Carbon Letters ( IF 5.5 ) Pub Date : 2022-03-31 , DOI: 10.1007/s42823-022-00336-8 Ye Jiang 1, 2 , Sijie Wan 1 , Weihua Zhou 1 , Weiwei Zhao 2 , Wenjie Yu 2, 3 , Shuaipeng Wang 2 , Zeqi Yu 2, 3 , Xiaoqing Liu 2 , Qiu Yang 4
|
The hybridization of graphene with magnetic nanoparticles has endowed graphene with increasing interest as the adsorbent for wastewater treatment. However, its fabrication often involves a multi-stepped chemical synthesis process. In this work, we demonstrate a facile, one-step, and solvent-free approach to fabricate Fe3O4 nanoparticle-anchored Laser-Induced Graphene (Fe3O4@LIG) as an efficient adsorbent by direct laser irradiation on a ferric acetylacetonate containing polybenzoxazine film. Raman and X-ray diffraction analysis confirm the graphene component in the adsorbent, and the morphology characterizations show that Fe3O4 nanoparticles are distributed uniformly on LIG with hierarchical meso- and macro-porous structures. Adsorption experiments indicate that Fe3O4@LIG can adsorb methylene blue (MB) from aqueous solutions in a fast and effective manner, with a maximum adsorption capacity up to 350.9 mg/g. The adsorption kinetics and isotherms are also investigated, which are well-described by the pseudo-second-order model and Langmuir model, respectively. Additionally, Fe3O4@LIG is also demonstrated with the efficient removal of a variety of organic solvents from water. The favorable adsorption behavior of Fe3O4@LIG is attributed to its unique porous structure and the molecular interactions with adsorbates. On the other hand, Fe3O4@LIG has high magnetic property, and therefore, it could be easily recovered from water and well regenerated for repeated use. With the efficient adsorption of organic pollutants, magnetic separability, and good recyclability, it is believed that the easy-fabricated Fe3O4@LIG has great potential applications in wastewater treatment.
Graphical abstract
中文翻译：
可重复使用的磁性激光诱导石墨烯有效去除水中的有机污染物
石墨烯与磁性纳米粒子的杂化使得石墨烯作为废水处理的吸附剂越来越受到关注。然而，其制造通常涉及多步化学合成过程。在这项工作中，我们展示了一种简便、一步、无溶剂的方法，通过在铁上直接激光照射来制造 Fe 3 O 4纳米颗粒锚定的激光诱导石墨烯 (Fe 3 O 4 @LIG) 作为高效吸附剂。含有乙酰丙酮化物的聚苯并恶嗪薄膜。拉曼和X射线衍射分析证实了吸附剂中的石墨烯成分，形貌表征表明Fe 3 O 4纳米粒子均匀分布在具有分级中孔和大孔结构的 LIG 上。吸附实验表明，Fe 3 O 4 @LIG 可以快速有效地从水溶液中吸附亚甲基蓝（MB），最大吸附量可达 350.9 mg/g。还研究了吸附动力学和等温线，它们分别由准二级模型和朗缪尔模型很好地描述。此外，Fe 3 O 4 @LIG 还可以有效去除水中的多种有机溶剂。Fe 3 O 4的良好吸附行为@LIG 归功于其独特的多孔结构和与吸附物的分子相互作用。另一方面，Fe 3 O 4 @LIG 具有高磁性，因此可以很容易地从水中回收并很好地再生以重复使用。易于制备的Fe 3 O 4 @LIG具有对有机污染物的高效吸附、磁分离性和良好的可回收性等优点，在废水处理中具有巨大的应用潜力。
京公网安备 11010802027423号