Articles written in Journal of Chemical Sciences

    • Synthesis of silver nanoparticles-decorated FePO4 nanosphere at a gas-liquid interface for the electrochemical detection of Hydrogen peroxide


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      Silver nanoparticles were prepared by chemical reduction of acetaldehyde gas in the absence ofprotective gas, and Ag/Fe$PO_{4}$ nanocomposites were synthesised by modified silver mirror reaction at a gasliquidinterface. A hydrogen peroxide $(H_{2}O_{2})$ electrochemical sensor was constructed through immobilizing Ag/Fe$PO_{4}$ nanocomposites on gold (Au) electrode. The morphology and composition of the nanocompositeswere characterized by transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy(EDS). The electrochemical investigations of the sensor indicated that it exhibited excellent analytical performancewith a wide linear range from $3.0 \times 10^{-5}$and $1.1 \times 10^{-2}mol $L^{-1}$ a low detection limit of 4.7μmol.$L^{-1} at a signal-to-noise ratio of 3. Meanwhile, it also showed acceptable reproducibility and anti-interference ability.This study may provide a new method for the synthesis of highly dispersed metal nanoparticles which mightbe used in other related fields.

    • Novel Nanocomposite of Chitosan-protected Platinum Nanoparticles Immobilized on Nickel Hydroxide: Facile Synthesis and Application as Glucose Electrochemical Sensor


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      Novel nanocomposite of nickel hydroxide/chitosan/platinum was successfully synthesised with chitosan (CS) as a dispersing and protecting agent. Its potential application in non-enzymatic electrochemical glucose sensor was studied. Scanning electron microscopy (SEM), transmission electron microscopy (TEM)and energy-dispersive X-ray spectroscopy (EDX) were used to characterize the composition and morphology of this nanocomposite. The electrochemical investigations of this glucose sensor exhibited remarkable analyticalperformances towards the oxidation of glucose. In particular, glucose can be selectively and sensitively detected in a wide linear range from 3.0×10⁻⁶ to 1.1×10⁻² mol·L⁻¹with a detection limit of 0.56±0.03 μmol·L⁻¹ at a signal-tonoise ratio of 3 (S/N = 3). Furthermore, the Ni(OH)₂/CS/Pt nanocomposite-modified GCE also showed an acceptable anti-interference ability and stability. Importantly, the Ni(OH)₂/CS/Pt based sensor can be used to detect trace amount of glucose in serum samples. The results demonstrated that the Ni(OH)₂/CS/Pt nanocomposite can be potentially useful to construct a new glucose sensing platform.

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