Composite TiO2/clays materials for photocatalytic NOx oxidation

- Clays-supported TiO2 photocatalysts are prepared by simple, scalable method.
- Visible light active TiO2 is incorporated in hydrotalcite, talk and kunipia clays.
- The alkali substrates facilitate the NOx adsorption to the photocatalytic surface.
- Low-content TiO2 photocatalysts demonstrated high NOx oxidation activity.
- Titania/hydrotalcite photocatalyst exhibited remarkable NOx removal activity.