Efficient photoelectrochemical sensor of Cu2+ based on ZnO-graphene nanocomposite sensitized with hexagonal CdS by calcination method

Publication Name

Journal of Electroanalytical Chemistry


A novel ternary nanocomposite of CdSH/ZnO-GE was prepared for photoelectrochemical (PEC) selective sensing of Cu2+. ZnO nanorods and graphene (GE) nanosheets were first decorated on Ni foam (NF) simultaneously by a facile hydrothermal method and then CdS nanoparticles were loaded on ZnO-GE arrays through simple chemical bath deposition (CBD) method and following calcination process to form hexagonal CdS (CdSH). The obtained CdSH/ZnO-GE@NF sensor was characterized by scanning electron micrographs, X-ray diffraction and X-ray photoelectron spectroscopy. The CdSH/ZnO-GE@NF electrode exhibited enhanced photoelectrical activity with a photocurrent density of 6.8 mA·cm−2 under illumination at 0.5 V vs. SCE. For the PEC detection of Cu2+, the as-prepared sensor exhibited a low detection limit of 0.03 μM and wide linear concentration rang of 0.2 μM to 1 mM with high selectivity and stability. It was successfully applied to the detection of Cu2+ in real industrial waste water and sea water, suggesting that the CdSH/ZnO-GE@NF electrode is a promising sensor to detect copper pollution in natural environments.

Open Access Status

This publication is not available as open access



Article Number


Funding Number


Funding Sponsor

Huaihai Institute of Technology



Link to publisher version (DOI)