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

Preparation method of TiO2/ZIF-8 composite photocatalyst

A ZIF-8 and composite light technology, applied in the field of photocatalysis, can solve the problems of difficult loading of ZIF-8, achieve high thermal stability, wide application range, and improve the effect of catalytic degradation efficiency

Active Publication Date: 2019-03-22
HUAIHUA UNIV
View PDF3 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on this, it is necessary to provide a TiO 2 Preparation method of / ZIF-8 composite photocatalyst

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
  • Preparation method of TiO2/ZIF-8 composite photocatalyst
  • Preparation method of TiO2/ZIF-8 composite photocatalyst
  • Preparation method of TiO2/ZIF-8 composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The embodiment of the present invention provides a kind of TiO 2 The preparation method of / ZIF-8 composite photocatalyst comprises the following steps:

[0026] S10, solvothermal reaction is performed on the mixed solution of soluble zinc salt, 2-methylimidazole and the first organic solvent, so that 2-methylimidazole is deprotonated and zinc ions are self-assembled into ZIF-8, filtered, washed, dried and then ground Obtain ZIF-8 powder;

[0027] S20, causing the hydrolyzable titanium source to undergo a hydrolysis reaction with water in a second organic solvent to obtain a first solution containing nano-titanium dioxide sol;

[0028] S30, concentrating the first solution, increasing the concentration of the nano-titanium dioxide sol, to obtain a second solution; and

[0029] S40, adding the ZIF-8 powder to the second solution, thoroughly mixing by ultrasonic vibration, filtering, washing and drying to obtain TiO 2 / ZIF-8 composite photocatalyst.

[0030] TiO provid...

Embodiment 1

[0050] S10, first add 0.89g of Zn(NO 3 ) 2 ·6H 2 O and 0.49 g of 2-methylimidazole were dissolved in 80 ml of N,N-dimethylformamide (DMF), and then the mixed solution was transferred to a tetrafluoroethylene-lined autoclave at 5 °C min -1 The heating rate was raised to 140°C, reacted for 24 hours, and centrifuged to obtain a solid. The solid was washed with 50ml of DMF and methanol three times, and then placed in an oven at 80°C for overnight drying. After drying, it is ground into powder to obtain ZIF-8 powder.

[0051] S22, take 20ml of absolute ethanol and add it to a clean and dry flask, drop 4 drops of 0.2ml glacial acetic acid using a rubber dropper, and stir magnetically for 5 minutes; take 2ml tetrabutyl titanate and add it to the above mixture, and stir magnetically for 5 minutes; Slowly add 38ml of deionized water dropwise while stirring. The dropwise addition time is more than 15min. After the dropwise addition, the solution is heated to 45°C and continuously sti...

Embodiment 2

[0056] The preparation method is basically the same as that of Example 1, except that in step S30, 1 / 2 of the volume of the first solution is evaporated.

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 a preparation method of a TiO2-loaded composite photocatalyst. The method comprises the following steps: subjecting a mixed solution of a soluble zinc salt, 2-methylimidazoleand a first organic solvent to a heated reaction in an autoclave, subjecting 2-methylimidazole to deprotonation, self-assembling ZIF-8 from 2-methylimidazole and zinc ions, carrying out filtering, washing and drying, and then, carrying out grinding, so as to obtain ZIF-8 powder; subjecting a hydrolyzable titanium source to a hydrolysis reaction with water in a second organic solvent, so as to obtain a nano-titania containing first solution; concentrating the first solution to improve the concentration of nano-titania sol, so as to obtain a second solution; adding the ZIF-8 powder into the second solution, carrying out thorough mixing through ultrasonic oscillation, and carrying out filtering, washing and drying, thereby obtaining the TiO2 / ZIF-8 composite photocatalyst.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a TiO 2 / ZIF-8 composite photocatalyst preparation method. Background technique [0002] Photocatalytic technology, that is, semiconductor photocatalyst technology, can be used to degrade organic wastewater, reduce heavy metal ions, purify air, sterilize, and prevent fog. Therefore, semiconductor photocatalytic materials have received extensive attention in the control of environmental pollution. In order to improve the photocatalytic efficiency and service life of semiconductor materials, as well as ensure the stability and safety of materials, it is very important to continuously develop new photocatalytic materials. [0003] Nano titanium dioxide (TiO 2 ) as a photocatalyst is an n-type semiconductor material with excellent performance, which can make full use of solar energy, is highly efficient, energy-saving and environmentally friendly, and shows good photostabil...

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): B01J31/38
CPCB01J31/38B01J35/39
Inventor 向柏霖陈桂万维向德轩
Owner HUAIHUA 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