Exceptional ion-exchange selectivity for perchlorate based on polyaniline films

被引：24
作者：
Gao, Mingming [1 ]
Yang, Ying [1 ]
Diao, Muhe [1 ]
Wang, Shu-guang [1 ]
Wang, Xin-hua [1 ]
Zhang, Guohui [1 ]
Zhang, Gang [1 ]
机构：
[1] Shandong Univ, Sch Environm Sci & Engn, Shandong Prov Key Lab Water Pollut Control & Reso, Jinan 250100, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2011年 / 56卷 / 22期
基金：
中国国家自然科学基金;
关键词：
Polyaniline films; Perchlorate removal; Ion-exchange selectivity; Electrochemical studies; BEHAVIOR; POLYPYRROLE; ANIONS; ACID; ELECTRODES; MORPHOLOGY; RELEASE; CARBON;
D O I：
10.1016/j.electacta.2011.06.071
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Polyaniline (PANI) films were electrochemically synthesized on graphite electrode and their ion-exchange selectivities for ClO4- were investigated. Cyclic voltammetry (CV) results showed that PANI-H2SO4 film represented higher selectivity for ClO4- than PANI-HCl and PANI-HClO4. Furthermore, the CV records of PANI-H2SO4 film in different acidic solutions demonstrated that ClO4- exchange was performed in a lower potential range (from -0.025 V to 0.097V), which is distinguished from SO42- and Cl-. Additionally, chronoamperomertry (CA) studies of PANI-H2SO4 film in 0.1 M various acidic solutions (H2SO4, HCl and HClO4) confirmed that the diffusion coefficient values in HClO4 (13.319/18.184 x 10(-6) cm(2) s(-1)) were the biggest during doping/de-doping process. The exceptional ion-exchange selectivity for ClO4- was explained by the process of dominant accumulation, quick insertion of anions, and the sluggish mobility of ClO4- inside the membrane. Results of present work demonstrated that PANI may serve as a promising membrane for ClO4- removal by ion-exchange process. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：7644 / 7650
页数：7
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