reduced graphene oxide/platinum(II) tetraphenylporphyrin nanocomposite (RGO/
Pt‐TPP)‐modified glassy carbon electrode was developed for the selective detection
of hydrazine. The RGO/Pt‐TPP nanocomposite was successfully prepared via
noncovalent π–π stacking interaction. The prepared nanocomposite was characterized
using nuclear magnetic resonance, electrochemical impedance, ultraviolet–visible
and Raman spectroscopies, scanning electron microscopy and X‐ray diffraction.
The electrochemical detection of hydrazine was performed via cyclic voltammetry

tMercury (Hg(II)) is considered as one of the most toxic element that directly affects the human healthand the environment. Therefore, in this study, we propose a sensitive and disposable electrochem-ical sensor for the detection of Hg(II) in various water samples using polypyrrole (PPy) decoratedgraphene/-cyclodextrin (GR-CD) composite modified screen-printed carbon electrode (SPCE).