Novel carbon material based on coffee beans and method for detecting lead ions and PPi

A technology of coffee beans and carbon materials, applied in the directions of luminescent materials, material excitation analysis, chemical instruments and methods, etc., can solve the problem of high equipment cost, and achieve the effects of high sensitivity, good selectivity and low cost

Pending Publication Date: 2022-04-15
GUANGDONG PHARMA UNIV +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of novel carbon material based on coffee beans and detect Pb 2+ , PPi method, specifically based on the fluorescence "on-off" effect to detect Pb 2+ and PPi method, using coffee beans as raw materials, carbon quantum dots synthesized by one-step hydrothermal method as fluorescent probes, which can detect Pb with high sensitivity through fluorescence quenching effect 2+ , and then detect PPi through the fluorescence recovery phenomenon, which has the advantages of green and simple synthesis method, fast and convenient detection, and accurate results, and overcomes the problems of high equipment cost and complicated operation of traditional lead ion and pyrophosphate detection methods

Method used

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  • Novel carbon material based on coffee beans and method for detecting lead ions and PPi
  • Novel carbon material based on coffee beans and method for detecting lead ions and PPi
  • Novel carbon material based on coffee beans and method for detecting lead ions and PPi

Examples

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Effect test

Embodiment 1

[0061] 1) Dissolve 3g of coffee bean powder in 30mL of pure water, and then add 7.2g (6mM) of sodium hydroxide to obtain mixed solution A;

[0062] 2) Transfer solution A to a polytetrafluoroethylene lining, then put it into a stainless steel reactor and react at 200°C for 480 minutes to obtain solution B;

[0063] 3) Transfer solution B to a 12000D dialysis bag, and dialyze for 48 hours to obtain solution C;

[0064] 4) Suction filter solution C with a 0.22 μm organic filter, then freeze at -60°C for 4 hours, and vacuum-dry for 12 hours to obtain brown-black powder CQDs, which are stored at 2-8°C for future use.

Embodiment 2

[0066] Different from embodiment 1, add 2g of coffee bean powder, all the other are the same.

Embodiment 3

[0068] The preparation method of carbon quantum dots is with reference to example 1, changes the amount of sodium hydroxide, and concrete steps are as follows:

[0069] Different from Example 1, add sodium hydroxide 12g, all the other are the same.

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Abstract

The invention discloses a novel carbon material based on coffee beans and a method for detecting lead ions and PPi, and belongs to the field of nanoscale carbon material technology and fluorescence detection application thereof. Comprising the following steps: (1) dissolving coffee bean powder and sodium hydroxide in water to obtain a solution A; (2) performing hydrothermal reaction on the solution A at high temperature to obtain a solution B; (3) dialyzing the solution B to obtain a solution C; and (4) filtering and drying the solution C to obtain the CQDs. The carbon quantum dots synthesized through a one-step hydrothermal method serve as the fluorescent probe, the fluorescent probe can detect Pb < 2 + > with high sensitivity through the fluorescence quenching effect, then PPi is detected through the fluorescence recovery phenomenon, and the carbon quantum dots have the advantages of being green and simple in synthesis method, rapid and convenient to detect and accurate in result and have high application value in the field of biomedicine.

Description

technical field [0001] The invention belongs to the field of nano-scale carbon material technology and its application of fluorescence detection, in particular to a novel carbon material based on coffee beans and a method for detecting lead ions and PPi. Background technique [0002] Heavy metal pollution has seriously threatened the environment and human health. How to effectively monitor the concentration of toxic heavy metal ions in the environment has become an increasingly important issue. Lead is one of the most common toxic heavy metals, widely used in pigments, water pipes, batteries, anti-corrosion coatings, alloys and other fields, and widely exists in various fields of the environment. At the same time, due to Pb 2+ non-biodegradability, when exposed to polluted air and water sources, Pb 2+ It readily accumulates in the nervous and cardiovascular systems of humans. When Pb in blood 2+ When the concentration is higher than 5μM, it can cause anemia, reproductive...

Claims

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Application Information

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IPC IPC(8): C09K11/65B82Y20/00B82Y40/00C01B32/15G01N21/64
Inventor 刘意严志红姚微冯冰洁何晓婷汪子琨
Owner GUANGDONG PHARMA UNIV
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