The nanoporous carbon (NPC) performance, used for drug delivery carriers, wastewater treatment, or hydrogen storage, is strongly determined by the pore morphology during the desorption. In this work, the structural characteristics of NPC fabricated from rice husk by KOH activation were studied. X-ray diffractometry (XRD) and small-angle X-ray scatter were then implemented to characterize the pore size and adsorbate model under a series of adsorption–desorption conditions, combined with the details of the multilayer pore morphology obtained from gas adsorption. To this aim, the water was selected as adsorbate, which could be investigated under desorption conditions. The results confirmed that NPC changed from an amorphous structure to a regularly arrayed monolayer structure by introducing adsorbates and returns to their origin after thoroughly drying. A detailed understanding of the behavior of adsorbent and adsorbate may facilitate its storage ability and application in selective sorption, separation, and storage processes.

用于药物输送载体、废水处理或储氢的纳米多孔碳 (NPC) 性能在很大程度上取决于解吸过程中的孔形态。在这项工作中，研究了通过 KOH 活化由稻壳制成的 NPC 的结构特征。然后实施 X 射线衍射 (XRD) 和小角度 X 射线散射来表征一系列吸附 - 解吸条件下的孔径和吸附质模型，并结合从气体吸附获得的多层孔隙形态的细节。为此，选择水作为吸附质，可以在解吸条件下对其进行研究。结果证实，NPC通过引入吸附物从无定形结构变为规则排列的单层结构，并在彻底干燥后返回其原始状态。详细了解吸附剂和被吸附物的行为可能有助于其储存能力和在选择性吸附、分离和储存过程中的应用。