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Carbon nitride nanotube and preparation method thereof

A technology of nanotubes and carbon nitride, which is applied in the field of nanomaterials, can solve the problems of materials harmful to the environment and health, not suitable for large-scale production, and the size of nanotubes is not good, and achieves low cost, high yield, and a preparation method simple effect

Active Publication Date: 2016-08-24
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Although these two types can be used to prepare carbon nitride nanotubes, there are many shortcomings in the existing methods: or the preparation process is complicated, the equipment is expensive, the production cycle is long, the yield is low, and it is not suitable for large-scale production; Materials that are harmful to the environment and health are used in the preparation process; or the size of the prepared nanotubes is not good, and the performance is not good, which is not conducive to practical use

Method used

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  • Carbon nitride nanotube and preparation method thereof
  • Carbon nitride nanotube and preparation method thereof
  • Carbon nitride nanotube and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Preparation of solution: Dissolve urea and sodium bicarbonate in 100 mL of deionized water at a molar ratio of 40:1, fully stir and mix evenly to prepare a colorless and transparent solution with a urea concentration of 6 mol / L;

[0033](2) Freezing: freeze the colorless transparent solution obtained in step (1) in a low-temperature environment, the freezing temperature is -80°C, and the freezing time is 30 hours, so that the solution is frozen as a whole to obtain a uniform white blocky solid;

[0034] (3) Drying: The white massive solid obtained in step (2) is quickly transferred to a vacuum freeze dryer, and freeze-dried at a vacuum degree of ≤20Pa and a freezing temperature of -80°C. The freeze-drying time is 48h, making the white Block solid freeze-dried to constant weight;

[0035] (4) Calcination: Place the white blocky solid obtained in step (3) in a crucible with a cover, and place it in a nitrogen atmosphere furnace, heat up to a calcination temperature of...

Embodiment 2

[0039] (1) Preparation of solution: urea and sodium bicarbonate were dissolved in 50 mL of deionized water at a molar ratio of 5:1, fully stirred and mixed evenly to prepare a colorless and transparent solution with a urea concentration of 3 mol / L;

[0040] (2) Freezing: freeze the colorless transparent solution obtained in step (1) in a low-temperature environment, the freezing temperature is -80°C, and the freezing time is 30 hours, so that the solution is frozen as a whole to obtain a uniform white blocky solid;

[0041] (3) Drying: The white massive solid obtained in step (2) is quickly transferred to a vacuum freeze dryer, and freeze-dried at a vacuum degree of ≤20Pa and a freezing temperature of -70°C. The freeze-drying time is 48h, and the white Block solid freeze-dried to constant weight;

[0042] (4) Calcination: Place the white blocky solid obtained in step (3) in a crucible with a lid, and place it in a nitrogen atmosphere furnace, heat up to a calcination temperatu...

Embodiment 3

[0045] (1) Preparation of solution: urea and sodium bicarbonate were dissolved in 100mL deionized water at a molar ratio of 10:1, fully stirred and mixed evenly to prepare a colorless and transparent solution with a urea concentration of 4mol / L;

[0046] (2) Freezing: freeze the colorless transparent solution obtained in step (1) in a low-temperature environment, the freezing temperature is -80°C, and the freezing time is 24 hours, so that the solution is frozen as a whole to obtain a uniform white blocky solid;

[0047] (3) Drying: The white massive solid obtained in step (2) is quickly transferred to a vacuum freeze dryer, the vacuum degree is set to 8Pa, freeze-dried at a freezing temperature of -80°C, and the freeze-drying time is 48h. The white lumpy solid was freeze-dried to constant weight;

[0048] (4) Calcination: Place the white blocky solid obtained in step (3) in a crucible with a lid, and place it in a nitrogen atmosphere furnace, heat up to a calcination temperat...

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Abstract

The invention discloses a carbon nitride nanotube and a preparation method thereof. The component of the carbon nitride nanotube is carbon nitride represented by the chemical structural formula of C3N(4+ / -x). According to the preparation method, a urea solution is prepared from urea and sodium bicarbonate in a mole ratio, then the solution is cooled to be frozen wholly, and uniform white blocky solids are obtained; the white blocky solids are transferred into a vacuum freeze dryer rapidly and subjected to freeze drying under the conditions of the vacuum lower than or equal to 20 Pa and the freezing temperature lower than or equal to subzero 50 DEG C, solids are obtained through calcination in a nitrogen atmosphere furnace, a yellowish powdery sample is obtained and subjected to dialysis and purification, and the yellowish carbon nitride nanotube is obtained. The method is effective, practical and simple, is applicable to preparation in a laboratory and industrial production and has broad development space and great application prospect.

Description

technical field [0001] The present invention relates to a carbon nitride nanotube and a preparation method thereof, in particular to a carbon nitride nanotube and a method for easily preparing the carbon nitride nanotube with environmental friendliness, low cost, high yield and high performance, which can be mass-produced, It belongs to the field of nanomaterials. Background technique [0002] Carbon nitride (CN or C 3 N 4 ) is composed of two elements widely existing in nature, carbon and nitrogen, and contains very stable triazine (Triazine) and three-s-triazine (Tri-s-triazine) units. The perfect carbon nitride material is a narrow bandgap semiconductor (bandgap width of 2.7eV). At the same time, carbon nitride has many attractive properties, such as heat and chemical resistance, wear resistance, superhardness, water resistance, low density, non-toxicity, good biocompatibility, and high electron mobility The high rate and strong oxidation ability make carbon nitride a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/06
CPCC01B21/0605C01P2004/04C01P2004/13
Inventor 桑元华郭岱东赵莉莉蔡宁宁李海东马保金刘伟刘宏
Owner SHANDONG UNIV
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