Inorganic nanocomposites have attracted continuous attention as low cost and eco-friendly adsorbents. However, low adsorption rate and poor cycle performance limit their further application. Herein, lanthanum oxide (LO) ceramic nanowires decorated with nickel nanoparticles (NiNPs) have been synthesized by a facile electrospinning method. The decomposition of polymer precursor left high pore volume in the resultant ceramic nanowires, giving the nanowires a high surface area. The NiNPs-LO nanowires can remove various dye contaminants with adsorption rate constant higher than most adsorbents. More importantly, the NiNPs-LO nanowires can be separated and reused conveniently with stable cyclic performance, avoiding not only energy consumption but also secondary pollution. The adsorption performance fits well with pseudo-second-order and Langmuir isothermal model, indicating a monolayer adsorption process. Combined with structural and FT-IR analysis, the excellent adsorption ability is mainly ascribed to the electron interaction between the composite interfaces and contaminates under the assistance of high surface area and porosity. This work provides an ideal recyclable adsorbent for the ultra-fast water purification.

无机纳米复合材料作为低成本和生态友好型吸附剂已引起了持续关注。但是，低吸附速率和较差的循环性能限制了它们的进一步应用。本文中，已经通过简便的电纺丝法合成了装饰有镍纳米粒子（NiNPs）的氧化镧（LO）陶瓷纳米线。聚合物前体的分解在所得的陶瓷纳米线中留下高孔隙体积，从而使纳米线具有高表面积。NiNPs-LO纳米线可以以比大多数吸附剂更高的吸附速率常数去除各种染料污染物。更重要的是，NiNPs-LO纳米线可以以稳定的循环性能方便地分离和重复使用，不仅避免了能耗，而且避免了二次污染。吸附性能与拟二级和Langmuir等温模型非常吻合，表明了单层吸附过程。结合结构分析和FT-IR分析，其优异的吸附能力主要归因于在高表面积和孔隙率的帮助下，复合物界面和污染物之间的电子相互作用。这项工作为超快速水净化提供了理想的可回收吸附剂。