Preparation of high photocatalysis activity titanium dioxide nano-stick by non-hydrosol-gel method and surface thereof functionalization

A technology of titanium dioxide and nanorods, applied in the field of nanomaterials, can solve problems such as difficult expansion of production scale, limited reaction output, complicated process, etc., and achieve the effect of convenient large-scale production, low cost and stable quality

Inactive Publication Date: 2008-09-17
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among these methods, both the hydrothermal method and the solvothermal method are carried out at high temperature and high pressure, and the reaction yield is easily limited by the equipment, and it is not easy to expand the production scale.
Other preparation methods have complex processes, and the

Method used

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  • Preparation of high photocatalysis activity titanium dioxide nano-stick by non-hydrosol-gel method and surface thereof functionalization
  • Preparation of high photocatalysis activity titanium dioxide nano-stick by non-hydrosol-gel method and surface thereof functionalization
  • Preparation of high photocatalysis activity titanium dioxide nano-stick by non-hydrosol-gel method and surface thereof functionalization

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Experimental program
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Effect test

Embodiment 1

[0021] Under vigorous stirring, titanium tetrachloride was gradually added to benzyl alcohol to form a solution, in which the titanium content was 0.4 mol / liter, and then the white emulsion was left to stand at 80°C for 70 hours to completely hydrolyze the titanium dioxide, and the reaction ended A white precipitate was obtained by centrifugation, washed with chloroform, and then dried at 50° C. to obtain white anatase titanium dioxide nanorods.

Embodiment 2

[0023] Get a certain amount of benzyl alcohol, add L-hydroxyproline and stir to make it dissolve completely, the concentration of L-hydroxyproline is 0.05 mol / liter. Then, under vigorous stirring, titanium tetrachloride was gradually added to the above benzyl alcohol mixture to form a white emulsion, wherein the titanium content was 0.7 mol / liter, and then the white emulsion was left to stand at 60°C for 80 hours , to completely hydrolyze the titanium dioxide, centrifuge to obtain a white precipitate at the end of the reaction, wash the white precipitate with chloroform, and then dry it at 50 degrees to obtain white anatase titanium dioxide nanorods modified with L-hydroxyproline.

Embodiment 3

[0025] Under vigorous stirring, titanium tetrachloride was gradually added to benzyl alcohol to form a white emulsion, in which the titanium content was 0.7 mol / liter, and then the white emulsion was left to stand at 100°C for 60 hours to completely hydrolyze the titanium dioxide At the end of the reaction, a white precipitate was obtained by centrifugation, washed with chloroform, and then dried at 50 degrees to obtain white anatase titanium dioxide nanorods.

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Abstract

The invention provides a non-hydrosol-gel preparation method of titanium-dioxide nanorods, which can realize the online functionlization of the titanium-dioxide nanorods. The invention uses phenyl carbinol as the reaction media, and titanium tetrachloride directly dissolves in the phenyl carbinol. By the hydrolyzation of the titanium tetrachloride in phenyl carbinol under low temperature, the high activity titanium-dioxide nanorods are compounded at once. The functionlization reagent, which is added into the reaction system, realizes the online functionlization of the titanium-dioxide nanorods, which improves the photo-catalysis activity of the titanium-dioxide nanorods. The non-hydrosol-gel preparation method has the advantages that: the method is sample; the preparation process runs under the temperature of 40 to 100 centidegrees; the granularity of the titanium-dioxide, produced by the method, is homogeneously distributed; the crystal structure is uniform anatase ; the technical process is easy to controlled; the product quality is stable; the non-hydrosol-gel preparation method is suit for mass production.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and mainly relates to the preparation and surface functionalization of titanium dioxide nanorods. Background technique [0002] Titanium dioxide, commonly known as titanium dioxide, is a well-studied functional fine inorganic material, and is an important ceramic, semiconductor and catalytic material. Titanium dioxide can be used to produce advanced coatings, catalysts and catalyst carriers, cosmetics, and ultraviolet absorbers because of its unique properties such as good weather resistance, chemical corrosion resistance, high chemical stability, thermal stability, non-toxicity, and photosensitivity. , special glass, electronic ceramics, structural ceramics and other fine ceramics. Anatase titanium dioxide has strong photocatalytic activity and is widely used in the treatment of wastewater and pollutants. [0003] The catalytic activity of titania is not only related to its crystal...

Claims

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Application Information

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IPC IPC(8): C01G23/053B01J21/06B82B3/00
Inventor 张礼知贾会敏贾法龙
Owner HUAZHONG NORMAL UNIV
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