Electrochemically Switched Ion Exchange Properties of PANI-SnP Composite Films in Wastewater Containing Ni²⁺ and Cd²⁺

Authors

Yan-ting Feng, Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;
Jun-qiang Xiao, Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;
Xiao-gang Hao, Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;Follow
Xu-li Ma, Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;
Zhong-de Wang, Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;
Nian-chen Han, Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;

Corresponding Author

Xiao-gang Hao(xghao@tyut.edu.cn)

Abstract

Electroactive PANI-SnP composite films were prepared by drop-coating method on Pt electrodes and investigated as electrochemically switched ion exchange (ESIX) materials for the separation of Cd²⁺ from aqueous solutions. The composition and morphology of the composite film were characterized by Fourier transform infrared spectrometer (FTIR) and scanning electron microscope (SEM). In solutions containing 0.1 mol·L^-1 Ni(NO₃)₂ and Cd(NO₃)₂, cyclic voltammetry (CV) and electrochemical quartz crystal microbalance (EQCM) were used to investigate the electrochemical behavior and ion-exchange mechanism of PANI-SnP composite film. The elementary composition of PANI-SnP composite films in both oxidation and reduction states were also characterized by energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). Experimental results show that the PANI-SnP composite films have reversible electrochemical behavior in aqueous solutions containing Cd²⁺ and Ni²⁺, respectively. The PANI-SnP composite film electrodes displayed a high selectivity toward Cd²⁺ in Cd²⁺/Ni²⁺ binary mixtures and the Cd²⁺ ions could be separated effectively from aqueous solutions by ESIX processes.

Graphical Abstract

Keywords

electrochemically switched ion exchange, electroactive PANI-SnP, composite film, Cd(II) separation

DOI Link

https://doi.org/10.61558/2993-074X.2116

Publication Date

2013-08-28

Online Available Date

2013-01-16

Revised Date

2013-01-11

Received Date

2012-12-25

Recommended Citation

Yan-ting Feng, Jun-qiang Xiao, Xiao-gang Hao, Xu-li Ma, Zhong-de Wang, Nian-chen Han. Electrochemically Switched Ion Exchange Properties of PANI-SnP Composite Films in Wastewater Containing Ni²⁺ and Cd²⁺[J]. Journal of Electrochemistry, 2013 , 19(4): 322-327.
DOI: 10.61558/2993-074X.2116
Available at: https://jelectrochem.xmu.edu.cn/journal/vol19/iss4/3