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Mesoporous graphite phase carbon nitride and preparation method and application thereof

A graphite-phase carbon nitride and mesoporous technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve problems such as environmental hazards, rising production costs, and protracted production cycles

Inactive Publication Date: 2018-12-21
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional soft and hard template methods require the use of silica or surfactant templates, which introduces problems such as the mixing of templates and precursors and the removal of templates, which often leads to prolonging the preparation cycle and production costs. rise, harmful to the environment and other adverse consequences

Method used

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  • Mesoporous graphite phase carbon nitride and preparation method and application thereof
  • Mesoporous graphite phase carbon nitride and preparation method and application thereof
  • Mesoporous graphite phase carbon nitride and preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0050] Dissolve a certain amount (0, 4, 8, 16 g) of ammonium chloride in 30 mL of water, add 4 g of melamine, and stir at room temperature for 30 min to obtain a white uniform solution. The white solution was transferred to a 100mL polytetrafluoroethylene-lined stainless steel hydrothermal kettle, subjected to hydrothermal reaction at 180°C for 12 hours, and suction filtered to obtain a white pasty solid. The white paste solid was dried in a vacuum oven at 80°C for 12 h, and then ground to obtain a powder; the powder was placed in a 100 mL corundum crucible with a lid, and the crucible was wrapped with aluminum foil, and baked in a muffle furnace. The temperature regime of the calcination is as follows: from room temperature to 550 °C at a rate of 5 °C / min, then kept at this temperature for 3 h, cooled naturally, and after lowering to room temperature, the sample was ground to obtain a light yellow powder. According to X-ray diffractometer (XRD) and ASAP 2020 specific surface ...

Embodiment 2

[0060] Dissolve a certain amount (0, 4, 8, 16 g) of ammonium nitrate in 30 mL of water, add 4 g of melamine, and stir at room temperature for 30 min to obtain a white uniform solution. Transfer the white solution to a 100mL polytetrafluoroethylene-lined stainless steel hydrothermal kettle, conduct a hydrothermal reaction at 180°C for 12 hours, filter with suction to obtain a white paste solid, wash the white paste solid with deionized water, and remove nitrate ion. Put the white paste solid in a vacuum drying oven and dry at 80°C for 12 hours, and grind to obtain a white powder; put the white powder in a 100mL corundum crucible with a lid, wrap the outer layer with aluminum foil, and bake in a muffle furnace , the temperature programming conditions are: from room temperature to 550 °C at a rate of 5 °C / min, and then maintained at this temperature for 3 hours, after cooling down to room temperature, the sample was ground to obtain a light yellow powder. The yellow powder is me...

Embodiment 3

[0063] Dissolve a certain amount (0, 4, 8, 16 g) of ammonium sulfate in 30 mL of water, add 4 g of melamine, and stir at room temperature for 30 min to obtain a white uniform solution. Transfer the white solution to a 100mL polytetrafluoroethylene-lined stainless steel hydrothermal kettle, conduct a hydrothermal reaction at 180°C for 12 hours, filter with suction to obtain a white paste solid, wash the white paste solid with deionized water, and remove sulfate radicals ion. Put the white paste solid in a vacuum drying oven and dry at 80°C for 12 hours, and grind to obtain a white powder; put the white powder in a 100mL corundum crucible with a lid, wrap the outer layer with aluminum foil, and bake in a muffle furnace , the temperature programming conditions are: from room temperature to 550 °C at a rate of 5 °C / min, and then maintained at this temperature for 3 hours, after cooling down to room temperature, the sample was ground to obtain a light yellow powder. The yellow pow...

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Abstract

The invention belongs to the field of functional materials, and discloses a mesoporous graphite phase carbon nitride and a preparation method and application thereof. Ammonium salt is utilized as a pore-forming agent and a hydrothermal inducer and melamine is taken as a precursor, so that controllable mesoporous g-C3N4 is prepared. Ammonium salt is hydrolyzed in water, an acidic environment is provided, melamine is partially converted into cyanuric acid under the acidic condition, melamine and cyanuric acid are connected through hydrogen bonds between molecules to form supermolecules, the supermolecules are then roasted, cyanuric acid in the supermolecules is decomposed in the process of roasting to produce a great deal of gas (serving as a bubble template), meanwhile, voids are left over,so that rich pore structures are produced in the process of forming carbon nitride by the pyrocondensation polymerization of melamine, ammonium chloride which remains after hydrothermal treatment also plays the role of the bubble template, and ultimately, the mesoporous graphite phase carbon nitride with high catalytic performance is obtained.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to a mesoporous graphite-phase carbon nitride and its preparation method and application. Background technique [0002] In today's energy and environment-friendly society, photocatalytic technology has attracted much attention, but the key technology that affects the wide application of photocatalytic technology is the research and development of photocatalysts that respond well to sunlight and have high catalytic activity. In recent years, graphitic carbon nitride, a new type of material with a graphene-like structure, has rapidly become a research hotspot for catalytic applications. Graphite carbon nitride is a cheap, easy-to-obtain, metal-free semiconductor material with the characteristics of non-toxicity and high stability. Because of its unique electronic structure and excellent stability, it is widely used in fields such as catalytic organic synthesis, energy and environm...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10B01J37/08B01J37/10C02F1/30C02F103/30C02F101/34C02F101/38
CPCC02F1/30B01J27/24B01J37/0018B01J37/0036B01J37/082B01J37/10C02F2101/38C02F2101/34C02F2101/308C02F2305/10B01J35/613B01J35/647B01J35/39
Inventor 刘自力曹敏锋左建良郑文芝王琪莹
Owner GUANGZHOU UNIVERSITY
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