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Iron-cobalt bimetal oxyhydroxide and preparing method thereof

A metal hydroxyl and oxide technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve problems such as single species, increase the generation rate and quantity, uniform and dense particles, and particle size distribution. uniform effect

Inactive Publication Date: 2017-04-26
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the types of such catalysts are relatively single, and there are only extensive research and reports on single metal oxyhydroxides.

Method used

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  • Iron-cobalt bimetal oxyhydroxide and preparing method thereof
  • Iron-cobalt bimetal oxyhydroxide and preparing method thereof
  • Iron-cobalt bimetal oxyhydroxide and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare 200mL 0.2655mol / L Fe(NO 3 ) 3 and 0.0345mol / L Co(NO 3 ) 2 Iron-cobalt salt solution, prepare 1mol / L NaOH solution.

[0030] Under the condition of magnetic stirring, the above-prepared NaOH solution was added dropwise into the above-prepared iron-cobalt salt aqueous solution to allow uniform mixing and precipitation. After complete precipitation, adjust the pH to 11, let it stand for 1.5 hours, put it into an incubator for activation for 48 hours, and the activation temperature is 60°C. After standing still, the supernatant was removed, and the obtained precipitate was washed with deionized water until the pH was close to neutral and no longer changed, and the precipitate was dried at 60°C to obtain an iron-cobalt double metal oxyhydroxide (Fe-CoOOH ).

[0031] The obtained iron-cobalt double metal oxyhydroxide is characterized by XRD, such as figure 1 As shown, it shows that the prepared iron-cobalt double metal oxyhydroxide particle is an amorphous struc...

Embodiment 2

[0053] Prepare 200mL 0.2655mol / L Fe(NO 3 ) 3 and 0.0345mol / L Co(NO 3 ) 2 Iron-cobalt salt solution, prepare 1mol / L NaOH solution.

[0054] Under the condition of magnetic stirring, the above-prepared NaOH solution was added dropwise into the above-prepared iron-cobalt salt aqueous solution to allow uniform mixing and precipitation. After complete precipitation, adjust the pH to 10, let it stand for 2 hours, put it into an incubator for activation for 48 hours, and the activation temperature is 60°C. After standing still, the supernatant was removed, and the obtained precipitate was washed with deionized water until the pH was close to neutral and no longer changed, and the precipitate was dried at 70°C to obtain an iron-cobalt double metal oxyhydroxide (Fe-CoOOH ).

Embodiment 3

[0056] Prepare 200mL 0.2655mol / L Fe(NO 3 ) 3 and 0.0345mol / L Co(NO 3 ) 2 Iron-cobalt salt solution, prepare 1mol / L NaOH solution.

[0057] Under the condition of magnetic stirring, the above-prepared NaOH solution was added dropwise into the above-prepared iron-cobalt salt aqueous solution to allow uniform mixing and precipitation. After complete precipitation, adjust the pH to 13, let it stand for 1 hour, put it into an incubator for activation for 38 hours, and the activation temperature is 60°C. After standing still, the supernatant was removed, and the obtained precipitate was washed with deionized water until the pH was close to neutral and no longer changed, and the precipitate was dried at 50°C to obtain an iron-cobalt double metal oxyhydroxide (Fe-CoOOH ).

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Abstract

The invention discloses an iron-cobalt bimetal oxyhydroxide and a preparing method thereof. The preparing method comprises the steps of preparing an iron-cobalt salt aqueous solution and a strong alkaline solution with a certain concentration and certain matching, using a magnetic stirrer to make the mixed salt solution of iron and cobalt be in a power mixed state, gradually dropwise adding the strong alkaline solution into the mixed solution, and continuously stirring to make the stirred solution mixed and precipitated; after fully precipitating, continuing dropwise adding the strong alkaline solution, adjusting the pH value of the suspension liquid to be larger than or equal to 10 (in the preparing process, the control over pH exerts a significant influence on catalytic activity of the catalyst and the generation of the granularity), after conducting still standing for 1-2 hours, putting the solution into an incubator to be subjected to activation for some time; after the activation treatment, using deionized water to wash the precipitate after the activation to be at constant pH, and obtaining the iron-cobalt bimetal oxyhydroxide after drying. The prepared iron-cobalt bimetal oxyhydroxide can further improve the catalytic ability of monometal oxyhydroxide.

Description

technical field [0001] The invention relates to an iron-cobalt double metal oxyhydroxide and a preparation method thereof. Background technique [0002] Ozonation technology uses ozone as an oxidant to react ozone molecules or more intensely oxidizing free radicals with complex organic matter in water through dissolution in water, degrading organic macromolecules into small molecules, or opening ring-shaped molecules and further oxidative degradation process. Because the ozonation water treatment technology has a good effect on treating organic matter and less secondary pollution, the ozonation technology has become a research hotspot in the field of water treatment in recent years. However, when the single ozonation technology is used, the utilization rate of ozone is very low due to the influence of ozone oxidation capacity and mass transfer efficiency, so the degradation efficiency of organic pollutants is also relatively low. Catalytic ozone oxidation technology is an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J37/03C02F1/78C02F101/30
CPCB01J23/75B01J37/031C02F1/725C02F1/78C02F2101/30C02F2305/023
Inventor 徐贞贞谢美玲贲岳王晓凤鲁成秀
Owner SHANDONG NORMAL UNIV