In-situ reducing platinum nanoparticles on covalent organic framework as a sensitive electrochemical sensor for simultaneous detection of catechol, hydroquinone and resorcinol.

In this present work, a COF based electrochemical sensor is successfully fabricated by employing TFPB-BD-COF prepared through condensation reaction of 1, 3, 5-tris-(4-formylphenyl) benzene (TFPB) and benzidine (BD), in-situ reduced platinum nanoparticles (PtNPs) and amino functionalized multi-walled carbon nanotubes (NH 2 -MWCNTs) as modified materials for sensitive electrochemical determination of catechol (CC), hydroquinone (HQ) and resorcinol (RS) simultaneously. The obtained TFPB-BD-COF/PtNPs/NH 2 -MWCNTs/GCE exhibits superior electrochemical performance compared with those modified by individual components. The oxidation peaks of CC, HQ and RS show good linear response in the concentration ranges of 0.2–360 μM, 0.2–360 μM and 4–360 μM, respectively. The corresponding limits of detection (LODs) of CC, HQ and RS were 0.015 μM, 0.022 μM and 0.26 μM (S/N = 3). In addition, it possesses outstanding selectivity, repeatability, reproducibility and stability. The proposed modified electrode has been successfully applied for the determination of HQ, CC and RS in tap water, Yellow River water and domestic wastewater with satisfactory. [Display omitted] [ABSTRACT FROM AUTHOR]