Cyclodextrin-based nanosponges (CDNS) are a novel kind of polymers belonged to cross-linked derivatives of cyclodextrins, and they are safe, biodegradable materials with appreciable toxicity to the environment. In this work, CDNS were fabricated in one-step solvothermal method by β-cyclodextrin (β-CD) and diphenyl carbonate (DPC), for the removal of dyestuffs from wastewater using two of the familiar dyes as the model contaminant. It was systematically investigated by the influence of the amount of adsorbent, the molar ratio of β-CD and DPC, pH, time, and initial concentration. Experimental results showed the maximum adsorption capacities of Basic red 46 and Rhodamine B were 101.43 mg/g and 52.33 mg/g, the adsorption behavior of two contaminants followed pseudo-second-order model and the Langmuir monolayer adsorption models. The differences in adsorption capacities on two model contaminants might due to the influence of dye structure. In conclusion, cyclodextrin-based nanosponges are a promising kind of environment-friendly materials in water treatment.

基于环糊精的纳米海绵（CDNS）是属于环糊精交联衍生物的新型聚合物，是安全，可生物降解的材料，对环境具有明显的毒性。在这项工作中，CDNS是通过β-环糊精（β-CD）和碳酸二苯酯（DPC）一步溶剂热法制备的，用于使用两种常见的染料作为模型污染物从废水中去除染料。通过吸附剂用量，β-CD与DPC的摩尔比，pH，时间和初始浓度的影响进行了系统的研究。实验结果表明，碱性红46和若丹明B的最大吸附容量分别为101.43 mg / g和52.33 mg / g，两种污染物的吸附行为遵循拟二级模型和Langmuir单层吸附模型。在两种模型污染物上的吸附能力差异可能是由于染料结构的影响。总之，基于环糊精的纳米海绵是一种有前途的水处理环保材料。