A method of preparing fluorescent carbon dots by adopting waste sugarcane molasses as a raw material and application of the fluorescent carbon dots

A technology of fluorescent carbon dots and waste molasses, which is applied in the fields of biomedicine, food testing, and biological materials, can solve problems such as affecting the development of children's liver and kidneys, low IQ in children, and interfere with metabolism in the body, and achieves low cost, low price, and preparation. The effect of simple process technology

Active Publication Date: 2017-05-10
GUANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, excessive intake of sunset yellow by the human body may cause low IQ in children, affect the deve

Method used

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  • A method of preparing fluorescent carbon dots by adopting waste sugarcane molasses as a raw material and application of the fluorescent carbon dots
  • A method of preparing fluorescent carbon dots by adopting waste sugarcane molasses as a raw material and application of the fluorescent carbon dots
  • A method of preparing fluorescent carbon dots by adopting waste sugarcane molasses as a raw material and application of the fluorescent carbon dots

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Effect test

Embodiment 1

[0061] A preparation method for synthesizing fluorescent carbon dots using sugarcane waste molasses as a raw material comprises the following steps:

[0062] (1) Weighing 4.0 g of sugarcane molasses, putting it into a polytetrafluoroethylene-lined reactor, reacting at 240°C for 13 h, cooling to room temperature, and obtaining sugarcane molasses after pyrolysis;

[0063] (2) Add 4 mL of deionized water to the high-temperature cracked sugarcane molasses, and ultrasonicate at 80 Hz for 4 minutes to obtain a sugarcane molasses solution; the sugarcane molasses is the residue left after crystallization and separation of white sugar in the sugarcane sucrose production process black viscous liquid;

[0064] (3) Pass the sugarcane waste molasses solution through a 0.22 μm water phase filter membrane, filter it repeatedly three times, and collect the golden yellow filtrate;

[0065] (4) Drop the golden yellow filtrate solution into 200 mL of absolute ethanol for precipitation, and prec...

Embodiment 2

[0067] A preparation method for synthesizing fluorescent carbon dots using sugarcane waste molasses as a raw material comprises the following steps:

[0068] (1) Weighing 5.0 g of sugarcane molasses, putting it into a polytetrafluoroethylene-lined reactor, reacting at 250°C for 12 hours, and cooling to room temperature to obtain high-temperature cracked sugarcane molasses;

[0069] (2) Add 5 mL of deionized water to the high-temperature cracked sugarcane molasses, and ultrasonicate at 100 Hz for 3 minutes to obtain a sugarcane molasses solution; black viscous liquid;

[0070] (3) Pass the sugarcane waste molasses solution through a 0.22 μm water phase filter membrane, filter it repeatedly three times, and collect the golden yellow filtrate;

[0071] (4) Drop the golden yellow filtrate solution into 200 mL of absolute ethanol for precipitation, and precipitate a brown solid, centrifuge at a speed of 6000 round / min for 5 minutes, collect the clear solution, remove absolute etha...

Embodiment 3

[0073] A preparation method for synthesizing fluorescent carbon dots using sugarcane waste molasses as a raw material comprises the following steps:

[0074] (1) Weighing 6.0 g of sugarcane molasses, putting it into a polytetrafluoroethylene-lined reactor, reacting at 260°C for 11 hours, cooling to room temperature, and obtaining high-temperature cracked sugarcane molasses;

[0075] (2) Add 6 mL of deionized water to the sugarcane waste molasses after pyrolysis, and ultrasonicate at 120 Hz for 2 minutes to obtain a sugarcane waste molasses solution; the sugarcane waste molasses is the remaining after crystallization and separation of white sugar in the sugarcane sucrose production process waste molasses;

[0076] (3) Pass the sugarcane waste molasses solution through a 0.22 μm water phase filter membrane, filter it repeatedly three times, and collect the golden yellow filtrate;

[0077] (4) Drop the golden yellow filtrate solution into 200 mL of absolute ethanol for precipita...

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Abstract

A method of preparing fluorescent carbon dots by adopting waste sugarcane molasses as a raw material and application of the fluorescent carbon dots are disclosed. The method includes weighing 4.0-6.0 g of the waste sugarcane molasses, performing pyrolysis at 240-260 DGE C, adding 4-6 mL of deionized water, filtering the mixture with a filter membrane having a pore size of 0.22 [mu]m, adding dropwise the filtrate into absolute ethanol, performing centrifugation for 5 min at a rotating speed of 6000 round/min, collecting a clear liquid, performing vacuum concentrating to remove the ethanol, adding the deionized water again, filtering the mixture with the filter membrane having a pore size of 0.22 [mu]m, collecting a filtrate, and freeze-drying the filtrate to obtain the fluorescent carbon dots. A preparing process of the fluorescent carbon dots is simple and raw materials are cheap. The fluorescent carbon dots have characteristics of good biocompatibility, good bleaching resistance performance, high optical stability, excellent fluorescent properties, and the like, and can be used for cell imaging and used for content detection of a food coloring agent that is sunset yellow.

Description

technical field [0001] The invention relates to the preparation and application of a fluorescent carbon nanomaterial-carbon dots, that is, using sugarcane waste molasses as a raw material, preparing fluorescent carbon dots through high-temperature cracking, and systematically studying the application of the carbon dots in cell imaging and sunset yellow content detection , belonging to the field of biomaterials, biomedicine and food testing. Background technique [0002] Molasses is a dark, viscous liquid that is a by-product of the production of raw and refined sugar. Its main components are fermentable sugar and non-fermentable sugar, with a sugar content of about 45-50%. Because molasses has a high sugar content, it often plays an important role in the fields of agricultural and sideline product processing, food, construction, energy, chemical industry and light industry. In the field of agricultural and sideline products, molasses can be used as an auxiliary material an...

Claims

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Application Information

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IPC IPC(8): C09K11/65G01N21/64G01N23/223B82Y40/00C01B32/15C12Q1/04C12Q1/02
CPCB82Y40/00C01P2002/84C01P2004/04C01P2004/64C09K11/65C12Q1/04G01N21/6428G01N23/223G01N33/5035G01N2021/6432G01N2223/076
Inventor 黄岗陈东廖思明陆琦
Owner GUANGXI ACAD OF SCI
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