图1 六方氮化硼分子结构示意图

Fig. 1 Molecular structure of hexagonal boron nitride

图2 (a, b)活性炭和(c, d)BN气凝胶的SEM照片[24]

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

图3 (a)双壁双曲线型BN气凝胶的制备流程示意图, (b)BN气凝胶与其他材料的密度对比, (c)BN气凝胶的相对高度、最大压力和杨氏模量与循环次数的关系曲线, (d)BN气凝胶在不同压力下的光学照片和SEM照片[26]

Fig. 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]

图4 有机-无机杂化的嵌段共聚物聚降冰片烯-癸硼烷制备多孔BN流程示意图[36]

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

图5 (a)超临界干燥法制备BN气凝胶流程示意图, (b)BN气凝胶、MoS2气凝胶和GA照片[40]

Fig. 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]

图6 (a)冷冻干燥法制备纳米带状BN气凝胶流程示意图, (b,c)BN纳米带气凝胶在液氮和火焰中的柔韧性[41]

Fig. 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]

图7 无交联剂法制备rGO/BN复合气凝胶的流程示意图[43]

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

图8 BN气凝胶的(a,b)TEM照片及(c)微观结构示意图[21]

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

图9 (a)在273和298 K下, BN气凝胶对CO2和N2的吸收量及(b)相应的柱状图[28], (c)Pt纳米晶/BN气凝胶的SEM照片, (d)Pt纳米晶/BN气凝胶对丙烷的响应/恢复曲线[52]

Fig. 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]

图10 (a)Pt/BN-GA催化剂的SEM照片[55], (b)Pt/BN-GA、Pt/GA、Pt/G和Pt/C的ECSA对比图和(c)电流-时间曲线[57]

Fig. 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]

图11 (a~d) rGO/BN气凝胶的润湿行为和吸油能力, (e) rGO/BN气凝胶吸收不同有机液体的能力, (f) rGO/BN气凝胶反复吸收己烷并在热处理(85℃)下释放其蒸汽的循环曲线, (g) rGO/BN气凝胶在反复吸收-挤压下吸收己烷的循环曲线[59]

Fig. 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]

图12 rGO/BN混合气凝胶的制备流程示意图[64]

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

图13 层状双壁结构BN气凝胶的SEM照片[26]

Fig. 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