Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 15, Pages 7224-7231Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm30237c
Keywords
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Funding
- Program for the National Natural Science Foundation of China [51072172]
- International Joint Research Program of Hunan Province [2010WK2009]
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In this study, Ni(SO4)(0.3)(OH)(1.4) nanobelts have been synthesized via a simple template-free hydrothermal reaction in an aqueous solution containing nickel sulfate and sodium acetate. It is found that the molar ratio of nickel sulfate to sodium acetate plays a very important role in determining the morphology of the final product. Subsequently, core-shell Ni(SO4)(0.3)(OH)(1.4)/C composite nanobelts have been synthesized from the carbonization and polymerization of glucose under mild hydrothermal conditions in the presence of newly produced Ni(SO4)(0.3)(OH)(1.4) nanobelts. The shell thickness of the core-shell nanobelts can be varied from 2 to 18 nm by adjusting the concentration of glucose. Additionally, the structural evolution from core-shell Ni(SO4)(0.3)(OH)(1.4)/C to NiO/C has been successfully performed through ex situ heat treatment. The belt-like morphology has still been maintained after heat treatment at 600 degrees C for 2 h. The as-prepared NiO/C composites were directly immobilized onto the surface of glassy carbon electrode (GCE) for nonenzymatic glucose determination. The fabricated glucose sensor has an ultrasensitive response (149.11 mu A mM(-1)) and a low detection limit of 9.12 nM (signal/noise ratio (S/N) = 3), which are among the best values reported in the literature.
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