biostudies-literatureRehman AUDepartment of Education, Heilongjiang ProvinceHeilongjiang Province Innovation and Entrepreneurship Training Project for College StudentsInnovative Research TeamNational Natural Science Foundation of China5870-5882https://www.ebi.ac.uk/biostudies/studies/S-EPMC8867791biostudies-literatureUnknown7(7)The present study focuses on the strategy of employing an electrochemical sensor with a porous polyethylenimine (PEI)-functionalized Co₃O₄/reduced graphene oxide (rGO) nanocomposite (NCP) to detect heavy metal ions (HMIs: Cd²⁺, Pb²⁺, Cu²⁺, and Hg²⁺). The porous PEI-functionalized Co₃O₄/rGO NCP (rGO·Co₃O₄·PEI) was prepared via a hydrothermal method. The synthesized NCP was based on a conducting polymer PEI, rGO, nanoribbons of Co₃O₄, and highly dispersed Co₃O₄ nanoparticles (NPs), which have shown excellent performance in the detection of HMIs. The as-prepared PEI-functionalized rGO·Co₃O₄·PEI NCP-modified electrode waACS omegaControllable Synthesis of a Porous PEI-Functionalized Co₃O₄/rGO Nanocomposite as an Electrochemical Sensor for Simultaneous as Well as Individual Detection of Heavy Metal Ions.PMC88677912167010747PEBM201502RC2012XK01800512521421IRT1237201610231042Liu YFayaz MZhang JWang RLv HRehman AUWang YDu LShi KfalseControllable Synthesis of a Porous PEI-Functionalized Co₃O₄/rGO Nanocomposite as an Electrochemical Sensor for Simultaneous as Well as Individual Detection of Heavy Metal Ions.The present study focuses on the strategy of employing an electrochemical sensor with a porous polyethylenimine (PEI)-functionalized Co₃O₄/reduced graphene oxide (rGO) nanocomposite (NCP) to detect heavy metal ions (HMIs: Cd²⁺, Pb²⁺, Cu²⁺, and Hg²⁺). The porous PEI-functionalized Co₃O₄/rGO NCP (rGO·Co₃O₄·PEI) was prepared via a hydrothermal method. The synthesized NCP was based on a conducting polymer PEI, rGO, nanoribbons of Co₃O₄, and highly dispersed Co₃O₄ nanoparticles (NPs), which have shown excellent performance in the detection of HMIs. The as-prepared PEI-functionalized rGO·Co₃O₄·PEI NCP-modified electrode wa2022-01-01T00:00:00Z2022 Feb2025-06-01T01:32:54.89Z2025-06-01T01:32:54.89ZS-EPMC88677913522434810.1021/acsomega.1c05989