Method for preparing rutile type titanium dioxide nanorod microsphere

Abstract

The invention relates to a method for preparing a rutile type titanium dioxide nanorod microsphere. The method comprises the following steps of (1) mixing concentrated hydrochloric acid, deionized water and non-polar solvent, adding titanium alkoxide in the mixed solvent drop by drop under a magnetic stirring condition, after the titanium alkoxide is added, continuously stirring the mixture for 30-60 minutes, so that the titanium alkoxide can be fully hydrolyzed to form layered mixed solution; and (2) transferring the mixed solution to a high pressure reaction kettle to perform solvothermal reaction, after the reaction is finished, naturally cooling the high pressure kettle by placing the reaction kettle at a room temperature, and repeatedly washing and centrifugally separating the obtained precipitate to obtain the titanium dioxide nanorod microsphere. According to the method provided by the invention, the solvothermal reaction is carried out in the interface of polar / non-polar solution by adopting the titanium alkoxide, the process route is simple and convenient, no surfactant is required; the prepared titanium dioxide nanorod microsphere is good in dispersion, high in degree of crystallinity, large in specific area, and can be used in various fields of photochemical catalyst, paints, cosmetics, new energy and the like.

Description

technical field [0001] The invention belongs to the field of titanium dioxide preparation, in particular to a preparation method of rutile titanium dioxide nanorod microspheres. Background technique [0002] Since 1972, Japanese scientists Fujishima and Honda published in Nature magazine about TiO 2 Since the paper on the photo-splitting of water on electrodes, TiO 2 Powders have attracted widespread attention from scientists in the fields of international chemistry, physics and materials science. Nano-TiO 2 The powder is non-toxic, cheap, and chemically stable, and is widely used in energy materials, photocatalysts, and gas sensors for sensors. TiO 2 There are three crystal forms in nature: Rutile, Anatase and Brookite. Although anatase titanium dioxide has been widely used in recent years, rutile titanium dioxide also has its own advantages: higher refractive index, dielectric constant and electrical resistance, lower production cost, and more chemically stable. [0...

AI Technical Summary

Problems solved by technology

In recent years, there have been many studies on the preparation of titanium oxide microspheres by self-assembly of nano-sized grains, but titanium oxide microspheres prepared by self-assembly of nanorods are relatively rare.

Lu Liu et al. used titanium trichloride and surfactant Span 80 to prepare rutile phase titanium oxide nanorod microspheres, but the particle size range of the titanium oxide microspheres they prepared was too wide and the morphology was not uniform (Lu Liu et al. al.Nanotechnology, 2006, 175046-5050)

Sha Tian et al. used titanium trichloride, sodium oxalate and ethylene glycol to synthesize titanium oxide nanorod microspheres through solvothermal, but the microspheres they prepared had a mixed crystal structure, the reaction temperature of the system was high, and the holding time was long. Therefore, the energy consumption is large, which is not conducive to large-scale production (Sha Tian et al. Applied Physics A: Materials Science & Processing, 2011, 104, 149–158)

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