Preparation method of carbon quantum dots for detecting Fe<3+> in lake water

A carbon quantum dot and lake water technology, applied in the field of carbon quantum dot preparation, can solve the problems of unfriendly environment, time-consuming preparation process, high price, etc., and achieve the effects of good analytical performance, good photostability and good dispersibility.

Inactive Publication Date: 2014-01-01
ZHEJIANG NORMAL UNIVERSITY
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Problems solved by technology

However, the above preparation methods are not only expensive in raw materials (such as carbon nanotubes), the preparation process is time-consuming, and the chemical composition of the carbon source is complex (such as organisms, candle ash), but also need to use some environmentally friendly materials during the surface modification process. friendly strong corrosive substances
Therefore, it is difficult to achieve standardization of ingredients, which is not conducive to industrialization and large-scale production

Method used

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  • Preparation method of carbon quantum dots for detecting Fe&lt;3+&gt; in lake water
  • Preparation method of carbon quantum dots for detecting Fe&lt;3+&gt; in lake water
  • Preparation method of carbon quantum dots for detecting Fe&lt;3+&gt; in lake water

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Embodiment Construction

[0019] The first step: preparation of CDs quantum dots

[0020] Preparation method of CDs quantum dots:

[0021] Weigh 24g of chopped potatoes and divide them into three equal portions, add them to 50mL reaction kettles numbered 1, 2, and 3, add 35mL of redistilled water twice, and react at 180°C for 2 hours. Cool down after finishing, then filter through a filter membrane with a pore size of 0.22 microns, and then dialyze the filtrate with a dialysis bag with a molecular cut-off of 1000 for 12 hours, freeze-dry to obtain carbon quantum dots (CDs), and store them in the refrigerator for later use. like figure 1 As shown, the maximum excitation wavelength of CDs quantum dots is 323nm, corresponding to figure 2 As shown, there is an obvious exciton absorption peak at 272nm.

[0022] Step 2: CDs in Fe 3+ Applications in testing

[0023] CDs detect Fe 3+ performance analysis of

[0024] Take a clean and dry 100mL Erlenmeyer flask, add 100mL double-distilled water, then add...

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Abstract

The invention discloses a preparation method of carbon quantum dots for detecting Fe<3+> in lake water. The method comprises the following steps: cutting up potatoes and putting into a reaction kettle, and mixing with secondary redistilled water to react for 2 hours at 180 DEG C; filtering by a filter membrane of which the aperture is 0.22 microns after cooling; dialyzing filtrate for 12 hours by a dialysis bag of which the molecular weight cutoff is 1000; and carrying out freeze drying to obtain the carbon quantum dots. The preparation method is sufficient in raw materials, and low in cost; the entire preparation process is relatively environment-friendly.

Description

technical field [0001] The invention relates to a method for preparing carbon quantum dots, in particular to a method for detecting Fe in lake water. 3+ Preparation method of carbon quantum dots. Background technique [0002] Traditional semiconductor quantum dots (such as CdTe, CdSe) have strong toxicity due to their heavy metal ions, harsh preparation conditions (strict control of anaerobic conditions), and poor biocompatibility, making traditional semiconductor quantum dots in Applications in the fields of bioassays and cell imaging have been limited. Carbon quantum dots (Carbon dots, CDs), as a new member of the carbon nanomaterial family, have good water solubility, biocompatibility, bleaching resistance, low toxicity, and chemical stability compared with traditional semiconductor quantum dots. With high advantages, it has undoubtedly become an ideal substitute material for the application of traditional semiconductor quantum dots in the biological field, so it has at...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00G01N21/64C01B32/15
Inventor 黄朝表徐静怡周莹刘淑贤董美婷
Owner ZHEJIANG NORMAL UNIVERSITY
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