Fine tuning the electronic properties of amorphous mesoporous alumina has been extensively studied due to its wide range of applications. Luckily, fundamental changes via secondary metal atom insertion has been broadly recognized and pave the way towards development of novel materials. In this study, structure-property correlation of mesoporous alumina framework has been evaluated for elevated temperature application via MgO insertion. The pristine Al₂O₃ possess an excellent specific surface area corresponding to 319 m²/g with average pore diameter of 14.8 nm. However, surface area and pore diameter were linearly decreased as a function of hydrothermal temperature. Remarkably, MgO insertion improved its specific surface area to 357 m²/g with narrow pore size distribution at 7.1 nm. The improved surface area is due to the coexistence of MgO with Al₂O₃ in its amorphous framework. Meanwhile, the improved CO₂ sorption capacity attributed to the induced strong basic sites via MgO insertion and better kinetics is due to the appropriate pore structure of the derived nano-composite. Further, the heterogeneity of the alumina framework with 6-coordinated and 4-coordinated environment established improved basicity as suggested by solid state ²⁷Al-NMR and CO₂-TPD results. The developed composite shows excellent thermal stability for temperature swing CO₂ desorption with 95% retainment in its sorption capacity.

由于其广泛的应用，对非晶态介孔氧化铝的电子性能进行了微调。幸运的是，通过二次金属原子插入而发生的根本变化已得到广泛认可，并为开发新型材料铺平了道路。在这项研究中，介孔氧化铝骨架的结构-性能相关性已通过MgO插入进行了高温评估。原始的Al ₂ O ₃具有优异的比表面积，对应于319 m ² / g，平均孔径为14.8 nm。但是，表面积和孔径随水热温度的增加呈线性下降。值得注意的是，MgO的插入将其比表面积提高到357 m ²/ g，在7.1 nm的孔径分布较窄。改善的表面积归因于MgO和Al ₂ O ₃在其非晶态框架中共存。同时，归因于通过MgO插入诱导的强碱性位点和更好的动力学而导致的改善的CO ₂吸附能力归因于衍生的纳米复合材料的合适的孔结构。此外，如固态²⁷ Al-NMR和CO ₂ -TPD结果所暗示的，具有6配位和4配位环境的氧化铝骨架的异质性建立了改善的碱度。所开发的复合材料对变温CO ₂脱附显示出优异的热稳定性，并具有95％的吸附能力。