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Citation: WEI Yan, WANG Guang-Feng, CHEN Hui, FANG Bin. Preparation of Cerium Tungstophosphoric Acid/Multiwalled Carbon Composite Modified Electrode and Its Application[J]. Chinese Journal of Applied Chemistry, ;2008, 25(5): 514-518. shu

Preparation of Cerium Tungstophosphoric Acid/Multiwalled Carbon Composite Modified Electrode and Its Application

WEI Yan ^a,b ,
WANG Guang-Feng ^a ,
CHEN Hui ^a ,
FANG Bin ^a,,

1.
a Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000;
2.
b Department of Chemistry, Wannan Medical College, Wuhu

Corresponding author: FANG Bin,
Received Date: 9 May 2007
Available Online: 28 August 2007
Fund Project: 国家自然科学基金(20675001) (20675001)安徽省教育厅自然科学基金(2006kj119B和2006kj145B)资助项目 (2006kj119B和2006kj145B)

CePW nanoparticles supported on multi-wall carbon nanotubes were prepared,and modified onto a glassy carbon electrode.Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to characterize the electrode.The electrochemical behavior of dopamine at this modified electrode was investigated,and the result showed that it gave reversible redox peaks at a formal potential of 0.173 V(pH=6.0).The anodic peak current (measured with constant potential amperometry) increased linearly with the increased concentration of dopamine in a range of 5.0×10^-7 to 5.0×10^-3 mol/L and the linear regression equation was i_p(μA)=-0.954 2+0.056 02c(μmol/L).The detection limit (S/N=3) obtained was 3.3×10^-8 mol/L.The interference of ascorbic acid to the determination of DA could be eliminated efficiently.The proposed method showed excellent sensitivity and recovery.
- CePW nanoparticles,
- multi-wall carbon nanotubes,
- chemical modified electrode,
- dopamine,
- ascorbic acid
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