193. Highly sensitive nonenzymatic glucose and H2O2 sensor based on Ni(OH)2/electroreduced graphene oxide?Multiwalled carbon nanotube film modified glass carbon electrode.
作者：W. Gao, W. W. Tjiu, J. C. Wei, T. X. Liu*
關(guān)鍵字：Graphene, Multi-walled carbon nanotubes, Ni(OH)2, Glucose sensor, Hydrogen peroxide sensor.
論文來源：期刊
具體來源：Talanta, 2014, 120, 484-490.
發(fā)表時(shí)間：2014年
In this article, an nonenzymatic
sensor based on Ni(OH)2/electroreduced graphene oxide (ERGO)-multiwalled carbon nanotube
(MWNT) nanocomposites is fabricated via convenient electrodeposition of Ni(OH)2 nanoparticles on ERGO-MWNT film modified glass carbon electrode (GCE). Graphene
oxide (GO) sheets can serve as surfactants to stabilize the dispersion of
pristine MWNTs in aqueous solution, rendering a fine coverage of ERGO-MWNT film
on GCE during the fabrication process. MWNTs perform as conducting bridges
between ERGO sheets to enhance the electron transfer rate in the substrate. By
combining the advantages of ERGO and MWNTs, together with electrocatalytic
effect of Ni(OH)2 nanoparticles, the well-designed nanocomposites
exhibit excellent sensing behavior towards glucose and hydrogen peroxide (H2O2).
The linear detection ranges for glucose and H2O2 are 10 μM ~
1500 μM and 10 μM ~ 9050 μM while the detection limits are 2.7 μM and 4.0 μM, respectively.
Furthermore, a very high sensitivity is achieved with 2042 μAmM-1cm-2 estimated for
glucose and 711 μAmM-1cm-2 for H2O2.
These results suggest that Ni(OH)2/ERGO-MWNT nanocomposites thus
easily prepared through a green electrochemical method are promising electrode
materials for biosensing. Additionally, good recoveries of analytes in real samples
like urine and milk confirm the reliability of the prepared sensor in practical
applications.