Preparation of nano TiO2 aqueous slurry

Abstract

The invention relates to nanometer titanium dioxide, in particular to a preparation method for nanometer TiO2 aqueous slurry. The method is characterized in that the method comprises the following steps: a, preparing high molecular organic solution with the concentration of between 1 and 20mg / ml to obtain a solution A; adding nanometer titanium dioxide into PEG2,000 aqueous solution with the concentration of between 1 and 10 mg / ml, and mixing the mixed solution evenly to obtain a solution B; and additionally preparing an emulsifier aqueous solution with the concentration of between 1 and 10 mg / ml and calling the solution as a solution C; and b. dropping the solution B into the solution A under the ultrasonic condition, and then adding the formed colostrum solution into the solution C dropby drop under the ultrasonic condition; carrying out the magnetic stirring of the W / O / W solution for 1 to 6 hours, then carrying out the high speed centrifugal separation of the obtained emulsion at 8,000-12,000 turns / minute, washing the emulsion through double distilled water for 1 to 3 times, and regulating the pH value to 7 to 8. The preparation method is characterized in that W / O / W emulsion technology is adopted to form a compact high molecular layer on the surface of TiO2 grains; and the modified TiO2 aqueous slurry can exist stably for a few months under the condition of the room temperature.

Description

A kind of preparation method of nanometer TiO2 aqueous slurry technical field The invention relates to nano titanium dioxide, in particular to a preparation method of nano TiO2 aqueous slurry. Background technique TiO2 is an n-type semiconductor with a band gap of 3.2eV, which is chemically stable and completely harmless to the human body. In addition to the general colloid effect, nano-titanium dioxide also has photoelectric conversion, ultraviolet absorption, catalysis and antibacterial effects, and can be used in many fields, such as: using the photocatalysis of nano-titanium dioxide for sewage treatment; making use of its anti-ultraviolet properties Skin care cosmetics; dye-sensitized solar cells developed by utilizing the photoelectric conversion properties of nano-titanium dioxide have become the most promising third-generation solar cells. Although the peculiar function of nano-titanium dioxide has created good conditions for its wide application. However, many p...

AI Technical Summary

Problems solved by technology

Since this method is only simple mechanical stirring and mixing, the prepared water-based slurry will still appear aggregation and precipitation after being placed for a certain period of time (about a week), which cannot well meet the needs of practical applications.