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

One-step method for preparing GQDs modified flaky TiO2/g-C3N4 heterojunction

A g-c3n4, heterojunction technology, applied in the field of solar photocatalytic materials, can solve the problems of easy recombination of photogenerated electrons and holes, low utilization rate of solar energy, etc., and achieve the effect of simple and fast method, low cost and large specific surface area

Inactive Publication Date: 2019-08-16
SHAANXI UNIV OF SCI & TECH
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO 2 Photocatalytic oxidation technology has the advantages of strong oxidative degradation ability, stable performance, low treatment cost and no secondary pollution, but it has a wide band gap (3.2eV) and low utilization rate of solar energy.
g-C 3 N 4 The band gap is narrow (2.7eV), and the spectral response range is wide, but its photogenerated electron-hole recombination is easy

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
  • One-step method for preparing GQDs modified flaky TiO2/g-C3N4 heterojunction
  • One-step method for preparing GQDs modified flaky TiO2/g-C3N4 heterojunction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Add acetylacetone and tetrabutyl titanate in sequence to absolute ethanol at a volume ratio of 1:1:3, and mix well to obtain solution A;

[0027] 2) Add polyvinylpyrrolidone with a mass ratio of 8% to solution A, and completely dissolve to obtain solution B;

[0028] 3) Add melamine powder with a mass ratio of 12.5% ​​to solution B, and stir to obtain solution C;

[0029] 4) Add GQDs powder with a mass ratio of 0.1% to solution C, and ultrasonically disperse for 24 hours to obtain mixed solution D;

[0030] 5) Put solution D into a 5mL syringe, install the syringe on the electrospinning device, conduct electrospinning at a voltage of 20KV, a solution supply rate of 50μL / min, and a receiving distance of 20cm, and collect the product with a stainless steel plate;

[0031] 6) After the product is dried, it is calcined at 550° C. for 4 hours in an air atmosphere;

Embodiment 2

[0033] 1) Add acetylacetone and tetrabutyl titanate in sequence to absolute ethanol in a volume ratio of 1:1:2, and mix well to obtain solution A;

[0034] 2) Add polyvinylpyrrolidone with a mass ratio of 10% to solution A, and completely dissolve to obtain solution B;

[0035] 3) Add melamine powder with a mass ratio of 15% to solution B, and stir to obtain solution C;

[0036] 4) Add GQDs powder with a mass ratio of 0.15% to solution C, and ultrasonically disperse for 24 hours to obtain mixed solution D;

[0037] 5) Put solution D into a 5mL syringe, install the syringe on the electrospinning device, conduct electrospinning at a voltage of 20KV, a solution supply rate of 50μL / min, and a receiving distance of 20cm, and collect the product with a stainless steel plate;

[0038] 6) After the product is dried, it is calcined at 550° C. for 4 hours in an air atmosphere;

Embodiment 3

[0040] 1) Add acetylacetone and tetrabutyl titanate in sequence to absolute ethanol at a volume ratio of 1:1:1, and mix them uniformly to obtain solution A;

[0041] 2) Add polyvinylpyrrolidone with a mass ratio of 12% to solution A, and completely dissolve to obtain solution B;

[0042] 3) Add melamine powder with a mass ratio of 17.5% to solution B, and stir to obtain solution C;

[0043] 4) Add GQDs powder with a mass ratio of 0.2% to solution C, and ultrasonically disperse for 24 hours to obtain mixed solution D;

[0044] 5) Put solution D into a 5mL syringe, install the syringe on the electrospinning device, conduct electrospinning at a voltage of 20KV, a solution supply rate of 50μL / min, and a receiving distance of 20cm, and collect the product with a stainless steel plate;

[0045] 6) After the product is dried, it is calcined at 550° C. for 4 hours in an air atmosphere;

[0046] GQDs have good biocompatibility, stable chemical properties, good up-conversion photolumi...

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

A one-step method for preparing a GQDs modified flaky TiO2 / g-C3N4 heterojunction composite material comprises the following steps: (1) sequentially adding acetylacetone and tetrabutyl titanate into absolute ethyl alcohol to obtain a solution A; (2) adding polyvinyl pyrrolidone into the solution A to obtain a solution B after complete dissolution; (3) adding a proper amount of melamine powder intothe solution B to obtain a solution C after complete dissolution; (4) adding graphene quantum dot powder into the solution C, and ultrasonically dispersing for 24 hours to obtain a mixed solution D; (5) filling the mixed solution D into a syringe, performing electrostatic spinning under certain conditions, and collecting a spinning product by using a stainless steel disc; AND (6) after the spinning product is dried, roasting the spinning product for 4 hours at 550 DEG C in an air atmosphere. The one-step method has the characteristics of simple and quick method, low cost, improved spectral response range, reduced photogenerated electron-hole recombination rate, large specific surface area and the like, and is widely applied to photocatalytic degradation of pollutants.

Description

technical field [0001] The invention relates to the field of solar photocatalytic materials, in particular to one-step preparation of GQDs modified flake TiO 2 / g -C 3 N 4 heterojunction approach. Background technique [0002] The industrial production process produces a large amount of industrial wastewater, which not only pollutes the environment, but also poses a great hazard to human health, and must be treated before being discharged. Traditional industrial wastewater treatment methods mainly include physical methods, chemical methods and biological methods, which have the disadvantages of limited treatment capacity and high treatment costs. [0003] In recent years, photocatalytic oxidation technology has been widely used in the treatment of industrial wastewater. TiO 2 Photocatalytic oxidation technology has the advantages of strong oxidative degradation ability, stable performance, low treatment cost and no secondary pollution, but it has a wide band gap (3.2eV)...

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): B01J27/24B01J37/08B01J37/34
CPCB01J27/24B01J37/0018B01J37/343B01J35/39
Inventor 杨艳玲邹鑫鑫陈华军冯雷毕雅欣孙瑜和茹梅侯小江锁国权叶晓慧张荔陈志刚朱建锋
Owner SHAANXI UNIV OF SCI & TECH
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