A kind of preparation method of carbon nitride fluffy microsphere with high catalytic activity

A high catalytic activity, carbon nitride technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of rapid acquisition and large-scale application of zero-dimensional carbon nitride The carbon nitride size is small, the preparation process is complicated, etc., and the effect of high practical value, inhibition of agglomeration, and simple synthesis process is achieved.

Active Publication Date: 2021-12-10
ZHANGJIAGANG DONGDA IND TECH RES INST
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the size of zero-dimensional carbon nitride is very small, the agglomeration phenomenon is serious, and the preparation process is very complicated, and the yield is very low, which is not conducive to the rapid acquisition and large-scale application of zero-dimensional carbon nitride.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of carbon nitride fluffy microsphere with high catalytic activity
  • A kind of preparation method of carbon nitride fluffy microsphere with high catalytic activity
  • A kind of preparation method of carbon nitride fluffy microsphere with high catalytic activity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Put 5 g of melamine into 70 mL of sulfuric acid solution with a concentration of 0.5 mol / L, ultrasonically disperse it for 30 min, then transfer it to a 100 mL hydrothermal kettle and heat it at 180°C for 8 h, and cool it down to room temperature naturally; collect the white precipitate by suction filtration and use deionized Wash with water three times, dry overnight at 80°C, and grind into powder, which is the precursor; put the precursor into a ceramic crucible, cover the crucible and place it in the center of the muffle furnace cavity, and slowly heat up at a rate of 2°C / min Raise the temperature to 550°C and keep it warm for 4 hours, then open the furnace door and cool down to room temperature naturally to obtain fluffy carbon nitride microspheres.

[0028] figure 1 SEM images of carbon nitride fluffy microspheres under different magnifications, figure 1 a It can be seen that the size of the microspheres is relatively uniform, showing a fluffy spherical or ellipso...

Embodiment 2

[0033] Put 5 g of melamine into 70 mL of sulfuric acid solution with a concentration of 1.0 mol / L, ultrasonically disperse it for 30 min, then transfer it to a 100 mL hydrothermal kettle and heat it at 180°C for 8 h, then cool it down to room temperature naturally; collect the white precipitate by suction filtration and use deionized Wash with water three times, dry overnight at 60°C, and grind into powder, which is the precursor; put the precursor into a ceramic crucible, cover the crucible and place it in the center of the muffle furnace cavity, and slowly heat up at a rate of 2°C / min Raise the temperature to 550°C and keep it warm for 4 hours, then open the furnace door and cool down to room temperature naturally to obtain fluffy carbon nitride microspheres. The diameter of the microsphere is about 8 μm, and the specific surface area is 203.6m 2 / g, the photocatalytic first-order kinetic constant is 0.614min -1 .

Embodiment 3

[0035] Put 5 g of melamine into 70 mL of sulfuric acid solution with a concentration of 2.0 mol / L, ultrasonically disperse it for 30 min, then transfer it to a 100 mL hydrothermal kettle and heat it at 120°C for 8 h, and cool it to room temperature naturally; collect the white precipitate by suction filtration and use deionized Wash with water three times, dry overnight at 40°C, and grind into powder, which is the precursor; put the precursor into a ceramic crucible, cover the crucible and place it in the center of the muffle furnace cavity, and slowly heat up at a rate of 2°C / min Raise the temperature to 550°C and keep it warm for 4 hours, then open the furnace door and cool down to room temperature naturally to obtain fluffy carbon nitride microspheres. The diameter of the microsphere is about 14μm, and the specific surface area is 152.3m 2 / g, the photocatalytic first-order kinetic constant is 0.457min -1 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for preparing fluffy carbon nitride microspheres with high catalytic activity, which is characterized in that it comprises the following steps: (1) taking nitrogen-containing organic matter powder as raw material, acidifying with sulfuric acid, hydrothermally treating, washing and drying Obtaining the precursor; (2) Put the precursor into a ceramic crucible, cover the crucible and place it in the center of the muffle furnace cavity, and calcinate at high temperature to obtain carbon nitride fluffy microspheres. Carbon nitride fluffy microspheres are composed of carbon nitride nanosheets connected with a diameter of about 10 μm. Compared with traditional bulk carbon nitride, it can significantly improve the specific surface area and mass transfer, and has efficient photodegradation under visible light. Organic pollutant performance. The method uses wide sources of raw materials and simple operation process, and can prepare carbon nitride fluffy microspheres with high specific surface area and high catalytic activity in large quantities.

Description

technical field [0001] The invention relates to the technical field of carbon nitride nanometer material preparation, in particular to a preparation method of carbon nitride fluffy microspheres with high catalytic activity. Background technique [0002] Carbon nitride is a man-made compound composed of C element, N element and trace H element. As early as 1996, Teter and Hemley proposed through theoretical calculations that carbon nitride may have five crystal phases: α phase, β phase, cubic phase, quasi-cubic phase and graphite phase (Science, 1996.271:53). Graphite phase carbon nitride is named for its graphite-like layered structure. It is the only soft phase among the five crystal phases, and it is also the most stable crystal phase at room temperature. The C and N atoms in the graphitic carbon nitride sheet are sp 2 Hybridized and arranged alternately, connected by σ bonds to form a hexagonal structure, p z The lone pair of electrons on the orbital form a large π bon...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/08B01J35/10C02F1/30C02F101/30
Inventor 王继刚徐奇楠乔坤吴珊
Owner ZHANGJIAGANG DONGDA IND TECH RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap