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Method for degrading PPCPs by metal ion doped MoS2 activated monopersulfate

A metal ion and persulfate technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems that have not been seen before, achieve simple operation, improve electrical conductivity and catalytic activity, and excellent The effect of anti-leaching ability

Active Publication Date: 2019-12-31
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite the MoS 2 Doping research in the form of thin films or nanosheets, but in the field of water pollution treatment technology, MoS 2 Doping metals and then activating monopersulfate to treat PPCPs in water has never been seen at home and abroad.

Method used

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  • Method for degrading PPCPs by metal ion doped MoS2 activated monopersulfate
  • Method for degrading PPCPs by metal ion doped MoS2 activated monopersulfate
  • Method for degrading PPCPs by metal ion doped MoS2 activated monopersulfate

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Experimental program
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Effect test

Embodiment 1

[0053] like figure 1 , MoS is doped with copper ions, iron ions and cobalt ions in this example 2 Activated method for the degradation of PPCPs by monopersulfate using MoS doped with metal ions 2 To activate monopersulfate, the specific preparation steps are as follows:

[0054] Step 1. Preparation of metal ion-doped MoS 2 ,Specific steps are as follows:

[0055] 1.1 Add ammonium molybdate and thiourea into water according to the molar ratio of 1:2, and ultrasonicate for 1-2h to obtain a uniformly mixed reaction solution;

[0056] 1.2 Transfer the reaction solution into a polytetrafluoroethylene autoclave and react at 160-200°C for 24 hours; after the reaction kettle is cooled to room temperature, the reaction solution is removed and centrifuged, washed with deionized water and centrifuged several times; the product Move to 40-60℃ oven to dry for 12-18h; get MoS with mixed valence state 2 ;

[0057] 1.3 Mix 30 mL of water and 40 mg of the above synthesized valence MoS 2...

Embodiment 2

[0070] Step 1. Preparation of metal ion-doped MoS 2 ,Specific steps are as follows:

[0071] 1.1 Add molybdenum oxide and thioacetamide into water according to the molar ratio of 1:2.5, and ultrasonicate for 1.5h to obtain a uniformly mixed reaction solution;

[0072] 1.2 The reaction solution was transferred into a polytetrafluoroethylene autoclave and reacted at 180°C for 24 hours; after the reaction kettle was cooled to room temperature, the reaction solution was removed and centrifuged, washed with deionized water and centrifuged several times; the product was moved to Dry in an oven at 50°C for 12-18h; obtain MoS with mixed valence states 2 ;

[0073] 1.3 Mix 30 mL of water and 40 mg of the above synthesized valence MoS 2 Put it into a three-necked flask, ultrasonicate it for 1-2 hours, and mix it thoroughly to obtain a mixed solution;

[0074] 1.4 Prepare 50 mL of an aqueous solution of 0.001 mol of metal ions, mix the aqueous solution containing metal ions with the ...

Embodiment 3

[0087] This embodiment is basically the same as Embodiment 1, and the main difference is:

[0088] In step 1, MoS 2 / Co or MoS 2 The amount of Fe is different, MoS was investigated in this example 2 / Co or MoS 2 When the dosage of Fe / Fe is 0.02g / L, 0.04g / L, 0.06g / L, 0.08g / L and 0.1g / L, for the pollutant solution containing diclofenac sodium (the initial concentration of diclofenac sodium is 10mg / L) Treatment effect; the stirring speed of mixing the two is 400 rpm, the temperature is 25° C., and the pH of the mixed solution obtained in step 1 is adjusted to 6.5 by using 0.1 mM HCl and 0.1 mM NaOH.

[0089] like image 3 As shown, the degradation effects of 0.06g / L and 0.08g / L on diclofenac sodium are similar, and 0.1g / L can completely degrade diclofenac sodium in 30min, and there may be adsorption. So choose 0.06g / L as the best dosage.

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Abstract

The invention discloses a method for degrading PPCPs by metal ion doped MoS2 activated monopersulfate, and belongs to the field of sewage treatment. Metal ions are used for doping MoS2 to generate more sulfur holes and metal ions with different valence states, so that monopersulfate can be well activated to form free radicals, and pollutants are oxidized and degraded by utilizing the free radicals. Molybdenum salt and sulfur source materials for synthesizing the catalyst are low in cost, fewer catalysts are added, and economic benefits are achieved. The method disclosed by the invention showsa wide application prospect in treating organic pollutants in water bodies.

Description

technical field [0001] The invention belongs to the technical field of water pollution treatment. More specifically, it relates to metal ion doping of MoS 2 Material preparation method and application of degrading PPCPs in water. Background technique [0002] In recent years, with the continuous improvement of people's living standards and industrial level; in order to meet the diversification and functionalization of people's needs, more and more chemical industrial products are produced; and their main and by-products are continuously discharged along with the production, use and other processes. Enter the ecological environment and become emerging pollutants. Among them, medicines and personal care products (PPCPs), as a class of emerging pollutants, have been frequently detected in sewage, surface water, groundwater, and soil, and have been proven to have certain risks to the ecological environment and human health. PPCPs have the characteristics of large output, wide...

Claims

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Application Information

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IPC IPC(8): B01J27/051C02F1/72C02F101/30
CPCB01J27/0515C02F1/725C02F2101/30
Inventor 武利园李海燕何娟梁仓谭朝洪
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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