Abstract
AbstractYolk‐shell structured Ni‐doped silica with high specific surface area and excellent thermal stability has been synthesized via a simple surfactant assisted sol‐gel mediated hydrothermal method using hexadecyltrimethylammonium bromide (CTAB) as a structure‐directing agent in water‐ethanol mixed solvent. After calcining off the organic surfactant, the resulting material shows crystallinity in powder X‐ray diffraction (XRD) analysis with formation of nickel hydrosilicate phase, Ni3Si2O5(OH)4. The mesoporosity, nanostructure and morphology of the material have been confirmed by N2 sorption, transmission (TEM) and field‐emission scanning electron microscopic (FESEM) analysis, respectively. Ni‐silica yolk‐shell nanostructure with around 30 wt% Ni has surface area ca. 500 m2/g with pore width ca. 3.8 nm and 400–500 nm particle size. X‐ray photoelectron spectroscopic (XPS) study has also been carried out to confirm the presence of Ni(II) species in the material. This yolk‐shell Ni‐doped‐silica mesostructure has been utilized successfully for non‐enzymatic glucose detection at room temperature via electrochemical sensing of D‐glucose analyte in 0.1 M NaOH solution.
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