title: Polyacrylamide-phytic acid-polydopamine conducting porous hydrogel for rapid detection and removal of copper (II) ions.
abstract: In this work, a conducting porous polymer hydrogel-based electrochemical sensor has been developed for rapid detection of copper (II) ions (Cu2+). The polymer (termed as PAAM/PA/PDA) hydrogel is prepared through multi-interactions of the monomers dopamine (DA), acrylamide (AAM) and phytic acid (PA) under mild ambient conditions: the AAM polymerizes through free-radical polymerization, DA occurs poly coupling reaction, and PA crosslinks polydopamine (PDA) and polyacrylamide (PAAM) by hydrogen bonds. The three dimensional (3D) network nanostructured PAAM/PA/PDA hydrogel not only provides a large surface area for increasing the amount of immobilized molecules/ions, but also exhibits a good conductivity. The PAAM/PA/PDA hydrogel-based electrochemical sensor exhibits a low detection limit (1nmolL-1, S/N=3) and wide linear range (from 1nmolL-1to 1µmolL-1) for Cu2+detection in aqueous samples. Furthermore, the Cu2+can be sensitively detected by the electrochemical sensor in different sample matrices, indicating that the electrochemical sensor could be used to monitor Cu2+with reasonable assay performance in practical samples. The PAAM/PA/PDA hydrogel also exhibits a good capacity to remove Cu2+(231.36±4.70mgg-1), which is superior to those of other adsorption materials reported in the literature. The facile synthesized PAAM/PA/PDA hydrogel provides a novel and regenerable platform for monitoring and removing Cu2+in real samples.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China; University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, P. R. China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.
authors.forename: Hongda
authors.initials: H
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China. Electronic address: malina@ciac.ac.cn.
authors.forename: Lina
authors.initials: L
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China. Electronic address: wangzx@ciac.ac.cn.
authors.forename: Zhenxin
authors.initials: Z
authors.lastname: Wang
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D000818:Animals; D002413:Cations, Divalent / Q000032:analysis / Q000097:blood / Q000302:isolation & purification; D002417:Cattle; D003300:Copper / Q000032:analysis* / Q000097:blood / Q000302:isolation & purification; D004553:Electric Conductivity; D055664:Electrochemical Techniques / Q000191:economics / Q000379:methods*; D004867:Equipment Design; D005504:Food Analysis / Q000191:economics / Q000379:methods; D000067030:Fruit and Vegetable Juices / Q000032:analysis; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D057230:Limit of Detection; D008892:Milk / Q000737:chemistry; D010833:Phytic Acid / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D002413:Cations, Divalent; D003300:Copper; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D007211:Indoles; D010833:Phytic Acid; D011108:Polymers; D000099166:Polyacrylamides; C568283:polydopamine
keywords: Conducting porous polymer hydrogel; Electrochemical sensor; Monitor copper (II) ions; Remove Cu(2+)