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Functionally modified TiO₂ nanoparticles with UV/pH dual-responses for controllable emulsion separation.

Yu-Ping Zhang^1,2, Chang-Hua Zhao², Sheng-Qiang Qiu¹

¹College of Chemistry and Materials Engineering, Hunan University of Arts and Science, Changde, 415000, P.R. China. beijing2008zyp@163.com.

Chemical Communications (Cambridge, England)

|May 26, 2026

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Researchers created dual-responsive titanium dioxide (TiO2) nanocomposites that change surface wettability. These smart materials can controllably separate oil-in-water and water-in-oil emulsions, offering new possibilities in materials science.

Area of Science:

Materials Science
Nanotechnology
Surface Chemistry

Background:

Developing responsive materials is crucial for advanced applications.
Controlling surface wettability is key for separation technologies.
Titanium dioxide (TiO2) is a versatile material for nanocomposite fabrication.

Purpose of the Study:

To develop a facile method for fabricating UV/pH dual-responsive TiO2 nanocomposites.
To investigate the switchable surface wettability of the as-prepared materials.
To demonstrate the controllable separation of emulsions using these nanocomposites.

Main Methods:

Fabrication via UV deposition and solution immersion.
Characterization of TiO2 nanocomposite properties.

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Testing of surface wettability under UV and pH stimuli.

Evaluation of emulsion separation efficiency for oil-in-water and water-in-oil systems.

Main Results:

Successfully synthesized UV/pH dual-responsive TiO2 nanocomposites.
Achieved reversible switchable surface wettability.
Demonstrated controllable separation of both oil-in-water and water-in-oil surfactant-stabilized emulsions.

Conclusions:

The developed method provides a facile route to dual-responsive TiO2 nanocomposites.
The materials exhibit tunable wettability for responsive applications.
These nanocomposites show promise for efficient and controllable emulsion separation.