Batch preparation method of porous carbon nitride material under assistance of organic carboxylic acid

A technology of organic carboxylic acid and carbon nitride, applied in chemical instruments and methods, inorganic chemistry, alkali metal compounds, etc., can solve the problems of complicated experimental steps and easy pollution of hard template method, and achieve improved mass transfer and diffusion process, Improve the degradation ability and promote the effect of rapid separation

Inactive Publication Date: 2016-06-15
SHANDONG AGRICULTURAL UNIVERSITY
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the experimental steps of the hard template method are complicated, and the acid solut

Method used

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  • Batch preparation method of porous carbon nitride material under assistance of organic carboxylic acid
  • Batch preparation method of porous carbon nitride material under assistance of organic carboxylic acid
  • Batch preparation method of porous carbon nitride material under assistance of organic carboxylic acid

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Embodiment 1

[0024] Mix melamine and analytically pure acetic acid in a mass ratio of 1:10, and disperse them in solvent water, wherein the volume ratio of water and acetic acid is 1:1. Carbonized hydrothermal precursor; the above hydrothermal precursor was calcined at 550 °C for 2 h under nitrogen protection in a tube furnace to obtain an ordered layered porous carbon nitride material, such as figure 1 , figure 2 a shown. The specific surface area of ​​the ordered layered porous carbon nitride material is 138 m 2 g -1 , much higher than the specific surface area of ​​carbon nitride materials prepared by pure melamine of 31m 2 / g, as in image 3 shown.

Embodiment 2

[0026] Mix melamine and acetic acid at a mass ratio of 1:10, and under anhydrous conditions, heat the above solution in a hydrothermal reactor at 180 °C for 16 h to obtain a porous carbon nitride hydrothermal precursor; calcined at 500 °C for 6 h under the protection of inert gas in a furnace to obtain porous carbon nitride materials, such as figure 2 b shown. The specific surface area of ​​the uniform porous carbon nitride material is 76m 2 / g.

Embodiment 3

[0028] Mix melamine and oxalic acid in a mass ratio of 1:5, and disperse them in solvent water, wherein the mass ratio of water and oxalic acid is 1:1, and heat the above solution in a hydrothermal reactor at 180 ° C for 5 hours to obtain porous carbon nitride water. Thermal precursor; the above-mentioned hydrothermal precursor is calcined at 600° C. for 2 hours under the protection of inert gas in a tube furnace to obtain a porous carbon nitride material. The specific surface area of ​​the porous carbon nitride material is 106m 2 / g.

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Abstract

The invention relates to a batch preparation method of a porous carbon nitride material under assistance of organic carboxylic acid. A hydrothermal-calcination two-step method is adopted, firstly organic carboxylic acid and melamine are uniformly mixed, then reaction is carried out under hydrothermal condition to obtain a porous carbon nitrogen hydrothermal precursor, and the hydrothermal precursor is calcined to obtain the porous carbon nitride material. By changing kind of the organic carboxylic acid and experimental conditions, controllable preparation of several kinds of porous carbon nitride materials with different structures, morphologies and specific surface areas can be realized. The batch preparation method provided by the invention has the advantages that raw materials are available, cost is low, a synthesis process is simple, operation is easy, repeatability is good, and mass preparation can be realized; and the prepared porous carbon nitride material has efficient organic pollutant adsorption degradation capacity and has a broad application prospect in the fields of treatment of environmental pollutants, hydrogen production through photocatalysis, drug loading and the like.

Description

technical field [0001] The invention relates to a method for preparing porous carbon nitride materials in batches assisted by organic carboxylic acid, and belongs to the field of material preparation. Background technique [0002] Graphitic carbon nitride has attracted widespread attention as a new metal-free semiconductor material. Carbon nitride has a graphitic-like layered structure, the interlayers are combined by van der Waals forces, and the two elements, nitrogen and carbon, are hybridized to form a highly delocalized conjugated system with high stability. As a semiconductor material, carbon nitride has a suitable band gap width (about 2.7 eV), can absorb most of the visible light, and has strong oxidation and reduction capabilities. At the same time, carbon nitride has no pollution and low toxicity to the environment and organisms. Therefore, carbon nitride has broad application prospects in photocatalytic degradation of environmental organic pollutants, photocatal...

Claims

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Application Information

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IPC IPC(8): B01J20/02B01J20/28B01J20/30B01J27/24B01J35/10
CPCB01J20/02B01J20/28054B01J27/24B01J35/1014B01J35/1019
Inventor 范海艾仕云王楠董静时伟杰韩振威
Owner SHANDONG AGRICULTURAL UNIVERSITY
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