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Method for synthesizing carbon dots and detecting copper ions in water body

A synthesis method and technology of carbon dots, applied in measuring devices, material analysis by observing the influence on chemical indicators, instruments, etc., can solve problems such as cumbersome operation, time-consuming and labor-consuming, and complex design

Pending Publication Date: 2021-09-14
NINGDE NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are many methods for the determination of heavy metal ions. The traditional methods include ion selective electrode method and ion chromatography, etc., but the operation is cumbersome, the design is complicated, and it is time-consuming and labor-intensive.

Method used

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  • Method for synthesizing carbon dots and detecting copper ions in water body
  • Method for synthesizing carbon dots and detecting copper ions in water body
  • Method for synthesizing carbon dots and detecting copper ions in water body

Examples

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Effect test

Embodiment 1

[0037] Embodiment 1: the synthesis of a kind of carbon dot and copper ion detection method in water body, such as figure 1 shown, including the following steps:

[0038]S1. Selection and pretreatment of raw materials for synthesis. Collected fresh tea leaves are used as raw materials for synthesis. Impurities on the surface of the fresh tea leaves are discarded, and the fresh tea leaves are air-dried in a natural environment. Obtain tea powder, and put the tea powder into a desiccator to preserve for later use;

[0039] S2, the synthesis of carbon dots, take tea powder 0.3g and 3.7mL distilled water and put into the hydrothermal reaction kettle with polytetrafluoroethylene lining, tighten the lid of hydrothermal reaction kettle, and place it in the oven and heat to Carry out the synthesis reaction at 200°C. After the synthesis reaction in the hydrothermal reactor for 2 hours, take out the hydrothermal reactor and cool it to room temperature, then put the hydrothermal reactor ...

Embodiment 2

[0045] Embodiment 2,: the copper ion detection method in the water body based on the synthetic method of a kind of carbon point, such as figure 2 As shown, it specifically includes the following steps:

[0046] A. Take the fluorescent carbon dot stock solution and dilute it to obtain the diluted fluorescent carbon dot stock solution, then take 1mL of the diluted fluorescent carbon dot stock solution and Cu-containing 2+ Place 1mL of the solution to be tested in a 10mL colorimetric tube, then use NaAc-HAc buffer solution to dilute the solution in the colorimetric tube to 5mL, and react the solution in the colorimetric tube at room temperature;

[0047] B. After the solution in the colorimetric tube reacts at room temperature, use a vortex mixer to mix the solution in the colorimetric tube evenly, and measure the fluorescence intensity of the solution in the colorimetric tube;

[0048] C, according to the measurement of the fluorescence intensity of solution in the colorimetri...

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Abstract

The invention discloses a method for synthesizing carbon dots and detecting copper ions in a water body, and relates to the technical field of carbon dot synthesis, and the method is technically characterized by comprising the following steps: synthesizing fluorescent carbon dots by taking tea as a raw material and adopting a hydrothermal method, and optimizing synthesis conditions; with the synthesized fluorescent carbon dots as probes and by means of the fluorescence of the carbon dots, detecting copper ions in the water body, opetimizing the conditions for detecting the copper ions, and detecting the Cu<2+> in the water body by virtue of a linear relationship between the fluorescence intensity of the fluorescent carbon dots and the Cu<2+> concentration. According to the preparation method, the tea is taken as a raw material, the fluorescent carbon dots are synthesized by adopting a hydrothermal method, and synthesis conditions are optimized, so that the preparation operation of the carbon dots is simple, the preparation efficiency is high, and meanwhile, the synthesized carbon dots are good in fluorescence property, photobleaching resistance and salt resistance; and besides, the synthesized fluorescent carbon dots are used for detecting Cu<2+> in a water body, Cu<2+> in the water body is detected by utilizing a fluorescence spectrophotometric method, the detection sensitivity is high, the selectivity is good, and simple and rapid detection of heavy metal ions in an environmental water sample can be realized.

Description

technical field [0001] The invention relates to the technical field of carbon dot synthesis, in particular to a method for synthesizing carbon dots and detecting copper ions in water. Background technique [0002] In recent years, a new nanomaterial - fluorescent carbon dots has attracted people's attention. Carbon dots have similar fluorescent properties to quantum dots. In addition, compared with other fluorescent nanoparticles such as quantum dots, carbon dots have the advantages of stable fluorescence, adjustable excitation and emission wavelengths, good biocompatibility, low toxicity, and small molecular weight and particle size. Through the unremitting efforts of researchers, the preparation method of carbon dots has made great progress. The preparation method has changed from the initial multi-step operation to one-step synthesis, and the fluorescence quantum yield has been as high as 60% from less than 1% at the beginning. [0003] At present, the preparation method...

Claims

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Application Information

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IPC IPC(8): G01N21/64G01N21/78G01N21/01
CPCG01N21/6428G01N21/78G01N21/01G01N2021/6432G01N2021/6439G01N2021/0112
Inventor 李萍
Owner NINGDE NORMAL UNIV
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