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Preparation method of mesoporous graphite phase carbon nitride material

A graphite phase carbon nitride and mesoporous technology, applied in the direction of nitrogen and non-metallic compounds, can solve the problems of high price, small specific surface area of ​​products, and high toxicity of raw materials, and achieve the effect of low price

Inactive Publication Date: 2014-07-23
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is aimed at the disadvantages of high toxicity of raw materials, high price and small specific surface area of ​​the product when preparing mesoporous graphite phase carbon nitride materials. In order to solve the above problems, the present invention provides a more cost-effective Inexpensive and safe chemical reagents are used as raw materials to obtain mesoporous g-C with large specific surface area and adjustable specific surface and pore volume. 3 N 4 Materials and their preparation methods

Method used

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  • Preparation method of mesoporous graphite phase carbon nitride material
  • Preparation method of mesoporous graphite phase carbon nitride material
  • Preparation method of mesoporous graphite phase carbon nitride material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) the urotropine of 5 mass parts is dissolved in the water of 10 mass parts, obtains the urotropine aqueous solution;

[0031] (2) Immerse 0.5 parts by mass of mesoporous SBA-15 in the urotropine aqueous solution of (1), and stir for 3 hours to form a white colloidal substance;

[0032] (3) Remove excess urotropine aqueous solution by centrifugation, and then dry the white solid in an oven at 50°C for 2 hours;

[0033] (4) Grind the obtained white powder, transfer it to a crucible with a cover, and roast it in a muffle furnace. -1 The heating rate increased to 550°C, and then kept at this temperature for 2 hours, and black powder was obtained after cooling down;

[0034] (5) Disperse the black powder in excess HF (~4mol L -1 ), stirred for 1–2 days to remove the silica template

[0035] (6) Wash the sample obtained in (5) with 50 parts by mass of water and ethanol, and finally dry it in an oven at 60°C for 2 hours to obtain the mesoporous g-C 3 N 4 .

[0036] Th...

Embodiment 2

[0038] (1) the urotropine of 6 mass parts is dissolved in the water of 10 mass parts, obtains the urotropine aqueous solution;

[0039] (2) Immerse 0.6 parts by mass of mesoporous SBA-15 in the urotropine aqueous solution of (1), and stir for 3.5 hours to form a white colloidal substance;

[0040] (3) Remove excess urotropine aqueous solution by centrifugation, and then dry the white solid in an oven at 50°C for 2.5 hours;

[0041] (4) Grind the obtained white powder, transfer it to a crucible with a cover, and roast it in a muffle furnace. -1 The heating rate increased to 550°C, and then kept at this temperature for 2 hours, and black powder was obtained after cooling down;

[0042] (5) Disperse the black powder in excess HF (~4mol L -1 ), stirred for 1–2 days to remove the silica template

[0043] (6) Wash the sample obtained in (5) with 70 parts by mass of water and ethanol, and finally dry it in an oven at 60°C for 2 hours to obtain the mesoporous g-C 3 N 4 .

[0044...

Embodiment 3

[0046] (1) the urotropine of 8 mass parts is dissolved in the water of 10 mass parts, obtains the urotropine aqueous solution;

[0047] (2) Immersing 1.0 parts by mass of mesoporous MCF material in the urotropine aqueous solution of (1), and stirring for 4 hours to form a white colloidal substance;

[0048] (3) Remove excess urotropine aqueous solution by centrifugation, and then dry the white solid in an oven at 50°C for 3 hours;

[0049] (4) Grind the obtained white powder, transfer it to a crucible with a cover, and roast it in a muffle furnace. -1 The heating rate increased to 550°C, and then kept at this temperature for 2 hours, and black powder was obtained after cooling down;

[0050] (5) Disperse the black powder in excess NH 4 HF 2 (~4mol L -1 ), stirred for 1–2 days to remove the silica template

[0051] (6) Wash the sample obtained in (5) with 100 parts by mass of water and ethanol, and finally dry it in an oven at 60°C for 2 hours to obtain the mesoporous g-C ...

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Abstract

The invention belongs to the field of inorganic materials and particularly relates to a preparation method of a mesoporous graphite phase carbon nitride material with a high specific surface. The aperture of the mesoporous graphite phase carbon nitride material is 3.7-4.5nm, the specific surface is 540-796m<2> / g, the pore volume is 0.5-0.7cm<3> / g and the material is black powder. The preparation method comprises the following steps: immersing a mesoporous SBA-15 or MCF material in an urotropin aqueous solution; stirring; centrifugalizing; roasting under an inert atmosphere; removing a silicon oxide template by HF; drying in vacuum to obtain the mesoporous graphite phase carbon nitride material. The method is low raw material price, safe and convenient to prepare, and the product obtained is high. The use level of the template is adjusted to adjust the specific surface and the pore volume of the mesoporous graphite phase carbon nitride material.

Description

technical field [0001] The invention relates to the field of inorganic materials, in particular to a method for preparing a high specific surface mesoporous graphite phase carbon nitride material. Background technique [0002] Graphite carbon nitride (g-C 3 N 4 ) is a graphite-like carbon nitride covalent compound, the main body of which is a three-s-triazine or triazine structure, through the bridging between N atoms and C atoms, and finally composed of graphite-like 2π multilayer stacks carbon covalent compounds. g-C 3 N 4 It is a typical polymer semiconductor, and the C and N atoms in the structure are represented by sp 2 Hybridization forms highly delocalized π-conjugated systems. In addition, g-C 3 N 4 The special large π-conjugated structure in the parent structure can activate aromatic hydrocarbon molecules such as benzene, and at the same time, a large number of N functional group fragments rich in the edge of the graphite-like layer also make it have good ba...

Claims

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Application Information

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IPC IPC(8): C01B21/082
Inventor 许杰吴飞薛冰李永昕
Owner CHANGZHOU UNIV
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