In this study, using an atmospheric pressure air plasma jet generated by a dielectric barrier structure with hollow electrodes (HEDBS), we developed an ultrafast process for spraying TiO2 self-cleaning films inside tubular substrates. Importantly, SEM images showed that the TiO2 particles were dispersed evenly in the tubular substrates. Furthermore, Raman and XRD pattern indicated the anatase structure of the HEDBSspayed TiO2 coating after heating at 270 degrees C. Further results of the self cleaning test suggested that the proposed cost-and time-saving HEDBS approach with air working gas could provide a feasible way for synthesizing thin TiO2 nanofilms. (C) 2017 Published by Elsevier B.V.