title: Facile preparation of electroactive amorphous α-ZrP/PANI hybrid film for potential-triggered adsorption of Pb(2+) ions.
abstract: An electroactive hybrid film composed of amorphous α-zirconium phosphate and polyaniline (α-ZrP/PANI) is controllably synthesized on carbon nanotubes (CNTs) modified Au electrodes in aqueous solution by cyclic voltammetry method. Electrochemical quartz crystal microbalance (EQCM), scanning electron microscopy (SEM) and X-ray power diffraction (XRD) analysis are applied for the evaluation of the synthesis process. It is found that the exfoliated amorphous α-ZrP nanosheets are well dispersed in PANI and the hydrolysis of α-ZrP is successfully suppressed by controlling the exfoliation temperature and adding appropriate supporting electrolyte. The insertion/release of heavy metals into/from the film is reversibly controlled by a potential-triggered mechanism. Herein, α-ZrP, a weak solid acid, can provide an acidic micro-environment for PANI to promote the electroactivity in neutral aqueous solutions. Especially, the hybrid film shows excellent potential-triggered adsorption of Pb(2+) ion due to the selective complexation of Pb(2+) ion with oxygen derived from P-O-H of α-ZrP. Also, it shows long-term cycle stability and rapid potential-responsive adsorption/desorption rate. This kind of novel hybrid film is expected to be a promising potential-triggered ESIX material for separation and recovery of heavy metal ions from wastewater.
authors.affiliation: Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
authors.forename: Quan
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China; North Japan Research Institute for Sustainable Energy (NJRISE), Hirosaki University, 2-1-3, Matsubara, Aomori 030-0813, Japan.
authors.forename: Xiao
authors.initials: X
authors.lastname: Du
authors.affiliation: Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
authors.forename: Xuli
authors.initials: X
authors.lastname: Ma
authors.affiliation: Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China. Electronic address: tyutxghao@hotmail.com.
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Hao
authors.affiliation: North Japan Research Institute for Sustainable Energy (NJRISE), Hirosaki University, 2-1-3, Matsubara, Aomori 030-0813, Japan.
authors.forename: Guoqing
authors.initials: G
authors.lastname: Guan
authors.affiliation: Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
authors.forename: Zhongde
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
authors.forename: Chunfeng
authors.initials: C
authors.lastname: Xue
authors.affiliation: Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
authors.forename: Zhonglin
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Zuo
mesh_terms: D000327:Adsorption; D000814:Aniline Compounds / Q000737:chemistry*; D055664:Electrochemical Techniques; D004566:Electrodes; D004573:Electrolytes / Q000737:chemistry; D006868:Hydrolysis; D007854:Lead / Q000302:isolation & purification*; D049329:Nanostructures; D012834:Silver; D013499:Surface Properties; D015040:Zirconium / Q000737:chemistry*
chemical_list: D000814:Aniline Compounds; D004573:Electrolytes; C416807:polyaniline; C027006:zirconium phosphate; D007854:Lead; D012834:Silver; D015040:Zirconium
keywords: Electroactive; Electrochemically switched ion exchange; Heavy metal ions; Selective separation