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

Preparation method of Fe-OMS-2 catalyst and application of Fe-OMS-2 catalyst in degradation of organic pollutants

An organic pollutant, fe-oms-2 technology, applied in the direction of water pollutants, molecular sieve catalysts, chemical instruments and methods, etc., can solve the harsh conditions of photoactivated persulfate technology and high energy consumption of thermally activated persulfate technology problems, to achieve good catalytic degradation effect, excellent catalytic effect, and good application prospects

Inactive Publication Date: 2020-01-10
CHINA THREE GORGES UNIV
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, sulfate radicals can be generated by decomposing monomonosulfate through high-temperature pyrolysis, photocatalysis, and transition metal catalysis. However, the technology of thermally activated persulfate requires high energy consumption, and the technical conditions of photoactivated persulfate are harsh.

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 Fe-OMS-2 catalyst and application of Fe-OMS-2 catalyst in degradation of organic pollutants
  • Preparation method of Fe-OMS-2 catalyst and application of Fe-OMS-2 catalyst in degradation of organic pollutants
  • Preparation method of Fe-OMS-2 catalyst and application of Fe-OMS-2 catalyst in degradation of organic pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In a 250ml round bottom flask add MnSO 4 (8.8g), Fe(NO 3 ) 3 (0.6375g), then add 100ml of water, stir at room temperature for 10min, then continue to add 3ml of concentrated nitric acid and 5.89g of potassium permanganate (dissolved in 30ml of water) mixed solution, reflux at 100°C for 1d, then filter and wash to obtain Black powder, then dry the black powder at 120°C for 8h, after drying, calcined at 350°C for 2h to obtain the product.

[0038] figure 1 It is the characteristic scanning electron microscope picture of the Fe-OMS-2 catalyst of embodiment 1. The stick-shaped substance on the picture is Fe-OMS-2 catalyst.

[0039] figure 2 , 3 Be the XRD figure and the XPS figure of the Fe-OMS-2 catalyst of embodiment 1, can find out from the XPS figure that Fe-OMS-2 catalyst contains Fe 2+ , Fe 3+ , Mn 2+ , Mn 3+ , Mn 4+ , where Fe 2+ The content is 35.5%, Fe 3+ The content is 64.5%, Mn 2+ The content is 41.9%, Mn 3+ The content is 26.0%, Mn 4+ The content ...

Embodiment 2

[0041] The application of Fe-OMS-2 prepared by the invention in catalyzing PMS to generate sulfate radicals to degrade Acid Orange 7.

[0042] The reaction mechanism of Fe-OMS-2 catalyzing PMS to generate sulfate radicals to degrade Acid Orange 7, that is, in the presence of PMS, the low-valence Fe in Fe-OMS-2 2+ , Mn 2+ or Mn 3+ is oxidized to Fe 3+ , Mn 4+ At the same time, it is accompanied by the generation of strong oxidizing sulfate radicals and hydroxyl radicals, thereby degrading Acid Orange 7.

[0043] The steps of described Fe-OMS-2 in catalyzing PMS to produce sulfate radical degradation Acid Orange 7 reaction are as follows:

[0044] Step 1: Acid Orange 7 solution (1ml 2.5×10 -4 mol / l) into the cuvette, add PMS solution (1ml 2.5×10 -3 mol / l);

[0045] Step 2: Test and record the peak absorption of Acid Orange 7 at this time;

[0046] Step 3: Quickly add the Fe-OMS-2 catalyst into the cuvette, and measure the peak shape of the ultraviolet-visible light absor...

Embodiment 3

[0050] The application of Fe-OMS-2 prepared by the invention in catalyzing PMS to produce sulfate radicals to degrade Methylene Blue.

[0051] The reaction mechanism of Fe-OMS-2 catalyzing PMS to generate sulfate radicals to degrade Methylene Blue, that is, in the presence of PMS, the low-valence Fe in Fe-OMS-2 2+ , Mn 2+ or Mn 3+ is oxidized to Fe 3+ , Mn 4+ At the same time, it is accompanied by the generation of strong oxidizing sulfate radicals and hydroxyl radicals, thereby degrading Methylene Blue. Described Fe-OMS-2 is in the step that catalysis PMS produces sulfate radical degradation Methylene Blue reaction as follows:

[0052] Step 1: Methylene Blue solution (1ml 0.75×10 -4 mol / l) into the cuvette, add PMS solution (1ml 0.75×10 -3 mol / l);

[0053] Step 2: Test and record the absorption peak of Methylene Blue at this time;

[0054] Step 3: Quickly add the Fe-OMS-2 catalyst into the cuvette, and measure the peak shape of the Methylene Blue UV-Vis absorption spe...

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 preparation of a Fe-doped OMS-2 catalyst and application of the Fe-doped OMS-2 catalyst in degradation of organic pollutants. The Fe-OMS-2 catalyst is prepared by simply refluxing, filtering, washing, drying and calcining a mixed solution of manganese sulfate, ferric nitrate, concentrated nitric acid and potassium permanganate. The prepared catalyst can catalyze a peroxymonosulfate to generate sulfuric acid free radicals and hydroxyl free radicals. Sulfate free radicals and hydroxyl free radicals have strong oxidizing property and can oxidize and degrade organic dyes, and the catalyst can be recycled through simple filtration and washing after reaction. The preparation method of the catalyst is simple, and the obtained catalyst can continuously and efficiently activate peroxymonosulfate for multiple times at room temperature to degrade organic pollutants, can be recycled and reused after reaction, conforms to the concept of green development, and has great application prospects in the field of industrial sewage treatment.

Description

technical field [0001] The invention relates to the preparation of a Fe-OMS-2 catalyst and its application in degrading organic pollutants, belonging to the technical field of organic wastewater treatment. Background technique [0002] In the past decades, transition metal oxides (TMOs) have attracted much attention due to their favorable physical and chemical properties. TMOs are widely used in many technological applications in the fields of catalysis, molecular, adsorption, magnetic devices, and energy storage. In various TMOs, manganese oxides can exhibit different oxidation states, such as Mn 2+ , Mn 3+ and Mn 4+ , and its abundant reserves in nature have become the most concerned metal oxides in TMOs. Type II manganese oxide octahedral molecular sieve (OMS-2, KMn 8 o 16 ·nH 2 O) is a type of MnO shared by edges and corners in the manganese oxide type 6 2×2 tunnel structure composed of octahedrons (dimensions are ), is a new type of material similar to the tun...

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): B01J29/00C02F1/72C02F101/38C02F101/30
CPCB01J29/00C02F1/725C02F2101/308C02F2101/38C02F2101/40
Inventor 刘湘黄煜许悦王冰洁方景王傲天王思浩
Owner CHINA THREE GORGES 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