Hierarchical nanoporous carbons (HNC) have been proven to be an effective adsorbent for the adsorption of volatile organic compounds (VOCs) and CO_2. However, questions remain regarding the hierarchical structure regulation, the adsorption mechanisms of adsorbate uptake, and interactions within the HNC. We synthesize HNC from wood, using a microwave-induced heating method incorporating K₂CO₃ activation. Our HNC exhibit Murray's law multiscale structures, prompting a molecular-scale study of adsorbate adsorption via nuclear magnetic resonance (NMR). NMR chemical shifts are consistent with ring-current effects from the adsorbent. Our NMR technique provides a convenient way to quantitate adsorption of adsorbate in HNC. VOC vapor adsorption results show NMR chemical-shift changes with time, suggesting initial adsorption into mesopores, followed by diffusion into micropores. Schroeder's paradox is demonstrated by differences in observed shifts for adsorbed liquid vis-à-vis vapor phase in these HNC. These HNC show high CO₂ adsorption capacity, portending applications to carbon capture.

层级纳米多孔碳（HNC）已被证明是用于吸附挥发性有机化合物（VOC）和CO ₂的有效吸附剂_。但是，关于层次结构的调节，被吸附物吸收的吸附机制以及HNC内部的相互作用，仍然存在疑问。我们使用结合K ₂ CO ₃的微波加热法从木材合成HNC激活。我们的HNC展示了穆雷定律的多尺度结构，从而促进了通过核磁共振（NMR）进行吸附物吸附的分子尺度研究。NMR化学位移与吸附剂的环流效应一致。我们的NMR技术为定量HNC中吸附物的吸附提供了一种方便的方法。VOC蒸气吸附结果显示NMR化学位移随时间变化，表明最初吸附到中孔中，然后扩散到微孔中。在这些HNC中，吸附液相对于汽相的观察到的位移差异证明了施罗德悖论。这些HNC表现出高的CO ₂吸附能力，预示着碳捕集的应用。