Fig. 6.

a Schematic fabricating process and micro-structure of fire alarm wallpaper, GO structure with rich oxygen-containing groups, and glass fiber paper with multilayered structure.

Reproduced with permission from Ref. [80]. Copyright 2018 American Chemistry Society. b Schematic illustration of MPMS/LAA co-modified GO (MLGO) paper, MLGO paper. Reproduced with permission from Ref. [83]. Copyright 2020 Elsevier. c Photographs of the fire-warning coatings on the surface for different flammable materials: polystyrene resin (PR), cotton (CN), and wood block (WB). Reproduced with permission from Ref. [64]. Copyright 2018 Elsevier