Hydrotalcite-like compounds (HT) show potential as CO₂ adsorbent materials for pre-combustion CO₂ capture applications, but require improvements in stability, adsorption capacity and kinetics. In this study, HT/SBA15 hybrids (with different Mg/Al ratios varying from 0.3 to 3) have been synthesised using a two-stage grafting method to coat a mesoporous SBA15 with hydrotalcite layers. The HT/SBA15 hybrids showed significant improvement in intrinsic CO₂ uptake (per mass of HT), initial uptake rate, and multicycle stability compared to unsupported HT. Compared to previously reported nanostructured carbon supports (e.g. CNF, MWCNTs), the HT/SBA15 hybrids were found to be more thermally stable and exhibit comparable adsorption uptake and rates. In particular, the use of SBA15 as a support is shown to prevent the gradual loss in weight from thermal decomposition observed for HT/MWCNT or HT/GO composites over extended cycling.

类水滑石（HT）具有潜在的CO ₂吸附材料，可用于燃烧前的CO ₂捕集应用，但需要提高稳定性，吸附能力和动力学。在这项研究中，已经使用两阶段接枝方法合成了HT / SBA15杂化物（Mg / Al比例从0.3到3不等），以在中孔SBA15上覆盖水滑石层。HT / SBA15杂种表现出内在CO _2的显着改善吸收（每质量HT），初始吸收率和与不受支持的HT相比的多周期稳定性。与先前报道的纳米结构碳载体（例如CNF，MWCNT）相比，HT / SBA15杂化物具有更高的热稳定性，并具有可比的吸附吸收率和速率。特别地，显示出使用SBA15作为载体可防止在延长的循环中因HT / MWCNT或HT / GO复合材料观察到的热分解而逐渐失去重量。