Figure 13.

The schematic illustration of different face masks integrated with triboelectric nanogenerator (TENG). a,b) show the filtration performance before and after applying rotating triboelectric nanogenerator in air filter by Gu et al., respectively. a,b) Adapted with permission.^{[ 289 ]} Copyright 2017, American Chemical Society. c) The structure of respiratory triboelectric nanogenerator for the self‐powered electrostatic absorption face mask by Liu et al. Adapted with permission.^{[ 290 ]} Copyright 2018, American Chemical Society. d) The proposed design of triboelectric self‐powered mask and e) The diagram of face mask with the TENG by Ghatak et al. d‐e) Reproduced with permission.^{[ 292 ]} Copyright 2021, Elsevier. f) Schematic illustration of the fabrication process of a new nano/micro fibrous hybrid mask. Reproduced with permission.^{[ 287 ]} Copyright 2021, Elsevier.