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Carbon quantum dots prepared from pyrolysis molecular sieves and application of carbon quantum dots in detection of hydrogen peroxide

A technology for hydrogen peroxide detection and carbon quantum dots, which is used in material analysis by optical means, chemical instruments and methods, nano-carbon, etc., can solve the problems of difficulty in tracking, low concentration of hydrogen peroxide, etc. The effect of good solubility

Inactive Publication Date: 2019-04-12
JILIN UNIV
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Problems solved by technology

However, the concentration of hydrogen peroxide in biological fluids is usually low and difficult to track

Method used

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  • Carbon quantum dots prepared from pyrolysis molecular sieves and application of carbon quantum dots in detection of hydrogen peroxide
  • Carbon quantum dots prepared from pyrolysis molecular sieves and application of carbon quantum dots in detection of hydrogen peroxide
  • Carbon quantum dots prepared from pyrolysis molecular sieves and application of carbon quantum dots in detection of hydrogen peroxide

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Embodiment 1

[0025] With the help of hydrothermal synthesis and post-treatment separation of molecular sieves with CHA-type topology, a carbon quantum dot with ultraviolet light excitation and fluorescence response to hydrogen peroxide solution was synthesized.

[0026] Dissolve 0.332g of pseudoboehmite in 14mL of water, continue to add 0.438g of magnesium acetate, 0.6mL of phosphoric acid (mass fraction 85%) and 1.2mL of nitrogen methyl piperidine under magnetic stirring, and continue stirring for 1 hour to obtain a gel . Transfer the gel into a polytetrafluoroethylene-lined stainless steel reaction kettle, place the reaction kettle in an oven at 180°C, and heat it for 3 days under the pressure naturally generated by the reaction kettle. After the crystallization is complete, take out the reaction kettle and let it cool naturally , the product is washed and dried to obtain the MgAPO molecular sieve;

[0027]After carefully grinding the prepared molecular sieve, the mesh number after grin...

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Abstract

The invention provides carbon quantum dots prepared from pyrolysis molecular sieves and application of the carbon quantum dots in detection of hydrogen peroxide, and belongs to the technical field ofcarbon-based nanomaterials. With the aid of the spatial confinement effect of the molecular sieves, the carbon quantum dot materials with ultraviolet light excitation, small size, size uniformity (about 2.5 nm), good stability and photoluminescence properties are obtained through hydrothermal synthesis and aftertreatment, and the carbon quantum dot materials can be applied as a fluorescent probe to detect hydrogen peroxide. The main preparation process includes the following steps that an aluminum source, a magnesium source, phosphoric acid and an organic templating agent are used as raw materials, molecular sieve crystal products are prepared through hydrothermal synthesis, and water-soluble carbon dot products are obtained through pyrolysis, chromatography and the like. The prepared carbon dots show excitation-independent blue fluorescence (the emission peak is about 420 nm) and can achieve high sensitivity response to hydrogen peroxide. The quenching constants and detection limits of the carbon dots are 7.3 x 10(3)M(-1) and 3.16 microM respectively.

Description

technical field [0001] The invention belongs to the technical field of carbon-based nanomaterials, and specifically relates to a carbon quantum with ultraviolet light excitation obtained through hydrothermal synthesis of molecular sieves, calcination pyrolysis, etching treatment, and thin-layer chromatography separation using the space confinement effect of molecular sieves. Dot materials and their application as fluorescent probes for hydrogen peroxide detection. Background technique [0002] In recent years, hydrogen peroxide, as an important pathological mediator of cancer, Alzheimer's disease, atherosclerosis, Parkinson's disease, myocardial infarction, diabetes and other neurodegenerative diseases, has received more and more attention in the fields of biochemistry and environment. focus on. But concentrations of hydrogen peroxide in biological fluids are often low and difficult to track. Therefore, it is of great significance to establish an efficient, simple, sensiti...

Claims

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Application Information

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IPC IPC(8): C01B32/15C09K11/65G01N30/90G01N21/64B82Y20/00
CPCG01N21/6428G01N30/90B82Y20/00C01B32/15G01N2021/6432
Inventor 李激扬王博伦沐影
Owner JILIN UNIV
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