An electrochemically switchable triiodide-ion-imprinted PPy membrane for highly selective recognition and continuous extraction of iodide
An electrochemically switchable triiodide-ion-imprinted PPy membrane for highly selective recognition and continuous extraction of iodide
复制标题
电化学可切换三碘离子印迹 PPy 膜，用于高选择性识别和连续提取碘化物
DOI：
10.1016/j.seppur.2020.117312
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发表时间：
2020-11-15
影响因子：
8.6
通讯作者：
Tang, Bing
中科院分区：
文献类型：
--
作者：
Luo, Jinhua;Du, Xiao;Tang, Bing
在新型电化学开关离子膜萃取（ESIME）工艺中，成功制备了一种由均匀碗状颗粒组成的电化学可切换三碘离子印迹聚吡咯（PPy/I-3(-)）膜，该膜具有高选择性识别和连续提取水溶液中的碘化物。结果,PPy /我(-)膜与ESIME流程显示高I -离子通量的2.87 x 10 (4) g.cm h(1),(2)高分离因子为3.44,3.98,5.02和5.27为I - Br - Cl -、SO42 -和PO43 -阴离子,分别和优良的循环稳定性提取率94.8%即使10-cycle重用在优化条件下电池电压为1.8 V,脉冲的潜力-0.8 V / + 0.95 V, 20多岁的脉冲宽度。采用ESIME工艺制备的PPy/I-3（-）膜有望成为连续、高效、环保地从工业水系统中提取目标I-的理想选择。
An electrochemically switchable triiodide-ion-imprinted polypyrrole (PPy/I-3(-)) membrane composed of uniform bowl-shape particles with an interconnected ant-nest-like structure was successfully developed for the highly selective recognition and continuous extraction of iodide from the aqueous solutions in a novel electrochemically switched ion membrane extraction (ESIME) process. As a result, the PPy/I-3(-) membrane with the ESIME process displayed a high I- ion flux of 2.87 x 10(-4) g.cm(-2.)h(-1), high separation factors of 3.44, 3.98, 5.02 and 5.27 for I- over Br-, Cl-, SO42- and PO43- anions, respectively, and excellent cycling stability with an extraction efficiency of 94.8% even after 10-cycle reuse at the optimized conditions with a cell voltage of 1.8 V, a pulse potential of -0.8 V/+0.95 V, a pulse width of 20 s. It is expected that the PPy/I-3(-) membrane with ESIME process could be a promising candidate for the continuous, efficient and eco-friendly extraction of target I- from industrial water system.