F-TiO2/SWCNT hybrid have better sonophotocatalytic and photocatalytic activity than F-TiO2/MWCNT and F-TiO2 for degradation of malachite green under visible light irradiation.
SWCNT enhances the photocatalytic activity of F-TiO2 more than MWCNT because there are more individual contact points may be created between the SWCNT and F-TiO2 nanoparticle surface which is the key for band gap narrowing.