Method for preparing carbon nitride nanoribbon and secondary assembly structure of carbon nitride nanoribbon

A technology of secondary assembly and nanobelt, applied in the fields of nanotechnology, nanotechnology, nitrogen and non-metallic compounds, etc., can solve the problems of difficult removal of hard template silicon oxide, difficulty in secondary assembly of nanostructures, and difficulty in building nanostructures. Achieve the effect of low cost, simple process and good stability

Inactive Publication Date: 2014-10-22
NAT UNIV OF DEFENSE TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

In 2005, Vinu et al. ("Preparation and characterization of well-ordered hexagonal mesoporous carbon nitride" Adv Mater, 2005, 17: 1648) used mesoporous silica SBA-15 as a hard template to prepare nitrogen with ordered mesoporous structure Carbonized MCN-1, but porous g-C3N4 After synthesis, the hard template needs to be removed, often using highly toxic HF or NH4HF2, more harmful to human body
However, in the template preparation method, it is difficult to remove silicon oxide as a hard template; in the growth preparation method, it is difficult to carry out secondary assembly of the nanostructure grown at high temperature, and it is difficult to construct a higher-level nanostructure

Method used

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  • Method for preparing carbon nitride nanoribbon and secondary assembly structure of carbon nitride nanoribbon
  • Method for preparing carbon nitride nanoribbon and secondary assembly structure of carbon nitride nanoribbon
  • Method for preparing carbon nitride nanoribbon and secondary assembly structure of carbon nitride nanoribbon

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Embodiment 1-9

[0033] [Embodiment 1-9 is the embodiment of preparing nanobelts]

Embodiment 1

[0035] The preparation method of the carbon nitride nanobelt of the present embodiment comprises the following steps:

[0036] (1) Material preparation: Weigh 1 g of melamine and 3 g of sodium chloride crystals (that is, the mass ratio of melamine and sodium chloride crystals is 1:3), put them in a mortar, and grind for 15 minutes to make the mixture pass through a 500-mesh sieve;

[0037] (2) Heating: Put the mixture sieved in step (1) in a porcelain boat, put it in a tube furnace, pass nitrogen at a flow rate of 4ml / min, raise the temperature to 550°C at a rate of 10°C / min and keep it warm 2h, cool to room temperature with the furnace;

[0038] (3) Separation: Put the product obtained in step (2) in a mortar, grind for 10 minutes to make the mixture pass through a 500-mesh sieve, dissolve it in 50ml deionized water, remove the precipitate at a centrifugal rate of 800rpm, and use a dialysis bag with a molecular weight of 1500 Dialyze for 30h to remove sodium chloride to obta...

Embodiment 2

[0042] The only difference from Example 1 is that the mass ratio of melamine and sodium chloride crystals in this example is 1:1, that is, 1 g of melamine and 1 g of sodium chloride crystals are weighed in step (1), and the rest are the same as in Example 1.

[0043] The carbon nitride nanometer bandwidth obtained in this example is 90-100nm, and the specific surface area is 90m 2 / g, the productive rate is 60wt%.

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Abstract

The invention discloses a method for preparing a carbon nitride nanoribbon and a secondary assembly structure of the carbon nitride nanoribbon. The method for preparing the carbon nitride nanoribbon comprises the following steps: (1) preparing materials; (2) heating; (3) separating; (4) drying. The invention also provides a method for preparing the secondary assembly structure of the carbon nitride nanoribbon. The method is simple in process and low in cost, and the used template is a sodium chloride crystal and can be easily dissolved and removed by water; the obtained nanoribbon is large in specific surface area, high in water solubility and good in stability, and the aqueous solution can be stabilized for over 15 days; moreover, according to the obtained nanoribbon, different secondary assembly structures, such as micro-ribbons, microrods, microtubes, bouquets and ball-flowers, are easily obtained by utilizing different alcohols, and the obtained higher structure has wider application in the fields of environment conservation, energy, national defense and chemical industry.

Description

technical field [0001] The invention relates to a method for preparing carbon nitride nanobelts and their secondary assembly structure, in particular to a method for preparing graphite phase carbon nitride (g-C 3 N 4 ) method of nanoribbons and their secondary assembled structures. Background technique [0002] Carbon nitride is composed of two elements, carbon and nitrogen. It has abundant reserves, wide sources, simple synthesis method, good economy and easy access. Graphite carbon nitride (g-C 3 N 4 ) is a narrow bandgap semiconductor with a bandgap width of about 2.7 eV, non-toxic, and metal-free. At the same time, g-C 3 N 4 It also has good mechanical properties, thermal stability, acid and alkali corrosion resistance (good stability in aqueous solutions with pH from 0 to 14), strong oxidation ability and high electron transfer rate. Based on the above advantages, g-C 3 N 4 It can be used as a new type of visible light catalyst, and can be used in photocatalysi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/082B82Y40/00B82Y30/00
Inventor 楚增勇原博李公义蒋振华胡天娇王璟李义和王春华王孝杰王清华
Owner NAT UNIV OF DEFENSE TECH
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