Oxygen-doped porous carbon nitride nanosheets and preparation method thereof

A carbon nitride and oxygen doping technology, applied in chemical instruments and methods, nanotechnology, nitrogen compounds, etc., can solve the problems of high cost, complex preparation process, insufficient photocatalytic performance improvement of materials, etc., and achieve low cost and experimental results. The effect of strong operability and excellent photocatalytic performance

Active Publication Date: 2019-10-18
XIAN UNIV OF TECH
View PDF9 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing oxygen-doped porous carbon nitride nanosheets, which solves the problem of complex preparation pro...

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
  • Oxygen-doped porous carbon nitride nanosheets and preparation method thereof
  • Oxygen-doped porous carbon nitride nanosheets and preparation method thereof
  • Oxygen-doped porous carbon nitride nanosheets and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The invention relates to a preparation method of oxygen-doped porous carbon nitride nanosheets, using carbon-nitrogen precursors, ethanol and water as raw materials, firstly adopting ethanol-assisted hydrothermal treatment of conventional carbon-nitrogen precursors to prepare modified precursors; then The above-mentioned modified precursor is calcined at a high temperature to obtain oxygen-doped porous carbon nitride nanosheets.

[0027] Specifically follow the steps below:

[0028] Step 1, preparation of modified precursor:

[0029] Weigh the carbon-nitrogen precursor, put it into a clean polytetrafluoroethylene liner, and then add ethanol and deionized water; the mass ratio of the carbon-nitrogen precursor to deionized water is 1:100-1:1, ethanol The volume ratio to deionized water is 1:500~2:1. After stirring evenly, cover the lid and move it into the corresponding stainless steel reactor jacket, and keep it in an oven at 150~200°C for 2~20h. After cooling in the f...

Embodiment 1

[0035] Step 1, according to the mass ratio of melamine and deionized water is 1:10, the volume ratio of ethanol and deionized water is 1:80, add melamine, ethanol, deionized water to the clean polytetrafluoroethylene lining and mix, Stir evenly; cover the above polytetrafluoroethylene liner with a lid, put it into the corresponding stainless steel jacket, tighten it, put it in an oven, and keep it warm at 200 ° C for 6 hours; after cooling with the furnace, the obtained solid-liquid mixture is deionized Water and absolute ethanol were washed by centrifugation for 5 times, and then dried in an oven at 60°C for 20 hours to obtain the modified melamine precursor.

[0036] Step 2, put the precursor obtained in step 1 into an alumina crucible, cover it; heat preservation at 550°C for 2 hours, and calcine at a heating rate of 0.5°C / min to obtain porous carbon nitride nanosheets.

[0037] The g-C that embodiment 1 obtains powder TEM and X-ray photoelectron spectroscopy (XPS) photo, r...

Embodiment 2

[0039] Step 1, according to the mass ratio of melamine and deionized water is 1:5, the volume ratio of ethanol and deionized water is 1:50, add melamine, ethanol, deionized water to the clean polytetrafluoroethylene liner and mix, Stir evenly; cover the above polytetrafluoroethylene liner with a lid, put it into the corresponding stainless steel jacket, tighten it, put it in an oven, and keep it warm at 200 ° C for 6 hours; after cooling with the furnace, the obtained solid-liquid mixture is deionized Water and absolute ethanol were washed by centrifugation for 6 times, and then dried in an oven at 80°C for 12 hours to obtain the modified melamine precursor.

[0040] Step 2: Put the precursor obtained in Step 1 into an alumina crucible and cover it; heat preservation at 600°C for 1 hour, and calcining at a heating rate of 1°C / min to obtain porous carbon nitride nanosheets.

[0041] The g-C that embodiment 2 obtains 3 N 4 Powder TEM photographs, such as image 3 As shown, it...

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

No PUM Login to view more

Abstract

The invention discloses a preparation method of oxygen-doped porous carbon nitride nanosheets. The preparation method comprises the following steps: by taking a carbon-nitrogen precursor, ethanol andwater as raw materials, preparing a modified precursor from a common carbon-nitrogen precursor through ethanol assisted hydrothermal treatment, and performing high-temperature calcining on the modified precursor, so as to obtain the oxygen-doped porous carbon nitride nanosheets. Combination of morphology regulation and control and doping modification is achieved for the oxygen-doped porous carbonnitride nanosheets prepared by using the method disclosed by the invention. On one hand, the obtained carbon nitride has a remarkable two-dimensional layered porous structure, and not only is the capturing capability of the carbon nitride upon light improved, but also more charge migration channels and surface active sites can be provided; and on the other hand, regulation and control on a carbonnitride energy band structure is achieved through oxygen doping, and reaction electric potential of photo-reduction and photo-oxidation is optimized. Therefore, the prepared oxygen-doped porous carbonnitride nanosheets have excellent photocatalytic performance when being compared with conventional imporous easily-aggregated bulk-phase g-C3N4.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic material preparation, and in particular relates to an oxygen-doped porous carbon nitride nanosheet, and also relates to a preparation method of the oxygen-doped porous carbon nitride nanosheet. Background technique [0002] With the increasingly serious environmental problems and energy problems, the development and utilization of new energy, especially solar energy, has also shown a more important position. Photocatalytic technology has great application prospects in the fields of energy development and environmental protection due to its mild reaction conditions and the advantages of being able to directly convert solar energy into chemical energy. Therefore, it is of great practical value to design and develop a highly efficient, stable, environmentally friendly, and inexpensive photocatalyst. Among many photocatalysts, polymer semiconductor graphitic carbon nitride (g-C 3 N 4 ) has s...

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
IPC IPC(8): C01B21/082B82Y40/00B01J27/24
CPCC01B21/0605B82Y40/00B01J27/24B01J35/004C01P2004/24
Inventor 孙少东宋鹏梁淑华崔杰段如妍
Owner XIAN UNIV OF TECH
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