Preparation of superfine mixed valence Ce-MOF nanowire and application in electrochemical luminescence sensing

A hybrid valence, nanowire technology, applied in chemiluminescence/bioluminescence, electrochemical variables of materials, analysis by chemical reaction of materials, etc., can solve the problems of poor stability, low conductivity, and excessive particle size of MOFs problem, to achieve the effect of reliable design and simple design

Active Publication Date: 2021-11-23
ANALYSIS & TESTING CENT CHINESE ACADEMY OF TROPICAL AGRI SCI
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that, aiming at the problems of excessive particle size, poor stability in water and low ...

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  • Preparation of superfine mixed valence Ce-MOF nanowire and application in electrochemical luminescence sensing
  • Preparation of superfine mixed valence Ce-MOF nanowire and application in electrochemical luminescence sensing
  • Preparation of superfine mixed valence Ce-MOF nanowire and application in electrochemical luminescence sensing

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] The invention provides a method for preparing ultrafine mixed valence Ce-MOF nanowires: using cationic CTAB (cetyltrimethylammonium bromide) and SDS (sodium dodecyl sulfate) surfactants to form positive Negative ion micellar system, which generates stable single crystal ultrafine Ce-MOF nanowire colloidal solution in water.

[0033] In this example, the specific steps of preparation include: mixing 40 mg of NaOH (sodium hydroxide) and 70 mg of H 3 Dissolv...

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Abstract

The invention discloses preparation of a superfine mixed valence Ce-MOF nanowire and application in electrochemical luminescence sensing. The preparation of the superfine mixed valence Ce-MOF nanowire comprises the following steps of: mixing cation CTAB and an SDS surfactant to form a cation and anion micelle system, and generating a stable monocrystal superfine Ce-MOF nanowire colloidal solution in water. The size of the prepared Ce-MOF mixed valence state nanowire is about 50 nm, the nanowire has good water stability and conductivity, on the basis, the nanowire is introduced into a luminol hydrogen peroxide luminescence system, a novel two-channel self-circulation ECL catalytic amplification mechanism is provided, and finally, a molecular imprinting technology is combined, so that an ECL sensor based on the superfine mixed valence Ce-MOF is developed, the ECL sensor is used for detecting trace imidacloprid in plant-derived food, the linear range of the sensor is 2-120 nM, and the detection limit is 0.34 nM.

Description

technical field [0001] The invention relates to the field of preparation and application of nanomaterials, in particular to the preparation of an ultrafine mixed-valence Ce-MOF nanowire and its application in electrochemiluminescence sensing. Background technique [0002] Neonicotinoid insecticides are currently the most widely used botanical insecticides due to their high efficiency and broad spectrum. They block the normal conduction of the central nervous system by controlling the nicotinic acetylcholinesterase receptors, thereby causing pests paralysis and death. However, studies have shown that neonicotinoids not only have great potential harm to bees, but also have negative effects on human health, among which imidacloprid (IMI) is a typical representative of neonicotinoid insecticides. Due to long-term and widespread use, IMI residues have become ubiquitous pesticide contaminants in agricultural products. Therefore, reliable quantitative analysis of IMI in samples of...

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Application Information

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IPC IPC(8): G01N21/76G01N27/26G01N27/30B82Y40/00B22F9/24B22F1/00
CPCG01N21/76G01N27/26G01N27/308B22F9/24B82Y40/00
Inventor 马雄辉黎舒怀庞朝海
Owner ANALYSIS & TESTING CENT CHINESE ACADEMY OF TROPICAL AGRI SCI
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