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Ce-N-C nano-enzyme and application thereof in organophosphorus pesticide residue detection

A technology of organophosphorus pesticides and nanozymes, which is applied in the direction of color/spectral characteristic measurement, analysis through chemical reaction of materials, and material analysis through observation of the influence on chemical indicators, etc., to achieve convenient and efficient detection and mild reaction conditions , not easy to preserve the effect

Active Publication Date: 2021-09-21
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem of the lack of hydrolysis of the organophosphorus pesticide paraoxon in the prior art and its efficient and convenient detection, the invention provides a Ce-N-C nanozyme

Method used

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  • Ce-N-C nano-enzyme and application thereof in organophosphorus pesticide residue detection
  • Ce-N-C nano-enzyme and application thereof in organophosphorus pesticide residue detection
  • Ce-N-C nano-enzyme and application thereof in organophosphorus pesticide residue detection

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Experimental program
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Effect test

Embodiment 1

[0029] The synthesis of embodiment 1Ce-N-C nanozyme

[0030] (a) Weigh 3g of glucose (Glucose), 8g of dicyandiamide (DICY) in a 100mL beaker, then add 3mmol / L Ce(SO 4 ) 2 4H2 O solution was stirred at room temperature for 10 h to obtain a homogeneous solution product, which was centrifuged and vacuum-dried to obtain a white powder.

[0031] (b) take by weighing the white powder that makes in step (a) and place in clean quartz boat, and quartz boat is placed in tube furnace, under N 2 Under the protection of the atmosphere, heat up to the target reaction temperature of 800 °C at a heating rate of 4 °C / min, and continue to keep warm for 2.5 h; during the cooling process, continue to feed N 2 ; After the tube furnace is naturally cooled to room temperature, collect the black powder in the quartz boat, which is the Ce-N-C nanozyme; the obtained Ce-N-C nanozyme is observed by a transmission electron microscope, and the figure 1 The TEM image of the Ce-N-C nanozyme shows that the...

Embodiment 2

[0032] The synthesis of embodiment 2Ce-N-C nanozyme

[0033] (a) Weigh 1g of glucose (Glucose), 5g of dicyandiamide (DICY) in a 100mL beaker, then add 1mmol / L Ce(SO 4 ) 2 4H 2 O solution, stirred at room temperature for 8 h, the obtained product was centrifuged and vacuum-dried to obtain a white powder.

[0034] (b) take by weighing the white powder that makes in step (a) and place in clean quartz boat, and quartz boat is placed in tube furnace, under N 2 Under the protection of atmosphere, heat up to the target reaction temperature of 700 °C at a heating rate of 3 °C / min, and continue to keep warm for 2 h; during the cooling process, continue to feed N 2 ; After the tube furnace is naturally cooled to room temperature, collect the black powder in the quartz boat, which is Ce-N-C nanozyme.

Embodiment 3

[0035] Synthesis of embodiment 3 Ce-N-C nanozyme

[0036] (a) Weigh 5g of glucose (Glucose), 10g of dicyandiamide (DICY) in a 100mL beaker, then add 5mmol / L Ce(SO 4 ) 2 4H 2 O solution was stirred at room temperature for 12 h, the obtained product was centrifuged and vacuum-dried to obtain a white powder.

[0037] (b) take by weighing the white powder that makes in step (a) and place in clean quartz boat, and quartz boat is placed in tube furnace, under N 2 Under the protection of the atmosphere, heat up to the target reaction temperature of 950 °C at a heating rate of 5 °C / min, and continue to keep warm for 3 h; during the cooling process, continue to feed N 2 ; After the tube furnace is naturally cooled to room temperature, collect the black powder in the quartz boat, which is Ce-N-C nanozyme.

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Abstract

The invention belongs to the technical field of pesticide residue detection, and discloses a Ce-N-C nano-enzyme and application thereof in organophosphorus pesticide residue detection. The Ce-N-C nano enzyme has biomimetic hydrolase activity. According to the synthesis method of the Ce-N-C nano-enzyme, glucose and dicyanodiamine are taken as precursors, Ce (SO4) 2.4 H2O is added, so that a reaction can be performed to obtain a reaction product, high-temperature pyrolysis is carried out on the reaction product to prepare the Ce-N-C nano-enzyme. The Ce-N-C nano-enzyme is applied to detection of paraoxon of an organophosphorus pesticide. The preparation method of the Ce-N-C nano-enzyme is simple; and hydrolysis and rapid detection of the Ce-N-C on the paraoxon of the organophosphorus pesticidecan be completed.

Description

technical field [0001] The invention belongs to the technical field of pesticide residue detection, in particular to a Ce-N-C nanozyme and its application in the detection of organophosphorus pesticide residues. Background technique [0002] Organophosphorus pesticides have played an important role in crop production since their inception, and play an important role in preventing and controlling plant diseases and insect pests, removing weeds, and regulating crop growth. With the continuous improvement of people's living standards in our country, the quality and safety of agricultural products has attracted more and more attention, especially the problem of pesticide residues in vegetables and fruits has become the focus of public attention. Pesticide residues will not only pollute the environment, but also enter the human body through various channels, block the transmission of neurotransmitters, cause nervous system dysfunction, cause people's physical discomfort, and even...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/33
CPCG01N21/78G01N21/33
Inventor 盖盼盼蒲黎李峰
Owner QINGDAO AGRI UNIV
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