A novel unipolar pulsepotential oscillation system based on HKUST-1(C)@CoAl LDH film for selective separation of dodecyl sulfonate ions
A novel unipolar pulsepotential oscillation system based on HKUST-1(C)@CoAl LDH film for selective separation of dodecyl sulfonate ions
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基于HKUST-1(C)@CoAl LDH薄膜的新型单极脉冲电势振荡系统用于选择性分离十二烷基磺酸根离子
DOI：
10.1016/j.seppur.2021.118488
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发表时间：
2021-02
影响因子：
8.6
通讯作者：
Guan Guoqing
中科院分区：
文献类型：
--
作者：
Gao Fengfeng;Wang Jian;Jiang Mengfang;Du Xiao;Ma Xuli;Hao Xiaogang;Yue Xiuping;Guan Guoqing
采用两步电化学法在铜网上成功制备了具有三维孔道结构的碳化HKUST-1@煤基层状双氢氧化物(HKUST-1(C)@Coal LDH)薄膜，并将其应用于新型单极脉冲电位振荡体系中对稀疏十二烷基磺酸盐离子(DS−)的选择性分离。在科大讯飞1(C)@煤基水滑石薄膜中，以煤基水滑石为分离层，以科大讯飞1(C)为储存层，提高了对DS−离子的选择性，从而提高了对DS−离子的吸附量。结果表明，3DHKUST-1(C)@煤基水滑石薄膜涂层电极对DS-−离子具有良好的选择性，吸附容量高达733.84 mg g−1，具有良好的电化学稳定性。更重要的是，这种新型的UPPO体系可以有效地减少共存阴离子对DS−离子吸附的影响，并通过周期性的电位振荡加速DS−离子在膜中的传输，有望用于从实际废水中选择性地分离DS−离子。
A carbonized HKUST-1@CoAl layered double hydroxide (HKUST-1(C)@CoAl LDH) film with a three-dimensional (3D) porous structurewas successfully prepared on the copper mesh by using a two-step electrochemical deposition method, and applied in a novel unipolar pulse potential oscillation (UPPO) system for selective separation of dilute dodecyl sulfonate ions (DS−). In the HKUST-1(C)@CoAl LDH film, the CoAl LDH was served as a separating layer to improve the selectivity for DS−ions with the HKUST-1(C) as a storage layer to increase the adsorption amount of DS−ions. As a result, the 3D HKUST-1(C)@CoAl LDH film coated electrode showed excellent selectivity toward DS−ions with a high adsorption capacity of 733.84 mg g−1and favorable electrochemical stability. More importantly, it is found that such a novel UPPO system can effectively reduce the influence of co-existing anions on the adsorption of DS−ions and accelerate the transport of DS−ions in the film by the periodic potential oscillation, which is expected to be used for the selective separation of DS−ions from practical wastewater.
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