Synthesis method for Ag-In-Zn-S/CQDs heterojunction material

A technology of ag-in-zn-s and synthesis method, which is applied in the field of synthesis of Ag-In-Zn-S/CQDs heterojunction materials, achieves the effects of convenient mass production, excellent photocatalytic activity and low cost

Active Publication Date: 2019-02-22
JIANGSU UNIV
View PDF7 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the assembly of Ag-In-Zn-S/CQD by one-step in situ sy

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 for Ag-In-Zn-S/CQDs heterojunction material
  • Synthesis method for Ag-In-Zn-S/CQDs heterojunction material
  • Synthesis method for Ag-In-Zn-S/CQDs heterojunction material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2A

[0026] Example 2 Characterization and Analysis of Ag-In-Zn-S / CQDs Heterojunction Photocatalyst

[0027] figure 1 , it can be seen from the figure that although the amount of CQDs changes and the loading is 10wt%, when changing different temperatures, there are mainly peaks of Ag-In-Zn-S nanocrystals and no other miscellaneous peaks, nor The peaks of CQDs appear. The reason for this phenomenon is that the amount of carbon quantum dots added is relatively small, and the peak of carbon quantum dots is covered by the peak of Ag-In-Zn-S quantum dots.

[0028] figure 2 From the figure, we can see that the fluorescence intensity of the pure ZAIS quantum dots drops with the amount of drops, and the fluorescence intensity gradually decreases. In the figure (b), we can accurately see the fluorescence quenching state, which is It is said that electron transfer can occur between ZAIS quantum dots and CQDs. It provides a reference for exploring the appropriate CQDs loading and photoca...

Embodiment 3A

[0033] Example 3 Visible light catalytic hydrogen production experiment of Ag-In-Zn-S / CQDs photocatalyst

[0034] (1) Configure 5M sodium sulfide solution.

[0035] (2) Weigh 20 mg of Ag-In-Zn-S catalyst samples with different CQDs loadings, and place them in 35 mL reaction flasks.

[0036] (3) Then weigh 0.4725g of sodium sulfite and 1ml of 5M sodium sulfide solution into the reaction flask, and ultrasonicate for 5min.

[0037] (4) Afterwards, put it on the nine-channel for illumination, and use a 1mL syringe to extract 1ml of gas every 1h and inject it into the gas chromatograph for detection. After data processing, we can get Figure 6 hydrogen production map. Under the condition of adding sacrificial agent, the hydrogen production rate of heterojunction visible light photocatalytic water splitting loaded with 10wt% CQDs is twice that of pure Ag-In-Zn-S quantum dots. It shows that an appropriate amount of CQDs supported on Ag-In-Zn-S quantum dots can further improve the...

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 relates to I-III-VI group semiconductor quantum dots, in particular to a synthesis method for an Ag-In-Zn-S/CQDs heterojunction material. The synthesis method comprises the following steps: weighing and dissolving silver nitrate, indium nitrate and zinc acetate dihydrate in deionized water, stirring and dissolving to obtain a clear solution; dissolving a mixed ligand thiohydracrylicacid (MPA) and L-cysteine (Cys) in an aqueous solution; then adding into the clear solution to obtain a mixed solution; adjusting the pH value of the mixed solution with a NaOH solution; then adding thioacetamide and stirring ultrasonically; then adding carbon quantum dots in different amounts; then carrying out a hydrothermal reaction; and after the reaction, carrying out centrifugal drying to obtain the Ag-In-Zn-S/CQDs heterojunction material with different photocatalytic performance by selecting the capacity of the carbon quantum dots and the temperature of the hydrothermal reaction.

Description

technical field [0001] The invention relates to I-III-VI group semiconductor quantum dots, in particular to a method for synthesizing Ag-In-Zn-S / CQDs heterojunction materials. The Ag-In-Zn-S quantum dots synthesized by introducing trimercaptopropionic acid and L-cysteine ​​mixed ligands were used as the substrate, and carbon quantum dots were introduced, which were synthesized by a simple one-step hydrothermal method. Background technique [0002] Multicomponent I–III–VI semiconductor quantum dots (QDs) have attracted much attention in photocatalytic hydrogen production due to their advantages such as visible light response, large light absorption coefficient, and small self-light absorption coefficient. However, efficient semiconductor nanostructures to assist Ag-In-Zn-S QDs to reduce electron-hole recombination and facilitate carrier transfer are still lacking. In this experiment, based on the previous work of the studio, the Ag-In-Zn-S quantum dots synthesized by the int...

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): B01J31/28C01B3/04
CPCC01B3/042B01J31/28B01J35/004Y02E60/36
Inventor 毛宝东杨亚林刘艳红张科伟曹伟静杨少霞夏正龙张栋琪李丰华
Owner JIANGSU UNIV
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