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A preparation method of carbon quantum dot-molecularly imprinted composite material and a method for analyzing the residue of pesticide mesotrione by using it

A technology of carbon quantum dots and molecular imprinting, which is applied in the field of preparation of carbon quantum dots-molecular imprinting composite materials, can solve the problems of long analysis time of mesotrione, high cost of synthesis method, large environmental pollution, etc., and achieve the realization of waste recycling Utilization, detection time is short, the effect of little environmental pollution

Active Publication Date: 2019-05-21
NORTHEAST FORESTRY UNIVERSITY
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of long analysis time of mesotrione, low selectivity, high cost of synthesis method of quantum dot-molecular imprinted composite material and great environmental pollution in existing methods, and to provide a carbon quantum dot-molecular Preparation method of imprinted composite material and method for analyzing residues of pesticide mesotrione by using it

Method used

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  • A preparation method of carbon quantum dot-molecularly imprinted composite material and a method for analyzing the residue of pesticide mesotrione by using it
  • A preparation method of carbon quantum dot-molecularly imprinted composite material and a method for analyzing the residue of pesticide mesotrione by using it
  • A preparation method of carbon quantum dot-molecularly imprinted composite material and a method for analyzing the residue of pesticide mesotrione by using it

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specific Embodiment approach 1

[0024] Specific Embodiment 1: This embodiment is a method for preparing a carbon quantum dot-molecularly imprinted composite material, which is specifically completed according to the following steps:

[0025]1. Preparation of carbon quantum dots: first put the mango peel into the polytetrafluoroethylene lining, add high-purity water and mix evenly, cover it and put it into a stainless steel reaction kettle, seal the reaction kettle, and then put it in a blast drying box. React at a temperature of 180°C to 220°C for 3h to 7h, and after cooling to room temperature, the reaction product is obtained, and the reaction product is filtered through a microporous filter membrane with a pore size of 20 μm to 40 μm to obtain a light yellow filtrate, the light yellow Filtrate is carbon quantum dot solution; The quality of mango peel described in step 1 and the volume ratio of high-purity water are 1g:(10~20)mL;

[0026] 2. Modified carbon quantum dots: add 3-aminopropyltriethoxysilane to...

specific Embodiment approach 2

[0028] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the reaction is carried out at a temperature of 200° C. for 3 hours. Others are the same as the first embodiment.

specific Embodiment approach 3

[0029] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the quality of the mango peel described in step one and the volume ratio of high-purity water are 1g:15mL. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of a carbon quantum dot-molecularly imprinted composite material and a method using carbon quantum dot-molecularly imprinted composite material to analyzeresidues of mesotrione pesticide, and relates to a preparation method of a carbon quantum dot-molecularly imprinted composite material and a method for analyzing mesotrione pesticide. The preparationmethod and the analyzing method aim at solving the problems of long mesotrione analyzing time and low selectivity in the prior art and high cost and large pollution to environment in the synthezing method of the quantum dot molecularly imprinted composite material. The preparation method comprises the following steps of 1, preparing carbon quantum dots; 2, modifying the carbon quantum dots; 3, imprinting molecules, so as to obtain the carbon quantum dot-molecularly imprinted composite material. The analyzing method comprises the following steps of 1, preparing a dispersion liquid; 2, detectingfluorescent intensity of a contrast group; 3, determining quenching constant Ksv; 4, detecting a to-be-detected sample, and calculating the content Qu of the mesotrione in the to-be-detected sample.The analyzing method is mainly used for analyzing the residues of the mesotrione pesticide in an environment water sample.

Description

technical field [0001] The invention relates to a method for preparing a carbon quantum dot-molecularly imprinted composite material and an analysis method for the pesticide mesotrione. Background technique [0002] Carbon quantum dots refer to a material with fluorescent properties similar to semiconductor quantum dots, which is composed of C as the main component and combined with elements such as H, O, and N. Its particle size ranges from a few nanometers to tens of nanometers. It has low toxicity, good biocompatibility and photostability. At present, the main raw materials for preparing carbon quantum dots are graphene and carbon nanotubes. Most of these raw materials are relatively expensive, and the products need to undergo strong acid reflux treatment or surface modification to ensure the stable optical properties of carbon quantum dots, which limits the large-scale production and practical application of carbon quantum dots. Therefore, the development of biomass pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/65G01N21/64
CPCC09K11/025C09K11/65G01N21/643G01N2021/6432
Inventor 陈立钢孙雪牛娜
Owner NORTHEAST FORESTRY UNIVERSITY
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