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Preparation and application of a dual fluorescent carbon nanodot

A technology of carbon nano-dots and dual fluorescence, applied in nano-carbon, nano-technology, nano-optics, etc., can solve the problems of complex preparation of ratiometric fluorescent probes, poor water solubility, etc., achieve non-toxic side effects, improved sensitivity, and cheap and easy-to-obtain raw materials Effect

Active Publication Date: 2016-01-20
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to aim at existing Al 3+ To address the problems of complex preparation of ratiometric fluorescent probes and poor water solubility, a method for preparing dual fluorescent carbon nanodots is provided, and the dual fluorescent carbon nanodots prepared by this method are used as Al 3+ Applications of Ratiometric Fluorescent Probes

Method used

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  • Preparation and application of a dual fluorescent carbon nanodot
  • Preparation and application of a dual fluorescent carbon nanodot
  • Preparation and application of a dual fluorescent carbon nanodot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of dual fluorescent carbon nanodots:

[0031] (1) Carbonize naked oats at 400°C for 2 hours;

[0032] (2) Grinding the carbonized product into powder;

[0033] (3) Mix 1 g of naked oat carbonized powder prepared in step (2) with 80 mL of water, and heat in microwave for 12 minutes to obtain a black turbid liquid;

[0034] (4) Centrifuge the black turbid liquid with a centrifuge at 3500r / min for 15-20min to remove the black precipitate and obtain a transparent supernatant;

[0035] (5) Freeze-dry the transparent supernatant at -50°C until it becomes powdery to obtain carbon nanodots.

[0036] The transmission electron microscope image of the prepared dual fluorescent carbon nanodots is shown in figure 1 .

[0037] The pictures of the prepared double fluorescent carbon nanodot aqueous solution under the irradiation of fluorescent lamp and ultraviolet lamp (wavelength of 254nm and 365nm) are shown in figure 2 , wherein 1 is the picture of the aqueous solu...

Embodiment 2

[0040] Preparation of dual fluorescent carbon nanodots:

[0041] (1) Carbonize naked oats at 300°C for 3 hours;

[0042] (2) Grinding the carbonized product into powder;

[0043] (3) Mix 1 g of naked oat carbonized powder prepared in step (2) with 90 mL of water, and heat in microwave for 8 minutes to obtain a black turbid liquid;

[0044] (4) Centrifuge the black turbid liquid with a centrifuge at 3500r / min for 15-20min to remove the black precipitate and obtain a transparent supernatant;

[0045] (5) Freeze-dry the transparent supernatant at -50°C until it becomes powdery to obtain carbon nanodots.

Embodiment 3

[0047] Preparation of dual fluorescent carbon nanodots:

[0048] (1) Carbonize naked oats at 200°C for 4 hours;

[0049] (2) Grinding the carbonized product into powder;

[0050] (3) Mix 1 g of naked oat carbonized powder prepared in step (2) with 100 mL of water, and heat in microwave for 16 minutes to obtain a black turbid liquid;

[0051] (4) Centrifuge the black turbid liquid with a centrifuge at 3500r / min for 15-20min to remove the black precipitate and obtain a transparent supernatant;

[0052] (5) Freeze-dry the transparent supernatant at -50°C until it becomes powdery to obtain carbon nanodots.

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Abstract

In allusion to preparation complexity and poor water solubility of an Al<3+> ratiometric fluorescent probe in the prior art, the invention provides a preparation method of bifluorescent carbon nanodots and an application of the prepared bifluorescent carbon nanodots used as an Al<3+> ratiometric fluorescent probe. According to the invention, a green product Avena nuda is used as a raw material to prepare the bifluorescent (347nm and 428nm) carbon nanodots with good resolution by a microwave method. The preparation method is simple and has low cost. The prepared bifluorescent carbon nanodots which are used as the Al<3+> ratiometric fluorescent probe have characteristics of good selectivity and high sensitivity, and can be used to rapidly detect the concentration of Al<3+> in an aqueous solution containing Al<3+>.

Description

technical field [0001] The present invention relates to the preparation and application of nanomaterials, in particular to a method for preparing double-fluorescent carbon nano-dots, and the prepared double-fluorescent carbon nano-dots as Al 3+ Application of ratiometric fluorescent probes. Background technique [0002] As a new type of fluorescent carbon nanomaterials, carbon nanodots have attracted extensive attention from researchers. Compared with traditional semiconductor quantum dots, it has many advantages such as good water solubility, high chemical stability, easy functionalization, photobleaching resistance, non-toxicity, and good biocompatibility, so it has broad applications in the fields of biolabeling and fluorescence imaging. Application prospect. [0003] The preparation methods of carbon nanodots are various, which can be roughly divided into laser exfoliation graphite method, electrochemical oxidation method, arc discharge method, microwave synthesis meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02C09K11/65G01N21/64B82Y40/00B82Y20/00C01B32/15
Inventor 石利红李晓峰赵俊秀双少敏
Owner SHANXI UNIV