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Hydrothermal synthesis of NiWO4 crystals for high performance non-enzymatic glucose biosensors.

Mani S, Vediyappan V, Chen SM, Madhu R, Pitchaimani V, Chang JY, Liu SB - Sci Rep (2016)

Bottom Line: A facile hydrothermal route for the synthesis of ordered NiWO4 nanocrystals, which show promising applications as high performance non-enzymatic glucose sensor is reported.The NiWO4-modified electrodes showed excellent sensitivity (269.6 μA mM(-1 )cm(-2)) and low detection limit (0.18 μM) for detection of glucose with desirable selectivity, stability, and tolerance to interference, rendering their prospective applications as cost-effective, enzyme-free glucose sensors.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan.

ABSTRACT
A facile hydrothermal route for the synthesis of ordered NiWO4 nanocrystals, which show promising applications as high performance non-enzymatic glucose sensor is reported. The NiWO4-modified electrodes showed excellent sensitivity (269.6 μA mM(-1 )cm(-2)) and low detection limit (0.18 μM) for detection of glucose with desirable selectivity, stability, and tolerance to interference, rendering their prospective applications as cost-effective, enzyme-free glucose sensors.

No MeSH data available.


TEM images of the as-synthesized NiWO4 microcrystals.Inset in (B) shows the corresponding SAED pattern.
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f3: TEM images of the as-synthesized NiWO4 microcrystals.Inset in (B) shows the corresponding SAED pattern.

Mentions: The transmission electron microscope (TEM) images of the as-prepared NiWO4 material (Fig. 3) reveal crystals composing of aggregated nanoparticles with an average particle size of ca. 10–20 nm. The selected area electron diffraction (SAED) pattern in Fig. 3B (inset) clearly show the anticipated bright spots with rings, indicating the presence of particles with high crystallinity,in good agreement with the XRD data (Fig. 2F). The textural properties of the as-synthesized NiWO4 crystals were studied by nitrogen (N2) adsorption/desorption isotherms at 77 K, as shown in Fig. 4A. The NiWO4 crystals exhibited the type-IV isotherm curve with a sharp capillary condensation steps at a relative pressure (P/P0) range of 0.43–0.63, which revealed characteristics of a mesostructured materials. Accordingly, the corresponding Brunauer-Emmet-Teller (BET) surface area, total pore volume, and Barrett-Joyner-Halenda (BJH) pore size determined by the adsorption branch of the isotherm was found to be 70.7 m2 g−1, 0.07 cm3 g−1, and 4.19 nm, respectively. Furthermore, the thermal stability of the NiWO4 material was assessed by means of thermogravimetric analysis (TGA), as shown in Fig. 4B. The weight-loss at temperatures less than 100 °C (ca. 0.25 wt%) is attributed to the desorption of water molecules, whereas, the notable weight-loss (ca. 3.2 wt%) in the temperature range of 220–480 °C may be attributed to the decomposition of small amount of grafted metal hydroxides. Whilst the marginal weight-loss beyond 480 °C is most likely due to the formation of intermediate compounds30.


Hydrothermal synthesis of NiWO4 crystals for high performance non-enzymatic glucose biosensors.

Mani S, Vediyappan V, Chen SM, Madhu R, Pitchaimani V, Chang JY, Liu SB - Sci Rep (2016)

TEM images of the as-synthesized NiWO4 microcrystals.Inset in (B) shows the corresponding SAED pattern.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4834566&req=5

f3: TEM images of the as-synthesized NiWO4 microcrystals.Inset in (B) shows the corresponding SAED pattern.
Mentions: The transmission electron microscope (TEM) images of the as-prepared NiWO4 material (Fig. 3) reveal crystals composing of aggregated nanoparticles with an average particle size of ca. 10–20 nm. The selected area electron diffraction (SAED) pattern in Fig. 3B (inset) clearly show the anticipated bright spots with rings, indicating the presence of particles with high crystallinity,in good agreement with the XRD data (Fig. 2F). The textural properties of the as-synthesized NiWO4 crystals were studied by nitrogen (N2) adsorption/desorption isotherms at 77 K, as shown in Fig. 4A. The NiWO4 crystals exhibited the type-IV isotherm curve with a sharp capillary condensation steps at a relative pressure (P/P0) range of 0.43–0.63, which revealed characteristics of a mesostructured materials. Accordingly, the corresponding Brunauer-Emmet-Teller (BET) surface area, total pore volume, and Barrett-Joyner-Halenda (BJH) pore size determined by the adsorption branch of the isotherm was found to be 70.7 m2 g−1, 0.07 cm3 g−1, and 4.19 nm, respectively. Furthermore, the thermal stability of the NiWO4 material was assessed by means of thermogravimetric analysis (TGA), as shown in Fig. 4B. The weight-loss at temperatures less than 100 °C (ca. 0.25 wt%) is attributed to the desorption of water molecules, whereas, the notable weight-loss (ca. 3.2 wt%) in the temperature range of 220–480 °C may be attributed to the decomposition of small amount of grafted metal hydroxides. Whilst the marginal weight-loss beyond 480 °C is most likely due to the formation of intermediate compounds30.

Bottom Line: A facile hydrothermal route for the synthesis of ordered NiWO4 nanocrystals, which show promising applications as high performance non-enzymatic glucose sensor is reported.The NiWO4-modified electrodes showed excellent sensitivity (269.6 μA mM(-1 )cm(-2)) and low detection limit (0.18 μM) for detection of glucose with desirable selectivity, stability, and tolerance to interference, rendering their prospective applications as cost-effective, enzyme-free glucose sensors.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan.

ABSTRACT
A facile hydrothermal route for the synthesis of ordered NiWO4 nanocrystals, which show promising applications as high performance non-enzymatic glucose sensor is reported. The NiWO4-modified electrodes showed excellent sensitivity (269.6 μA mM(-1 )cm(-2)) and low detection limit (0.18 μM) for detection of glucose with desirable selectivity, stability, and tolerance to interference, rendering their prospective applications as cost-effective, enzyme-free glucose sensors.

No MeSH data available.