Three-Dimensional Functionalized Boron Nitride Nanosheets/ZnO Superstructures for CO₂ Capture

Abstract

Without any extra directing agents or surfactants, three-dimensional (3D) hierarchically cubic and spherical morphologies of functionalized boron nitride nanosheets (FBNNSs)/ZnO superstructures have been controlled successfully via the evaporation-induced solvothermal synthesis. As-resulted spherical FBNNSs/ZnO superstructures not only exhibit a high capture capacity of CO 2 around 63.4 cm 3 /g (124.5 mg/g) from 0 to 1 bar at 273 K but also show a good reusability of 10 cycles with an average removal ability up to 58.9 cm 3 /g (115.7 mg/g). The excellent adsorption property can be further explained by the chemisorption, van der Waals interaction, and H bonds from the surface of ZnO and the in-plane and edged amino groups of FBNNS. Therefore, the preparation of 3D FBNNSs/ZnO superstructures provides a new and promising material for CO 2 adsorption with tunable morphologies.

2D Boron Nitride Heterostructures: Recent Advances and Future Challenges

“…Achieving a good absorption of CO 2 gas at the low pressure of 1 bar is still challenging. 3D h‐BN/ZnO heterostructures functionalized by ‐NH 2 groups have shown an efficient CO 2 capture efficiency at 1 bar and 273 K. [ 53 ] The composite has been prepared via a two‐step process ( Figure ) ; in the first one, NH 2 ‐functionalized h‐BN sheets have been obtained by ball‐milling bulk BNs with urea; in the second step (Step 2, II, in Figure 4), 3D spherical‐porous h‐BN/ZnO superstructures finally form via evaporation‐induced solvothermal synthesis and annealing. The spherical h‐BN/ZnO material has shown a high capacity of CO 2 capturing and good reusability.…”

High‐thermal conductivities of epoxy composites via p‐phenylenediamine interfacial modification and process intensification

“…Before the test, EG, PPD, and EG‐PPD were dried overnight to exclude the interference of water. The absorption peaks at 1631 and 3374 cm −1 respectively assigned to the in‐plane bending (1650–1560 cm −1 ) and stretching vibrations (3500–3300 cm −1 ) of ‐NH 2 groups in PPD spectrum 29–31 . These two absorption peaks also appeared in EG‐PPD spectrum, while pure EG does not have these two peaks.…”

“…The absorption peaks at 1631 and 3374 cm À1 respectively assigned to the in-plane bending (1650-1560 cm À1 ) and stretching vibrations (3500-3300 cm À1 ) of -NH 2 groups in PPD spectrum. [29][30][31] These two absorption peaks also appeared in EG-PPD spectrum, while pure EG does not have these two peaks. On the basis of above analyses, it is evident to see that PPD is existed in EG-PPD, indicating the modification of PPD is successful.…”

Effect of Triblock Copolymer on Carbon-Based Boron Nitride Whiskers for Efficient CO2 Adsorption

“…(2) the dual functionality –NH 2 (attached to carbon) and –OH (attached to boron) also able the CO 2 adsorption ability to be enhanced. The physiosorption of CO2 in-plane sites (functional groups) of adsorbents extensively based on vander waal interaction, that existed on the top sites of boron or nitrogen atoms as well as onto the bridges sites of B–N linkage [62,63].…”