Layered double-metal hydroxide composite material , preparation method and application thereof

A layered bimetallic and hydroxide technology, applied in the field of chemical detection, can solve the problems of difficult combination of rare earth elements, limited practical application, insufficient fluorescence performance, etc., achieve good detection limit, high convenience and safety, and expand application range effect

Pending Publication Date: 2021-10-19
SOUTH CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Related technologies combine LDH with rare earth elements to prepare fluorescent probes, but there are defects such as di

Method used

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  • Layered double-metal hydroxide composite material , preparation method and application thereof
  • Layered double-metal hydroxide composite material , preparation method and application thereof
  • Layered double-metal hydroxide composite material , preparation method and application thereof

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Embodiment 1

[0057] This embodiment provides a magnesium-aluminum layered double metal hydroxide composite material, and its synthetic route is as follows figure 1 As shown, the specific preparation method comprises the following steps:

[0058] (1) 0.006mol Mg(NO 3 ) 2 ·6H 2 O and 0.003mol Al(NO 3 ) 3 9H 2 O(Mg 2+ / Al 3+ molar ratio of 2.0) was dissolved in ultrapure water (50 mL) to prepare solution A.

[0059] (2) Weigh 0.01 mol of NaOH and dissolve it in ultrapure water to form dilute solution B (the amount of ultrapure water used is 30 ml).

[0060] (3) Add 0.15g, 0.375g, 0.75g or 1.5g of fulvic acid (FA) into a three-necked flask pre-filled with 0.1M NaOH (50mL), and stir for 30min to obtain a sodium fulvic acid solution.

[0061] (4) Under the condition of magnetic stirring (rotating speed is 900r / min), solution A, B are slowly dripped into (the speed of dropping is 15 drops / min) in the step (3) that sodium fulvic acid solution is housed in three In the flask, a dark brow...

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Abstract

The invention discloses a layered double-metal hydroxide composite material, a preparation method and application thereof. The layered double-metal hydroxide composite material comprises a layered double-metal hydroxide and rare earth metal cations, wherein the surface of the layered double-metal hydroxide is modified with a carboxyl-containing organic ligand, the rare earth metal cations are coordinated with the carboxyl-containing organic ligand, the molecular weight of the carboxylic acid-containing organic ligand is greater than 1000, and the hydrodynamic radius of the carboxylic acid-containing organic ligand is greater than the interlayer distance of the layered double-metal hydroxide. According to the invention, the layered double-metal hydroxide is used as an inorganic matrix, the specific carboxyl-containing organic ligand and the layered double-metal hydroxide are integrated into a whole through assembly, and the novel rare earth organic-inorganic hybrid material is obtained by utilizing the advantage of good coordination binding property of the carboxyl-containing organic ligand and rare earth metal cations, so that the stability is enhanced, and the application range of fluorescence analysis is expanded, and the detection limit is good.

Description

technical field [0001] The invention relates to the technical field of chemical detection, in particular to a layered double metal hydroxide composite material and a preparation method and application thereof. Background technique [0002] Since the discovery of penicillin as the first antibiotic in 1928, various antibiotics that can inhibit or kill bacteria have been widely used to treat bacterial infections in humans and animals. In addition, some antibiotics such as trichosanthin, nitrofurans and sulfonamides are also used as feed additives to promote animal growth. However, the indiscriminate use of antibiotics in animal husbandry has led to problems such as toxic effects, antibiotic residues in animal products, and bacterial resistance, which pose serious threats to public health through the food chain. [0003] Doxycycline (DOC) belongs to tetracycline antibiotics, which has the same carbon core structure as tetracycline, and has a wide range of antibacterial activiti...

Claims

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Application Information

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IPC IPC(8): C09K11/06G01N21/64
CPCC09K11/06G01N21/64G01N21/643C09K2211/182G01N2021/6417G01N2021/6439
Inventor 王前明余丽郑玉惠
Owner SOUTH CHINA NORMAL UNIVERSITY
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