Sharafinia Soheila, Ardestani Nedasadat Saadati, Rashidi Alimorad, Abbasy Fereshteh, Eskandari Sabzi Pedram
Department of Chemistry, Faculty of Science, Shahid Chamran University of Ahvaz 613578-3151 Ahvaz Iran
Nanotechnology Research Center, Research Institute of Petroleum Industry (RIPI) 14665-1998 Tehran Iran
RSC Adv. 2025 Aug 19;15(36):29284-29299. doi: 10.1039/d5ra03873a. eCollection 2025 Aug 18.
In this study, organic compounds such as coordinate organic polymers (COPs) and metal-organic frameworks (MOFs) have been investigated as a known technology for CO and nitrogen (N) adsorption at low and high pressures. The combination of MOFs and COPs is an important innovation in porous materials for gas adsorption and separation. By exploiting the complementary properties of both, this approach improves adsorption performance, stability, and selectivity. This approach reduces the limitations of each material and opens up new opportunities for developing efficient and sustainable adsorbents. These compounds are efficient and cost-effective. First, the COP and COP@ZIF-8 core-shell were synthesized by solvothermal method and then characterized using famous techniques FT-IR, XRD, BET, TEM, HR-TRM, SEM, EDX/Mapping, TGA, and XPS to determine their physicochemical properties. Nanosorbents were tested for adsorption and separation of CO/N. The results showed that the modification of COP with ZIF-8 increased its CO adsorption capacity from 0.209 to 3.425 mmol g at 1 bar and 300.15 K. In addition, the adsorption selectivity of COP@ZIF-8 (20%) and COP@ZIF-8 (30%) core-shells is significantly (207.752 and 200.592 in ambient conditions, respectively) improved compared to pure COP (14.824).
在本研究中，配位有机聚合物（COPs）和金属有机框架（MOFs）等有机化合物已作为一种已知技术用于研究在低压和高压下对一氧化碳（CO）和氮气（N）的吸附。MOFs和COPs的结合是用于气体吸附和分离的多孔材料的一项重要创新。通过利用两者的互补特性，这种方法提高了吸附性能、稳定性和选择性。这种方法减少了每种材料的局限性，并为开发高效且可持续的吸附剂开辟了新机会。这些化合物高效且具有成本效益。首先，通过溶剂热法合成了COP和COP@ZIF-8核壳结构，然后使用傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）、比表面积分析（BET）、透射电子显微镜（TEM）、高分辨热重分析（HR-TRM）、扫描电子显微镜（SEM）、能谱分析/元素映射（EDX/Mapping）、热重分析（TGA）和X射线光电子能谱（XPS）等著名技术对其进行表征，以确定它们的物理化学性质。对纳米吸附剂进行了CO/N吸附和分离测试。结果表明，在1巴和300.15 K条件下，用ZIF-8对COP进行改性后，其CO吸附容量从0.209 mmol/g提高到了3.425 mmol/g。此外，与纯COP（14.824）相比，COP@ZIF-8（20%）和COP@ZIF-8（30%）核壳结构的吸附选择性在环境条件下分别显著提高（分别为207.752和200.592）。
