In this work, novel NiSiO@NiAlFe layered double hydroxides (LDHs) hollow spheres were prepared by hydrothermal method. It was worth noting that LDHs’ grafting towards NiSiO hollow spheres could avoid the LDHs’ aggregation, and thus enhanced the material’s adsorption capacity. Furthermore, adsorption kinetics, adsorption isotherms, and Box-Behnken Design (BBD) model were conducted. Results indicated that NiSiO@NiAlFe LDHs hollow spheres had sufficient adsorption capability towards Cs⁺. The adsorption kinetics satisfied the pseudo-second-order adsorption model, Temkin model and Langmuir isotherm model. The adsorption process was efficient at the alkaline condition (pH = 10). The adsorption kinetics indicated that the adsorption process could reach the equilibrium in only 20 min. The maximum adsorption capacity of Cs⁺ towards NiSiO@NiAlFe LDHs hollow spheres was estimated to be 61.5 mg g⁻¹. Moreover, the adsorption thermodynamics indicated that the adsorption process was exothermal, feasible and spontaneous. Thus, NiSiO@NiAlFe LDHs hollow spheres presented a broad potential for treating cesium containing wastewater.

通过水热法制备了新型的NiSiO @ NiAlFe层状双氢氧化物（LDHs）空心球。值得注意的是，LDHs接枝到NiSiO中空球上可以避免LDHs的聚集，从而提高了材料的吸附能力。此外，进行了吸附动力学，吸附等温线和Box-Behnken Design（BBD）模型。结果表明，NiSiO @ NiAlFe LDHs空心球对Cs ⁺具有足够的吸附能力。。吸附动力学满足拟二级吸附模型，Temkin模型和Langmuir等温模型。在碱性条件下（pH = 10），吸附过程是有效的。吸附动力学表明，吸附过程仅需20分钟即可达到平衡。Cs ⁺对NiSiO @ NiAlFe LDHs中空球的最大吸附能力估计为61.5 mg g ^-1。此外，吸附热力学表明吸附过程是放热的，可行的和自发的。因此，NiSiO @ NiAlFe LDHs中空球体在处理含铯废水方面具有广阔的潜力。