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

A composite photocatalyst with high electron-hole pair separation efficiency and its preparation method

A composite photo-catalyst technology, applied in the field of photocatalysis, can solve the problem of low electron-hole separation rate, achieve the effect of improving electron-hole separation efficiency, mild synthesis conditions, and simple and easy preparation method

Active Publication Date: 2022-02-15
JIANGSU UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But g-C 3 N 4 There are still shortcomings such as low electron-hole separation rate. For g-C 3 N 4 After treatment, a single-layer or few-layer graphene-like structure carbon nitride two-dimensional material can be obtained by exfoliation, and further compounded with niobium pentoxide, its properties may show characteristics different from graphene-type 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 composite photocatalyst with high electron-hole pair separation efficiency and its preparation method
  • A composite photocatalyst with high electron-hole pair separation efficiency and its preparation method
  • A composite photocatalyst with high electron-hole pair separation efficiency and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The present invention is a kind of Nb 2 o 5 / 2D g-C 3 N 4 (6.1%) (Nb 2 o 5 accounted for the entire Nb 2 o 5 / 2Dg-C 3 N 4 6.1% of the mass of the composite photocatalyst) The preparation method of the composite photocatalytic material comprises the following steps: adding the niobium pentoxide nano-sphere flower synthesized by hydrothermal method into the deionized water, stirring for 30min, ultrasonication for 1h, making it stir evenly, and preparing Suspension with a concentration of 0.02 mg / L; add the suspension obtained by adding 2 mL of the above to melamine, stir for 40 min, and make it evenly mixed; then move the evenly stirred mixture to a crucible, put it into a muffle furnace for secondary calcination, The heating rate of the primary calcination is 2°C / min, and it is kept at 550°C for 240 minutes. The heating rate of the second calcination is 10°C / min, and it is kept at 530°C for 100 minutes. The obtained white solid is the Nb 2 o 5 / 2D g-C 3 N 4 (...

Embodiment 2

[0022] The present invention is a kind of Nb 2 o 5 / 2D g-C 3 N 4 (10.4%) (Nb 2 o 5 accounted for the entire Nb 2 o 5 / 2Dg-C 3 N 410.4% of the mass of the composite photocatalyst) The preparation method of the composite photocatalytic material comprises the following steps: adding the niobium pentoxide nano-sphere flower synthesized by hydrothermal method into deionized water, stirring for 30min, ultrasonication for 1h, making it stir evenly, and preparing Suspension with a concentration of 0.02 mg / L; add the suspension obtained by adding 4 mL of the above to melamine, stir for 40 min, and make it evenly mixed; then move the evenly stirred mixture to a crucible, put it into a muffle furnace for secondary calcination, The heating rate of the primary calcination is 3°C / min, and it is kept at 550°C for 240 minutes. The heating rate of the second calcination is 15°C / min, and it is kept at 520°C for 120 minutes. The obtained white solid is the Nb 2 o 5 / 2D g-C 3 N 4 (10....

Embodiment 3

[0024] The present invention is a kind of Nb 2 o 5 / 2D g-C 3 N 4 (17.2%) (Nb 2 o 5 accounted for the entire Nb 2 o 5 / 2Dg-C 3 N 4 17.2% of the mass of the composite photocatalyst) The preparation method of the composite photocatalytic material comprises the following steps: adding the niobium pentoxide nano-sphere flower synthesized by hydrothermal method into the deionized water, stirring for 30min, ultrasonication for 1h, making it stir evenly, and preparing Suspension with a concentration of 0.02mg / L; add the above 6mL suspension to melamine, stir for 40min to make it evenly mixed; then move the evenly stirred mixture to a crucible, put it into a muffle furnace for secondary calcination, The heating rate of the primary calcination is 4°C / min, and it is kept at 550°C for 240 minutes. The heating rate of the second calcination is 20°C / min, and it is kept at 510°C for 140 minutes. The obtained white solid is the Nb 2 o 5 / 2D g-C 3 N 4 (17.2%) composite photocatalyt...

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
quantum efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention relates to a composite photocatalyst with high electron-hole pair separation rate and a preparation method thereof. Hydrothermal synthesis of nanosphere flower-like Nb 2 o 5 The material is placed in deionized water and ultrasonically dispersed until it is evenly dispersed, then the obtained suspension is dropped into melamine, stirred, and mixed evenly; finally, the evenly stirred mixture is moved to a crucible, put into a muffle furnace for secondary calcination, The obtained white solid is the Nb 2 o 5 / 2D g‑C 3 N 4 photocatalytic material.

Description

technical field [0001] The invention relates to a composite photocatalyst with a high electron-hole pair separation rate and a preparation method thereof, which is used in the field of photocatalysis as a new energy material. Background technique [0002] As a renewable secondary energy source, hydrogen has fast reaction speed, high calorific value, and can be obtained through various methods. The only product of hydrogen after releasing energy is water, which is an environmentally friendly energy source. At present, hydrogen energy has not been widely used, but it is hailed as a promising energy source, mainly because hydrogen energy can reduce human dependence on fossil fuels, thereby reducing emissions of greenhouse gases and other toxic gases. There are many ways to produce hydrogen, which can be obtained by reforming, decomposing, photolyzing or hydrolyzing compounds, or by electrolyzing water, or using microorganisms for fermentation or photosynthesis to obtain hydrog...

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): B01J27/24C01B3/04
CPCY02E60/36
Inventor 吉海燕王婷黄济华费婷许晖李华明郑筱雯
Owner JIANGSU 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