A novel hydrochar-based core–shell material with improved affinity towards CO₂ was synthesized through encapsulation within ZnO shell, followed by chemical grafting to an organic moiety bearing terminal diethanolamino groups and further dispersion of Cu⁰ nanoparticles. Characterization through nitrogen adsorption–desorption isotherms with BET and BJH models, SEM, TEM, zeta potential measurements, FTIR spectroscopy, DSC and XPS analyses revealed a strong influence of the modification procedure on the performance of each material in CO₂ adsorption. The resulting metal-inorganic-organic-core–shell (MIOCS) displayed compacted structure with a wide pore size distribution that imposes intraparticle diffusion as a kinetic-controlling step. Cu-MIOCS showed an appreciable CO₂ retention capacity of 5.42 mmol/g compared to many adsorbents reported so far. This affinity towards CO₂ was explained in terms of physical and non-stoichiometric CO₂ condensation. This finding is of great importance, because it demonstrates that judicious modifications of vegetal-deriving wastes such as woods and other biomasses give rise to added-value materials as low cost and efficient gas adsorbents with high affinity towards CO₂.

通过封装在ZnO壳中，然后化学接枝到带有末端二乙醇氨基的有机部分上，并进一步分散Cu ⁰纳米颗粒，合成了一种新型的基于水碳的核壳材料，具有对CO _2的亲和力。通过使用BET和BJH模型进行的氮吸附-解吸等温线表征，SEM，TEM，ζ电位测量，FTIR光谱，DSC和XPS分析，揭示了改性程序对每种材料在CO _2中的性能产生了强烈影响。吸附。由此产生的金属-无机-有机-核-壳（MIOCS）表现出致密的结构，具有宽的孔径分布，这迫使颗粒内扩散成为动力学控制步骤。与迄今为止报道的许多吸附剂相比，Cu-MIOCS表现出明显的CO ₂保留容量为5.42 mmol / g。通过物理和非化学计量的CO ₂缩合解释了对CO _2的这种亲和力。该发现非常重要，因为它表明，对诸如木材和其他生物质之类的植物性废物进行明智的改造，可以形成具有高附加值的材料，成为低成本，高效的对CO ₂具有高亲和力的气体吸附剂。