Dual-Functionalized Hollow Polymer Particle as a pH-Responsive Adsorbent for Selective Removal of Basic Dye
Dual-Functionalized Hollow Polymer Particle as a pH-Responsive Adsorbent for Selective Removal of Basic Dye
复制标题
双功能中空聚合物颗粒作为 pH 响应型吸附剂用于选择性去除碱性染料
DOI：
10.1002/cjoc.201600681
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发表时间：
2017
影响因子：
5.4
通讯作者：
Yang Wantai
中科院分区：
文献类型：
--
作者：
Chen Dong;Liu Yang;Qin Yan;Wang Li;Ma Yuhong;Yang Wantai
在目前的工作中，专门设计和制造了具有高密度羧酸根和氨基双官能团的新型双官能化空心聚合物颗粒（DF-HPP），作为选择性去除碱性染料（亚甲基蓝，b-MB，作为模型染料）的高性能吸附剂。由于高表面积和极高密度的羧酸根和氨基，DF-HPP 对亚甲基蓝（b-MB）表现出优异的吸附性能，包括高吸附容量、快速吸附/解吸速率、独特的 pH 敏感性和易于回收。使用Freundlich和Langmuir等温线模型评估b-MB在DF-HPPs上的平衡吸附数据，平衡等温线与Langmuir模型更加吻合，在pH 12时最大吸附容量为538.8 mg/g。更有趣的是，DF-HPPs表现出显着的pH依赖性平衡吸附容量，随着溶液pH值从12降低，平衡吸附容量从516.1 mg/g急剧下降到24 mg/g。 3.吸附染料的DF-HPPs可以在温和条件下（弱酸性溶液，pH 3，30分钟内）轻松快速地再生，以回收b-MB和DF-HPPs，并且再生的DF-HPPs可以重新用于高效的染料去除，这表明DF-HPPs具有出色的可回收性。
In the present work, novel dual‐functionalized hollow polymer particles (DF‐HPP) with high density of carboxylate and amino dual functional groups have been specially designed and fabricated to serve as high‐performance adsorbent for selective removal of basic dye (methylene blue,b‐MB, as a model dye). Due to both the high surface area and the extremely high density of carboxylate and amino groups, the DF‐HPPs exhibited excellent adsorption property for methylene blue (b‐MB), including high adsorption capacity, fast adsorption/desorption rates, unique pH‐sensitivity and easy recovery. The equilibrium adsorption data ofb‐MB on the DF‐HPPs were evaluated using Freundlich and Langmuir isotherm models, and the equilibrium isotherm was better fit with Langmuir model with a maximum adsorption capacity of 538.8 mg/g at pH 12. More interestingly, the DF‐HPPs showed a significant pH‐dependent equilibrium adsorption capacity, which decreased dramatically from 516.1 mg/g to 24 mg/g as the solution pH decreased from 12 to 3. The dye‐adsorbed DF‐HPPs can be facilely and rapidly regenerated under mild condition (under weak acidic solution, pH 3, in 30 min) to recover bothb‐MB and the DF‐HPPs, and the regenerated DF‐HPPs can be reused for dye removal with high efficiency, indicating the exceptional recyclability of the DF‐HPPs.