Method for preparing small-diameter anatase nano-titanium dioxide

Abstract

The invention belongs to the field of fine chemical engineering and in particular relates to a simple method for preparing small particle size anatase nano TiO2. The method comprises the following steps: by adopting ethanol as a solvent of tetrabutyl titanate or titanium tetrachloride, adding fatty acids with the carbon number of 6-20 and distilled water, uniformly stirring and mixing, transferring into a reaction kettle, heating, obtaining a mixed solution of white powder; filtering, washing, and obtaining a target product, wherein the mixing temperature of the ethanol and the tetrabutyl titanate or titanium tetrachloride is 13-25 DEG C, the stirring time is 2-7 minutes, a volume ratio of the tetrabutyl titanate or titanium tetrachloride to the ethanol is (7-15):30, and an amount of the distilled water is 14-27 percent of the volume of the added tetrabutyl titanate or titanium tetrachloride. The method is simple in process, safe in operation and fewer in environmental pollutants, the product is extremely small in grain size and stable in quality, the dispersity in oil is high, and the method is suitable for large-scale production.

Description

technical field [0001] The invention relates to a method for preparing small-diameter anatase nano-TiO 2 The simple method belongs to the fine chemical industry field. Background technique [0002] The development of nanotechnology has had a profound impact on human society, and with the deepening of the development of nanotechnology, the synthesis of nanomaterials (such as: particle size, shape, etc.) Willingness to design and create new systems. [0003] Titanium dioxide is non-toxic, stable in chemical properties, hardly reacts with other substances at room temperature, and is a slightly acidic amphoteric oxide. Anatase Nano TiO 2 It has good photocatalytic performance and the forbidden band width is 3.0 eV. Under the irradiation of 380 nm ultraviolet light, electrons in the valence band can be excited to jump to the conduction band to generate holes. After that, the holes, electrons and H adsorbed on the surface of titanium dioxide 2 O acts to generate OH, O 2 OOH...

AI Technical Summary

Problems solved by technology

The gas phase method refers to the direct use of gas or the use of laser, electron beam irradiation, etc. to change the raw materials into gas or ions, so that chemical or physical changes occur in the gas state, and then cool, condense, grow and other processes to prepare fine particles. method, but the production cost of gas phase method is higher

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