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Preparation method based on photocatalytic activity for titanium dioxide nanofibers

A technology of photocatalytic activity and titanium dioxide, which is applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems such as no research reports, speed up the pace of use, reduce pollution control costs, and reduce secondary pollution effect

Inactive Publication Date: 2014-01-01
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The preparation of titanium dioxide nanofibers by hydrothermal method reported at home and abroad only studied the influence of alkali concentration, reaction time and reaction temperature on the preparation of titanium dioxide nanofibers by hydrothermal method. effect, there is no research report

Method used

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  • Preparation method based on photocatalytic activity for titanium dioxide nanofibers
  • Preparation method based on photocatalytic activity for titanium dioxide nanofibers
  • Preparation method based on photocatalytic activity for titanium dioxide nanofibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Pure anatase TiO 2 The powder is the precursor, weigh 6.7113g TiO 2 Powder, mixed with 50ml of 10mol / L NaOH aqueous solution, stirred for 30min. Take 12ml of the obtained solution and transfer it to a high-pressure reaction kettle with a capacity of 20ml, carry out hydrothermal treatment at 170°C for 72h, wash the obtained product with water until the pH is 7, filter, dry at 80°C, and calcinate at 600°C for 2h to obtain figure 1 The titanium dioxide nanofibers shown have a fiber diameter of about 30-100 nm and a length of about 3-8 μm.

[0021] Figure 5 is the XRD pattern of the titanium dioxide nanofiber sample prepared under the above process conditions. The diffraction peak marked R in the figure is related to TiO 2 (Rutile phase) The data on the standard PDF card is in good agreement, belonging to the rutile phase TiO 2 The diffraction peaks of A, the rest of the diffraction peaks marked with A and TiO 2 (Anatase phase) The data on the standard PDF card is in...

Embodiment 2

[0023] Pure anatase TiO 2 The powder is the precursor, weigh 6.6893g TiO 2 Powder, mixed with 50ml of 12mol / L NaOH aqueous solution, stirred for 30min. Take 12ml of the obtained solution and transfer it to a high-pressure reactor with a capacity of 20ml, carry out hydrothermal treatment at 170°C for 48h, wash the obtained product with water until the pH is 7, filter, dry at 80°C, and calcinate at 600°C for 2h to obtain a product with a diameter of approximately 30-100nm, titanium dioxide nanofibers with a length of about 3-8μm.

Embodiment 3

[0025] Pure anatase TiO 2 The powder is the precursor, weigh 6.7042g TiO 2 powder, mixed with 50ml of NaOH aqueous solution with a concentration of 8mol / L, and stirred for 30min. Take 12ml of the obtained solution and transfer it to a high-pressure reactor with a capacity of 20ml, carry out hydrothermal treatment at 190°C for 24 hours, wash the obtained product with water until the pH is 7, filter, dry at 80°C, and calcinate at 600°C for 2 hours to obtain a product with a diameter of approximately 30-100nm, titanium dioxide nanofibers with a length of about 3-8μm.

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Abstract

The invention discloses a preparation method for titanium dioxide nanofibers on the basis of photocatalytic activity. According to the preparation method, in order to prepare uniform and slender titanium dioxide nanofibers, the charging coefficient of a reaction kettle is controlled to be 0.55 to 0.65 during the process of preparing the titanium dioxide nanofibers by adopting a hydrothermal method; the preparation method lays the foundation of mass production of the titanium dioxide nanofibers, and the actual use of the titanium dioxide nanofibers on the aspect of organic pollutant degradation through photocatalysis is quickened.

Description

technical field [0001] The invention relates to a method for preparing nano titanium dioxide, in particular to a method for preparing titanium dioxide nanofibers through a hydrothermal method. Background technique [0002] Nano-titanium dioxide has good photocatalytic properties. It can decompose organic matter into non-polluting carbon dioxide and water under ultraviolet light irradiation, and has the characteristics of non-toxic, harmless, non-corrosive, strong catalytic ability, low cost, and reusable. . However, the powdery nano-titanium dioxide photocatalyst has defects such as easy aggregation, easy deactivation, and difficult recovery after use, which severely limits its application range. Titanium dioxide nanofibers have a large specific surface area and strong adsorption capacity, which can improve their photocatalytic performance, and in the process of treating pollutants, titanium dioxide nanofibers are easier to recycle, which greatly reduces the cost of polluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B01J21/06B01J35/06
Inventor 李巧玲景红霞万郁楠叶云
Owner ZHONGBEI UNIV
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