Cr(VI) Reduction and Immobilization by Core-Double-Shell Structured Magnetic Polydopamine@Zeolitic Idazolate Frameworks-8 Microspheres
Cr(VI) Reduction and Immobilization by Core-Double-Shell Structured Magnetic Polydopamine@Zeolitic Idazolate Frameworks-8 Microspheres
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核-双壳结构磁性聚多巴胺@沸石咪唑啉骨架-8微球对Cr(VI)的还原和固定化
DOI：
10.1021/acssuschemeng.7b01036
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发表时间：
2017-07
影响因子：
8.4
通讯作者：
Hayat Tasawar
中科院分区：
文献类型：
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作者：
Zhu Kairuo;Chen Changlun;Xu Huan;Gao Yang;Tan Xiaoli;Alsaedi Ahmed;Hayat Tasawar
采用简单、绿色的方法制备了核-壳结构良好的磁性聚多巴胺@沸石咪唑骨架-8（MP@ZIF-8）包覆微球，该微球由磁性Fe 3 O 4纳米粒子核、聚多巴胺层内壳和多孔ZIF-8微球外壳组成，实现了协同还原和吸附去除Cr（VI）.系统地表征了微球的性质。批量吸附实验表明，MP@ZIF-8表现出高效率的Cr（VI）去除水溶液中，提供Cr（VI）去除容量为136.56 mg g-1，超过原始MP（92.27 mg g-1）。Cr（VI）去除动力学符合准二级动力学模型。MP@ZIF-8上的Cr（VI）去除高度依赖于pH值。更重要的是，随着ZIF-8和PDA上氮原子基团的还原，Cr（VI）容易转化为低毒性的Cr（III），然后固定在MP@ZIF-8上。因此，杂化微球提供了优异的…
A well-defined core-double-shell structured magnetic polydopamine@zeolitic idazolate frameworks-8 (MP@ZIF-8) hydrid microsphere consisting of the core of magnetic Fe3O4 nanoparticles, the inner shell of a polydopamine layer, and the outer shell of a porous ZIF-8 nanocrystal was prepared through a facile and green approach to achieve synergistic reduction and adsorptive removal of Cr(VI). The microsphere property was characterized methodically. The batch adsorption experiments showed that the MP@ZIF-8 exhibited high efficiency in the Cr(VI) removal from aqueous solutions, affording Cr(VI) removal capacity of 136.56 mg g–1, surpassing pristine MP (92.27 mg g–1). The pseudo-second-order model fitted the Cr(VI) removal kinetics well. Cr(VI) removal on the MP@ZIF-8 relied highly on pH values. More significantly, with the reduction of nitrogen atom group on ZIF-8 and PDA, Cr(VI) was easily converted into low toxicity Cr(III) and then immobilized on the MP@ZIF-8. Thus, the hybrid microspheres provided excellent ...
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影响因子：
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影响因子：
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影响因子：
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