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Oxygen-Deficient TiO₂ Aerogel for Enhanced Photocatalytic Performance.

Haochen Jiao¹, Wenxuan Wang¹, Cong Li¹

¹Key Laboratory of Bio-Based Material Science and Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, China.

Gels (Basel, Switzerland)

|May 27, 2026

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This study developed oxygen-vacancy-rich porous titanium dioxide (TiO2) gel, enhancing its efficiency for converting light to electricity. The new material shows excellent photocatalytic activity for degrading pollutants and producing hydrogen.

Area of Science:

Materials Science
Photocatalysis
Nanotechnology

Background:

Low charge-separation efficiency in titanium dioxide (TiO2) hinders its photoelectric conversion performance.
Developing advanced TiO2-based materials is crucial for efficient photocatalysis.

Purpose of the Study:

To fabricate oxygen-vacancy-rich porous TiO2 gel photocatalyst.
To investigate the impact of oxygen vacancies and hierarchical porous structure on photocatalytic activity.

Main Methods:

Fabrication of oxygen-vacancy-rich porous TiO2 gel.
Characterization using Electron Paramagnetic Resonance (EPR) and X-ray Photoelectron Spectroscopy (XPS).
Evaluation of photocatalytic activity for Rhodamine B (RhB) degradation and hydrogen evolution.

Keywords:

TiO2 oxygen vacancies photocatalytic degradation porous structure

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Last Updated: May 28, 2026

The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance

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Published on: August 31, 2018

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TiO₂-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method

Published on: April 26, 2017

Main Results:

The material exhibited a 3D interconnected hierarchical porous architecture with a surface area of 62.9 m2 g-1.
EPR and XPS confirmed Ti3+ defects and oxygen vacancies, enhancing charge carrier separation and migration.
Achieved over 85% RhB degradation in 50 min and a hydrogen production rate of 850.6 μmol·g-1 h-1.

Conclusions:

The synergistic effect of hierarchical porous structure and oxygen vacancies significantly enhances TiO2 photocatalytic performance.
This work offers an effective strategy for improving TiO2 photoelectric conversion and provides guidance for defect engineering.