Preparation method of self-doped titanium dioxide nanorod
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  • Preparation method of self-doped titanium dioxide nanorod

Examples

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Embodiment 1

[0028] Example 1: In a 250 ml beaker, 4 ml of hydrazine (N 2 H 4 ?H 2 O, 80%) and 62 ml ethylene glycol (C 2 H 6 O 2 ), magnetically stirred for 10 min, and then slowly add 4 ml of butyl titanate (Ti(OC 4 H 9 ) 4 ), that is, the volume ratio of butyl titanate:hydrazine:ethylene glycol is 1:1:15.5, stirred vigorously for 30 minutes, and then transferred to a 100ml hydrothermal reactor lined with tetrafluoroethylene and placed in a constant temperature of 200 ℃ In the dry box, keep the reaction for 24 h under solvothermal conditions. After the reaction, it was naturally cooled to room temperature, washed with distilled water and absolute ethanol three times each, and the product was placed in a 70 ℃ drying box for vacuum drying for 24 hours. The titanium dioxide nanorods prepared by this step are about 70-80 nm long and 10-15 nm wide.

Embodiment 2

[0029] Example 2: In a 250 ml beaker, 6 ml of hydrazine (N 2 H 4 ?H 2 O, 80%) and 60 ml ethylene glycol (C 2 H 6 O 2 ), magnetically stirred for 10 min, and then slowly add 4 ml of butyl titanate (Ti(OC 4 H 9 ) 4 ), that is, the volume ratio of butyl titanate:hydrazine:ethylene glycol is 1:1.5:15, stirred vigorously for 60 minutes, and then transferred to a 100 ml hydrothermal reactor lined with tetrafluoroethylene and placed at 200 ℃ In a constant temperature drying oven, keep the reaction for 24 h under solvothermal conditions. After the reaction is over, cool to room temperature naturally, wash with distilled water and absolute ethanol three times each, and place the product in a drying oven at 80 ℃ for vacuum drying for 12 h. The titanium dioxide nanorods prepared by this step are about 70-80 nm long and 10-15 nm wide.

Embodiment 3

[0030] Example 3: Add 12 ml of hydrazine in a 250 ml beaker (N 2 H 4 ?H 2 O, 80%) and 54 ml ethylene glycol (C 2 H 6 O 2 ), magnetically stirred for 10 min, and then slowly add 4 ml of butyl titanate (Ti(OC 4 H 9 ) 4 ), the volume ratio of butyl titanate: hydrazine: ethylene glycol is 1: 3:13.5, stir vigorously for 15 minutes, then transfer to a 100 ml hydrothermal reactor lined with tetrafluoroethylene, and put it in a constant temperature of 200 ℃ In the dry box, keep the reaction for 24 h under solvothermal conditions. After the reaction, it was cooled to room temperature naturally, washed with distilled water and absolute ethanol three times each, and the product was placed in a drying oven at 60 ℃ for vacuum drying for 18 h. The titanium dioxide nanorods prepared by this step are about 60-80 nm in length and 10-15 nm in width.

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Abstract

The invention provides a preparation method of a self-doped titanium dioxide nanorod. The method comprises the following steps of: adding butyl titanate [Ti(OC4H9)4] into liquor of hydrazine (N2H4.H2O) and ethylene glycol (C2H6O2); powerfully stirring; then, transferring to a reaction kettle lined with polyvinyl fluoride; maintaining the constant temperature at 200 DEG C for 12-24 hours; naturally cooling to room temperature; and filtering, washing and drying to obtain the self-doped titanium dioxide nanorod provided by the invention. According to the method provided by the invention, self-doped titanium dioxide is directly reduced in a liquid phase without thermal reduction treatment. The preparation method is simple in process, and the self-doped TiO2 nanorod is controllable in size and uniform in dimension, and the average length is 50-80nm and the average diameter is 8-15nm. The self-doped titanium dioxide nanorod prepared by the method provided by the invention is expected to be widely applied to the fields of hydrogen generation by photolysis of water, degradation of organic pollutants and the like.

Description

Technical field [0001] The invention relates to a preparation method of titanium dioxide nanorods, in particular to a preparation method of self-doped titanium dioxide nanorods. Background technique [0002] Environmental pollution is a major problem that plagues the economic development of the world today. The extensive use of fossil fuels not only causes huge pollution to the global environment and ecology, but these energy sources are non-renewable resources, and the global storage content is estimated to be exhausted by the middle of this century. Therefore, how to solve the environmental pollution problem is extremely urgent. Since Honda and Fujishima discovered TiO in 1972 2 Since the single crystal electrode has a certain degree of redox performance under the action of light, scientists have proposed an efficient and energy-saving solution to solve the problem of environmental pollution: using sunlight to decompose organic pollutants. [0003] Traditional semiconductor pho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06
Inventor 周小松金蓓徐旭耀
Owner ZHANJIANG NORMAL UNIV
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