Correction to "Controllable Synthesis of a Porous PEI-Functionalized Co3O4/rGO Nanocomposite as an Electrochemical Sensor for Simultaneous as Well as Individual Detection of Heavy Metal Ions"
1 Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, P. R. China.
2 Department of Chemistry, Khushal Khan Khattak University, Karak, 27200 Karak, Khyber Pakhtunkhawa, Pakistan.
3 Modern Experiment Center, Harbin Normal University, Harbin 150025, P. R. China.