Hydrothermal synthesis method of titanium dioxide nanoparticles

Abstract

The invention relates to a hydrothermal synthesis method of titanium dioxide nanoparticles. The method comprises the following steps: (1) drawing a microfluidic pipeline diagram of a two-dimensional plane; (2) printing a pipeline template on a transparent plastic film to prepare a reverse mould; (3) placing the reverse mould into an open culture dish or a glass dish, evenly mixing polydimethylsiloxane with a curing agent according to a ratio of 10 to 1, pouring the mixture onto the reverse mould, and put the reverse mould into a drying oven at the temperature of 70 DEG C, and heating for 1h; (4) removing the mould to obtain a cured microfluidic pipeline, and bonding the microfluidic pipeline to a glass substrate to obtain a microfluidic chip; (5) using the microfluidic chip to prepare emulsion by taking an aqueous solution of titanium trichloride as an aqueous phase and using dodecane as an oil phase; (6) heating the emulsion in a water bath at 70 DEG C for 2h, stirring, and preciselycontrolling the sizes of the titanium dioxide nanoparticles by adjusting the sizes of the emulsion droplets; (7) washing the titanium dioxide nanoparticles with water and an organic solvent, drying, and finally characterizing.

Description

technical field [0001] The invention relates to the technical field of nano TiO2 photocatalyst preparation, in particular to a hydrothermal synthesis method of titanium dioxide nano particles. Background technique [0002] Titanium dioxide has special physical and chemical properties and electronic band structure, and has high photocatalytic activity. As a photocatalytic material, it is widely used in the research and application fields of environmental protection and pollution control. The preparation method of TiO2 affects the morphology and structure of the titanium dioxide catalyst, thus greatly affecting its photocatalytic performance. Therefore, in order to obtain a photocatalyst with high activity, the preparation technology of TiO2 has also been extensively and deeply studied. [0003] Compared with other wet chemical methods, the hydrothermal method has many advantages, and it has attracted people's attention in recent years for the preparation of nano-powders and t...

AI Technical Summary

Problems solved by technology

However, the reaction time of conventional hydrothermal reaction to prepare TiO2 powder is long, and the heating is uneven, and the obtained TiO2 nanoparticles have a large particle size and a wide distribution.

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