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

A kind of tungsten trioxide/cadmium tungstate nanofiber photocatalytic material and its preparation method and application

A photocatalytic material, tungsten trioxide technology, applied in the field of photocatalytic materials, can solve the problems of unfavorable photo-generated carrier transport and separation, poor material dispersion and agglomeration, difficult recycling and reuse of photocatalysts, etc. Ease of operation, enhanced photocatalytic efficiency

Active Publication Date: 2021-07-23
济南蓝海洋环保科技有限公司
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Colloids and Surfaces A:Physicochemical and Engineering Aspects 522(2017):346-354, reported that CdWO prepared by hydrothermal method combined with water bath method 4 / BiOI photocatalyst; Chinese patent document CN105642316A (application number 201510975834.9) discloses a preparation BiOI / CdWO 4 A method of heterojunction photocatalyst, which uses bismuth nitrate, sodium tungstate, potassium iodide and cadmium acetate as raw materials, and prepares BiOI / CdWO through a two-step hydrothermal method 4 Heterojunction photocatalyst, the catalyst is CdWO in the form of nanorods 4 Irregular nanoparticle BiOI loaded on the surface; CdWO prepared by prior art 4 Compared with a single photocatalyst, the / BiOI heterostructure photocatalyst has a certain improvement in its photocatalytic effect; however, the prepared material has poor dispersion and serious agglomeration, and the morphology is not conducive to the transmission and separation of photogenerated carriers, and the prepared Photocatalysts are difficult to recycle and reuse

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 tungsten trioxide/cadmium tungstate nanofiber photocatalytic material and its preparation method and application
  • A kind of tungsten trioxide/cadmium tungstate nanofiber photocatalytic material and its preparation method and application
  • A kind of tungsten trioxide/cadmium tungstate nanofiber photocatalytic material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A tungsten trioxide / cadmium tungstate (WO 3 / CdWO 4 ) preparation method of nanofiber photocatalytic material, comprising steps as follows:

[0053] (1) Preparation of spinnable precursor sol: 0.3079 g (W: 1.25 mmol) of ammonium metatungstate and 0.2665 g (Cd: 1 mmol) of cadmium acetate were dissolved in 5 mL of absolute ethanol and 5 mL of N,N-dimethylacetate In the mixed solvent composed of formamide, stir until completely dissolved, add 1 g of polyvinylpyrrolidone (PVP), stir evenly, and obtain a spinnable precursor sol with a viscosity of 0.5Pa·S;

[0054] (2) WO 3 / CdWO 4 Preparation of precursor fibers: The spinnable precursor sol was sprayed into the receiver plate with a plastic syringe with a stainless steel needle. The receiving distance between the stainless steel needle of the syringe and the receiver plate was 20 cm, and the spinnable precursor sol was sprayed The rate was 1.5 mL / h, the voltage was 20 kV, and the electrospinning temperature was controll...

Embodiment 2

[0059] A tungsten trioxide / cadmium tungstate (WO 3 / CdWO 4 ) preparation method of nanofiber photocatalytic material, comprising steps as follows:

[0060] (1) Preparation of spinnable precursor sol: 0.3695 g (W: 1.5 mmol) ammonium metatungstate and 0.2665 g (Cd: 1 mmol) cadmium acetate were dissolved in 5 mL absolute ethanol and 7 mL N,N-dimethylacetate In the mixed solvent composed of formamide, stir until completely dissolved, add 1 g of polyvinylpyrrolidone (PVP), stir evenly, and obtain a spinnable precursor sol with a viscosity of 0.5Pa·S;

[0061] (2) WO 3 / CdWO 4 Preparation of precursor fibers: The spinnable precursor sol was sprayed into the receiver plate with a plastic syringe with a stainless steel needle, and the receiving distance between the stainless steel needle of the syringe and the receiver plate was 25 cm, and the spinnable precursor sol was sprayed The rate was 1.5 mL / h, the voltage was 20 kV, and the electrospinning temperature was controlled at 25 ...

Embodiment 3

[0065] A tungsten trioxide / cadmium tungstate (WO 3 / CdWO 4 ) preparation method of nanofiber photocatalytic material, comprising steps as follows:

[0066] (1) Preparation of spinnable precursor sol: 0.4927 g (W: 2 mmol) ammonium metatungstate and 0.2665 g (Cd: 1 mmol) cadmium acetate were dissolved in 5 mL absolute ethanol and 9 mL N,N-dimethylformaldehyde In the mixed solvent composed of amide, stir until completely dissolved, add 1.2 g of polyvinylpyrrolidone (PVP), stir evenly, and obtain a spinnable precursor sol with a viscosity of 0.7 Pa·S;

[0067] (2) WO 3 / CdWO 4 Preparation of precursor fibers: The spinnable precursor sol was sprayed into the receiver plate with a plastic syringe with a stainless steel needle, and the receiving distance between the stainless steel needle of the syringe and the receiver plate was 25 cm, and the spinnable precursor sol was sprayed The rate was 1.5 mL / h, the voltage was 25 kV, and the electrospinning temperature was controlled at 25...

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
diameteraaaaaaaaaa
lengthaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a tungsten trioxide / cadmium tungstate nanofiber photocatalytic material and its preparation method and application. In the present invention, ammonium metatungstate and cadmium acetate are dissolved in a mixed solvent composed of absolute ethanol and N,N-dimethylformamide, and polyvinylpyrrolidone is added to obtain a spinnable precursor sol; by controlling the spinnable precursor The rheology and spinning process parameters of the body sol are prepared to prepare the precursor fiber, and then the precursor fiber is calcined at a high temperature at different temperatures to obtain a tungsten trioxide / cadmium tungstate nanofiber photocatalytic material, and through the preferred experimental scheme of the present invention A nanofiber photocatalytic material with a tube-in-tube structure was prepared. The tungsten trioxide / cadmium tungstate nanofiber photocatalytic material prepared by the present invention realizes efficient photocatalytic degradation of tetracycline under visible light, and the degradation rate can reach 93.1% within 120 minutes. The preparation method has simple steps, low cost, and can be recycled, greatly improving Reduced application costs.

Description

technical field [0001] The invention relates to a tungsten trioxide / cadmium tungstate nanofiber photocatalytic material, a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. Background technique [0002] With the continuous development of industrialized production in the current society, pollutants such as sewage and antibiotics generated in the process of industrial production have had a serious impact on people's lives and health. Therefore, the management and purification of the environment has become an urgent problem to be solved. In the current remediation of environmental problems, semiconductor photocatalysis technology has the unique performance of directly using solar energy as a light source to drive redox reactions, and has emerged in solving environmental problems. [0003] Cadmium Tungstate (CdWO) 4 ) has good chemical, optical, structural properties and excellent thermal stability among all tungstates....

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): B01J23/30B01J35/02B01J35/06C02F1/30C02F101/38B01J35/00
CPCB01J23/30C02F1/30C02F2101/38C02F2305/10B01J35/58B01J35/39B01J35/40
Inventor 卢启芳荣凤郭恩言魏明志
Owner 济南蓝海洋环保科技有限公司
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