1. Molecular structure of hexagonal boron nitride

2. SEM images of (a, b) activated carbon and (c, d) BN aerogels^[24]

3. (a) Schematic illustration of the metastructure design of BN aerogels; (b) The lightest hBN aerogels sample compared with other ultralight materials; (c) The ultimate stress, Young’s modulus, and relative height for 100 compression cycles; (d) Optical and SEM images of BN aerogels under different pressures^[26]

4. Schematic illustration of organic-inorganic hybrid block copolymer polynorbornene-decorane for preparing BN aerogels^[36]

5. (a) Schematic representation of aerogel production by a critical point drying method; (b) Picture of the as-obtained BN aerogels, MoS₂ aerogels and GA^[40]

6. (a) Schematic illustration of the freeze-drying method for preparing nano-ribbon BN aerogels; (b, c) The flexibility of BN nano-ribbon aerogels in liquid nitrogen and flame^[41]

7. Schematic illustration of the preparation procedure of crosslinking-free rGO/BN composite aerogels^[43]

8. (a,b) TEM images of BN aerogels and (c) schematic illustration of microstructure^[21]

9. (a) The absorption of CO₂ and N₂ at 273 and 298 K by BN aerogel and (b) corresponding histograms^[28]; (c) SEM image of Pt nanocrystals/BN aerogel; (d) Response/recovery curve of Pt nanocrystal/BN aerogel towards propane^[52]

10. (a) SEM images of Pt/BN-GA catalyst^[55]; (b) ECSA comparison chart of Pt/BN-GA, Pt/GA, Pt/G and Pt/C and (c) corresponding current-time curves^[57]

11. (a-d) The Wetting behaviour and oil absorption capacity of rGO/BN sponge; (e) The ability of rGO/BN sponge to absorb different organic liquids; (f) The rGO/BN sponge repetitively absorbed hexane and released its vapour under heat treatment (85 ℃); (g) Recyclability of the rGO/BN sponge for absorption of hexane under absorption-squeezing cycles^[59]

12. Schematic illustrating the fabrication of graphene/BN hybrid aerogels^[64]

13. SEM images of the double-pane wall structure of BN aerogels^[26] (a) hBNAG; (b) Double-pane wall structure of hBNAGs. Scale bars, 20 nm