Facile Preparation of Ion-Imprinted Chitosan Microspheres Enwrapping Fe3O4 and Graphene Oxide by Inverse Suspension Cross-Linking for Highly Selective Removal of Copper(II)
Facile Preparation of Ion-Imprinted Chitosan Microspheres Enwrapping Fe3O4 and Graphene Oxide by Inverse Suspension Cross-Linking for Highly Selective Removal of Copper(II)
复制标题
通过反悬浮交联轻松制备包裹 Fe3O4 和氧化石墨烯的离子印迹壳聚糖微球，用于高选择性去除铜 (II)
DOI：
10.1021/acssuschemeng.7b01761
复制
发表时间：
2017-08-01
影响因子：
8.4
通讯作者：
Ren, Zhongqi
中科院分区：
文献类型：
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作者：
Kong, Delong;Wang, Nian;Ren, Zhongqi
采用离子印迹和反相悬浮交联相结合的方法制备了一种新型磁性铜印迹壳聚糖/氧化石墨烯复合生物材料，并将其用于水溶液中Cu（II）的选择性吸附。在制备过程中加入氧化石墨烯和三甘氨酸，交联程度较低，可获得较高的铜吸附容量。采用FT-IR、TGA、SEM、EDX等手段对所制备的离子印迹磁性壳聚糖聚合物微球进行了表征。结果表明，CS-IIP的制备成功，且具有良好的热稳定性。考察了pH值、接触时间、Cu（II）浓度等实验条件对吸附容量的影响。吸附过程符合Freundlich等温方程和准二级动力学模型。CS-IIP的最高吸附容量为132 mg g-1。计算了CS-IIP对Cu ~（2+）/M ~（2+）（M = Zn，Ni，Co，o）的选择因子和相对选择因子。
A novel magnetic copper imprinted chitosan/graphene oxide composite biomaterial was prepared by the combination of ion imprinting and inverse suspension cross-linking for selective adsorption of Cu(II) from aqueous solution. High adsorption capacity for copper was obtained with a low level cross-linking and the addition of graphene oxide and triglycine in the preparing process. The prepared ion-imprinted magnetic chitosan polymer microsphere (CS-IIP) was characterized by FT-IR, TGA, SEM, and EDX. The results indicated that the CS-IIP was prepared successfully and showed good thermostability. Effects of different experimental conditions like pH value, contact time, and Cu(II) concentration on the adsorption capacity were investigated. The adsorption process follows the Freundlich isotherm equation and the pseudo-second-order kinetic model. The highest adsorption capacity of CS-IIP was 132 mg g–1. The calculation of selective factors and relative selectivity factors of CS-IIP for Cu2+/M2+ (M = Zn, Ni, Co, o...