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Sunlight-induced method for preparing fasciculate rutile titanium dioxide

A technology of rutile type and titanium dioxide, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems that pure rutile has not been reported, and achieve the effect of high purity, simple preparation process and low preparation temperature

Active Publication Date: 2012-07-11
嘉善县国创新能源研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many reports on the preparation of rutile at low temperature at home and abroad, there are no reports on the preparation of pure rutile directly under outdoor sunlight.

Method used

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  • Sunlight-induced method for preparing fasciculate rutile titanium dioxide
  • Sunlight-induced method for preparing fasciculate rutile titanium dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Fix a three-neck bottle with a capacity of 500mL in an ice-water bath, measure pure water (H 2 (2) 200mL packs in the there-necked bottle; On the middle port of the there-necked bottle, condenser is installed, utilizes running water to condense; On a side port of the there-necked bottle, a thermometer is installed to monitor and control the temperature of the reaction system; Get commercially available titanium tetrachloride ( TiCl 4 ) 100mL into a dry dropping funnel, and the dropping funnel is installed on the other side port of the there-necked flask; under the conditions of magnetic stirring and ice-water bath cooling, open the switch of the dropping funnel, and slowly dissolve the titanium tetrachloride solution Add dropwise into pure water, the dropping speed is controlled at 4mL / min, the stirring speed is controlled at 800 rpm, and the temperature of the ice-water bath is controlled at 0-5°C during the whole dropping process; with the addition of titanium tet...

Embodiment 2

[0042] (1) adopt the device equipment and operating steps of step (1) in embodiment 1, prepare TiCl by the same method4 The sol was aged at room temperature for 48 hours.

[0043] (2) Measure 48mL of pure water into a 100mL colorless transparent glass bottle, and then add aged TiCl 4 sol 8mL, fully stirred, the solution is colorless; put it outdoors in a spacious place with sufficient sunlight, the outdoor temperature is 10-20°C, and the relative humidity is 50-60%. After 5 days, a small amount of white particles begin to appear. A large amount of white precipitate appeared in the day;

[0044] (3) The resulting precipitate was filtered, washed with pure water, and dried in an oven at 70° C. to obtain 0.426 g of beam-shaped rutile-type titanium dioxide powder.

Embodiment 3

[0046] (1) adopt the device equipment and operating steps of step (1) in embodiment 1, prepare TiCl by the same method 4 The sol was aged at room temperature for 48 hours.

[0047] (2) Measure 48mL of pure water into a 100mL colorless transparent glass bottle, and then add aged TiCl 4 sol 4mL, fully stirred, the solution is colorless; put it outdoors in a spacious place with sufficient sunlight, the outdoor temperature is 10-20°C, and the relative humidity is 50-60%. After 7 days, a small amount of white particles begin to appear. A large amount of white precipitate appeared in the day;

[0048] (3) The obtained precipitate was filtered, washed with pure water, and dried in an oven at 70°C to obtain 0.137 g of beam-shaped rutile-type titanium dioxide powder.

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Abstract

The invention discloses a sunlight-induced method for preparing fasciculate rutile titanium dioxide at room temperature. The method comprises the following steps of: forming a hydrosol by using titanium tetrachloride and water; diluting the hydrosol by adding water after the hydrosol is fully aged; obtaining a large number of white precipitates through sunlight irradiation outdoors; and filtering, washing and drying the obtained white precipitates to obtain fasciculate rutile titanium dioxide powder. The sunlight-induced method for preparing the fasciculate rutile titanium dioxide, disclosed by the invention, has the main advantages that: the crystal form of titanium dioxide is rutile, the purity of the titanium dioxide is high, and the calcination is not needed; the temperature for preparation is low, the heating is not needed, and the adding of other reagents or seed crystals is not needed; the preparation is carried out under normal pressure; only the sunlight irradiation is needed, so that the method has low carbon and energy-saving performance; and the preparation process is simple and is easy in operation.

Description

(1) Technical field [0001] The invention relates to a method for preparing beam-shaped rutile titanium dioxide induced by sunlight. (2) Background technology [0002] Titanium dioxide (TiO 2 ) is a cheap, safe, non-toxic and extremely stable semiconductor photocatalytic material. , photocatalysts, cosmetics, advanced coatings, white pigments and environmental purification and other fields have been widely used. [0003] In nature, TiO 2 It has three crystal forms of brookite, anatase and rutile. Among them, rutile is a high-temperature thermodynamically stable phase, which has a large dielectric constant, a high refractive index, good ultraviolet shielding performance and strong crushing resistance. Generally, there are two main ways to synthesize rutile. One is to obtain it through high-temperature calcination, and the powder undergoes the transformation process of amorphous-anatase-rutile. Usually, the transition temperature from anatase to rutile is 400-1000°C, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047
Inventor 李国华张炫辉
Owner 嘉善县国创新能源研究院
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