Method for preparing novel porous honeycomb mesoporous titanium dioxide material

A technology of mesoporous titanium dioxide and titanium dioxide, which is applied in the directions of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problem of difficult removal of template agents, and achieves remarkable photocatalytic effect, adjustable volume and preparation method. simple effect

Inactive Publication Date: 2010-09-15
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for preparing novel porous honeycomb mesoporous titanium dioxide material

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Effect test

Embodiment 1

[0028] Preparation of porous honeycomb mesoporous titania without template:

[0029] Add 21mL of ethanol and 22mL of glacial acetic acid into the reaction vessel equipped with a distillation device, and stir evenly to form a transparent solution. Slowly add 10 mL of titanium tetrachloride dropwise to the above transparent solution at room temperature while stirring, and the addition is completed in about 1 h. After the addition, a light yellow-green transparent solution was obtained. After stirring for 0.5 h, the temperature was raised and the solvent was slowly evaporated, and hydrochloric acid was recovered at the same time. The Tyndall phenomenon can be observed when the solvent is evaporated to a viscous state. Continue to raise the temperature until bubbling begins, maintain the temperature until the bubbling state is evaporated to dryness, and the temperature is lower than 120°C, and a white titanium dioxide bulky solid with a honeycomb-like pore structure is obtained, ...

Embodiment 2

[0031] Add template to prepare porous honeycomb mesoporous titania:

[0032] Add 1 g of cetyltrimethylammonium bromide, 21 mL of ethanol and 22 mL of glacial acetic acid into a reaction vessel equipped with a distillation device, and stir evenly to form a transparent solution. Slowly add 10 mL of titanium tetrachloride dropwise to the above transparent solution at room temperature while stirring, and the addition is completed in about 1 h. After the addition, a light yellow-brown transparent solution was obtained. After stirring for 0.5 h, the temperature was raised and the solvent was slowly evaporated, and hydrochloric acid was recovered at the same time. The Tyndall phenomenon can be observed when the solvent is evaporated to a viscous state. Continue to raise the temperature until bubbling begins, maintain the temperature until the bubbling state is evaporated to dryness, and the temperature is lower than 120°C, and a white titanium dioxide bulky solid with a honeycomb-li...

Embodiment 3

[0035] Preparation of porous honeycomb mesoporous titania without template:

[0036] Add 26mL of glacial acetic acid into the reaction vessel equipped with a distillation device, slowly add 20mL of tetrabutyl titanate dropwise to the above liquid under the condition of cooling in a water bath, and stir at the same time, and the addition is completed in about 1 hour. After the addition, a light yellow-green transparent solution was obtained. After stirring for 1.0 h, the temperature was raised and the solvent was slowly evaporated. The Tyndall phenomenon can be observed when the solvent is evaporated to a viscous state. Continue to raise the temperature until bubbling begins, maintain the temperature until the bubbling state is evaporated to dryness, and the temperature is lower than 120°C, and a white titanium dioxide bulky solid with a honeycomb-like pore structure is obtained, and the diameter of the large pores is about 1-3mm. The solid is brittle, about 9g. After calcini...

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Abstract

The invention discloses a method for preparing a novel porous honeycomb mesoporous titanium dioxide material, which relates to a method for preparing a mesoporous titanium dioxide material, and belongs to the technical field of a titanium dioxide photocatalyst. Organic acid and alcohol and an inorganic titanium source of C2-C9, and organic acid and an organic titanium source of C2-C9 are used as the raw materials in the method. The method comprises the following steps: uniformly mixing the organic acid and the titanium source in the molar ratio of 1-10:1, reacting for 0.5-1.0h at the temperature of 10 DEG C-80 DEG C, and evaporating the solvent to obtain a honeycomb puffing solid; roasting for 1-5h at the temperature of 200-700 DEG C to obtain the porous honeycomb mesoporous titanium dioxide material. The invention has the advantages of easily obtained raw materials, simple preparation method, short preparation time, and no need of adding templates. The obtained mesoporous titanium dioxide has both visible pores and the mesopores, the distribution of pore diameters is narrow, the micropore diameter is 20-30nm, and the specific area is 90-160m<2>/g. The mesoporous titanium dioxide material has certain hardness, is easy to separate from liquid phase, can achieve good separation effect by decantation, has high photocatalytic activity, and is especially suitable for the fields of photocatalysis.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide photocatalysts, and in particular relates to a preparation method of porous honeycomb mesoporous titanium dioxide, especially a preparation method in which visible pores and mesoporous pores exist simultaneously. technical background [0002] Nano-titanium dioxide is a non-toxic and harmless semiconductor. Under the irradiation of ultraviolet light, it can generate photo-generated electrons and photo-generated holes. Photo-generated electrons have strong reducing ability, and photo-generated holes have strong oxidation ability. Decomposes and purifies inorganic and organic wastewater such as ammonia, amines, phenols, etc., and has a killing effect on bacteria. For example, JP2-9850B discloses the use of titanium dioxide to decompose harmful substances in waste. Nano-titanium dioxide also has excellent corrosion resistance and light corrosion resistance, and has broad application prospect...

Claims

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Application Information

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IPC IPC(8): C01G23/053B01J21/06B01J35/04
Inventor 姚淑华张晓艳石中亮
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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