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Catalyst preparation method for efficiently catalyzing organic pollutant in ozone oxidation water

A technology of ozone oxidation and catalyst, which is applied in the research of catalytic ozonation of organic pollutants in water, and the preparation of mesoporous zirconia-supported nano-manganese oxide catalyst, which can solve the problems of poor effect and serious metal dissolution.

Inactive Publication Date: 2009-03-18
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology

These catalysts generally have good catalytic effect under acidic conditions, but the phenomenon of metal dissolution is serious, and the effect is often not good under neutral pH conditions.

Method used

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  • Catalyst preparation method for efficiently catalyzing organic pollutant in ozone oxidation water
  • Catalyst preparation method for efficiently catalyzing organic pollutant in ozone oxidation water

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Embodiment Construction

[0011] The technical characteristics and advantages of the present invention can be seen through the embodiments and application examples given below.

[0012] 1. MnO X / ZrO 2 Structural Properties of Catalysts

[0013] The preparation of the catalyst adopts the equal-volume impregnation method. A certain amount of manganese acetate is added to deionized water, and then a certain amount of mesoporous zirconia is added to the solution to make MnO X / ZrO 2 Medium Mn (as MnO 2 Calculation) percentage is 1-15wt%, impregnated at room temperature for 0.5-6 hours, the obtained system is dried in an oven at 100-140°C for 1-6 hours, then washed with deionized water, and then dried at 100-140°C for 1 hour -6 hours, and finally calcined the obtained powder at 300-500°C for 2-6 hours to obtain MnO X / ZrO 2 sample. In order to compare the superiority of the catalyst prepared by the present invention, the same preparation method was adopted with mesoporous zirconia and commercially a...

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Abstract

The invention provides a preparation method used for catalyzing ozone oxidation catalyst MnO / ZrO2; the preparation of the catalyst adopts an isovolumetric impregnation method and adds manganous acetate of a certain quantity into a deioned water; subsequently, mesopore zirconia is added into the solution so as to lead the weight percentage of Mn in Mn / ZrO2 (measured by MnO2) is 1-15wt% and dipped for 0.5-6 hours under room temperature, thus gaining a system which is subsequently dried for 1-6 hours in an oven at the temperature of 100-140 DEG C; subsequently, the system is washed by the deioned water and dried for 1-6 hours at the temperature of 100-140 DEG C so as to gain the powder; the power is calcined for 2-6 hours at the temperature of 300-500 DEG C so as to gain sample MnOX / ZrO2, thus gaining highly dispersed nanometer manganese oxides. The catalyst has extremely high ozone catalysis activity under acid and neutral conditions and can completely mineralize 2, 4-Dichlorophenoxyethanoic acid.

Description

technical field [0001] The invention relates to a method for developing a catalyst for catalyzing ozone oxidation, in particular to a method for preparing a mesoporous zirconia-loaded nano-manganese oxide catalyst and research on catalytic ozonation of organic pollutants in water. Background technique [0002] Ozone has received extensive attention in the field of water treatment in recent years due to its strong oxidizing and disinfecting capabilities. Although ozone can oxidize many refractory organic substances in water, there are also some shortcomings, which limit the application of ozone in actual water treatment technology, such as: the solubility of ozone in water is low and easy to decompose, and the reaction selectivity with organic substances is poor, And it is not easy to completely decompose organic matter into CO 2 and H 2 O. The utilization rate of ozone and the degradation efficiency of organic pollutants are relatively low in simple ozonation, so catalyti...

Claims

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Application Information

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IPC IPC(8): B01J23/34C02F1/78
Inventor 胡春邢胜涛
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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