Figure 9.

a) SEM image titanate nanowires as the precursors for TiO₂ NWs. b) The scale up production of titanate nanowires. c) A fabricated filter paper from TiO₂ NWs after spreading of titanate nanowires and calcination thermal treatment. d) Comparison of the bacterial inhibition performance of TiO₂NWs filter with the control Teflon filter. e) Construction of a mask prototype by connecting the TiO₂NWs filter paper to a 3D‐printed plastic frame. f) Decontamination of the mask by UV irradiation. Reproduced with permission.^{[ 82 ]} Copyright 2020, Wiley.