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

A cu-oms-2, catalyst technology, applied in water pollutants, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of high energy consumption of thermally activated persulfate technology and harsh technical conditions of photoactivated persulfate. , to achieve good catalytic degradation effect, excellent catalytic effect, and the effect of less dosage

Inactive Publication Date: 2019-11-22
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sulfate radicals can be generated by decomposing persulfate or hydrogen persulfate through high temperature pyrolysis, photocatalysis, transition metal catalysis, etc. However, the technology of thermal activation of persulfate consumes a lot of energy, and the technical conditions of photoactivation of persulfate are harsh

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In a 250ml round bottom flask add MnSO 4 (8.8g), Cu(NO 3 )2 (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.

[0036] figure 1 It is a characteristic scanning electron microscope image of the Cu-OMS-2 catalyst of Example 1. The rod-shaped substance on the picture is Cu-OMS-2 catalyst.

[0037] figure 2 It is the XPS figure of the Cu-OMS-2 catalyst of embodiment 1, it can be seen that Cu-OMS-2 catalyst contains Cu(II), Cu(I), Mn 2+ , Mn 3+ , Mn 4+ . where Cu + Content is 30%, Cu 2+ Content is 70%, Mn 2+ The content is 36%, Mn 3+ The content is 32%, Mn 4+ The content is 32%.

Embodiment 2

[0039] The step of described Cu-OMS-2 in catalyzing PMS to produce sulfate radical degradation Acid Orange 7 reaction is as follows:

[0040] Step 1: Acid Orange 7 solution (1ml, 2.5×10 -4 mmol) into the cuvette, add PMS solution (1ml, 2.5×10 -3 mmol);

[0041] Step 2: Test and record the peak absorption of Acid Orange 7 at this time;

[0042] Step 3: Quickly add the Cu-OMS-2 catalyst into the cuvette, and measure the peak shape of the AcidOrange 7 UV-Vis absorption spectrum with a UV-Vis photometer.

[0043] The Cu-OMS-2 catalyst described in step 3 has a mass of 3-7 mg.

[0044] image 3 It is Cu-OMS-2 prepared by the present invention produces the ultraviolet-visible light absorption spectrogram of sulfuric acid radical degradation Acid Orange7 in catalyzing PMS, and catalytic effect can detect the characteristic peak of AcidOrange 7 at wavelength 484nm by ultraviolet-visible photometer, by The termination of the reaction can be judged by the decrease of the absorbance...

Embodiment 3

[0047] The application of the Cu-OMS-2 prepared by the invention in catalyzing PMS to produce sulfate radicals to degrade Methylene Blue.

[0048] Described Cu-OMS-2 is in the step that catalysis PMS produces sulfate radical degradation Methylene Blue reaction as follows:

[0049] Step 1: Methylene Blue solution (0.3ml, 2.5×10 -4 mmol) into the cuvette, add PMS solution (0.3ml, 2.5×10 -3 mmol);

[0050] Step 2: Test and record the absorption peak of Methylene Blue at this time;

[0051] Step 3: Quickly add the Cu-OMS-2 catalyst into the cuvette, and measure the peak shape of the Methylene Blue UV-Vis absorption spectrum with a UV-Vis photometer.

[0052] The Cu-OMS-2 catalyst described in step 3 has a mass of 3-7mg.

[0053] Figure 4 It is Cu-OMS-2 prepared by the present invention produces the ultraviolet-visible light absorption spectrogram of sulfuric acid radical degradation Methylene Blue in catalyzing PMS, and catalytic effect can detect the characteristic peak of ...

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Abstract

The invention discloses preparation of a Cu-doped OMS-2 catalyst and application of the Cu-doped OMS-2 catalyst to degradation of organic pollutants. The Cu-OMS-2 catalyst is prepared by refluxing, filtering, washing, drying and calcining a mixed solution of manganese sulfate, copper nitrate, concentrated nitric acid and potassium permanganate. The prepared catalyst is used for catalyzing and activating peroxydisulfate to generate sulfuric acid free radicals and hydroxyl free radicals with strong oxidizing property, so that organic dyestuff is efficiently oxidized and degraded, and the catalyst can be recycled after reaction. The preparation method of the catalyst is simple; the obtained catalyst can be used for efficiently catalyzing and activating hydrogen persulfate for multiple times at room temperature to generate sulfate free radicals and hydroxyl free radicals to degrade organic pollutants; the catalyst can be recycled and repeatedly used after reaction, the catalytic performance is not obviously reduced, the industrial cost can be greatly reduced, the green production principle is met, and the catalyst has a great application prospect in the field of organic wastewater degradation.

Description

technical field [0001] The invention relates to the preparation of a Cu-OMS-2 catalyst and its application in degrading organic pollutants, belonging to the technical field of organic waste water treatment. Background technique [0002] Manganese oxides are a class of potential heterogeneous catalysts, including MnO, Mn 2 o 3 , MnO 2 and Mn 3 o 4 etc., have been applied in various oxidation-reduction reactions. Recent research results have shown that manganese oxides can be used to activate persulfate and hydrogen persulfate to generate strong oxidizing sulfate radicals to oxidize and degrade pollutants in industrial wastewater. However, the preparation process of the existing manganese catalyst is relatively complicated, the catalytic activity is not ideal, the amount of oxidant used is large, and the cost of wastewater treatment is relatively high. Manganese oxide octahedral molecular sieve (OMS-2) has become a new research hotspot after zeolite tetrahedral molecular...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03C02F1/72C02F101/30C02F101/38
CPCB01J29/03C02F1/722C02F2101/308C02F2101/38
Inventor 刘湘黄煜王冰洁许悦方景王傲天王思浩
Owner CHINA THREE GORGES UNIV
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