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Novel electrode material, preparation method and detection of p-nitrophenol by modified electrode

A p-nitrophenol, electrode material technology, applied in conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, material electrochemical variables, etc., can solve the problems of time-consuming, expensive, complicated operation, etc. Detection limit, improved sensitivity, reduced effect of overpotential

Inactive Publication Date: 2015-10-28
TECHN CENT FOR SAFETY OF INDAL PRODS TIANJIN ENTRY EXIT INSPECTION QUARANTINE BUREAU
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Problems solved by technology

[0003] Although there are many detection methods for nitrophenol compounds, such as chromatographic analysis methods, high performance liquid chromatography, high performance capillary electrophoresis and gas chromatography, most of the methods are complicated to operate, time-consuming and expensive.

Method used

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  • Novel electrode material, preparation method and detection of p-nitrophenol by modified electrode
  • Novel electrode material, preparation method and detection of p-nitrophenol by modified electrode
  • Novel electrode material, preparation method and detection of p-nitrophenol by modified electrode

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Embodiment 1

[0021] Step 1: Purification of single-walled carbon nanotubes:

[0022] Weigh 200 mg of single-walled carbon nanotubes and add them to 150 mL of concentrated sulfuric acid:concentrated nitric acid (3:1) mixed solution, sonicate for 3 h, then sonicate for 3 h after 20 min, stir and reflux in an oil bath at 80 °C for 4 h , washed with water to pH 5, and freeze-dried into dry powder.

[0023] The second step: the preparation of single-walled carbon nanotube-aminoferrocene:

[0024] Accurately weigh 16 mg of aminoferrocene into a 50 mL flask, add 4 mL of N,N-dimethylformamide and ultrasonically disperse it evenly, then add 6 mL of 0.5 M hydrochloric acid solution and stir evenly, then add 8.4 mg sodium nitrite. Stir under the protection of argon, and keep in an ice bath at 0 °C for 30 min. In addition, 4 mg single-walled carbon nanotubes were precisely weighed and added to 10 mL N,N-dimethylformamide, sonicated for 30 min to disperse evenly, then added to the above system, stir...

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Abstract

The invention relates to a novel electrode material used for detecting p-nitrophenol and preparation and application of the novel electrode material. The novel electrode material is a single-walled carbon nanotube-aminoferrocene composite material prepared from single-walled carbon nanotubes and aminoferrocene by virtue of a diazo reaction, and the composite material is used as the electrode material for modifying a glassy carbon electrode so as to detect trace nitrophenol compounds. The electrochemical result shows that the oxidation peak potential of the modified electrode on nitrophenol response is obviously reduced, and the peak current is greatly enhanced. The method is fast in current response, high in sensitivity and low in detection limit and has good application prospects.

Description

technical field [0001] The invention relates to a novel electrode material for detecting p-nitrophenol and its preparation and application, specifically the preparation method and electrochemical application based on a functionalized single-walled carbon nanotube-aminoferrocene compound, belonging to the field of environmental protection. Background technique [0002] Since Ijima discovered one-dimensional tubular carbon in 1991, it is an ideal material for chemical and biochemical detection due to its high electrical conductivity and excellent current-carrying properties. When used as electrode materials for electrochemical detection, they have been shown to have greatly enhanced electron transfer capabilities. The carbon nanotube modified electrode can reduce the overpotential of the substrate, increase the current response, and reduce the detection limit, which shows unique advantages in electrocatalysis research. [0003] Although there are many detection methods for ni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48H01B1/24H01B13/00
Inventor 周磊赵琢闫婧刘凤娟
Owner TECHN CENT FOR SAFETY OF INDAL PRODS TIANJIN ENTRY EXIT INSPECTION QUARANTINE BUREAU
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