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Method for preparing anatase-shaped nano TiO2

An anatase-type, nano-titanium dioxide technology, applied in the direction of nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problems of particle agglomeration and achieve the effect that it is not easy to agglomerate

Active Publication Date: 2010-03-17
XIAN RUILIAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The sol-gel method (Sol-Gel method) in the liquid phase method utilizes the hydrolysis of metal alkoxide and the sol-gel method of polycondensation, as a kind of effective method for preparing nanopowder, has synthesized the homogeneity better TiO 2 Gel and Nano TiO 2 particles, but the nano-TiO prepared by this method 2 Severe particle agglomeration

Method used

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  • Method for preparing anatase-shaped nano TiO2
  • Method for preparing anatase-shaped nano TiO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Tetra-n-butyl titanate Ti(OC 4 h 9 )4 as TiO 2 The precursor of absolute ethanol (C 2 h 5 OH) as an organic solvent, by changing the preparation conditions to prepare suspension-type TiO 2 nanocatalyst materials. 50g Ti(OC 4 h 9 ) 4 Dissolved in 25g of absolute ethanol to obtain uniformly mixed Ti(OC 4 h 9 ) 4 / ethanol solution, and adjust the pH value to about 5.5 with hydrochloric acid solution, then slowly add 5g of distilled water, and continuously stir for 4 hours to obtain a transparent sol, which becomes a transparent solid after aging for 24 hours, and dried in an oven at 125°C for 6 hours to become a white solid particle ;Pour the powder into a crucible, pass argon gas for 5 minutes to reach saturation, put the crucible in a muffle furnace, turn on the heating, and roast at 500°C for 1 hour to obtain TiO 2 powder. The obtained TiO 2 It is a small white particle with high hardness and is difficult to grind. Its particle size is relatively large and ...

Embodiment 2

[0033] 50g Ti(OC 4 h 9 ) 4 Proportionally dissolved in 250g of absolute ethanol to obtain uniformly mixed Ti(OC 4 h 9 ) 4 / ethanol solution, and adjust the pH value to about 5.5 with hydrochloric acid solution, then slowly add 5g of distilled water, and continuously stir for 4 hours to obtain a transparent sol, which becomes a transparent solid after aging for 24 hours, and dried in an oven at 125°C for 6 hours to become a white solid particle ;Transfer the granules to a beaker, add 150g of water, ultrasonically oscillate for 30min, let stand for 2h, filter to remove most of the water, and then put it in an oven again to dry at 125°C for 3h to obtain a crisp and self-colored solid; pour the powder into a crucible In the process, the crucible was placed in the muffle furnace after being saturated with argon for 5 minutes, the heating was turned on, and the TiO was obtained by roasting at 500°C for 1 hour. 2 powder. The TiO obtained in this way 2 The photocatalytic materi...

Embodiment 3

[0035] 20g Ti(OC 4 h 9 ) 4 Proportionally dissolved in 20g of absolute ethanol to obtain uniformly mixed Ti(OC 4 h 9 ) 4 / anhydrous ethanol solution, and adjust the pH value to about 5.5 with hydrochloric acid solution, then slowly add 2g of distilled water, and continuously stir for 4 hours to obtain a transparent sol. White solid particles; transfer the particles to a beaker, add 20g of water, oscillate ultrasonically for 30 minutes, let it stand still, filter to remove most of the water, and then put it in an oven to dry at 100°C for 3 hours to obtain a white powder; pour the powder into a crucible In the process, the crucible was placed in the muffle furnace after being saturated with argon for 5 minutes, the heating was turned on, and the TiO was obtained by roasting at 500°C for 1 hour. 2 powder. The results of various physical characterizations show that the physical properties of nano-titanium dioxide prepared by this method are consistent with those in Example ...

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Abstract

The invention relates to a method for preparing anatase-shaped nano TiO2 by combining a sol-gel method and a second hydrolysis method, comprising the following steps: adopting tetrabutyl titanate as aprecursor of TiO2, adopting alcohol as an organic solvent and adjusting the pH value between 4 and 7 by inorganic acid; then dropwise adding distilled water and continuously stirring to obtain transparent sol; ageing, drying and then obtaining a loose solid particle; adding distilled water into the prepared gel solid particle; after carrying out ultrasonic wave oscillation, standing and filteringto obtain white powder; and roasting to prepare nano TiO2 powder. An SEM scanned image displays that all powder crystal grains are in a branch-shaped structure, and a TEM image and a grain size analyzer test display that the crystal grain size of the TiO2 is in a nano level. The method has simple process, safe operation, less environmental pollutant discharge, small crystal grain size of a product, difficult conglobation and stable quality and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a new method for preparing nano-titanium dioxide, in particular to the preparation of anatase-type nano-titanium dioxide photocatalyst, and belongs to the field of fine chemical industry. Background technique [0002] With the deepening of research on nanomaterials, nano-assembly systems and artificially assembled nanostructure material systems have attracted more and more attention. This means that research on nanomaterials can design, assemble, and create new systems according to people's wishes. It is more purposeful to make the system have the desired characteristics, a technological leap, and further open the market door for the application of nanomaterials, forming a large number of high-tech products in a wide range of fields. [0003] Nano-TiO 2 It is an N-type semiconductor with a forbidden band width of 3.0eV, which belongs to the excitation range of ultraviolet light (below 380nm). TiO 2 Electrons on the valence ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82B3/00
Inventor 吴梅杨永忠高仁孝刘骞峰刘晓春陈谦王建文霍东升李涛徐云侠房发俐
Owner XIAN RUILIAN NEW MATERIAL CO LTD
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