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A kind of porous nano-cobalt-doped zinc manganate spinel catalyst and its preparation method and application

A technology of cobalt zinc manganate and spinel, which is applied in the field of porous nano-cobalt-doped zinc manganate spinel catalyst and its preparation, can solve the problems of strong toxicity and limit the application of Co materials, and achieves large specific surface area and good physical properties. The effect of chemical stability and simple synthesis process

Active Publication Date: 2022-07-12
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transition metal catalysts can activate PMS at room temperature, so they are widely used, among which Co 2+ The activation efficiency of Co is the best, but its toxicity is strong, which limits the application of Co materials.

Method used

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  • A kind of porous nano-cobalt-doped zinc manganate spinel catalyst and its preparation method and application
  • A kind of porous nano-cobalt-doped zinc manganate spinel catalyst and its preparation method and application
  • A kind of porous nano-cobalt-doped zinc manganate spinel catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1.2.5mmol zinc acetate, 2.5mmol manganese acetate and 2.5mmol cobalt acetate and 12mmol citric acid were dissolved in 30ml deionized water and 2.5ml nitric acid to obtain a mixed solution;

[0036] 2. The mixed solution was continuously stirred and heated to 90°C for 8 hours to obtain a viscous gel;

[0037] 3. The gel was placed in an oven at 170°C for 8 hours to remove remaining water, the dried gel was thoroughly ground and annealed in air at 550°C for 7 hours (heating rate: 10°C min. -1 ) to obtain ZnCoMnO 4 Spinel powder.

[0038] figure 1 ZnCoMnO in this example 4 SEM and TEM pictures of the spinel material. Depend on figure 1 It can be seen that ZnCoMnO 4 The surface of the spinel material exhibits a porous structure, which is agglomerated by nanoparticles of 50-100 nm. The porous structure may be due to the combustion of citric acid as a raw material during the annealing stage to generate a large amount of CO 2 , pores are formed when the gas is released...

Embodiment 2

[0040] 1.2.5mmol zinc acetate, 4.5mmol manganese acetate and 0.5mmol cobalt acetate and 16mmol citric acid were dissolved in 30ml deionized water and 1.5ml nitric acid to obtain a mixed solution;

[0041] 4. The mixed solution was continuously stirred and heated to 90°C for 8 hours to obtain a viscous gel;

[0042] 5. The gel was placed in an oven at 170°C for 16 hours to remove remaining water, the dried gel was thoroughly ground and annealed in air at 650°C for 5 hours (heating rate: 10°C min -1 ) to obtain ZnCoMnO 4 Spinel powder.

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Abstract

The invention belongs to the technical field of advanced oxidation, and discloses a porous nano-cobalt-doped zinc manganate (ZnCoMnO 4 ) spinel catalyst and preparation method and application thereof. The catalyst is that zinc acetate, manganese acetate, cobalt acetate and citric acid are dissolved in deionized water and nitric acid to obtain a mixed solution; under stirring conditions, the mixed solution is heated to 80-100 DEG C to obtain a gel; The gel is dried at 150-190 DEG C, and the obtained dry gel is ground and heated to 550-650 DEG C in the air for annealing. The catalyst has a porous structure and good chemical and physical stability catalytic materials, which can activate persulfate to generate SO 4 ‑· and OH·, and then effectively degrade phenol. 4 The spinel catalyst has good reusability and can be used in the field of activated persulfate to degrade phenol.

Description

technical field [0001] The invention belongs to the technical field of advanced oxidation, and more particularly, relates to a porous nano-cobalt-doped zinc manganate (ZnCoMnO 4 ) spinel catalyst and preparation method and application thereof. Background technique [0002] With the rapid economic development, phenolic organic compounds are widely used in petrochemical, pharmaceutical and synthetic fiber industries, producing a large amount of phenol-containing wastewater. Phenolic organic compounds are highly toxic and difficult to be directly biologically treated. At present, the commonly used treatment methods include adsorption, membrane treatment, chemical precipitation and advanced oxidation techniques (AOPs). [0003] Advanced oxidation techniques (OH·-AOPs) based on hydroxyl radical (OH·) induction are frequently investigated for the degradation of even organic pollutants in water, because the OH·-driven oxidation is very rapid and almost non-selective. OH·-AOPs inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J35/10C02F1/72C02F101/34
CPCB01J23/8892B01J23/005B01J35/10B01J35/1004C02F1/722C02F1/725C02F2101/345C02F2305/023C02F2305/02Y02W10/37
Inventor 李磊
Owner GUANGDONG UNIV OF TECH
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