Soft magnetic composite photocatalyst and preparation method thereof

A soft magnetic, composite light technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of decreased photocatalytic effect, increased cost and limited application And other issues

Inactive Publication Date: 2011-08-10
HENAN NORMAL UNIV
View PDF3 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The photocatalysts used in general water treatment systems are powdered TiO 2 , there are the following problems: (1) TiO 2 The degradation effect of high concentration organic pollutants is better, but the degradation rate of low concentration organic pollutants is very slow, which also greatly limits the performance of TiO 2 Application as Photocatalyst
(2) TiO 2 Powders have a tendency to agglomerate, especially in TiO 2 This trend is more obvious when the concentration is higher, and the specific surface area of ​​the photocatalys

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] (1) Mix manganese sulfate, zinc sulfate and ferrous sulfate in molar ratio Mn 2+ :Zn 2+ :Fe 2+ =1:1:4 Use deionized water to make a mixed aqueous solution to make the total concentration of metal ions M 2+ =0.1 mol / L, stir and add NH dropwise 4 OH, adjust the pH to 9. Add the equivalent of Mn in the above system 0.5 Zn 0.5 Fe 2 o 4 5 times the mass of granular activated carbon, continue to stir to make it fully mixed, then transfer to a hydrothermal reaction kettle, keep at 160 ° C for 8 hours, cool, filter, wash, and dry at 110 ° C to obtain soft magnetic activated carbon with soft magnetic properties; (2) Add 15ml of tetrabutyl titanate dropwise to 75ml of absolute ethanol under magnetic stirring, stir for 5 minutes after dropping, then add 2ml of nitric acid at one time, stir for 5 minutes, add 8ml of water dropwise, and then continue stirring for half an hour to obtain Titanium sol. Use 50ml of this titanium sol to impregnate 5g of soft magnetic activated c...

Embodiment 2

[0009] (1) Mix manganese sulfate, zinc sulfate and ferrous sulfate in molar ratio Mn 2+ :Zn 2+ :Fe 2+ =1:1:4 Use deionized water to make a mixed aqueous solution to make the total concentration of metal ions M 2+ =0.1 mol / L, stir and add NH dropwise 4 OH, adjust the pH to 11. Add the equivalent of Mn in the above system 0.5 Zn 0.5 Fe 2 o 4 16 times the mass of granular activated carbon, continue to stir to make it fully mixed, then transfer to a hydrothermal reaction kettle, keep at 180°C for 6 hours, cool, filter, wash, and dry at 110°C to obtain soft magnetic activated carbon with soft magnetic properties; (2) Add 15ml of tetrabutyl titanate dropwise to 75ml of absolute ethanol under magnetic stirring, stir for 5 minutes after dropping, then add 2ml of nitric acid at one time, stir for 5 minutes, add 8ml of water dropwise, and then continue stirring for half an hour to obtain Titanium sol. Use 50ml of this titanium sol to impregnate 3g of soft magnetic activated car...

Embodiment 3

[0011] (1) Mix manganese sulfate, zinc sulfate and ferrous sulfate in molar ratio Mn 2+ :Zn 2+ :Fe 2+ =1:1:4 Use deionized water to make a mixed aqueous solution to make the total concentration of metal ions M 2+ =0.1 mol / L, stir and add NH dropwise 4 OH, adjust the pH to 10. Add the equivalent of Mn in the above system 0.5 Zn 0.5 Fe 2 o 4 8 times the mass of granular activated carbon, continue to stir to make it fully mixed, then transfer to a hydrothermal reaction kettle, keep at 200 ° C for 4 hours, cool, filter, wash, and dry at 110 ° C to obtain soft magnetic activated carbon with soft magnetic properties; (2) Add 15ml of tetrabutyl titanate dropwise to 75ml of absolute ethanol under magnetic stirring, stir for 5 minutes after dropping, then add 2ml of nitric acid at one time, stir for 5 minutes, add 8ml of water dropwise, and then continue stirring for half an hour to obtain Titanium sol. Use 50ml of this titanium sol to impregnate 3g of soft magnetic activated ...

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 discloses a soft magnetic composite photocatalyst and a preparation method thereof, belonging to a sewage treatment technology and aiming to provide the soft magnetic composite photocatalyst easy to separate and recycle and the preparation method thereof. The technical scheme adopted by the invention comprises the following key point that granular active carbon is loaded with soft magnetic Mn0.5Zn0.5Fe2O4 and TiO2. The method for preparing the soft magnetic composite photocatalyst comprises the following steps of: (1) after manganese sulfate, zinc sulfate and green copperas are prepared into a mixed solution by ionized water, adding the granular active carbon into the mixed solution, uniformly stirring and reacting in a hydro-thermal reaction kettle, cooling, filtering, washing and drying a reaction product to obtain soft magnetic active carbon; and (2) preparing tetrabutyl titanate, absolute ethyl alcohol, nitric acid and water into a titanic acid solution, impregnating the soft magnetic active carbon into the titanic acid solution, carrying out stirring, standing, pumping filtration and drying on the impregnated soft magnetic active carbon, then calcining the obtained product in a muffle furnace in an inert atmosphere, and cooling the calcined product to the room temperature to form the soft magnetic composite photocatalyst. The soft magnetic composite photocatalyst is used for organic wastewater treatment.

Description

Technical field: [0001] The invention relates to a sewage treatment technology, in particular a soft magnetic composite photocatalyst suitable for the treatment of waste water containing organic pollutants and a preparation method thereof. Background technique: [0002] Semiconductor photocatalytic oxidation technology is a heterogeneous advanced oxidation technology developed rapidly in recent years, which has attracted extensive attention in the research and application of organic wastewater treatment. Among them, nano-TiO 2 It has the advantages of resistance to chemical corrosion and light corrosion, stable properties, non-toxicity, high photocatalytic activity, fast reaction speed, non-selective degradation of organic matter and easy to completely mineralize it, and no secondary pollution. It is generally considered to be the most One of the green and environment-friendly catalysts with application prospect. [0003] The photocatalysts used in general water treatment ...

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): A62D3/10B01J23/889
Inventor 邢新艳赵东方朱桂芬刘玉民梁蕊席国喜
Owner HENAN NORMAL 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