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Flaky nano ZIF-8 material, and synthesis method and application thereof

A kind of ZIF-8, nanotechnology, applied in the field of synthesis of flake nano ZIF-8 materials, can solve the problems of poor fluorescence performance of ZIF-8 and unfavorable sensing applications, etc., and achieve friendly synthesis conditions, obvious effects, and high-sensitivity detection Effect

Inactive Publication Date: 2021-10-29
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: the technical problem to be solved by this invention is to provide a kind of flake nano ZIF-8 material and its preparation method and application

Method used

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  • Flaky nano ZIF-8 material, and synthesis method and application thereof
  • Flaky nano ZIF-8 material, and synthesis method and application thereof
  • Flaky nano ZIF-8 material, and synthesis method and application thereof

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specific Embodiment approach 1

[0032] Specific implementation mode 1: This implementation mode is a kind of flake nano ZIF-8 material which is ground into a transparent colloid by 2-methylimidazole and zinc acetate dihydrate, then adding 2-methylimidazole and alkali with a molar ratio of 1:1.5 The alkali of ~2.5 is ground again, and the material obtained by methanol centrifugation is used for post-processing, in which 2-methylimidazole is the organic ligand, zinc acetate dihydrate is the metal node, alkali is the auxiliary agent, and 10-15mL methanol is the solvent during centrifugation.

specific Embodiment approach 2

[0033] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: a kind of flaky nano ZIF-8 material is ground into a transparent colloid by 2-methylimidazole and zinc acetate dihydrate, and then added 2-methylimidazole The alkali with a molar ratio of 1:1.5 to 2.0 is ground again, and the material obtained by methanol centrifugation is used for post-processing, in which 2-methylimidazole is the organic ligand, zinc acetate dihydrate is the metal node, and the alkali is the auxiliary agent. 15mL of methanol was used as the solvent for centrifugation. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0034] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: a kind of flake nano ZIF-8 material is ground to transparent colloid by 2-methylimidazole and zinc acetate dihydrate, then add 2 -Methylimidazole and alkali with a molar ratio of 1:2.0 to 2.5 are ground again, and the post-treatment uses the material obtained by methanol centrifugation, in which 2-methylimidazole is the organic ligand, zinc acetate dihydrate is the metal node, and the alkali is the auxiliary 10-15mL methanol is used as the solvent for centrifugation. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a flaky nano ZIF-8 material, and a synthesis method and application thereof. The invention aims to solve the problem that the ZIF-8 material synthesized by the existing method is low in fluorescence intensity and is not beneficial to sensing application. The flaky nano ZIF-8 material is obtained by grinding 2-methylimidazole, zinc acetate dihydrate and alkali twice and then centrifuging with methanol. The preparation method comprises the following steps: (1) putting the zinc acetate dihydrate and the 2-methylimidazole into a mortar according to a molar ratio of 1: (1.5-2.5), and grinding for 5 minutes to obtain a transparent colloid; (2) adding alkali in a molar ratio of 1: (1.3-1.8), and continuously grinding for 0.5-2.5 hours to obtain white powder; and (3) adding 10-15 mL of methanol into the white powder, centrifuging for 5-20 minutes until the solution is transparent, and drying to obtain the ZIF-8 material. When the flaky nano ZIF-8 material prepared by the invention is used for sensing Cu<2+>, the detection limit is 0.117 mg / L and is far lower than 2.0 mg / L of Cu<2+> limited by WHO.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a synthesis method and application of a flaky nano ZIF-8 material. Background technique [0002] In recent years, combustion emissions from mine tailings, smelters, iron foundries, etc. 2+ origin of. In agricultural production, Cu(OH) 2 , CuO, Cu 2 (OH) 3 Cl, C 4 h 4 o 4 Cu, etc. are frequently and widely used as fungicides, fungicides, insecticides, etc., causing Cu 2+ Accumulated in soil, excess Cu 2+ Inhalation of plants can induce changes in plant photosynthesis, respiration, enzyme activity, DNA and membrane integrity, resulting in the loss of its original structure and function. More importantly, excess Cu 2+ Often cause the growth retardation or stop of many kinds of plants, even die. For the human body, Cu 2+ It is an important part of various oxidases in the human body. When Cu 2+ When the concentration reaches a high level, it can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C09K11/06G01N21/64
CPCC08G83/008G01N21/6428C09K11/06G01N2021/6439C09K2211/188
Inventor 杜海英吕欣杨青张佩聪
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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