Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Synthesis method of graphite phase carbonitride homotype heterojunction photocatalysis material with multilayer structure and application

A technology of graphitic carbon nitride and photocatalytic materials, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of less research, small specific surface area, and serious photogenerated electron-hole recombination and other problems, to achieve the effects of mild conditions, enhanced absorption, and simple synthesis methods

Inactive Publication Date: 2017-05-31
TIANJIN UNIV
View PDF5 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] g-C obtained by thermal polycondensation 3 N 4 As a photocatalyst, there are still two key problems: small specific surface area and severe photogenerated electron-hole recombination, which restrict its large-scale application in the fields of energy and environmental photocatalysis.
However, there are relatively few studies in this area

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
  • Synthesis method of graphite phase carbonitride homotype heterojunction photocatalysis material with multilayer structure and application
  • Synthesis method of graphite phase carbonitride homotype heterojunction photocatalysis material with multilayer structure and application
  • Synthesis method of graphite phase carbonitride homotype heterojunction photocatalysis material with multilayer structure and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Synthesis of graphite phase carbon nitride homogeneous heterojunction photocatalytic material with multi-level structure, the method is as follows:

[0024] Step 1. At room temperature, weigh 0.126g of melamine powder and 0.129g of cyanuric acid powder, disperse them in 150ml of deionized water, and stir for 4h at a speed of 8000r / min to obtain a melamine / cyanuric acid suspension; weigh 0.5 g urea, dissolved in 5mL deionized water to obtain 0.1g / ml urea aqueous solution;

[0025] Step 2, disperse the suspension obtained in step 1 into a hydrothermal kettle, place it in a muffle furnace and heat it at 180°C, react for 6 hours, and cool it down to room temperature naturally; centrifuge to obtain melamine / cyanuric acid that has completed the assembly reaction macromolecular crystals;

[0026] Step 3: Add 0.5 g of the melamine / cyanuric acid macromolecular crystal prepared in step 2 to the urea aqueous solution configured in step 1, mix and stir for 4 hours, a...

Embodiment 2

[0033] Embodiment 2: Synthesis of graphite phase carbon nitride homogeneous heterojunction photocatalytic material with multi-level structure, the method is as follows:

[0034] Step 1, with embodiment 1 step 1, make melamine / cyanuric acid suspension and 0.2g / ml urea aqueous solution;

[0035] Step 2, make melamine / cyanuric acid macromolecular crystal with embodiment 1 step 2;

[0036] Step 3, adding 1 g of the melamine / cyanuric acid macromolecular crystal prepared in step 2 to the urea aqueous solution configured in step 1, mixing and stirring for 6 hours, and centrifuging to obtain a urea-(melamine / cyanuric acid) composite precursor;

[0037] Step 4. The urea-(melamine / cyanuric acid) composite precursor prepared in step 3 was dried overnight at 60°C, and then calcined at 520°C for 2 hours in a nitrogen atmosphere in a tube furnace to obtain g-C 3 N 4 Nanoparticles deposited on g-C 3 N 4 Multi-hierarchical g-C on microtubes 3 N 4 The homogeneous heterojunction photocat...

Embodiment 3

[0041] Example 3 Synthesis of a graphitic phase carbon nitride homogeneous heterojunction photocatalytic material with a multi-level structure, the steps are basically the same as in Example 2, the only difference is: in step 4, the calcination temperature is changed from 520 ° C to 500 ° C, and finally with g-C 3 N 4 Nanoparticles deposited on g-C 3 N 4 Multi-hierarchical g-C on microtubes 3 N 4 The homogeneous heterojunction photocatalytic material is denoted as TCNH-3 photocatalyst.

[0042] Observation by scanning electron microscope (SEM), TCNH-1 photocatalyst, TCNH-2 photocatalyst and TCNH-3 photocatalyst obtained in embodiment 1-3 all present the structure of g-C3N4 nanoparticle deposition g-C3N4 microtube, wherein The particle size of g-C3N4 is about 200nm, and they are distributed on the surface of g-C3N4 microtubes with a diameter of about 1.5μm.

[0043] The graphitic phase carbon nitride homogeneous heterojunction photocatalytic material with multi-level stru...

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
lengthaaaaaaaaaa
diameteraaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a synthesis method of a graphite phase carbonitride homotype heterojunction photocatalysis material with a multilayer structure. The method comprises the following steps of preparing a melamine / cyanuric acid suspension and urea water solution; performing preparation by using the melamine / cyanuric acid suspension to obtain melamine / cyanuric acid suspension macromolecular crystals completing the assembly reaction; adding the melamine / cyanuric acid suspension macromolecular crystals into the urea water solution; performing calcination on the urea-(melamine / cyanuric acid) composite precursor obtained through preparation to obtain the graphite phase carbon nitride (g-C3N4) homotype heterojunction photocatalysis material with multilayer structures with g-C3N4 nanometer particles deposited on the g-C3N4 micrometer tubes. The synthesis method provided by the invention has the advantages that the conditions are mild; the preparation process is simple and convenient; the controllability is high; the obtained photocatalysis material can be applied to methyl orange degradation in visible light; the effect is obvious.

Description

technical field [0001] The present invention relates to a g-C with a multi-level structure 3 N 4 The simple synthesis of homogeneous heterojunction photocatalysts belongs to the synthesis and structure construction of non-metallic materials, and can be applied to the degradation of organic pollutants. Background technique [0002] At present, photocatalytic technology is widely used in the control of environmental pollution and the utilization of solar energy. It can convert low-density solar energy into high-density chemical energy or directly degrade and mineralize organic pollutants. Pollution and other issues have important application prospects. TiO 2 Due to its low price and stable chemical properties, it has become the most widely studied and applied catalyst. But TiO 2 The band gap is wide, and it can only absorb ultraviolet light with a wavelength less than 387nm, which limits its utilization efficiency of solar energy. At the same time, the polymer semiconduc...

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 Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/30
CPCC02F1/30B01J27/24C02F2101/30B01J35/40B01J35/39
Inventor 姜忠义佟振伟杨冬
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com