Preparation method and application of magnesium cobaltate spinel catalyst

A magnesium cobaltate spinel and catalyst technology, which is applied in the field of water treatment, can solve the problems of slow degradation and incomplete degradation of bisphenol A, and achieve the effects of simple production method, complete degradation and simple operation

Inactive Publication Date: 2018-11-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the technical problems of slow bisphenol A reduction and incomplete degradation in existing water treatment, and provides a preparation method and application of a magnesium cobaltate spinel catalyst

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  • Preparation method and application of magnesium cobaltate spinel catalyst

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specific Embodiment approach 1

[0023] Specific embodiment one: the preparation method of a kind of magnesium cobaltate spinel catalyst of present embodiment, specifically carry out according to the following steps:

[0024] 1. Mix pure water with triethylene glycol, then add magnesium acetate and cobalt acetate, mix and stir evenly; then add urea, mix evenly, and obtain a mixed solution;

[0025] 2. Pour the mixed solution into the reaction kettle, then put it into an oven and heat it to a temperature of 160-200°C, and keep it for 5-10 hours to obtain the magnesium cobaltate precursor, then wash it with ultrapure water, and then use ethanol to wash it; then drying in an oven and grinding to obtain a prefabricated powder;

[0026] 3. Put the prefabricated powder obtained in step 2 into a muffle furnace for calcination, then cool and grind to obtain the magnesium cobaltate catalyst prepared by using spinel.

specific Embodiment approach 2

[0027] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the molar ratio of magnesium acetate and cobalt acetate in step one is (1~10):1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the molar weight of urea in step one is 20% of the total molar weight of magnesium acetate and cobalt acetate. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method and application of a magnesium cobaltate spinel catalyst, relates to the field of water treatment and aims at solving the technical problems of low bisphenol-A degradation speed and degradation incompletion existing in existing water treatment. The preparation method comprises the steps: adding triethylene glycol and urea into magnesium acetate and cobaltous acetate serving as raw materials, carrying out a reaction, then, carrying out a hydrothermal method, drying and firing to prepare spinel. The catalyst is simple in preparation method, low in rawmaterial price, good in peroxy-monosulfate catalysis effect, stable in performance and capable of only dissolving out 5-10 mugL<-1> metal ions and completely degrading bisphenol A within 5 min. The magnesium cobaltate spinel catalyst prepared by using the preparation method is used for catalyzing peroxy-monosulfate to remove organic pollutants.

Description

technical field [0001] The invention relates to the field of water treatment. Background technique [0002] The traditional advanced oxidation technology uses OH as the main active substance to degrade pollutants. OH has strong oxidation and non-selectivity, which makes it react with organic matter very quickly, and the oxidation rate constant is mostly at 108M -1 the s -1 ~1010M -1 the s -1 . Persulfate advanced oxidation technology has been developed in recent years with SO 4 ·- A new type of advanced oxidation technology for active species to degrade pollutants, which is a Fenton-like method. The redox potential of persulfate is 1.82V. SO 4 ·- There is a lone pair of electrons in , and its redox potential is close to OH. SO 4 ·- With high redox ability, it can theoretically degrade most organic matter. [0003] Bisphenol A is known for its strong estrogenic activity and is widely used in polycarbonate, epoxy resin, flame retardant, etc. Recently, BPA has be...

Claims

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Application Information

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IPC IPC(8): B01J23/78C02F1/72C02F101/34C02F101/30
CPCB01J23/005B01J23/78C02F1/725C02F2101/30C02F2101/345
Inventor 马军于佳馨徐浩丹汪达甄宇菲李冬何廷堃
Owner HARBIN INST OF TECH
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