Electrochemical luminescence sensor for detecting pesticide carbaryl and preparation method thereof

A carbaryl and sensor technology, applied in the field of electrochemiluminescence sensing, can solve the problems of poor water solubility and poor water solubility of graphene, and achieve the effects of low detection limit, high sensitivity and simple preparation process

Inactive Publication Date: 2014-04-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water solubility of unfunctionalized graphene is poor, and it is easy to form graphite-like through layer accumulation. Therefore, constructing graphene composite materials is an effective way to solve these problems and fully control the excellent properties of graphene.
On the other hand, metal phthalocyanine can catalyze the oxidation reaction of biomolecules, and has the function of simulating enzymes. It can catalyze dissolved oxygen to generate active oxygen groups in the solution system, but its main disadvantage is poor water solubility.

Method used

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  • Electrochemical luminescence sensor for detecting pesticide carbaryl and preparation method thereof
  • Electrochemical luminescence sensor for detecting pesticide carbaryl and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of graphene oxide-phthalocyanine composites:

[0028] GO-CoPc composites were prepared by adding 100 mg CoPc and 10 mg GO to 30 mL ionic liquid ([BMIM]PF 6 ), sonicated for 10 h, centrifuged, and washed with water in a semi-permeable membrane until the solvent [BMIM]PF 6 completely removed, then 60 o C Vacuum drying prepared GO-CoPc nanocomposites, set aside.

[0029] (2) Glassy carbon electrode (GCE) surface pretreatment:

[0030] The GCE electrode was polished with alumina powder with a particle size of 1 μm and 0.05 μm in turn, and the electrode was placed in a 5 mmol / L potassium ferricyanide solution by cyclic voltammetry, and scanned at -0.2 to 0.6 V. The peak potential difference Below 110 mV indicates that the electrode pretreatment is completed, and then ultrasonically cleaned in ethanol and double distilled water in turn, and dried with nitrogen for later use.

[0031] (3) Modification process of the ECL sensor interface:

[0032]Disperse 2...

Embodiment 2

[0034] (1) Preparation of graphene oxide-phthalocyanine composites:

[0035] GO-CoPc composites were prepared by adding 100 mg CoPc and 16 mg GO to 30 mL ionic liquid ([BMIM]PF 6 ), sonicated for 10 h, centrifuged, and washed with water in a semi-permeable membrane until the solvent [BMIM]PF 6 completely removed, then 60 o C Vacuum drying prepared GO-CoPc nanocomposites, set aside.

[0036] (2) Glassy carbon electrode (GCE) surface pretreatment:

[0037] The GCE electrode was polished with alumina powder with a particle size of 1 μm and 0.05 μm in turn, and the electrode was placed in a 5 mmol / L potassium ferricyanide solution by cyclic voltammetry, and scanned at -0.2 to 0.6 V. The peak potential difference Below 110 mV indicates that the electrode pretreatment is completed, and then ultrasonically cleaned in ethanol and double distilled water in turn, and dried with nitrogen for later use.

[0038] (3) Modification process of the ECL sensor interface:

[0039] Disperse ...

Embodiment 3

[0041] (1) Preparation of graphene oxide-phthalocyanine composites:

[0042] GO-CoPc composites were prepared by adding 100 mg CoPc and 25 mg GO to 30 mL ionic liquid ([BMIM]PF 6 ), sonicated for 10 h, centrifuged, and washed with water in a semi-permeable membrane until the solvent [BMIM]PF 6 completely removed, then 60 o C Vacuum drying prepared GO-CoPc nanocomposites, set aside. figure 1 (A) is GO, (B) is the transmission electron microscope image of GO-CoPc. It can be seen from the figure that CoPc is adsorbed on the surface of GO, indicating that the composite material was successfully prepared.

[0043] (2) Glassy carbon electrode (GCE) surface pretreatment:

[0044] The GCE electrode was polished with alumina powder with a particle size of 1 μm and 0.05 μm in turn, and the electrode was placed in a 5 mmol / L potassium ferricyanide solution by cyclic voltammetry, and scanned at -0.2 to 0.6 V. The peak potential difference Below 110 mV indicates that the electrode pret...

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Abstract

The invention relates to establishment of a pesticide carbaryl electrochemical luminescence method for simulating enzyme properties and alcohol quenching properties based on cobalt-phthalocyanine, and belongs to the field of electrochemical luminescence sensing. The method comprises the following steps: at first, preparing a composite material of cobalt-phthalocyanine and grapheme oxides (GO-CoPc) by using a simple equilibrium adsorption method; secondly, modifying the composite material on the surface of a glassy carbon electrode, and establishing an electrochemical luminescence sensing platform by using luminol as an illuminant and using ethanol as a signal quencher through mimic enzymatic property and signal amplification effect of the composite material; adding standard carbaryl solutions with different concentrations to a system to test, so as to obtain a corresponding relation between carbaryl concentrations and electrochemical luminescence intensities, and establish a sensing platform for sensitively detecting pesticide carbaryl. The invention aims to prepare an electrochemical luminiscence carbaryl sensor with simple preparation process, high sensitivity and low detection cost.

Description

technical field [0001] The present invention relates to an electrochemiluminescence sensor and its preparation method for constructing a detection platform by using cobalt phthalocyanine to simulate enzyme properties and ethanol-quenched luminescent signal characteristics, especially to an electrochemiluminescence sensor for pesticide carbaryl detection and its preparation method , belonging to the field of electrochemiluminescence sensing. Background technique [0002] Carbaryl, also known as carbaryl, chemically named 1-naphthyl-N-methylcarbamate, mixed with organophosphorus pesticides, has obvious synergistic effects on a variety of crop pests, and can be used for 141 species Crop, control 565 kinds of pests, is a widely used carbamate insecticide. Since it was synthesized for the first time by United Carbon Corporation in 1953, it has been favored by most countries in the world, and it is still a large-tonnage variety of carbamate insecticides. The extensive use of car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
Inventor 王坤杜晓娇钱静
Owner JIANGSU UNIV
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