College of Textile and Clothing Engineering, Soochow University, Suzhou, 215021, PR China.
College of Textile and Clothing Engineering, Soochow University, Suzhou, 215021, PR China.
Carbohydr Polym. 2017 Jun 15;166:271-280. doi: 10.1016/j.carbpol.2017.02.109. Epub 2017 Mar 4.
The present study describes the preparation of a hybrid cellulose-based adsorbent (HM-cotton) containing a dot-plane composite adsorption system. The dot-plane adsorption structure is formed by the plane of hyperbranched polymer (HBP) layer distributed by the functional mesoporous nanoparticle (CA-MSN) dots, fabricating hyperbranch-mesostructure system via self-assembly. The resultant adsorbent HM-cotton was characterized, and the adsorption mechanism for dyes and metal ions was also discussed in detail. The results show that the adsorption data is fitted to Pseudo-second-order kinetic model and Langmuir isotherm model, and owing to the dot-plane system possessing functional mesostructure of CA-MSNs with large surface area and substantial adsorption sites from HBP macromolecules, HM-cotton exhibits versatile, highly-efficiency and sustainable adsorption properties for dyes such as CR and MB, and metal ions such as Fe and Cu from aqueous media. The saturated adsorption capacities are 243.7, 165.4, 143.8 and 119.1mg/g for CR, MB, Fe and Cu, respectively.
本研究描述了一种含有点-面复合吸附系统的混合纤维素基吸附剂（HM-cotton）的制备。点-面吸附结构是由功能介孔纳米颗粒（CA-MSN）点分布的超支化聚合物（HBP）层的平面形成的，通过自组装构建超支化介孔体系。对所得吸附剂 HM-cotton 进行了表征，并详细讨论了其对染料和金属离子的吸附机制。结果表明，吸附数据符合准二级动力学模型和 Langmuir 等温线模型，由于点-面系统具有 CA-MSN 的功能介孔结构，具有大的表面积和大量的 HBP 大分子吸附位点，HM-cotton 对 CR 和 MB 等染料以及 Fe 和 Cu 等金属离子从水介质中表现出多功能、高效和可持续的吸附性能。CR、MB、Fe 和 Cu 的饱和吸附容量分别为 243.7、165.4、143.8 和 119.1mg/g。
