原位生成微晶纤维素基复合分层材料的制备及吸附性能研究

The Preparation and Absorption Performance of Microcrystalline Cellulose-based Hierarchical Composites

本文以微晶纤维素(MCC)为载体,采用原位生成法,以高锰酸钾(KMnO_4)和硫酸锰(MnSO_4)为纳米二氧化锰前驱体,制得单层覆盖均匀的微晶纤维素基复合分层材料MCC-MnO_2,并对其微观结构和化学构成进行了表征,通过模拟Pb^(2+)吸附实验探讨了时间t和前驱体高锰酸钾(KMnO_4)的浓度对吸附效果的影响。实验结果表明:当高锰酸钾的浓度为4 mmol/L、吸附时间为400 min时,MCC-MnO_2对Pb^(2+)的吸附容量达到最大值,其饱和吸附容量高达265.3 mg/g。

In this paper,in-situ synthesis of manganese dioxide was carried out by using KMnO4 and MnSO4 as raw materials and microcrystalline cellulose as a carrier,and then the hierarchical composites were prepared.The microstructure and chemical composition of MnO2/cellulose were characterized by SEM,EDS,FT-IR and XPS.The effects of time and the concentration of the precursor KMnO4 on the adsorption of heavy metal ions were also discussed.The results showed that the layered composites MnO2/cellulose have the highest adsorption capacity to Pb2＋ when the quality of the precursor KMnO4 was 4 mmol/L and the time was 400 min.The maximum adsorption capacity to Pb2＋ can reach 265.3 mg/g.