Thermal-Conductive MOFs@BN Self-Supporting Foams for Synchronously Boosting CO2 Adsorption/Desorption
Synchronous boosting adsorption and desorption efficiency is a great challenge for CO 2 adsorption capture, especially for metal–organic frameworks (MOFs) having high adsorption uptakes. Herein, a novel “self-supporting foam” strategy is proposed to fabricate a thermally conductive MOFs@boron nitride nanosheets (BNNS) composite foam (MOFs@BNNS-PEI) via polyethyleneimine (PEI) cross-linkage. The “rebar” BNNS and the “aggregate” MOFs are packed against each other to form a self-supporting structure, effectively reducing the reliance on polymers to maintain high MOFs loading. Furthermore, this approach enables the successful fabrication of three different types of typical MOFs, including HKUST-1, MIL-100(Fe), and ZIF-8. This unique design maintains a high specific surface area (SSA) of the MOFs foam and generates nitrogen-rich microporosity contributing to CO 2 adsorption. Additionally, PEI serves as a thermal bridge to reduce the interfacial thermal resistance between BNNS and MOFs, accelerating the thermal desorption of CO 2 within the MOFs foam. Benefiting from these advantages, the MOFs@BNNS-PEI exhibits a higher CO 2 adsorption capacity (1.35–1.42 times that of pure MOFs) and a significant increase in the desorption rate for CO 2 (5.0–5.7 times that of pure MOFs). Thus, the thermally conductive MOFs foam can be a viable option for efficient CO 2 capture in practical applications.
危险品化学品经营许可证（带存储）