In this study, a new composite with layered double hydroxides (LDHs) anchored grown on expanded graphite (EG) interlayers was prepared by vacuum-assisted intercalation and hydrothermal method. Both sides of EG were completely covered by highly dispersed LDHs nanosheets and formed a sandwich-like structure. The unique structure made expanded graphite/layered double hydroxides (EG/LDHs) composites which had excellent F^- adsorption performance. The adsorption performance of F^- on EG/LDHs was evaluated, and the results indicated that the adsorption process was consistent with the pseudo-second-order kinetic model and the Langmuir model. Pseudo-second-order kinetic model indicated that the adsorption sites were the main factor in the adsorption process. Moreover, the maximum adsorption capacity (Q_m) reached 63.21 mg·g^-1 at 30 min at room temperature, which was better than most of the same type of adsorbents. The highly dispersed of LDHs anchored growth on EG overcame the disadvantage of aggregation, which exposed more adsorption sites and improved the removal efficiency of F^-. In addition, the effects of pH, anion interference, different water quality, and regeneration tests on the EG/LDHs composites were also analyzed, showing that the composites have good stability.

在这项研究中，通过真空辅助插层和水热法制备了一种在膨胀石墨 (EG) 夹层上锚定生长的层状双氢氧化物 (LDH) 的新型复合材料。EG的两面都被高度分散的LDHs纳米片完全覆盖，形成三明治状结构。独特的结构使膨胀石墨/层状双氢氧化物（EG/LDHs）复合材料具有优异的F-^吸附性能。F-的吸附^性能对 EG/LDHs 进行了评价，结果表明吸附过程符合准二级动力学模型和 Langmuir 模型。拟二级动力学模型表明吸附位点是吸附过程的主要因素。此外，室温下30 min时的最大吸附量（Q _m）达到63.21  mg·g ^{-1 ，优于大多数同类型吸附剂。} LDHs在EG上的高度分散锚定生长克服了聚集的缺点，暴露了更多的吸附位点，提高了F-的去除效率^。. 此外，还分析了pH、阴离子干扰、不同水质、再生试验对EG/LDHs复合材料的影响，表明复合材料具有良好的稳定性。