In this study, activated carbons were prepared from bamboo via carbonization and successive KOH activation by tuning the post-treatment procedure. The resultant carbons possessed high surface area, high oxygen doping, and 3D hierarchical porous structure with interconnected micro-, meso- and macropores. These features resulted in ultra-excellent adsorption capacity for rhodamine B (> 1200 mg/g). Furthermore, the kinetic and isotherm experimental data were best described by pseudo-second kinetic model and Langmuir isotherm model, respectively. The adsorption of RhB onto the as-synthesized carbons was a spontaneous endothermic process. The π–π stacking, hydrogen bond, and acid-base interaction were proposed to account for the adsorption mechanism. Moreover, SiO₂ in bamboo-based carbon functioned as frameworks and its removal via alkali treatment led to the collapse of porous structure, decreasing surface area, pore volume, and O heteroatom doping, consequently dropping the adsorption performance. Overall, bamboo as an abundant and renewable biomass could be considered as a potential precursor for the production of excellent adsorbent for wastewater purification.

在这项研究中，活性炭是由竹子通过碳化和通过调整后处理程序依次进行KOH活化而制备的。所得碳具有高表面积，高氧掺杂和具有相互连接的微孔，中孔和大孔的3D分层多孔结构。这些特征导致了对罗丹明B（> 1200 mg / g）的超强吸附能力。此外，动力学和等温线实验数据最好分别用伪秒动力学模型和Langmuir等温线模型描述。RhB在合成碳上的吸附是自发的吸热过程。提出了π-π堆积，氢键和酸碱相互作用来解释吸附机理。此外，SiO ₂竹基碳中的碳原子作为骨架，通过碱处理将其去除会导致多孔结构的崩溃，表面积，孔体积的减少以及O杂原子的掺杂，从而降低吸附性能。总体而言，竹子是一种丰富的可再生生物质，可以被视为生产用于废水净化的优异吸附剂的潜在前体。