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Preparation method and use of crystal phase carbon nitride nano-particles

A technology of crystalline phase carbon nitride and phase carbon nitride, which is applied in the field of preparation of crystalline phase carbon nitride nanoparticles, can solve the problems of low crystallinity, large particles, incomplete polymerization, etc., and achieves low cost and low energy consumption. , the effect of large application potential

Inactive Publication Date: 2018-09-28
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the carbon nitride prepared by the traditional method has a bulk structure, and there are problems such as large particles, incomplete polymerization, low crystallinity, and difficulty in film formation, which limit the application prospects of carbon nitride materials.

Method used

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  • Preparation method and use of crystal phase carbon nitride nano-particles
  • Preparation method and use of crystal phase carbon nitride nano-particles
  • Preparation method and use of crystal phase carbon nitride nano-particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Firstly, 2 g of dipolycyanamide was weighed and placed in an alumina crucible with a lid, and calcined for 2 h in an air atmosphere at a temperature of 400° C. After natural cooling, the sample was taken out and ground into powder to obtain bulk carbon nitride powder. Weigh 0.5g of bulk carbon nitride powder and 20g of molten salt (a mixture of potassium chloride and lithium chloride) to grind evenly, and calcinate at 600°C for 2 hours in a nitrogen atmosphere, and the solid obtained after natural cooling is ultrasonically dispersed in water. Suction filtration and drying to obtain crystalline carbon nitride. Weigh 0.2 g of crystalline carbon nitride, reflux in 100 mL of 0.1 M sodium hydroxide solution for 12 h, and dialyze to remove the supernatant to obtain crystalline carbon nitride nanoparticles.

Embodiment 2

[0030] Firstly, 4 g of melamine was weighed and placed in an alumina crucible with a lid, and calcined for 4 h in a nitrogen atmosphere at a temperature of 500° C. After natural cooling, the sample was taken out and ground into powder to obtain bulk carbon nitride powder. Weigh 0.2g of bulk carbon nitride powder and 20g of molten salt (a mixture of potassium bromide and lithium bromide) to grind evenly, calcinate in a nitrogen atmosphere at 500°C for 2h, and the solid obtained after natural cooling is ultrasonically dispersed in water and removed by centrifugation The supernatant was then dried to obtain crystalline carbon nitride. Weigh 0.2 g of crystalline carbon nitride, reflux in 100 mL of 0.1 M potassium hydroxide solution for 12 hours, and centrifuge to remove the supernatant to obtain crystalline carbon nitride nanoparticles.

Embodiment 3

[0032] Firstly, 20 g of urea was weighed and placed in an alumina crucible with a cover, and calcined for 4 h in an air atmosphere at a temperature of 400° C. After natural cooling, the sample was taken out and ground into powder to obtain bulk carbon nitride powder. Weigh 2g of bulk carbon nitride powder and 20g of molten salt (a mixture of potassium chloride and lithium chloride), grind them evenly, and calcinate them at 600°C for 2 hours in a nitrogen atmosphere. Filter and dry to obtain crystalline carbon nitride. Weigh 0.2 g of crystalline carbon nitride, reflux in 100 mL of 0.1 M sodium hydroxide solution for 12 h, and then dialyze to remove the alkali solution to obtain crystalline carbon nitride nanoparticles.

[0033] figure 1 It is the Fourier transform infrared spectrogram of the crystalline carbon nitride photon nanoparticles obtained in Example 1. 800cm in the picture -1 and 1000~1700cm -1 The signals in the interval correspond to the breathing vibration of t...

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Abstract

The invention discloses a preparation method and use of crystal phase carbon nitride nano-particles and belongs to the field of material preparation. The preparation method comprises calcinating cyanamide, dicyanamide, tricyanamide, thiocyanamide, thiourea and urea as precursors to obtain bulk carbon nitride, mixing the bulk carbon nitride and a molten salt, calcinating the mixture to obtain crystal phase carbon nitride, removing the molten salt, and carrying out alkali solution reflux treatment to obtain the crystal phase carbon nitride nano-particles. The carbon nitride nano-particles are crystals, have nanometer particle sizes, and can be uniformly distributed and stable in the aqueous solution. The preparation method has simple processes, realizes a low cost, satisfies the actual production needs and has great application potential in nano-materials, solar cells, sensors, bio-imaging and thin film device manufacture.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a preparation method and application of crystalline carbon nitride nanoparticles. Background technique [0002] Carbon Nitride (Carbon Nitride) has aroused widespread interest as a metal-free, environmentally friendly material. It is used in the photolysis of water to produce hydrogen (Nat. (Adv.Mater. 2009, 21, 1609), organic photosynthesis (J. Am. Chem. Soc. 2010, 132, 16299), and thin-film devices (Angew. Chem. 2015, 127, 6395) solar cells (J. Am. . Chem. Soc., 2014, 136,13486), LEDs (Adv. Opt. Mater., 2015, 3, 913), sensors (Angew. Chem., Int.Ed. 2010, 49, 9706) and Bioimaging (Angew. Chem. 2016, 128, 3736) and other aspects have been extensively studied. However, the carbon nitride prepared by the traditional method has a bulk structure, and there are problems such as large particles, incomplete polymerization, low crystallinity, and difficulty in film forma...

Claims

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Application Information

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IPC IPC(8): C01B21/082C01B3/04B82Y30/00B01J27/24B01J35/02
CPCB82Y30/00C01B3/042C01B21/0605B01J27/24C01P2004/64C01P2004/04C01P2002/82C01P2002/01B01J35/39B01J35/40Y02E60/36
Inventor 王心晨林励华王冲张健
Owner FUZHOU UNIV
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