Via a one-step ultrasonication method, cellulose nanofibril/graphene oxide hybrid (GO-CNF) aerogel was successfully prepared. The as-prepared GO-CNF possessed interconnected 3D network microstructure based on GO nanosheets grown along CNF through hydrogen bonds. The aerogel exhibited superior adsorption capacity toward four kinds of antibiotics. The removal percentages () of these antibiotics were 81.5%, 79.5%, 79.1%, and 73.9% for Doxycycline (DXC), Chlortetracycline (CTC), Oxytetracycline (OTC), and tetracycline (TC), respectively. Simultaneously, the adsorption isotherms were well fitted to Langmuir model and kinetics study implied that the adsorption process was attributed to pseudo-second-order model. The maximum theoretical adsorption capacities of GO-CNF were 469.7, 396.5, 386.5, and 343.8 mg·g⁻¹ for DXC, CTC, OTC, and TC, respectively, calculated by the Langmuir isotherm models. After five cycles, importantly, the regenerated aerogels still could be used with little degradation of adsorption property. Consequently, the as-synthesized GO-CNF was a successful application of effective removal of antibiotics.

中文翻译：

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一步法制备氧化石墨烯/纤维素纳米原纤混合气凝胶用于吸附去除四种抗生素

通过一步超声方法，成功制备了纤维素纳米原纤/氧化石墨杂化物（GO-CNF）气凝胶。所制备的GO-CNF具有互连的3D网络微观结构，该结构基于通过氢键沿着CNF生长的GO纳米片。气凝胶对四种抗生素具有优异的吸附能力。这些抗生素对强力霉素（DXC），金霉素（CTC），土霉素（OTC）和四环素（TC）的去除率分别为81.5％，79.5％，79.1％和73.9％。同时，吸附等温线与Langmuir模型拟合得很好，动力学研究表明吸附过程归因于伪二级模型。GO-CNF的最大理论吸附容量为469.7、396.5、386.5和343.8 mg·g ^-1分别由Langmuir等温线模型计算得出的DXC，CTC，OTC和TC。重要的是，经过五个循环后，仍可使用再生气凝胶，且吸附性能几乎不会降低。因此，合成后的GO-CNF是成功去除抗生素的成功应用。