Abstract
Titanium dioxide (TiO2) nanoparticles are used in a wide variety of products, such as renewable energy resources, cosmetics, foods, packaging materials, and inks. However, large quantities of surfactants are used to prepare waterborne TiO2 nanoparticles with long-term dispersion stability, and very few studies have investigated the development of pure water dispersion technology without the use of surfactants and synthetic auxiliaries. This study investigated the use of focused ultrasound to prepare surfactant-free waterborne TiO2 nanoparticles to determine the optimal conditions for dispersion of TiO2 nanoparticles in water. Under 395–400 kHz and 100–105 W conditions, 1 wt% TiO2 colloids were prepared. Even in the absence of a surfactant, in the water dispersion state, the nanoparticles were dispersed with a particle size distribution of ≤100 nm and did not re-agglomerate for up to 30 days, demonstrating their excellent dispersion stability.
Highlights
Technique of TiO2 NPs UsingAlong with SiO2 and ZnO nanoparticles, TiO2 nanoparticles are one of the most abundantly produced nanomaterials
The temperature and atmospheric pressure generated during bubble to as the collapse and their vary depending on bubble collapse arecollapse referredare to referred as the collapse power, andpower, their values varyvalues depending on the given frequency, ultrasonic irradiation time, temperature, medium type, and voltage
This study used a focused ultrasound technique to investigate a method for manufacturing surfactant-free waterborne TiO2 nanoparticles
Summary
Along with SiO2 and ZnO nanoparticles, TiO2 nanoparticles are one of the most abundantly produced nanomaterials. Approximately 3 million tons of TiO2 are produced industrially across the world for use in photocatalysts, self-cleaning agents, UV-protection agents, self-cleaning ceramics, antibacterial air purifiers, water treatment catalysts, cosmetics, inks, and packing materials [1,2] Because of their wide range of applicability, controlling particle dispersion and agglomeration in the colloids is crucial for determining the properties and characteristics of the TiO2 nanoparticles for controlling product performance. Based on the current production process, the particles in sunscreen must be uniformly dispersed at a size
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