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

A kind of cds/metal organic framework composite photocatalytic material and its preparation method and application

A metal-organic framework and composite photocatalysis technology, which is applied in the direction of organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the large dynamic resistance of gas-solid two-phase interface , CdS instability, weak adsorption capacity and other problems, to achieve the effect of improving photoelectric stability, improving photostability, and photocurrent stability

Inactive Publication Date: 2020-07-14
CENT SOUTH UNIV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CdS is unstable under light, and it is prone to self-oxidation to form sulfur element, which is the so-called photocorrosion phenomenon.
In addition, the specific surface area of ​​pure CdS is small, and the CO 2 The adsorption capacity of CdS is weak, and the conversion efficiency is low due to the high dynamic resistance of the gas-solid two-phase interface during the catalytic reaction process. At the same time, CdS catalyzes CO 2 Reduction to CO is less selective

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 kind of cds/metal organic framework composite photocatalytic material and its preparation method and application
  • A kind of cds/metal organic framework composite photocatalytic material and its preparation method and application
  • A kind of cds/metal organic framework composite photocatalytic material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Preparation of CdS / ZIF-8 and Its Photocatalytic Reduction of CO 2 Performance Testing

[0050] Step (1): Preparation of CdS nanomaterials

[0051] 7mmol thiourea, 7mmol Cd(NO 3 ) 2 4H 2 O and 7mmol PVP were dissolved in 70ml ethylene glycol to obtain a clear solution, then, the mixed solution was transferred to a 100ml tetrafluoroethylene-lined stainless steel autoclave, and kept at 120°C for 12h. After cooling the autoclave to room temperature, a certain amount of methanol was added to the resulting solution to make the CdS nanoparticles easier to precipitate. The solution is centrifuged, the precipitate is collected, washed and freeze-dried to obtain the CdS nanoparticles.

[0052] Step (2): Preparation of CdS / ZIF-8 composite material

[0053] First, 32 mg of CdS nanoparticles were dispersed in 10 ml of methanol and homogenized by ultrasonication, and then 0.2974 g of Zn(NO 3 ) 2 ·6H 2 O was dissolved in 50ml of methanol, the two were mixed while stirring and...

Embodiment 2

[0057] Preparation of CdS / ZIF-67 and Its Photocatalytic Reduction of CO 2 Performance Testing

[0058] Step (1): Preparation of CdS nanomaterials

[0059] 7mmol thiourea, 7mmol Cd(NO 3 ) 2 4H 2 O and 7mmol PVP were dissolved in 70ml ethylene glycol to obtain a clear solution, then, the mixed solution was transferred to a 100ml tetrafluoroethylene-lined stainless steel autoclave, and kept at 120°C for 12h. After cooling the autoclave to room temperature, a certain amount of methanol was added to the resulting solution to make the CdS nanoparticles easier to precipitate. The solution is centrifuged, the precipitate is collected, washed and freeze-dried to obtain the CdS nanoparticles.

[0060] Step (2): Preparation of CdS / ZIF-67 composite material

[0061] First, 32 mg of CdS nanoparticles were dispersed in 10 ml of methanol and homogenized by ultrasonication, and then 0.2379 g of CoCl 2 6(H 2 O) Dissolve in 50ml methanol, mix the two while stirring and continue to stir ...

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
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a CdS / metallic organic frame composite photocatalysis material as well as a preparation method and application thereof. The composite photocatalysis material is prepared by modifying a metallic organic frame on the surfaces of CdS nanoparticles. The preparation method of the composite photocatalysis material comprises the following steps: firstly, synthesizing the CdS nanoparticles by using a solvent thermal method, and modifying the metallic organic frame on the surfaces of the CdS nanoparticles by using an in-situ heterogeneous deposition method, thereby obtaining theCdS / metallic organic frame composite photocatalysis material. Compared with conventional CdS, the CdS / metallic organic frame composite photocatalysis material has improved photoelectric stability, and conversion efficiency, circulation stability and catalysis selectivity of photocatalytic reduction of carbon dioxide.

Description

technical field [0001] The invention relates to a photocatalytic material, in particular to a CdS / metal organic framework composite photocatalytic material composed of a metal organic framework modified on the surface of CdS nanoparticles, and to the preparation of CdS by a solvothermal method combined with an in-situ heterogeneous deposition method The invention relates to a method for a composite photocatalytic material of a metal organic framework, and also relates to the application of a CdS / metal organic framework composite photocatalytic material in the catalytic reduction of carbon dioxide, belonging to the technical field of photocatalytic material preparation. Background technique [0002] The photocatalytic reaction was first discovered by Japanese scientists Fujishima and Honda in 1972, who used near-ultraviolet light to irradiate TiO 2 Electrodes, successfully splitting water into oxygen and hydrogen. With the deepening of photocatalytic research, more and more ...

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): B01J31/28B01J35/10C01B32/40
CPCB01J31/28B01J35/004B01J35/10B01J35/1004B01J2531/0213B01J2531/26B01J2531/845C01B32/40
Inventor 刘又年刘颖邓留
Owner CENT SOUTH 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