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Cobalt nickel bimetal sulfide organophosphorus pesticide biosensor and preparation method thereof

A technology of organophosphorus pesticides and biosensors, applied in the fields of instruments, scientific instruments, electrochemical variables of materials, etc., can solve the problems of online and rapid analysis and monitoring of environmental and food pollution, complex sample pretreatment, and expensive instruments, etc. Achieve high stability, good conductivity and low cost

Inactive Publication Date: 2017-04-19
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the detection methods of organophosphorus pesticides mainly include high performance liquid chromatography, gas chromatography-mass spectrometry, fluorescence and surface plasmon resonance, etc. Although these methods have obtained high sensitivity, most of the instruments they use are expensive and Large size, long test period and complex sample pretreatment limit the on-site and rapid analysis and monitoring of environmental and food contamination

Method used

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  • Cobalt nickel bimetal sulfide organophosphorus pesticide biosensor and preparation method thereof
  • Cobalt nickel bimetal sulfide organophosphorus pesticide biosensor and preparation method thereof
  • Cobalt nickel bimetal sulfide organophosphorus pesticide biosensor and preparation method thereof

Examples

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Embodiment 1

[0055] The present embodiment provides a kind of preparation method of cobalt-nickel bimetallic sulfide, comprising the following steps:

[0056] Step 1, nickel acetate tetrahydrate and cobalt acetate tetrahydrate are dissolved in 40mL of ethylene glycol containing 60mg of cationic surfactant cetyltrimethylammonium bromide according to a certain molar ratio of 1:2, and ultrasonic vibration is completely dissolved to form a transparent Solution, then add the sulfur source compound thioacetamide, the molar ratio of the sulfur element in the thioacetamide to the nickel element in nickel acetate tetrahydrate can ensure that the sulfur source compound is sufficient or slightly excessive, and ensure that the sulfur source compound It can be completely dissolved in ethylene glycol, generally take (4-4.5): 1, continue to sonicate until it is completely dissolved to obtain a mixed solution; the ultrasonic intensity of ultrasonic oscillation is 100W.

[0057] Step 2, transfer the mixed ...

Embodiment 2

[0073] The present embodiment provides a kind of preparation method of cobalt-nickel bimetallic sulfide, comprising the following steps:

[0074] Step 1, the other conditions of this step are the same as in Example 1, the only difference is that the sulfur source compound is changed from thioacetamide to L-cysteine.

[0075] Step 2, this step is the same as the step of Example 1, and cobalt-nickel bimetallic sulfide is prepared.

[0076] Product characterization: The black powder prepared in this example was detected, and the energy spectrum and X-ray diffraction pattern were the same as those in Example 1.

[0077] The SEM image of the cobalt-nickel bimetallic sulfide prepared in this example is basically the same as the SEM image of the cobalt-nickel bimetallic sulfide prepared in Example 1, which is the morphology of network hollow microspheres.

Embodiment 3

[0085] The present embodiment provides a kind of preparation method of cobalt-nickel bimetallic sulfide, comprising the following steps:

[0086] Step 1, other conditions of this step are the same as in Example 1, the only difference is that the sulfur source compound is changed from thioacetamide to thiourea.

[0087] Step 2, this step is the same as the step of Example 1, and cobalt-nickel bimetallic sulfide is obtained.

[0088] Product characterization: The black powder prepared in this example was tested, and the energy spectrum and X-ray diffraction pattern were the same as those in Example 1.

[0089]The SEM image of the cobalt-nickel bimetallic sulfide prepared in this example is basically the same as the SEM image of the cobalt-nickel bimetallic sulfide prepared in Example 1, which is the morphology of network hollow microspheres.

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Abstract

The invention provides a cobalt nickel bimetal sulfide organophosphorus pesticide biosensor, and a preparation method thereof. The cobalt nickel bimetal sulfide organophosphorus pesticide biosensor comprises a carbon paste electrode and an acetylcholinesterase layer; the surface of the carbon paste electrode is provided with modification layers including a Nafion-NiCo2S4 layer, the acetylcholinesterase layer, and a Nafion layer form interior to exterior successively. A preparation method of NiCo2S4 comprises following steps: a soluble nickel salt and a soluble cobalt salt are dissolved in an ethanediol solution containing a cationic surface active agent, and a cobalt nickel bimetal sulfide is prepared via solvothermal method. The cobalt nickel bimetal sulfide organophosphorus pesticide biosensor possesses excellent enzyme immobilization performance, is high in sensitivity and stability; immobilization of acetylcholinesterase on the surface of the carbon paste electrode is realized so as to construct the cobalt nickel bimetal sulfide organophosphorus pesticide biosensor; and the cobalt nickel bimetal sulfide organophosphorus pesticide biosensor can be applied in detection on parathion-methyl and paraoxon-methyl.

Description

technical field [0001] The invention belongs to the field of organophosphorus pesticides, and relates to a biosensor, in particular to a cobalt-nickel bimetallic sulfide organophosphorus pesticide biosensor and a preparation method. Background technique [0002] Transition metal sulfides such as CoS, NiS and MoS 2 Due to its special physical and chemical properties, it is widely used in many fields such as optoelectronics, magnetism and electrochemistry. As a new class of transition metal sulfide materials, ternary Co-Ni sulfides have excellent electrical conductivity compared with binary Co / Ni sulfides and ternary Co-Ni oxides. This is due to the low energy band gap of these materials. At present, the research on ternary Co-Ni sulfides mainly focuses on the discussion and research of synthesis methods and electrochemical applications. [0003] A nano-flaky cobalt-nickel bimetallic sulfide is disclosed in the prior art, and a nano-flaky cobalt-nickel bimetallic sulfide co...

Claims

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Application Information

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IPC IPC(8): G01N27/26G01N27/30
CPCG01N27/26G01N27/308
Inventor 彭磊董社英黄廷林
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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