Abstract
One dimensional terbium oxide (Tb2O3) nanotubes have been synthesized by using surfactant free precipitation method and investigated its non-enzymatic electrochemical detection for hydrogen peroxide (H2O2). The structural analysis and x-ray diffraction data confirmed the formation of cubic phase Tb2O3 in the synthesized Tb2O3 nanotubes. The optical property of the synthesized product was investigated by ultraviolet spectroscopy and photoluminescence (PL) studies. The PL spectrum of Tb2O3 nanotubes exhibited a strong green luminescence corresponding to 5D4 → 7F5 transition of Tb3+ ions. The non-enzymatic hydrogen peroxide (H2O2) sensing of Tb2O3 nanotubes/carbon paper modified electrodes in 1 M KCl electrolyte was carried out using cyclic voltammetry and amperometric (i–t) analysis. The enhanced electrocatalytic behavior was observed for Tb2O3 nanotubes with an excellent sensitivity of 875 μA mM−1 cm−2, linear ranges of 0.5–5 mM and a low detection limit of 5 μM.
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