Copper manganese iron cerium quaternary composite oxide catalyst and its preparation method and application
A composite oxide, copper-manganese technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. The problem of using many reagents and low reusability has achieved the effect of good stability and activity, cheap raw materials, and simple preparation methods
Inactive Publication Date: 2017-05-10
RENMIN UNIVERSITY OF CHINA
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Problems solved by technology
There are many reports on the application of binary metal composite oxides in catalytic oxidation water treatment, but the preparation method is relatively complicated, the process is cumbersome, organic reagents are used more, the reusability is low in application, and the reaction time is long
At present, there is no report on the preparation and application of quaternary composite oxides of transition metals Mn, Fe, Cu and rare earth metal Ce.
Method used
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Embodiment 1
[0038] (1) Weigh 1.22g (0.005mol) Cu(NO 3 ) 2 ·3H 2 O, 1.16mL (0.005mol) Mn(NO 3 ) 2 , 2.06g (0.005mol) Fe(NO 3 ) 3 9H 2 O, 15.36g (0.035mol) Ce(NO 3 ) 3 ·6H 2 O was dissolved in 160mL of ultrapure water, and the molar ratio of copper, manganese, iron and cerium in the resulting solution was 1:1:1:7.
[0039] (2) Weigh 20g of NaOH and dissolve it in water to make up to 250mL of ultrapure water to prepare an aqueous solution of 2mol / L NaOH. Slowly add 2mol / L NaOH aqueous solution dropwise under continuous stirring until the molar ratio of copper element to alkali is 0.005:0.01, the pH of the system is 9-10, and continue to stir for coprecipitation reaction for 2h.
[0040] (3) Centrifuge the above solution, wash the obtained precipitate until the pH is neutral, and dry it in an oven at 110° C. for 12 hours.
[0041] (4) Grinding the dried precipitate with an agate mortar, putting it into a covered crucible, placing it in a muffle furnace for calcination at 450° C. fo...
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The invention discloses a copper-ferromanganese-iron-cerium quaternary composite oxide catalyst as well as a preparation method and application thereof. The copper-ferromanganese-iron-cerium quaternary composite oxide catalyst is prepared by dissolving metal salts of copper, ferromanganese, iron and cerium elements in water, adding an alkali solution for coprecipitation reaction, after the reaction is completed, drying and calcining the obtained precipitate, and naturally cooling to the room temperature, thereby obtaining a copper-ferromanganese-iron-cerium composite oxide, wherein the mole ratio of the copper, ferromanganese, iron and cerium elements is 1:1:1:7. The catalyst disclosed by the invention is high in active component content, high in inactivation resistance, low in raw material price, relatively good in mechanical strength and good in stability and activity in ultrasonic water treatment, and under certain reaction conditions, the removal rate can be up to 87.2% within 30 minutes when the catalyst is adopted to catalyze ultrasonic degradation reaction of diclofenac sodium.
Description
technical field [0001] The invention belongs to the field of catalysts, and relates to a copper-manganese-iron-cerium quaternary composite oxide catalyst and a preparation method and application thereof. Background technique [0002] With the rapid development of the economy, the effective treatment of industrial wastewater, especially high-concentration refractory wastewater, has become a key issue in water treatment in China. This kind of wastewater has high concentration and high toxicity, and it is difficult to achieve standard discharge by conventional processes, causing serious pollution to the water environment. As a new type of efficient wastewater treatment technology, advanced oxidation technology has received extensive attention and research. Ultrasonic irradiation technology is a kind of advanced oxidation technology. It has broad-spectrum oxidation, clean and no secondary pollution, so it has high application potential, but it has the defect of low degradation ...
Claims
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IPC IPC(8): B01J23/889C02F1/36
Inventor 张光明种珊彭猛田慧芳赵鹤刘毓璨张楠王航瑶王园园
Owner RENMIN UNIVERSITY OF CHINA