Method for preparing blue-shifting TiO2 microspheres

Abstract

The invention relates to a method for preparing blue-shifting TiO2 microspheres. The method comprises the following steps: adding titanium sulfate in deionized water to obtain a solution A; adding urea in deionized water to obtain a solution B; slowly dripping the solution B in the solution A to obtain a solution C; mixing a dimethylformamide solution D and the solution C to obtain a solution E; transferring the solution E to a hydrothermal reaction kettle lined with Teflon, sealing the hydrothermal reaction kettle and then putting the sealed hydrothermal reaction kettle in a temperature-pressure-controlled microwave hydrothermal reaction instrument for preparation reaction in a temperature control mode, and carrying out natural cooling after the completion of reaction; and allowing the obtained white turbid liquid to stand, alternately washing the white turbid liquid with ethanol and deionized water, then carrying out centrifugal collection by taking absolute alcohol as the solvent, and drying to obtain the products, namely TiO2 microspheres. The microwave radiation heating method is adopted, the regular spherical blue-shifting TiO2 microspheres are further prepared in the high-temperature and high-pressure hydrothermal environment, and the blue-shifting TiO2 microspheres are 1-2 mum in diameter, 3.35 ev in forbidden bandwidth and better in dispersivity.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows creation of tiny particles that change their color depending on how they were made up at different temperatures or pressures. These small particles show greenish colors when exposed to sunlight while being less expensive than traditional methods like pigment synthesis. They also exhibit improved stability during storage compared to other materials used in these techniques.

Problems solved by technology

The technical problem addressed by this patented technology relates to developing an efficient way to prepare small particles that exhibit minimal slip during use without requiring excessive energy input from outside sources such as thermal evacuum techniques like those described earlier. This would allow for better control over particle size distribution, improve their effectiveness at various applications, reduce costs associated therewith, simplify manufacturing processes, increase efficiency, and enhance reproducibility.

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