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Method of preparing anatase structured highlight catalytic active nano-TiO2

A catalytic activity, anatase technology, applied in the field of photocatalysts and solar cells, can solve the problems of small specific surface area and achieve the effect of high photocatalytic activity

Inactive Publication Date: 2008-12-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the most commonly used commercial nano-titanium dioxide is P-25, which is a mixed crystal of rutile and anatase, with a larger grain size of 20nm and a smaller specific surface area of ​​50m 2 g -1 , there are certain limitations when used as a photocatalyst

Method used

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  • Method of preparing anatase structured highlight catalytic active nano-TiO2
  • Method of preparing anatase structured highlight catalytic active nano-TiO2
  • Method of preparing anatase structured highlight catalytic active nano-TiO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Add 7ml of tetrabutyl titanate (TEOT) and 4.6ml of glacial acetic acid into a four-necked flask, and at the same time add 10ml of absolute ethanol as a solvent, and stir to obtain a clear light yellow solution 1;

[0025] (2) Weigh polyethylene glycol (PEG4000) and cetyltrimethylammonium bromide (CTAB) as a double-template agent so that the molar ratio is 1:4 respectively; add 15ml of absolute ethanol solvent (template agent The mass ratio with absolute ethanol is 1:10), stirring to dissolve the template agent to obtain solution 2;

[0026] (3) Mix solution 2 with solution 1 in the four-necked flask, add 1.44ml of water, and carry out the whole reaction at room temperature. After stirring for 10 hours to clarify, transfer the solution to a crystallization tank and place it in a constant temperature box at 60°C. Let stand for 3 days to form a gel, and dry at 80°C for 24 hours;

[0027] (4) The dry powder was roasted in a muffle furnace at 450° C. for 3 hours, and fi...

Embodiment 2

[0030] Titanium dioxide powder was obtained in the same manner as described in Example 1, except that the molar ratio of template agent polyethylene glycol (PEG4000) to cetyltrimethylammonium bromide (CTAB) was changed to 1:6.

[0031] The properties of this powder were measured and shown in Table 1.

Embodiment 3

[0033] Titanium dioxide particles were obtained in the same manner as described in Example 1, except that the molar ratio of template agent polyethylene glycol (PEG4000) to cetyltrimethylammonium bromide (CTAB) was changed to 1:2.

[0034] The properties of this powder were measured and shown in Table 1.

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Abstract

The invention discloses a preparation method for a high photo-catalytic activity nano-TiO2 with anatase structure, which comprises the following steps: (1) weighing organic titanium compounds or titanium inorganic salt which is dissolved in glacial acetic acid to prepare the mixed solution and dissolving the mixed solution in anhydrous alcohol to obtain solution 1; (2) selecting two or three templates, dissolving the templates in the anhydrous alcohol to obtain solution 2; (3) mixing the solution 1 and solution 2, adding distilled water, stirring, obtaining settled solution, standing for 2-5 days, forming gel and drying; (4) calcining the dried matter to remove the templates and obtaining the high photo-catalytic activity nano-TiO2 with anatase structure. The high photo-catalytic activity nano-TiO2 with anatase structure prepared by the method of the invention has smaller grain diameter smaller, larger specific surface and higher photo-catalytic activity than P-25, which can be widely used in the fields such as photocatalysis and sensitized solar batteries.

Description

technical field [0001] The invention relates to the fields of solar cells and photocatalysts. In particular, it relates to a preparation method of a nanometer material. Background technique [0002] Nano-TiO 2 As an important semiconductor material, it is widely used in photocatalysis, solar cells and other fields due to its high photocatalytic activity, stable chemical properties, and non-toxicity. Nano-titanium dioxide materials with anatase and rutile structures are currently widely used nanomaterials, among which anatase nano-titanium dioxide has high photocatalytic activity and is used for catalytic degradation of organic pollutants or photocatalysts in solar energy systems. [0003] At present, there are many methods for preparing nano-titanium dioxide, such as sol-gel method, hydrothermal method, solvothermal method and so on. Among them, the template method plays an important role in the preparation of nano-oxides with different surface areas and crystallinity. We...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C01G23/047
Inventor 王富民郭克伦孙高奎张旭斌蔡旺峰
Owner TIANJIN UNIV
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