Efficient photocatalytic degradation of gaseous formaldehyde by the TiO2/tourmaline composites

- The TiO2/tourmaline composites were prepared by a sol-gel method.
- The composites exhibited excellent photocatalytic activity and good stability.
- The physicochemical property of tourmaline may be favor for the degradation of HCHO.
- The mixed-phase of anatase and rutile TiO2 may be favor for the degradation of HCHO.