Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China.
Innovation Center for Textile Science & Technology, Donghua University, Shanghai 201620, China.
Nanoscale. 2019 Oct 28;11(40):18653-18661. doi: 10.1039/c9nr07342f. Epub 2019 Oct 4.
In this work, β-cyclodextrin (β-CD) based hollow nanoparticles (denoted as β-CDHN) with abundant active sites and high specific surface area were first fabricated via a facile one-step method. The β-CDHN presented a maximum adsorption capacity of 2080.35, 427.35 and 120.48 mg g towards the cationic dye methylene blue (MB), heavy metal ions (Pb) and bisphenol A (BPA), respectively, much higher than those of many other adsorbents. Furthermore, β-CDHN also exhibited fast adsorption kinetics towards these pollutants with adsorption rate constants 6 to 200 times higher than those of activated carbon and other β-CD-based adsorbents, meaning the former can remove these pollutants at a much faster adsorption rate than the latter adsorbents. More importantly, the removal efficiency of these pollutants on β-CDHN almost remained stable after 10 regeneration cycles with favorable recyclability. The prepared β-CDHN show great potential in practical applications due to their low costs and high efficiency in the treatment of organic and inorganic pollutants from wastewater.
在这项工作中，通过简便的一步法首次制备了具有丰富活性位点和高比表面积的β-环糊精（β-CD）空心纳米粒子（表示为β-CDHN）。β-CDHN 对阳离子染料亚甲基蓝（MB）、重金属离子（Pb）和双酚 A（BPA）的最大吸附容量分别为 2080.35、427.35 和 120.48mg g-1，远高于许多其他吸附剂。此外，β-CDHN 对这些污染物也表现出快速的吸附动力学，其吸附速率常数比活性炭和其他基于β-CD 的吸附剂高 6 到 200 倍，这意味着前者可以比后者以更快的吸附速率去除这些污染物。更重要的是，这些污染物在β-CDHN 上的去除效率在 10 次再生循环后几乎保持稳定，具有良好的可循环性。由于β-CDHN 具有低成本和高效去除废水中有机和无机污染物的特点，因此在实际应用中具有很大的潜力。
