In this study, the potential for adsorption of lithium ions (Li⁺) by pristine titanate nanotubes (pTNTs) and organic compound (OC)-functionalized TNTs was examined. We used a simple hydrothermal method for fabricating the pTNTs at 130 °C, and these synthesized p-TNTs were functionalized with different OCs, including urea, melamine, and polyacrylonitrile, using titanium (IV) oxide powder as a precursor via a wet impregnation approach. The crystallinity, morphology, and functional group properties of the prepared adsorbents were characterized. The Li⁺ adsorption mechanism is considered to be an ion exchange reaction with Li⁺ ions in solution, and H⁺ ions exist in the interlayers of the pristine and functionalized TNTs. Different kinetic models were applied to equilibrium experimental data to determine the rate and nature of the adsorption process. The recovery of Li⁺ ions was achieved by using hydrochloric acid as an extracting agent in three repeated cycles. The presented study showed that the prepared adsorbents have good potential to adsorb and desorb Li⁺ ions from aqueous solutions and can be used for future studies.

在这项研究中，研究了原始钛酸酯纳米管（pTNT）和有机化合物（OC）官能化的TNT吸附锂离子（Li ⁺）的潜力。我们使用一种简单的水热法在130°C的温度下制备pTNT，并且这些合成的p-TNT以不同的OC（包括尿素，三聚氰胺和聚丙烯腈）功能化，使用氧化钛（IV）粉末通过湿法浸渍作为前体。表征了所制备吸附剂的结晶度，形态和官能团性质。Li ^+的吸附机理被认为是与溶液中的Li ⁺离子发生离子交换反应，而H ⁺离子存在于原始TNT和功能化TNT的中间层中。将不同的动力学模型应用于平衡实验数据，以确定吸附过程的速率和性质。通过使用盐酸作为萃取剂，在三个重复循环中实现了Li ⁺离子的回收。提出的研究表明，所制备的吸附剂具有吸附和解吸水溶液中Li ⁺离子的良好潜力，可用于将来的研究。