Lithium-ion sieves (LIS) have gained significant interest in lithium recovery from geothermal water. However, the severe loss and low recyclability of the powder adsorbents restrict their practical application. Here, the symmetric mixed matrix membranes adsorbents of LIS (MMMs-LIS) were prepared after doping the dopamine-modified LIS into polysulfone (PSf) matrix by breath figure approach with the characters of low thickness, high exposure area of H₂TiO₃ (HTO) and high structural stability. The hydrophilic dopamine (DA) would probably promote the condensate water droplets to penetrate PSf matrix and make the smaller HTO/DA preferably emerge on the pore surfaces, accelerating the intercalation of Li⁺ into the vacancies of HTO on the premise of the strengthened interfacial interaction between HTO/DA and PSf matrix. Therefore, the well-designed MMMs processed a comparable Li⁺ adsorption capacity of 25.01 mg·g⁻¹ and an equilibrium adsorption time of 45 min to powdery HTO during the dynamic adsorption process at 298.15 K (C₀ = 25.78 mg·L⁻¹, pH = 12.0). Moreover, Ti⁴⁺ loss rate of HTO in MMMs decreased from 10.5% down to 1.1% after the first desorption and then gradually alleviated after multiple cycles until stabilized at 2.3%, indicating the excellent structural stability. These results suggest the great potentials of MMMs for highly efficient and sustainable lithium recovery from geothermal water.

锂离子筛 (LIS) 在从地热水中回收锂方面引起了极大的兴趣。然而，粉末吸附剂的严重损失和低可回收性限制了它们的实际应用。在此，采用呼吸图法将多巴胺修饰的LIS掺杂到聚砜（PSf）基质中，制备了具有低厚度、高H ₂ TiO ₃暴露面积（ HTO) 和高结构稳定性。亲水性多巴胺（DA）可能会促进冷凝水滴渗透PSf基质，使较小的HTO/DA优先出现在孔表面，加速Li ^{+的嵌入。}在 HTO/DA 与 PSf 基体之间的界面相互作用增强的前提下，将 HTO 的空位引入。因此，精心设计的 MMM在 298.15 K（C 0 ⁼ _25.78 ^mg  ·L ^-1 , pH = 12.0)。此外，MMMs中HTO的Ti ⁴⁺损失率在第一次解吸后从10.5%下降到1.1%，然后在多次循环后逐渐缓解，直至稳定在2.3%，表明结构稳定性良好。这些结果表明 MMM 在从地热水中高效和可持续地回收锂方面具有巨大潜力。