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Persulfate activator, preparation method and applications thereof

A technology of persulfate oxidation and persulfate, which is applied in the field of environmental pollutant treatment, can solve the problems of difficult recycling of metal ions, secondary pollution, etc., achieve excellent catalytic activity and increase the effect of contact area

Active Publication Date: 2020-05-12
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

External energy requires external heat and light sources, and water-soluble metal ions are difficult to recycle and cause secondary pollution

Method used

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  • Persulfate activator, preparation method and applications thereof
  • Persulfate activator, preparation method and applications thereof
  • Persulfate activator, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A persulfate activator of the present invention is Ni 2 SnO 4 -RGO, prepared by:

[0035] (1) Put 0.16g of graphite oxide in distilled water to disperse evenly by ultrasonic, the ultrasonic time is 15min, the ultrasonic power is 250W, and the ultrasonic frequency is 40kHz;

[0036] (2) 0.95g NiCl 2 ·6H 2 O and 0.70 g SnCl 4 ·5H 2 O is dissolved in distilled water to form a nickel-tin mixed salt solution;

[0037] (3) adding the mixed salt solution into the graphene oxide dispersion, stirring for 30min to form a metal salt-graphene oxide mixed solution;

[0038] (4) Use 1M NaOH to adjust the pH of the metal salt-graphene oxide mixture to 9, stir it evenly, and then carry out a hydrothermal reaction at 200°C for 12 hours. After the reaction, cool to room temperature, filter with suction, collect the precipitate, wash it, and wash it at 60 ℃ vacuum drying 12h, obtain the Ni of 0.63g present embodiment 2 SnO 4 - RGO activator. figure 1 Ni in this example2 SnO 4 -...

Embodiment 2

[0040] A persulfate activator of the present invention is Ni 2 SnO 4 -RGO, prepared by:

[0041] (1) 0.16g of graphite oxide is placed in distilled water for ultrasonic dispersion;

[0042] (2) 0.95g NiCl 2 ·6H 2 O and 0.70 g SnCl 4 ·5H 2 O is dissolved in distilled water to form a nickel-tin mixed salt solution;

[0043] (3) adding the mixed salt solution into the graphene oxide dispersion, stirring for 30min to form a metal salt-graphene oxide mixed solution;

[0044] (4) Use 1M NaOH to adjust the pH of the metal salt-graphene oxide mixture to 4. After stirring evenly, carry out a hydrothermal reaction at 200°C for 12 hours. After the reaction is completed, cool to room temperature, filter with suction, collect the precipitate, wash, and dry at 60°C. °C and vacuum dried for 12 h, no brown solid product was obtained.

Embodiment 3

[0046] A persulfate activator of the present invention is Ni 2 SnO 4 -RGO, prepared by:

[0047] (1) 0.16g of graphite oxide is placed in distilled water for ultrasonic dispersion;

[0048] (2) 0.95g NiCl 2 ·6H 2 O and 0.70 g SnCl 4 ·5H 2 O is dissolved in distilled water to form a nickel-tin mixed salt solution;

[0049] (3) adding the mixed salt solution into the graphene oxide dispersion, stirring for 30min to form a metal salt-graphene oxide mixed solution;

[0050] (4) Use 1M NaOH to adjust the pH of the metal salt-graphene oxide mixture to 9, and then carry out a hydrothermal reaction at 180°C for 10 hours after stirring evenly. After the reaction is completed, cool to room temperature, filter with suction, collect the precipitate, wash, After vacuum drying at °C for 12 hours, a brown solid product was obtained, but the yield was very low, only 0.25 g of the product.

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Abstract

The invention discloses a persulfate activating agent, a preparation method and applications thereof. The preparation method comprises the following steps: preparing a graphite oxide dispersion liquid; dissolving a nickel salt and a tin salt into water, and uniformly mixing; adding the graphite oxide dispersion liquid, and stirring; and adjusting the pH value, cooling to room temperature after carrying out a heating reaction, and performing suction filtration, washing and drying to obtain a persulfate activator, wherein the graphite oxide accounts for 1-3 parts by mass, the nickel salt accounts for 8-11 parts by mass, and the tin salt accounts for 5-9 parts by mass. The persulfate activating agent prepared by the preparation method disclosed by the invention is a nickel stannate-graphene (Ni2SnO4-RGO) compound activated persulfate, the performance of catalytic degradation of bisphenol A (BPA) is greatly improved, it is found that the degradation rate can reach 100% within 30 min underthe condition that the pH value is equal to 8, the preparation process is simple, conditions are easy to control, the preparation process is environmentally friendly, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of environmental pollutant treatment, and in particular relates to a persulfate activator and its preparation method and application. Background technique [0002] Bisphenol A (BPA) is an important chemical raw material, mainly used in the production of polycarbonate, epoxy resin, and the synthesis of plasticizers and flame retardants. Since people widely use BPA products in their lives, BPA can be transferred from these products to food and water matrices through depolymerization, leaching and migration, which will affect people's daily life environment. In particular, intake of BPA can interfere with the secretion of normal hormones in the human body, affect reproductive function, and even lead to the development of malignant tumors. At present, conventional methods for removing BPA include adsorption, microbial degradation technology, ozone oxidation, Fenton oxidation, photocatalytic oxidation, etc. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/835B01J37/02C02F1/72C02F101/34
CPCB01J23/835B01J23/002B01J37/0201C02F1/722C02F1/725C02F2101/345C02F2305/02B01J35/40
Inventor 陈海群何光裕蒋玲袁菁菁赵宜涛
Owner CHANGZHOU UNIV
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