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Related Experiment Video

Updated: Jan 25, 2026

Applying Dynamic Strain on Thin Oxide Films Immobilized on a Pseudoelastic Nickel-Titanium Alloy

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Published on: July 28, 2020

Titanium Oxide Microspheres with Tunable Size and Phase Composition.

Anton S Poluboyarinov¹, Vitaly I Chelpanov², Vasily A Lebedev³

¹Faculty of Materials Science, Lomonosov Moscow State University, Leninskiye Hills 1, Moscow 119234, Russia. anpolvk@gmail.com.

Materials (Basel, Switzerland)

|May 10, 2019

Summary

This summary is machine-generated.

Researchers developed a method to create uniform titanium oxide microspheres with tunable size and properties. These advanced titania particles show promising photoprotective capabilities, particularly in their amorphous form.

Keywords:

SPF alkoxide hydrolysis amorphous titania optical absorption edge size control sol-gel synthesis titania microspheres

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Published on: August 4, 2017

Area of Science:

Materials Science
Nanotechnology
Physical Chemistry

Background:

Monodisperse titanium oxide microspheres possess unique properties valuable for applications like solar cells and cosmetics.
Achieving controlled synthesis of these microspheres regarding size distribution, phase composition, and porosity remains a significant challenge.

Purpose of the Study:

To synthesize spherical titania particles with controllable size, crystallinity, and pore size.
To investigate the effect of sodium hydroxide (NaOH) concentration on particle morphology and size.
To explore the optical and photoprotective properties of the synthesized microspheres.

Main Methods:

Synthesis via hydrolysis of Ti(OⁿBu)₄ in ethanol.
Particle size and morphology analysis using Scanning Electron Microscopy (SEM) and Differential Centrifugal Sedimentation (DCS).
Optical property assessment via diffuse reflectance UV-Vis spectroscopy and characterization of crystallinity through thermal/hydrothermal treatments and Transmission Electron Microscopy (TEM) with Focused Ion Beam (FIB) lamellae.

Main Results:

Spherical titania particles with diameters ranging from 300 nm to 1.5 μm were successfully synthesized.
Particle size and morphology were effectively controlled by adjusting water and NaOH concentrations.
Amorphous titania microspheres exhibited the highest sun protection factor (SPF), indicating significant photoprotective properties.

Conclusions:

A novel method allows for the controlled synthesis of monodisperse titanium oxide microspheres.
The developed titania microspheres demonstrate tunable properties and possess valuable photoprotective characteristics.
These findings open avenues for advanced applications in cosmetics and potentially other fields requiring UV protection.