CN113148981A - Novel green environment-friendly dragon fruit carbon dots prepared by hydrothermal method - Google Patents
Novel green environment-friendly dragon fruit carbon dots prepared by hydrothermal method Download PDFInfo
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- CN113148981A CN113148981A CN202110588531.7A CN202110588531A CN113148981A CN 113148981 A CN113148981 A CN 113148981A CN 202110588531 A CN202110588531 A CN 202110588531A CN 113148981 A CN113148981 A CN 113148981A
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- pitaya
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- dragon fruit
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- 238000001027 hydrothermal synthesis Methods 0.000 title claims abstract description 23
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 244000157072 Hylocereus undatus Species 0.000 title claims abstract description 16
- 235000018481 Hylocereus undatus Nutrition 0.000 title claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 27
- 240000008086 Echinocereus enneacanthus Species 0.000 claims abstract description 25
- 235000010837 Echinocereus enneacanthus subsp brevispinus Nutrition 0.000 claims abstract description 25
- 235000006850 Echinocereus enneacanthus var dubius Nutrition 0.000 claims abstract description 25
- 239000002243 precursor Substances 0.000 claims abstract description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000008367 deionised water Substances 0.000 claims abstract description 7
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000005360 mashing Methods 0.000 claims abstract description 5
- 239000000725 suspension Substances 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 239000002904 solvent Substances 0.000 abstract description 4
- 235000019441 ethanol Nutrition 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000002086 nanomaterial Substances 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 235000012055 fruits and vegetables Nutrition 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000002189 fluorescence spectrum Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011852 carbon nanoparticle Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 231100000481 chemical toxicant Toxicity 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000010335 hydrothermal treatment Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000004627 transmission electron microscopy Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/65—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing carbon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Composite Materials (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Optics & Photonics (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Since the discovery in 2004, carbon dots have been widely used in various fields because of their excellent optical characteristics. The invention belongs to the field of agricultural and forestry waste resource utilization and green nano materials, and particularly relates to a method for preparing novel dragon fruit carbon dots by a hydrothermal method. The invention takes fresh or deteriorated pitaya as a raw material, and the prepared carbon dots have high luminous intensity under the condition of taking ethanol as a solvent. The method mainly comprises the following steps: (1) fully mashing fresh or rotten pitaya, and adding a certain amount of deionized water to prepare a pitaya carbon point precursor turbid liquid; (2) heating a proper amount of precursor turbid liquid in a reaction kettle at high temperature for 4-8 hours; (3) after the hydrothermal reaction is finished, collecting small solid particles of carbon points on the wall of the reaction kettle, and dispersing in absolute ethyl alcohol under an ultrasonic condition to prepare the carbon points of the pitaya. The method has the advantages of simple process, wide raw material source, low cost and stronger application prospect.
Description
Technical Field
The invention belongs to the field of agricultural and forestry waste resource utilization and green nano materials, and discloses a novel dragon fruit carbon dot prepared by a hydrothermal method. The prepared carbon dots have high luminous intensity under the condition of using ethanol as a solvent. The dragon fruit carbon dots provide guidance for more green and efficient utilization of fruit and vegetable prepared carbon dots, and provide a new idea for application of the dragon fruit carbon dots in the biological field.
Background
The carbon dot is a novel fluorescent carbon nano-particle composed of elements such as carbon, hydrogen, oxygen and the like. Since its discovery in 2004, carbon dots have been widely used in various fields due to their excellent optical characteristics. Although many significant research advances have been made in this field, the rapid preparation of high quality carbon dots from a simple, environmentally friendly and low cost raw material remains an urgent need in this field.
Disclosure of Invention
Aiming at the requirements of the existing carbon dot preparation method, the patent discloses a simple and efficient carbon dot preparation method, namely, the fruit and vegetable fluorescent carbon dots are successfully prepared by carrying out hydrothermal treatment on the pitaya under the condition of not using any artificially synthesized toxic chemical reagent. The method does not need to use a strong acid solvent and a surface passivating agent, does not need a complex subsequent treatment process, and can detect the strong green luminescence property only by dispersing the prepared carbon dot solid small particles in absolute ethyl alcohol. The dragon fruit carbon dots prepared by the method provide guidance for more green and efficient utilization of fresh or rotten fruit and vegetable synthetic carbon dots, and provide a new idea for application of the dragon fruit carbon dots in the biological field.
The invention adopts a hydrothermal method to prepare green and environment-friendly pitaya carbon dots. The method comprises the following steps:
(1) fully mashing 5 g of fresh or rotten pitaya, adding a certain amount of deionized water, and fully mixing under an ultrasonic condition to form a pitaya carbon point precursor turbid liquid;
(2) taking a proper amount of the precursor turbid liquid and transferring the precursor turbid liquid into a hydrothermal reaction kettle; heating the reaction kettle at high temperature for 4-8 hours;
(3) after the hydrothermal reaction is finished, collecting small solid particles of carbon points on the wall of the reaction kettle, and dispersing in absolute ethyl alcohol under an ultrasonic condition to prepare the carbon points of the pitaya.
The pitaya may be fresh or it may be rancid and partially liquefied but not yet dried to become brittle.
The dragon fruit carbon point precursor suspension is uniform and stable suspension formed by adding deionized water in an amount which is 0.1-2.0 times of the mass of the dragon fruit slurry under the ultrasonic-assisted dispersion condition.
The adding amount of the pitaya carbon point precursor suspension in the hydrothermal reaction kettle is 5-20% of the maximum volume of the reaction kettle, the reaction temperature is 100 ℃, and the reaction time is 4-8 hours.
The carbon point solid particles attached to the inner wall of the reaction kettle are collected and mainly positioned at the upper 1/2-2/3 of the inner wall of the reaction kettle.
Drawings
FIG. 1 is a representation of the morphology of the carbon dots of pitaya by means of transmission electron microscopy.
FIG. 2 shows fluorescence spectra of carbon dots of pitaya in water and ethanol solvents, respectively.
FIG. 3 shows the carbon dots of dragon fruit at different excitation wavelengths (λ)ex320-.
Fig. 4 shows the uv spectrum and the fluorescence spectrum of the carbon dots of pitaya.
Detailed Description
Example 1
The method for preparing the green and environment-friendly pitaya carbon dots by adopting the hydrothermal method comprises the following steps:
(1) fully mashing 5 g of fresh dragon fruits, adding 3g of deionized water, and fully mixing under an ultrasonic condition to form a dragon fruit carbon point precursor turbid liquid;
(2) 6mL of the precursor turbid liquid is taken and transferred into a 30mL hydrothermal reaction kettle; heating the reaction kettle at 100 ℃ for 6 hours;
(3) and after the hydrothermal reaction is finished, naturally cooling the reaction kettle, collecting small solid particles with carbon points at 1/2 on the inner wall of the reaction kettle, and dispersing in absolute ethyl alcohol under an ultrasonic condition to obtain the carbon points of the pitaya.
Example 2
The method for preparing the green and environment-friendly pitaya carbon dots by adopting the hydrothermal method comprises the following steps:
(1) fully mashing 5 g of modified pitaya, adding 1g of deionized water, and fully mixing under an ultrasonic condition to form a carbon point precursor turbid liquid of the pitaya;
(2) taking 15mL of the precursor turbid solution and transferring the precursor turbid solution into a 50mL hydrothermal reaction kettle; heating the reaction kettle at 100 ℃ for 4 hours;
(3) and after the hydrothermal reaction is finished, naturally cooling the reaction kettle, collecting small solid particles with carbon points at 2/3 on the inner wall of the reaction kettle, and dispersing in absolute ethyl alcohol under an ultrasonic condition to obtain the carbon points of the pitaya.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (5)
1. The hydrothermal method for preparing the novel green and environment-friendly dragon fruit carbon dots is characterized by comprising the following steps of:
(1) fully mashing 5 g of fresh or rotten pitaya, adding a certain amount of deionized water, and fully mixing under an ultrasonic condition to form a pitaya carbon point precursor turbid liquid;
(2) taking a proper amount of the precursor turbid liquid and transferring the precursor turbid liquid into a hydrothermal reaction kettle; heating the reaction kettle at high temperature for 4-8 hours;
(3) after the hydrothermal reaction is finished, collecting small solid particles of carbon points on the wall of the reaction kettle, and dispersing in absolute ethyl alcohol under an ultrasonic condition to prepare the carbon points of the pitaya.
2. The hydrothermal process of claim 1, wherein the pitaya is fresh, or rancid and partially liquefied but not dried to become brittle.
3. The hydrothermal method of claim 1, wherein the suspension of the dragon fruit carbon dot precursor is relatively uniform and stable suspension formed under ultrasonic-assisted dispersion conditions with deionized water added in an amount of 0.1-2.0 times the mass of the dragon fruit slurry.
4. The hydrothermal method of claim 1, wherein the amount of the suspension of the pitaya carbon dot precursor in the hydrothermal reaction kettle is 5-20% of the maximum volume of the reaction kettle, the reaction temperature is 100 ℃, and the reaction time is 4-8 h.
5. The hydrothermal process of claim 1, wherein the collection of the carbon dot solids attached to the inner wall of the reaction vessel is performed substantially at the upper position 1/2-2/3 of the inner wall of the reaction vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110588531.7A CN113148981A (en) | 2021-05-28 | 2021-05-28 | Novel green environment-friendly dragon fruit carbon dots prepared by hydrothermal method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110588531.7A CN113148981A (en) | 2021-05-28 | 2021-05-28 | Novel green environment-friendly dragon fruit carbon dots prepared by hydrothermal method |
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| Publication Number | Publication Date |
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| CN113148981A true CN113148981A (en) | 2021-07-23 |
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| CN202110588531.7A Pending CN113148981A (en) | 2021-05-28 | 2021-05-28 | Novel green environment-friendly dragon fruit carbon dots prepared by hydrothermal method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366659A (en) * | 2015-12-14 | 2016-03-02 | 上海交通大学 | Method for hydro-thermal synthesis of carbon quantum dots based on fruits |
| CN107603608A (en) * | 2017-08-29 | 2018-01-19 | 哈尔滨工业大学 | A kind of method that fluorescent carbon point is prepared using gynostemma pentaphylla as carbon source |
| CN109796972A (en) * | 2019-01-25 | 2019-05-24 | 中南大学 | A kind of carbon quantum dot and its preparation method and application of singlet oxygen control release type |
| RU2727388C1 (en) * | 2020-03-01 | 2020-07-21 | Федеральное государственное автономное образовательное учреждение высшего образования "Северо-Восточный федеральный университет имени М.К.Аммосова" | Method of producing carbon dots from birch bark precursor |
-
2021
- 2021-05-28 CN CN202110588531.7A patent/CN113148981A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366659A (en) * | 2015-12-14 | 2016-03-02 | 上海交通大学 | Method for hydro-thermal synthesis of carbon quantum dots based on fruits |
| CN107603608A (en) * | 2017-08-29 | 2018-01-19 | 哈尔滨工业大学 | A kind of method that fluorescent carbon point is prepared using gynostemma pentaphylla as carbon source |
| CN109796972A (en) * | 2019-01-25 | 2019-05-24 | 中南大学 | A kind of carbon quantum dot and its preparation method and application of singlet oxygen control release type |
| RU2727388C1 (en) * | 2020-03-01 | 2020-07-21 | Федеральное государственное автономное образовательное учреждение высшего образования "Северо-Восточный федеральный университет имени М.К.Аммосова" | Method of producing carbon dots from birch bark precursor |
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Application publication date: 20210723 |
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