Adsorption process is a cost‐effective way to the dye removal and CO₂ capture. Improvements of the adsorption performance and conformance to the practical application conditions are necessary steps to approach practicality. Herein, hierarchical porous carbon‐doped boron nitride (BCN) aerogels with amino modification were synthesized for the first time by freeze drying and carbothermal reduction method. As‐prepared BCN aerogels exhibited superior adsorption performance for CO₂ and dyes. Compared with BN aerogel, notwithstanding the lower surface area, the as‐prepared BCN aerogel exhibited 6‐fold‐enhanced CO₂ capture and higher dyes adsorption capacity, delivering a more than 150 times adsorption rate with methylene blue (MB) as the adsorbent. The reinforced adsorption properties were demonstrated to be primarily from the synergistic effect of carbon doping and amino decoration on the obviously improved adsorption energy, hydrophilicity and mesopore volume, accelerating the kinetics of dye and gas molecules diffusion. This work provides a new way on the design of high‐efficiency absorbent materials.

中文翻译：

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氨基修饰的分级多孔BCN气凝胶的CO2和染料的制备及其增强的吸附性能

吸附过程是去除染料和捕获CO _2的一种经济有效的方法。改善吸附性能和符合实际应用条件是实现实用性的必要步骤。本文通过冷冻干燥和碳热还原法首次合成了氨基修饰的分层多孔碳掺杂氮化硼（BCN）气凝胶。制备的BCN气凝胶对CO ₂和染料表现出优异的吸附性能。与BN气凝胶相比，尽管表面积较小，但制备的BCN气凝胶仍具有6倍的CO ₂增强具有较高的捕获率和较高的染料吸附能力，以亚甲基蓝（MB）作为吸附剂的吸附速率达到150倍以上。研究表明，增强的吸附性能主要来自碳掺杂和氨基修饰对明显提高的吸附能，亲水性和中孔体积的协同作用，从而加速了染料和气体分子的扩散动力学。这项工作为高效吸收材料的设计提供了一条新途径。