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Petroleum based carbon quantum dot, and preparation method and applications thereof

A quantum dot and petroleum-based technology, which is applied in the field of petroleum-based carbon quantum dots and its preparation, can solve the problems of inability to effectively improve the fluorescence quantum yield, limitation, and low quantum yield of carbon quantum dots, and achieve high quantum yield and high quantum yield. The effect of uniform distribution and simple preparation method

Active Publication Date: 2019-06-07
中海储能科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Current methods for preparing fluorescent carbon quantum dots using petroleum-based methods include laser etching, hydrothermal methods, electrochemical methods, microwave methods, etc., but these methods are subject to various limitations in the implementation process, including quality, yield and efficiency.
Although the Chinese patent CN104743545A studies the preparation method of petroleum coke-based carbon quantum dots, its quantum yield is very low, and it is only doped with nitrogen, which cannot effectively improve the fluorescence quantum yield of the prepared carbon quantum dots.

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  • Petroleum based carbon quantum dot, and preparation method and applications thereof
  • Petroleum based carbon quantum dot, and preparation method and applications thereof
  • Petroleum based carbon quantum dot, and preparation method and applications thereof

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Embodiment 1

[0044] The present embodiment provides a kind of preparation method of petroleum-based carbon quantum dots, which comprises the following steps:

[0045] Put the vacuum residue into a porcelain boat, then place it in a tube furnace, and carbonize it at 600°C for 2 hours, wherein the heating rate of the tube furnace is 5°C / min;

[0046] Weigh 0.8g of the carbonized product and put it into a 100mL three-neck flask, add 10mL of concentrated nitric acid and 30mL of concentrated sulfuric acid in sequence to obtain a dispersion of the carbonized product;

[0047] The above-mentioned dispersion liquid was heated to reflux in an oil bath at 100° C. for 24 hours, cooled to room temperature, and then adjusted to pH 7 with NaOH solution to obtain a crude product of petroleum-based carbon quantum dots;

[0048] The obtained crude product was added to 2 mL of ammonia water, and subjected to a hydrothermal reaction at 160° C. for 24 hours to obtain a solution of the petroleum-based carbon q...

Embodiment 2

[0055] The present embodiment provides a kind of preparation method of petroleum-based carbon quantum dots, which comprises the following steps:

[0056] Put light degreased oil in a porcelain boat, then place it in a tube furnace, and carry out carbonization at 600°C for 2 hours, wherein the heating rate of the tube furnace is 5°C / min;

[0057] Weigh 0.8g of the carbonized product and put it into a 100mL three-necked flask, add 20mL of hydrogen peroxide to obtain a dispersion of heavy oil carbonized product;

[0058] The above-mentioned dispersion of heavy oil carbonization product was heated to reflux in an oil bath at 100°C for 24 hours, cooled to room temperature, and adjusted to neutrality with NaOH solution to obtain a crude product of carbon quantum dots;

[0059] Add 0.2 g of p-phenylenediamine to the obtained crude product, and conduct a hydrothermal reaction at 200° C. for 12 hours to obtain a solution of the petroleum-based carbon quantum dots;

[0060] The resulti...

Embodiment 3

[0064] The present embodiment provides a kind of preparation method of petroleum-based carbon quantum dots, which comprises the following steps:

[0065] Put the heavy deoiled oil in a porcelain boat, then place it in a tube furnace, and carbonize at 600°C for 2 hours, wherein the heating rate of the tube furnace is 5°C / min;

[0066] Weigh 0.8g of the carbonized product and put it into a 100mL three-neck flask, add 20mL of hydrogen peroxide to obtain a dispersion of the carbonized product;

[0067] The above-mentioned dispersion liquid was heated to reflux in an oil bath at 100°C for 24 hours, cooled to room temperature, and adjusted to neutrality with a saturated NaOH solution to obtain a crude product of petroleum-based carbon quantum dots;

[0068] Add 0.2 g of urea to the obtained petroleum-based carbon quantum dot crude product, and perform a hydrothermal reaction at 160° C. for 12 hours to obtain a solution of the petroleum-based carbon quantum dot;

[0069] The resulti...

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Abstract

The invention provides a petroleum based carbon quantum dot, and a preparation method and applications thereof. The preparation method comprises following steps: 1, a petroleum based carbon source issubjected to carbonization processing so as to obtain a carbonized sample; 2, the carbonized sample is added into an acid solution or hydrogen peroxide so as to obtain a carbonized sample dispersion liquid; 3, the carbonized sample dispersion liquid is subjected to heating backflow processing, after backflow process, cooling is carried out so as to obtain a sample A; 4, the pH value of the sampleis adjusted to be 3 to 10 so as to obtain a petroleum based carbon quantum dot crude product; and 5, the petroleum based carbon quantum dot crude product is added into a precursor for hydro-thermal reaction so as to obtain the petroleum based carbon quantum dot solution. The petroleum based carbon quantum dot prepared using the preparation method is uniform in dispersion, and high in fluorescenceintensity.

Description

technical field [0001] The invention relates to a petroleum-based carbon quantum dot and its preparation method and application, and belongs to the technical fields of petroleum-based high value-added utilization and carbon nanometer materials. Background technique [0002] Fluorescent carbon quantum dots are a new type of carbon nanomaterial with carbon as the skeleton structure discovered in 2004. It is a quasi-spherical particle with a diameter of less than 10nm. It has low toxicity, high biocompatibility and excellent chemical inertness. As a new type of fluorescent carbon nanomaterial, carbon quantum dots also have good luminescent properties and small size characteristics. Therefore, it has good application prospects in the fields of biosensors, bioimaging, cell imaging, labeling and metal ion detection. [0003] At present, the raw materials for preparing carbon quantum dots mainly include graphite, fullerene, carbon fiber, graphene, activated carbon, lampblack, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65B82Y20/00B82Y40/00A61K49/00G01N21/64
Inventor 徐泉张霖宙赵锁奇徐春明周红军
Owner 中海储能科技(北京)有限公司