Facile One‐Pot Synthesis of Yolk‐Shell Structured Ni Doped Mesoporous Silica and Its Application in Enzyme‐Free Glucose Sensor

Abstract

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 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.

Natural Wollastonite-Derived Two-Dimensional Nanosheet Ni3Si2O5(OH)4 as a Novel Carrier of CdS for Efficient Photocatalytic H2 Generation

“…The specific surface area of CdS/NS was reduced to be 137 m 2 /g, with a pore volume of 0. 4c), the peak at 102.67 eV was assigned to Si in the silicon oxygen tetrahedron in the metal silicate hydride [41]. Additionally, in the O 1s spectrum of Ni 3 Si 2 O 5 (OH) 4 (Figure 4d), the peaks observed at 530.96 eV, 531.87 eV, and 532.87 eV were associated with Ni-O, Si-O, and O-H bonds [42][43][44], respectively.…”

Recent Developments on the Catalytic and Biosensing Applications of Porous Nanomaterials

“…The high sensitivity of the material was attributed to the synergistic effect between the metal ion and the high surface area porous silica, which ensured an optimal platform for metal ion-analyte interaction. A Ni-doped silica with nickel hydrosilicate (Ni3Si2O5(OH)4), presenting a yolk-shell morphology, also exhibited excellent performance for the non-enzymatic electrochemical detection of glucose at room temperature (Figure 16) [219].…”

“…The high sensitivity of the material was attributed to the synergistic effect between the metal ion and the high surface area porous silica, which ensured an optimal platform for metal ion-analyte interaction. A Ni-doped silica with nickel hydrosilicate (Ni 3 Si 2 O 5 (OH) 4 ), presenting a yolk-shell morphology, also exhibited excellent performance for the nonenzymatic electrochemical detection of glucose at room temperature (Figure 16) [219]. Metal oxides and hydroxides are also good electrochemical glucose sensors, as reported by Bhaumik et al Although both Ni(OH)2 and NiO nanostructures have been used for enzyme-free glucose sensing, NiO exhibits a comparatively higher sensitivity than its hydroxide analog [191].…”

Synthesis of ordered Ca- and Li-doped mesoporous silicas for H2 and CO2 adsorption at ambient temperature and pressure

“…Additionally these composite materials are very easy to synthesize using a cationic surfactant, metal and tetraethyl orthosilicate (TEOS) as a silica precursor via a sol–gel condensation reaction in basic conditions, owing to the electrostatic interaction of cationic surfactant and hydrolysed anionic silica precursor. 22 In particular, there are very few previous reports in the literature showing the characteristics of both CO 2 capture and H 2 storage ability at ambient temperature and pressure. 23 …”