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Preparation method of CeO2/Co3O4 photocatalyst for activating potassium peroxymonosulfate composite salt under driving of visible light

A technology of potassium hydrogen peroxymonosulfate composite salt and photocatalyst, which is applied in catalyst activation/preparation, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem of low separation efficiency of photogenerated carriers, large amount of reagents, catalytic Long time and other problems, to achieve the effect of green environmental protection, low cost and strong catalytic activity in the preparation process

Pending Publication Date: 2020-01-10
YANCHENG TEACHERS UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the present invention provides a CeO that activates potassium monopersulfate compound salt driven by visible light. 2 / Co 3 o 4 The preparation method of the photocatalyst has the advantages of simple preparation method, controllable reaction conditions and rapid degradation of ciprofloxacin, and solves the problems of long catalysis time for ciprofloxacin, large amount of reagents, low separation efficiency of photogenerated carriers and the like. The problem of poor stability

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  • Preparation method of CeO2/Co3O4 photocatalyst for activating potassium peroxymonosulfate composite salt under driving of visible light
  • Preparation method of CeO2/Co3O4 photocatalyst for activating potassium peroxymonosulfate composite salt under driving of visible light
  • Preparation method of CeO2/Co3O4 photocatalyst for activating potassium peroxymonosulfate composite salt under driving of visible light

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preparation example Construction

[0035] see Figure 1-9 , a CeO activated by visible light-driven potassium hydrogen persulfate complex salt 2 / Co 3 o 4 The preparation method of photocatalyst comprises the following steps: 1), adding cerium nitrate, urea and PVP to 100mL deionized water, stirring at a certain temperature, suction filtration, washing and drying, to obtain white cerium dioxide precursor, step 1 The masses of cerium nitrate, urea and PVP in ) are 4.34g, 27.0g and 1.00g respectively, the stirring temperature in step 1) is 85°C, the stirring speed is 300r / min~500r / min, and the stirring time is 120min;

[0036] 2), adding the white ceria precursor obtained in step 1) to 50mL ethanol solution, and then ultrasonically dispersed to obtain a ceria precursor solution, the frequency of ultrasonic dissolution in step 2) is 30kHz~60kHz, ultrasonic Dissolving time is 60min;

[0037] 3), mix the ceria precursor solution obtained in step 2) with the cobalt ion-containing substance and the ammonium salt, ...

Embodiment 1

[0039] A Visible Light-Driven Activation of CeO Monopersulfate Complex Salt 2 / Co 3 o 4 The preparation method of photocatalyst comprises the following steps:

[0040] 1) Synthesis of ceria precursor;

[0041] 1.1) Dissolve 4.34g of cerium nitrate hexahydrate in 100mL of deionized water, then add 1.00g of polyvinylpyrrolidone (PVP) and 27.0g of urea, and stir at 85°C for 2 hours at a stirring speed of 200r / min. Obtain ceria precursor suspension;

[0042] 1.2) The white precipitate obtained by suction filtration of the suspension obtained in step 2.2) was washed with deionized water, dried at 60° C. for 3 hours and collected, named as ceria precursor;

[0043] 2) Synthesis of cobalt tetroxide modified ceria p-n heterojunction photocatalyst;

[0044] 2.1) Mix 0.40 g of the cerium oxide precursor prepared in step (1) with 50 mL of ethanol, and ultrasonicate for 1 hour at a frequency of 40 kHz, so that the cerium oxide precursor is evenly dispersed in the ethanol solution to ...

Embodiment 2

[0050] A p-n heterojunction photocatalyst modified by tricobalt tetroxide and ceria p-n heterojunction, which is basically the same as the p-n heterojunction photocatalyst modified by tricobalt tetroxide in Example 1, the only difference being: the quality of tricobalt tetroxide and ceria in Example 2 The ratio is 0.052:1.

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Abstract

The invention relates to the technical field of functional materials and advanced oxidation, and discloses a preparation method of CeO2 / Co3O4 photocatalyst for activating potassium peroxymonosulfate composite salt under driving of visible light. The preparation method comprises the following steps: 1), 2) and 3). The preparation method has the advantages of green and environment-friendly preparation process, simple preparation process, controllable reaction conditions, low cost and the like. A method comprises following steps: mixing cobaltosic oxide modified cerium dioxide p-n heterojunctionphotocatalyst with an initial ciprofloxacin solution; and then adding a proper amount of PMS and carrying out a photocatalytic reaction under an illumination condition so as to realize effective degradation of ciprofloxacin. The situation that ciprofloxacin is difficult to remove from a water body can be effectively avoided, so that the problems that the catalysis time of catalyst on ciprofloxacinis long, the reagent dosage is large, the photon-generated carrier separation efficiency is low and the stability is poor are effectively solved.

Description

technical field [0001] The invention relates to the technical field of functional materials and advanced oxidation, in particular to CeO activated by visible light-driven potassium hydrogen persulfate compound salt 2 / Co 3 o 4 Preparation method of photocatalyst. Background technique [0002] Ciprofloxacin (CIF), as the third-generation quinolone antibacterial drug, has broad-spectrum antibacterial activity and is widely used in fields such as medical treatment, animal husbandry and aquaculture, but it is difficult to biodegrade in the environment, and a large amount of ciprofloxacin in the environment It is harmful to the human body and the environment. Especially in the water environment, ciprofloxacin can expand its scope of influence through the water cycle, induce bacterial resistance, and cause secondary damage to the human body. However, the current water treatment system is harmful to Its combined effect is relatively general, so it is urgent to find a suitable me...

Claims

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Application Information

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IPC IPC(8): B01J27/053B01J37/34B01J37/08C02F1/72C02F101/38C02F101/34
CPCB01J27/053B01J37/343B01J37/086C02F1/725C02F2101/38C02F2101/34C02F2305/10B01J35/39
Inventor 温小菊申春慧费正皓刘总堂陆茜郭洁
Owner YANCHENG TEACHERS UNIV
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