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Carbon nitride nano material as well as preparation method and application thereof

A nanomaterial, carbon nitride technology, applied in the field of material chemistry, can solve the problems of unfavorable imaging application of carbon nitride quantum dots, blue shift, complex synthesis methods, etc., to achieve long-term real-time lysosome imaging applications, good Photostability, the effect of reducing light damage

Active Publication Date: 2019-05-10
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current synthesis methods for carbon nitride nanomaterials are often complicated, and most of the methods are only aimed at the synthesis of carbon nitride nanomaterials with a specific shape. Carbon Nitride Nanomaterials
Moreover, due to the influence of the quantum confinement effect, carbon nitride quantum dots prepared from graphitic carbon nitride often have a blue shift that is not conducive to imaging applications.

Method used

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  • Carbon nitride nano material as well as preparation method and application thereof
  • Carbon nitride nano material as well as preparation method and application thereof
  • Carbon nitride nano material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Water-soluble carbon nitride quantum dots (carbon nitride quantum dots-H 2 O) Preparation

[0028] (1) Preparation of graphite phase carbon nitride CN450

[0029] Place dicyandiamide in a crucible in a muffle furnace, raise the temperature to 450°C at a heating rate of 10°C / min, and keep it warm for 4 hours to obtain light yellow graphite phase carbon nitride, which is ground into powder for later use.

[0030] (2) the graphite phase carbon nitride CN450 powder prepared by step (1) is placed in the ark, the ark is placed in the center of the quartz tube of the tube furnace, the flange gasket is tightened, and the flange gas outlet is externally connected to a 30cm long silicone tube. Insert the other end of the silicone tube into a 100 mL wide-mouth conical flask filled with 50 mL of ultrapure water for the collection solvent, so that the mouth of the silicone tube is completely submerged in the water.

[0031] (3) The tube furnace program is set: in the first stage at ...

Embodiment 2

[0037] Preparation of Carbon Nitride Quantum Dots (Carbon Nitride Quantum Dots-DMF) whose luminescence is 89nm red-shifted than graphite phase carbon nitride CN450.

[0038] (1) Preparation of graphite phase carbon nitride CN450

[0039] Place dicyandiamide in a crucible in a muffle furnace, raise the temperature to 450°C at a heating rate of 10°C / min, and keep it warm for 4 hours to obtain light yellow graphite phase carbon nitride, which is ground into powder for later use.

[0040] (2) the graphite phase carbon nitride CN450 powder prepared by step (1) is placed in the ark, the ark is placed in the center of the quartz tube of the tube furnace, the flange gasket is tightened, and the flange gas outlet is externally connected to a 30cm long silicone tube. Insert the other end of the silicone tube into a 100mL wide-mouth conical flask containing 50mL of the collection solvent N,N-dimethylformamide (DMF), so that the mouth of the silicone tube is completely submerged in N,N-di...

Embodiment 3

[0048] Preparation of Carbon Nitride Nanoleaf

[0049] (1) Put the dicyandiamide in the ark, place the ark in the center of the quartz tube of the tube furnace, tighten the flange gasket, connect a 30cm-long silicone tube to the air outlet of the flange, and insert the other end of the silicone tube into a 50mL container Put the solvent in a 100mL wide-mouth Erlenmeyer flask of ultrapure water, so that the mouth of the silicone tube is completely submerged in water.

[0050] (2) Set up the tube furnace program: in the first stage, pass nitrogen gas to the tube furnace at a flow rate of 10L / h for 1 hour to empty the air in the quartz tube; The temperature was raised to 680°C at a heating rate of 11°C / min, and kept at 680°C for 4 hours to collect the carbon nitride nanoleaf produced by thermal shearing.

[0051] (3) Ultrasonicate the dispersion liquid of the carbon nitride nano-leaf and other shape materials collected in step (2) for 30 min at a power of 400 W to make it more u...

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Abstract

The invention discloses a preparation method of a carbon nitride nano material. The preparation method of the carbon nitride nano material comprises the following steps: 1) performing heat treatment for a precursor at 600 to 750 DEG C in an inert atmosphere for 1 hour to 48 hours, wherein the precursor is one or more of graphite phase carbon nitride, melamine, dicyandiamide, urea, cyanamide and cyanuric acid; and 2) selecting a solvent according to the type of the target carbon nitride nano material, and collecting and screening the carbon nitride nano material from the heat treatment productin the step 1) by using the solvent. The invention also discloses the carbon nitride nano material prepared by the method and an application thereof. The method of the invention can obtain various morphologies of carbon nitride nanomaterials by selecting the precursor and collecting solvents, and has wide adjustability and applicability; and compared with commercial lysosome fluorescent probes, acarbon nitride quantum dot prepared by the method is better in light stability, and is more beneficial to the development of long-time real-time lysosome imaging applications.

Description

technical field [0001] The invention relates to the technical field of material chemistry, in particular to a carbon nitride nanometer material and its preparation method and application. Background technique [0002] Graphite carbon nitride (g-C 3 N 4 ), is a metal-free polymer semiconductor with suitable bandgap position, unique chemical structure and excellent stability, these advantages make g-C 3 N 4 It is widely used in the field of photocatalysis and photoelectric conversion, such as photocatalytic water hydrogen production and oxygen production, photocatalytic CO 2 Reduction and photocatalytic degradation of organic dyes, etc. Due to the small specific surface area of ​​graphitic carbon nitride, it is not conducive to further modification, and the bulk graphitic carbon nitride material is difficult to dissolve in most solvents, which limits its application in biosensing and imaging. Therefore, the preparation of carbon nitride nanomaterials is of great significa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/082C09K11/08B82Y30/00B82Y40/00
Inventor 张袁健杨孟然沈艳飞刘松琴
Owner SOUTHEAST UNIV
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