Study of MWCNT Dispersion Effect in TiO2-MWCNT Composites for Gas-Phase Propene Photooxidation

•A facile preparation method of MWCNT and TiO2 composites is presented.•The presence of MWCNT improved the photocatalytic activity of the TiO2.•The use of an ultra sound probe in the MWCNT dispersion increases the ASA of MWCNT.•A better interaction of TiO2 and MWCNT improves the photooxidation of propene.