Zhang Zhe, Chen Yi, Wang Peng, Wang Zhen, Zuo Can, Chen Wenqing, Ao Tianqi
College of Architecture and Environment, Sichuan University, Chengdu 610065, China.
College of Architecture and Environment, Sichuan University, Chengdu 610065, China; State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China.
J Hazard Mater. 2022 Feb 5;423(Pt B):127103. doi: 10.1016/j.jhazmat.2021.127103. Epub 2021 Sep 2.
N-doped hierarchical porous carbons (NHPCs) were successfully prepared from soft-templated zeolitic imidazolate framework-8 (ZIF-8) precursors using sodium dodecylbenzene sulfonate (SDBS) as a template through facile one-step carbonization and applied in tetracycline hydrochloride (TCH) adsorption. The NHPC synthesized at 1000 °C with an SDBS/Zn molar ratio of 0.075 exhibited the highest TCH adsorption (q = 80.92 mg g) owing to its relatively large BET surface area (1067.41 m g) and pore volume (1.22 cm g) and the stronger surface interaction between TCH and NHPCs (HC1000-0.075). Compared with surfactant-free ZIF-8-derived carbon (HC), introduction of SDBS in the ZIF-8 precursor not only improved the pore structure of the carbon materials but also increased the nitrogen content and the number of surface functional groups. Adsorption kinetics and isotherms showed that the pseudo-second-order model and Sips model fit the TCH adsorption behavior on HC and HC1000-0.075 well. Adsorption experiments and characterizations revealed that the adsorption mechanism involved in TCH adsorption on HC1000-0.075 mainly depended on the synergistic effect of pore filling, H-bonding, π-π interactions, and weak electrostatic interactions. This study provides an effective and simple strategy for fabricating MOF-derived NHPCs as a promising adsorbent for the removal of antibiotics from water.
以十二烷基苯磺酸钠（SDBS）为模板，通过简便的一步碳化法，成功地从软模板化的沸石咪唑酯骨架-8（ZIF-8）前驱体制备了氮掺杂分级多孔碳（NHPCs），并将其应用于盐酸四环素（TCH）的吸附。在1000℃下合成的SDBS/Zn摩尔比为0.075的NHPC表现出最高的TCH吸附量（q = 80.92 mg g），这归因于其相对较大的BET表面积（1067.41 m g）和孔体积（1.22 cm g）以及TCH与NHPCs（HC1000-0.075）之间更强的表面相互作用。与无表面活性剂的ZIF-8衍生碳（HC）相比，在ZIF-8前驱体中引入SDBS不仅改善了碳材料的孔结构，还增加了氮含量和表面官能团的数量。吸附动力学和等温线表明，准二级模型和Sips模型很好地拟合了TCH在HC和HC1000-0.075上的吸附行为。吸附实验和表征表明，HC1000-0.075上TCH吸附的吸附机制主要取决于孔填充、氢键、π-π相互作用和弱静电相互作用的协同效应。本研究为制备MOF衍生的NHPCs作为一种有前途的从水中去除抗生素的吸附剂提供了一种有效且简单的策略。
