Graphite phased carbon nitride nano-ring material and its preparation method

A graphite-phase carbon nitride and nano-ring technology, applied in chemical instruments and methods, nanotechnology, nitrogen compounds, etc., can solve the problems of reducing product quantum efficiency, photocatalytic effect, and poor electrical conductivity, and achieve excellent photogenerated electron-space Hole separation ability, reduced recombination probability, and uniform product size

Inactive Publication Date: 2017-09-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation method is easy to operate, but the obtained g-C 3 N 4 It is a bulk structure with a small specific surface area, poor electrical conductivity, and serious photogenerated electron-hole recombination, which greatly reduces the quantum efficiency and photocatalytic effect of the product.

Method used

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  • Graphite phased carbon nitride nano-ring material and its preparation method
  • Graphite phased carbon nitride nano-ring material and its preparation method
  • Graphite phased carbon nitride nano-ring material and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] (1) Spread 10g of melamine powder on the bottom of quartz boat container 1, and spread 0.2g of silica nanospheres with an average diameter of 194nm on the bottom of quartz boat container 2, and place quartz boat container 1 and container 2 Inside the quartz tube.

[0041] (2) Place the quartz tube in (1) in a two-stage heating furnace, and the inner container 1 and container 2 of the quartz tube are located in the low-temperature section and the high-temperature section respectively; The container 1 filled with melamine is located upstream of the carrier gas, and the container 2 filled with silica nanospheres is located downstream of the carrier gas.

[0042] (3) The high-temperature section where the silica ball container 1 is placed is raised from room temperature to 550°C at a rate of 10°C / min, and the temperature of the low-temperature section where the melamine container 2 is placed is raised to 330°C at a rate of 10°C / min. The constant temperature reaction was ca...

Embodiment 2

[0046] (1) Spread 10g of melamine powder on the bottom of quartz boat container 1, and spread 0.2g of silica nanospheres with an average diameter of 194nm on the bottom of quartz boat container 2, and place quartz boat container 1 and container 2 Inside the quartz tube.

[0047] (2) Place the quartz tube in (1) in a two-stage heating furnace, and the inner container 1 and container 2 of the quartz tube are located in the low-temperature section and the high-temperature section respectively; The container 1 filled with melamine is located upstream of the carrier gas, and the container 2 filled with silica nanospheres is located downstream of the carrier gas.

[0048] (3) The high-temperature section where the silica ball container 1 is placed is raised from room temperature to 550°C at a rate of 10°C / min, and the temperature of the low-temperature section where the melamine container 2 is placed is raised to 330°C at a rate of 10°C / min. The reaction was carried out at constant...

Embodiment 3

[0052] (1) Spread 10g of melamine powder on the bottom of quartz boat container 1, and spread 0.2g of silica nanospheres with an average diameter of 535nm on the bottom of quartz boat container 2, and place quartz boat container 1 and container 2 in Inside the quartz tube.

[0053] (2) Place the quartz tube in (1) in a two-stage heating furnace, and the inner container 1 and container 2 of the quartz tube are located in the low-temperature section and the high-temperature section respectively; The container 1 filled with melamine is located upstream of the carrier gas, and the container 2 filled with silica nanospheres is located downstream of the carrier gas.

[0054] (3) The high-temperature section where the silica ball container 1 is placed is raised from room temperature to 550°C at a rate of 10°C / min, and the temperature of the low-temperature section where the melamine container 2 is placed is raised to 330°C at a rate of 10°C / min. The reaction was carried out at const...

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Abstract

The invention discloses a graphite phased carbon nitride (g-C3N4) nano-ring material and its preparation method, and belongs to the technical field of nanometer material preparation. The g-C3N4 nano-ring material is a ring structure, wherein the diameter of an outer ring is 20-1000 nm, the height of the outer ring is 20-200 nm, and the diameter of an internal circular hole is 10-800 nm. The preparation method includes steps of using melamine as a precursor and silicon dioxide nanosphere as a template; making the heated and sublimated precursor enter a high-temperature zone under the blowing of carrier gas to perform the heat polycondensation reaction; self-assembling a heat polycondensation product on the surface of the silicon dioxide nanosphere to form a g-C3N4 nano-ring; after cooling, removing the template by etching reagent, and drying the product to acquire the g-C3N4 nano-ring material. Compared with volume phase g-C3N4 formed by the heat polycondensation method, the g-C3N4 has higher specific surface area, more excellent photo-induced electron-cavity separating ability and better conductivity; thus the g-C3N4 can be used for photocatalysis hydrogen production, photocatalysis carbon dioxide reduction, and photocatalysis degraded organic matters, and other domains, and also can be used as carrier loaded catalyst or drug; therefore, the g-C3N4 nano-ring material has wide application prospect in energy source, environment and medicine domains.

Description

technical field [0001] The invention relates to a graphite-phase carbon nitride nano-ring material and a preparation method thereof, belonging to the technical field of nano-material preparation. Background technique [0002] Graphite carbon nitride (g-C 3 N 4 ) is a metal-free, two-dimensional conjugated polymer semiconductor composed of three-s-triazine structural units, with a band gap of about 2.70eV and an optical absorption limit of 460nm. Because of its non-metallicity, visible light responsiveness, physical and chemical stability, simple preparation method, and cheap and easy-to-obtain raw materials, it has become a research hotspot in the field of photocatalysis in recent years. It has been widely used in organic matter and other fields. [0003] g-C 3 N 4 The traditional preparation method is the thermal polycondensation method, that is, the precursors such as cyanamide, dicyandiamine, melamine, ammonium thiocyanate, urea or thiourea are calcined at a temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/082B82Y30/00
CPCB82Y30/00C01B21/0605C01P2002/72C01P2002/82C01P2004/03C01P2004/62C01P2006/12
Inventor 赵宗彬冯锟王爽邱介山
Owner DALIAN UNIV OF TECH
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