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Synthesis method of nano magnetic hydroxyl iron oxide ozone catalyst with core-shell structure

A technology of iron oxyhydroxide and nano-magnetic technology, applied in the direction of iron oxide/iron hydroxide, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve secondary pollution, iron oxyhydroxide catalyst Difficult to recycle, difficult to apply and other problems, to achieve the effect of increasing the production rate and quantity, simple preparation, and high catalytic activity

Inactive Publication Date: 2014-08-13
HEILONGJIANG ACAD OF SCI INST OF NATURAL RESOURCES
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  • Summary
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that iron oxyhydroxide catalyst is difficult to recycle, easy to cause secondary pollution and difficult to apply in practical engineering, and to provide a synthesis method of nano-magnetic iron oxyhydroxide ozone catalyst with core-shell structure

Method used

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  • Synthesis method of nano magnetic hydroxyl iron oxide ozone catalyst with core-shell structure
  • Synthesis method of nano magnetic hydroxyl iron oxide ozone catalyst with core-shell structure
  • Synthesis method of nano magnetic hydroxyl iron oxide ozone catalyst with core-shell structure

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specific Embodiment approach 1

[0017] Specific embodiment one: the synthesis method of the core-shell structure nano-magnetic iron oxyhydroxide ozone catalyst of this embodiment is carried out according to the following steps:

[0018] 1. Prepare an iron salt solution with an iron ion molar concentration of 0.5mol / L to 2mol / L, and then add additives to make the molar concentration of the additives 0.01mol / L to 0.03mol / L to obtain a mixed solution A;

[0019] 2. Under the condition that the temperature is 20°C to 30°C, titrate the mixed solution A obtained in step 1 with an alkali solution with a molar concentration of 0.5mol / L to 2mol / L until the pH value of the mixed solution A is 9 to 12, and obtain Suspension, after standing for 10min to 30min, activated at 40°C to 80°C for 6h to 12h under nitrogen protection, then ultrasonically dispersed for 10min to 20min, and then added tetrachloride with a molar concentration of 0.1mol / L to 0.5mol / L Ethoxysilane, magnetically stirred at a speed of 120r / min to 300r / m...

specific Embodiment approach 2

[0024] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the iron salt solution described in step one is a ferrous salt solution or a mixed solution of a ferrous salt and a ferric salt, wherein the ferrous The molar ratio of ferrous ions to ferric ions in the mixed solution of salt and ferric salt is 1: (2-3.5). Others are the same as in the first embodiment.

specific Embodiment approach 3

[0025] Specific embodiment three: this embodiment is different from specific embodiment one or two in that: the ferrous salt is ferrous chloride or ferrous sulfate, and the ferric salt is ferric nitrate, ferric sulfate or ferric chloride . Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a synthesis method of nano magnetic hydroxyl iron oxide with a core-shell structure, and in particular relates to a synthesis method of a nano magnetic hydroxyl iron oxide ozone catalyst with a core-shell structure, aiming at solving the problems that the hydroxyl iron oxide catalyst is difficult to recover, easily causes secondary pollution and is hard to be applied to practical engineering. The method comprises the steps of 1, preparing a ferric salt solution, and feeding an auxiliary agent into the ferric salt solution; 2, feeding tetraethoxy-silicane; 3, soaking solid phase matter B into trivalent iron salt solution; 4, preparing the nano magnetic hydroxyl iron oxide with the core-shell structure. The nano magnetic hydroxyl iron oxide with the core-shell structure has the advantages of being large in specific surface area, good in magnetic property, easy to separate, high in catalytic activity and easy to prepare; furthermore, the magnetic hydroxyl iron oxide with the core-shell structure is capable of promoting the decomposition of ozone to generate hydroxyl radicals, so that the generation rate and number of free radicals in water can be increased. The synthesis method is used for synthesizing the nano magnetic hydroxyl iron oxide ozone catalyst with the core-shell structure.

Description

technical field [0001] The invention relates to a synthesis method of nano-magnetic iron oxyhydroxide with a core-shell structure, and belongs to the technical field of advanced treatment of drinking water. Background technique [0002] With the rapid development of industry and the improvement of human material living standards, the types of organic pollutants in water tend to be diversified. Some refractory toxic and harmful pollutants, although low in concentration, are harmful and difficult to remove. Traditional treatment processes cannot effectively remove these toxic and harmful micro-pollutants, which directly threaten the safety of urban water supply. In the field of water treatment, nano-metal oxide catalyzed ozonation technology has become a current research hotspot because of its high-efficiency oxidation performance and simple catalyst preparation. Ferric oxyhydroxide exists widely in nature and has stable chemical properties, high specific surface area and fin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C01G49/02C02F1/78
Inventor 袁磊倪红伟陈忠林沈吉敏张继舟王立民吕品
Owner HEILONGJIANG ACAD OF SCI INST OF NATURAL RESOURCES
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