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Citation: YU Hao, ZHENG Xiaochen, LIU Rantong, JIN Jun, JIAN Xuan. Preparation of Copper-iron Hexacyanoferrate Loaded Multi-walled Carbon Nanotubes Modified Electrode for the Determination of Nitrite[J]. Chinese Journal of Applied Chemistry, ;2014, 31(11): 1336-1344. doi: 10.3724/SP.J.1095.2014.40045 shu

Preparation of Copper-iron Hexacyanoferrate Loaded Multi-walled Carbon Nanotubes Modified Electrode for the Determination of Nitrite

1.
College of Chemistry and Chemical Engineering, Yan'an University, Yan'an 716000, China

Corresponding author: YU Hao,
Received Date: 19 February 2014
Available Online: 30 April 2014
Fund Project: 陕西省自然科学基金项目(2010JQ2005) (2010JQ2005)

A copper-iron dual metal hexacyanoferrates(CuFeHCF),multi-walled carbon nanotube(MWCNT) modified composite ceramic carbon electrode(CCE)(CuFeHCF/MWCNT/CCE) was fabricated by using cyclic voltammetry.The electrochemical behavior and the electroctalytic activity of this modified electrode were also investigated carefully.The results show that the resulting modified electrode exhibits strongly electrocatalytic activity for the oxidation of nitrite.Based on this electrocatalytic property,an amperometry for the determination of nitrite was established.Under the optimum condition,the liner relationship between the catalytic current and the nitrite concentration is in the range of 2.0×10^-7~1.4×10^-3 mol/L.The sensitivity and the detection limit are 104.1 μA/(mmol·L^-1) and 5.0×10^-8 mol/L,respectively.The proposed method was applied to detect nitrite in real samples with satisfactory results.
- metal hexacyanoferrate,
- multi-walled carbon nanotube,
- nitrite,
- electrocatalysis
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