Preparation method and application of magnetic heterojunction catalyst for peroxymonosulfate activation

A bisulfate, heterojunction technology, applied in the field of photocatalysis, can solve the problems of narrow absorption wave range of monomer materials, unfavorable visible light absorption, different material activities, etc., to improve quantum yield, promote migration, and improve efficiency. and the effect of reaction dynamics

Pending Publication Date: 2022-01-28
LIUPANSHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There are many studies on molybdenum disulfide catalysts mentioned above, and the prepared materials have different activities. Most of the above studies are carried out on the doping of materials. The absorption wave range of monomer materials is narrow, which is not conducive to the absorption and degradation of visible light. The efficiency is low, so the preparation of composite photocatalytic materials with excellent performance is an inevitable development trend

Method used

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  • Preparation method and application of magnetic heterojunction catalyst for peroxymonosulfate activation
  • Preparation method and application of magnetic heterojunction catalyst for peroxymonosulfate activation
  • Preparation method and application of magnetic heterojunction catalyst for peroxymonosulfate activation

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) Weigh 2.379g of CoCl with an electronic balance with a stoichiometric ratio of 1:2 2 •6H 2 O and 5.406 g FeCl 3 •6H 2 O is packed in a beaker with 150mL of distilled water, and magnetically stirred until it dissolves to form A solution;

[0038] Weigh 3.23 g of sodium hydroxide and put it in a 150 mL distilled water beaker to make solution B;

[0039] Heat solution B to 90°C in a water bath, quickly drop solution A into solution B at a rate of 120 drops / min to form a mixed solution, and keep stirring the mixed solution with an electric stirrer for 2 hours while heating in a water bath at 90°C. The reactant precipitate was obtained; the precipitate was separated by a suction filtration device, and the precipitate was repeatedly washed with absolute ethanol and distilled water during the process, and the precipitate obtained after suction filtration was placed in an electric blast drying oven for 8 hours at 100°C;

[0040] (2) The above dried product is then calci...

Embodiment 2

[0045] The difference between Example 2 and Example 1 lies in that in step (3): the dosage of cobalt ferrite sample is 0.1205 g, the dosage of sodium molybdate is 0.3629 g, and the dosage of thiourea is 0.3425 g.

Embodiment 3

[0047] The difference between Example 2 and Example 1 lies in that in step (3): the amount of cobalt ferrite sample used is 0.0800 g, the amount of sodium molybdate used is 0.3629 g, and the amount of thiourea used is 0.3425 g.

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Abstract

The invention discloses a preparation method and application of a magnetic heterojunction catalyst for peroxymonosulfate activation, and relates to the technical field of photocatalysis. The specific preparation method comprises the following steps: (1) preparing CoFe2O4 from CoCl2.6H2O and FeCl3.6H2O through a coprecipitation method; (3) mixing CoFe2O4 and water to obtain a suspension A; dissolving sodium molybdate (Na2MoO4.2H2O) and thiourea (CSN2H4) in water to form a mixed solution B, dropwise adding the mixed solution B into the suspension A, adjusting the pH value of the reaction solution to 3.0, and stirring for 30-40 minutes to obtain a precursor solution; and (4) reacting the precursor solution at 200 DEG C for 24 hours, and centrifugally washing and drying to obtain the magnetic heterojunction catalyst. The preparation process is simple and easy to control, and the prepared product is high in purity and high in degradation efficiency when being applied to photocatalytic degradation of norfloxacin.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a preparation method and application of a magnetic heterojunction catalyst used for activation of hydrogen persulfate. Background technique [0002] Molybdenum disulfide material has stable physical and chemical properties, large specific surface area, and active sites. The lower limit of its forbidden band width is 1.2 eV, and the upper limit is 1.9 eV. It fluctuates dynamically in this range, and the lower limit of the absorption wavelength of visible light is 673nm. , the upper limit is 1066nm. In the visible range of the solar spectrum, it responds well to visible light and is suitable for photocatalytic reactions. The edge potential of the conduction band and the valence band is relatively high. When it is prepared into a composite material, photoelectrons are easy to separate holes, which can efficiently degrade organic pollutants. It is widely used in the removal o...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J35/00C02F1/30C02F1/72C02F101/38C02F101/34
CPCB01J27/0515C02F1/30C02F1/725C02F2305/10C02F2101/34C02F2101/38B01J35/33B01J35/39Y02W10/37
Inventor 冯姗艾德春成春兰杜海刚谢太平李华誉
Owner LIUPANSHUI NORMAL UNIV
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