期刊
CHEMISTRYSELECT
卷 3, 期 22, 页码 6029-6034出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201800583
关键词
Biosensor; electrocatalysis; hollow sphere; metal doped silica; nickel hydrosilicate; sol-gel synthesis; yolk-shell structure
资金
- DAE (Department of Atomic Energy, Government of India)
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Education [NRF-2014R1 A1 A2059947, NRF-2017R1D1 A1B03027982]
Yolk-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 N-2 sorption, transmission (TEM) and field-emission scanning electron microscopic (FESEM) analysis, respectively. Ni-silica yolk-shell nanostructure with around 30wt% Ni has surface area ca. 500m(2)/g with pore width ca. 3.8nm and 400-500nm 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 0.1M NaOH solution.
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