A low-temperature process to synthesize rutile phase TiO2 and mixed phase TiO2 composites

This works employed K2Ti4O9, a novel Ti source, to prepare TiO2 powders. By a “low-temperature dissolution–reprecipitation process” (LTDRP), rutile phase TiO2 was successfully synthesized after reacting at 50 °C for 48 h. The obtained sample showed a specific surface area about 45 m2/g, and excellent activity in photo-destruction of NOx gas. The coupling of rutile phase TiO2 with commercial anatase TiO2 showed significant effect in further enhancing the photocatalytic activity.