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Highly active meso-microporous TaON photocatalyst driven by visible light.
Seigo Ito1, K Ravindranathan Thampi, Pascal Comte
1Laboratory of Photoniques and Interfaces, Institute des Sciences et Ingenierie Chemiques, Ecole Polytechnique Federale de Lausanne, CH-1015, Lausanne, Switzerland.
Chemical Communications (Cambridge, England)
|February 23, 2005
Summary
Tantalum oxynitride (TaON) shows significantly enhanced photocatalytic activity. This novel material is approximately 20 times more effective than titanium dioxide (TiO2) for visible light-driven methanol oxidation.
Area of Science:
- Materials Science
- Photocatalysis
- Chemical Engineering
Background:
- Titanium dioxide (TiO2) is a widely studied photocatalyst, primarily activated by UV-visible light.
- Developing efficient visible-light-activated photocatalysts is crucial for sustainable chemical processes.
Purpose of the Study:
- To evaluate the photocatalytic performance of Tantalum oxynitride (TaON) under visible light irradiation.
- To compare the activity of TaON with a standard photocatalyst, TiO2 (P25).
Main Methods:
- Photocatalytic oxidation of methanol.
- Characterization of TaON and TiO2 (P25) catalysts.
- Activity testing under visible light conditions.
Main Results:
- TaON demonstrated approximately 20 times higher photocatalytic activity compared to TiO2 (P25).
- TaON is an effective visible-light-activated photocatalyst for methanol oxidation.
Conclusions:
- TaON presents a promising alternative to TiO2 for visible-light photocatalysis.
- The enhanced activity of TaON opens new avenues for efficient solar fuel production and environmental remediation.