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Bead-chain-like graphitized carbon nitride nano material and preparation method thereof

A technology of nanomaterials and carbon nitride, which is applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of poor shape controllability, difficulty in obtaining samples, and high difficulty in synthesis, so as to achieve less surface defects and better Application prospect, good effect of crystallinity

Inactive Publication Date: 2015-10-21
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the template method can obtain samples with different morphologies, the method is complex in process, poor in shape controllability, and difficult to synthesize.
Among them, the high-temperature polymerization method refers to a direct and convenient method for preparing graphitized carbon nitride polymers by polycondensation of precursors under high temperature conditions, but the morphology of samples obtained by this method is mostly large and thick layers. It is difficult to obtain samples of other shapes

Method used

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  • Bead-chain-like graphitized carbon nitride nano material and preparation method thereof
  • Bead-chain-like graphitized carbon nitride nano material and preparation method thereof
  • Bead-chain-like graphitized carbon nitride nano material and preparation method thereof

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Embodiment 1

[0035] 1.1 Weigh 1.0g (0.0079mol) melamine into 50mL ethylene glycol, stir for 30min until a uniform initial solution is obtained;

[0036] 1.2 Take 20 mL of the initial solution, add 24 mL of the prepared nitric acid aqueous solution with a concentration of 0.3 mol / L dropwise into the initial solution, and keep stirring for 30 minutes until the precipitate is completely precipitated;

[0037] 1.3 Centrifuge the above precipitate, wash it with water twice, then wash it twice with ethanol, and dry it to obtain a white solid powder of the precursor;

[0038] 1.4 Put the precursor solid powder obtained above in a tube furnace, under the protection of nitrogen atmosphere, heat up to 380°C at a heating rate of 10°C / min, keep it warm for 2 hours for calcination, and cool naturally to room temperature to obtain bead-like graphite Carbon nitride samples (such as figure 2 shown).

[0039] The structural feature of the obtained bead-like chain is: the diameter of the bead-like sub...

Embodiment 2

[0042] The preparation method is the same as that in Example 1, except that: after dripping 14.4 mL of nitric acid aqueous solution with a concentration of 0.5 mol / L, the stirring time is 10 min; calcination at 400 ° C for 1 h. The morphology of the obtained bead-like graphitized carbon nitride is as follows: image 3 As shown, the structural characteristics of the obtained bead-like chain are: the diameter of the bead-like objects is 300-500nm, and the distance between the bead-like objects is 200-500nm; the diameter of the nanorods connecting the bead-like objects is 80-250nm; the chain length 5-12.5nm.

Embodiment 3

[0044] The preparation method is the same as in Example 1, except that 14.4 mL of nitric acid aqueous solution with a concentration of 0.5 mol / L is added dropwise, the stirring time is 30 min, and the mixture is calcined at 450° C. for 1 h. The morphology of the obtained bead-like graphitized carbon nitride is as follows: Figure 4 As shown, the structural characteristics of the obtained bead-like chain are: the diameter of the bead-like objects is 300-500nm, and the distance between the bead-like objects is 200-500nm; the diameter of the nanorods connecting the bead-like objects is 80-250nm; the chain length 5-12.5nm.

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Abstract

The invention relates to a bead-chain-like graphitized carbon nitride nano material and a preparation method thereof and belongs to the technical field of semi-conductor material preparation. The bead-chain-like graphitized carbon nitride nano material adopts a bead-chain-like structure formed by arranging raised bead-like objects on the surfaces of graphitized carbon nitride nano-rods, wherein the diameter of the bead-like objects is 200-800 nm; the space between the bead-like objects is 200-800 nm; the nano-rods connected with the bead-like objects are 80-500 nm in diameter, and 5-13.6 [mu]m in chain length. The preparation method comprises the following steps: dissolving melamine into an alcohol solution to obtain an initial solution; then adding a nitric acid solution, stirring and precipitating to produce carbon nitride precursor solid powder; after that, forging to obtain the bead-chain-like graphitized carbon nitride nano material. The preparation process is simple, and the obtained product has the advantages of smooth surface, uniform size, relatively good dispersity and the like, and can serve as a template for preparing other materials or as carriers of noble metal nano-particles.

Description

technical field [0001] The invention belongs to the technical field of semiconductor material preparation, and relates to a bead chain-like graphitized carbon nitride nanometer material and a preparation method thereof. Background technique [0002] Graphite-like carbon nitride is a semiconductor material with a narrow bandgap (2.7eV) and a high carrier recombination rate. Graphite-like carbon nitride has the advantages of good thermal stability and stable chemical properties, as well as the characteristics of metal-free, non-toxic, and visible light response, making it a new type of photocatalyst, which has received extensive attention in the field of catalysts, especially its Photoelectric properties, photodegradation of organic dyes, catalysis of organic reactions, and photolysis of water to produce hydrogen make it widely used in many fields such as electronics, optics, and biology. [0003] At present, there are many methods for preparing nano-graphitized carbon nitrid...

Claims

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Application Information

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IPC IPC(8): C01B21/082B82Y30/00B82Y40/00B01J27/24
Inventor 杨萍刘雨萌王俊鹏
Owner UNIV OF JINAN
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