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Method for preparing magnetic nanometer ferroferric oxide-graphene composite catalyst

A composite technology of ferroferric oxide and graphene, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as complex preparation methods, and achieve technological Simple, avoid extra use, and improve the effect of adsorption performance

Active Publication Date: 2012-07-11
HUAWEI TEHCHNOLOGIES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the complex preparation method of the ferroferric oxide-graphene composite catalyst in the prior art, which requires high temperature conditions or the technical problems of using additional reducing agents, and provides a simple method for preparing the magnetic ferroferric oxide-graphene catalyst method

Method used

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  • Method for preparing magnetic nanometer ferroferric oxide-graphene composite catalyst

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Embodiment 1

[0027] Embodiment 1: the preparation method of magnetic ferroferric oxide-graphene catalyst of the present invention, comprises the following steps:

[0028] 1) Preparation of graphite oxide. Graphite oxide is prepared by oxidizing graphite with strong oxidants such as nitric acid and sulfuric acid;

[0029] 2) ultrasonically disperse 20 mg of graphite oxide in 10 mL of ethanol and 10 mL of water mixture for 1 h;

[0030] 3) Stir 0.4663g of ferric chloride hexahydrate and 0.4793g of ferrous sulfate heptahydrate in 20mL of ethanol for 20min;

[0031] 4) mixing and stirring 2) the obtained system and 3) the obtained system;

[0032] 5) After heating the reaction system in 4) to 60°C, add ammonia water to adjust the pH to 9 and react for 3 hours;

[0033] 6) The product of 5) is magnetically separated, washed with deionized water, and vacuum-dried to obtain a magnetic nano-ferric oxide-graphene composite catalyst, and use it to degrade the basic dye methylene blue to measure i...

Embodiment 2

[0035] Embodiment 2: the preparation method of magnetic ferroferric oxide-graphene catalyst of the present invention, comprises the following steps:

[0036] 1) with step one in embodiment 1;

[0037] 2) ultrasonically disperse 40 mg of graphite oxide in 10 mL of ethanol and 10 mL of water mixture for 3 h;

[0038] 3) Stir 0.4663g of ferric chloride hexahydrate and 0.2396g of ferrous sulfate heptahydrate in 45mL of ethanol for 1 hour;

[0039] 4) mixing and stirring 2) the obtained system and 3) the obtained mixture;

[0040] 5) After heating the reaction system in 4) to 50°C, add ammonia water to adjust the pH to 11 and react for 4 hours;

[0041] 6) The product of 5) is magnetically separated, washed with deionized water, and vacuum-dried to obtain a magnetic nano-ferric oxide-graphene composite catalyst, and use it to degrade the basic dye methylene blue to measure its catalytic activity. The experimental results are shown in the table 1.

Embodiment 3

[0042] Embodiment 3: the preparation method of magnetic ferroferric oxide-graphene catalyst of the present invention, comprises the following steps:

[0043] 1) with step one in embodiment 1;

[0044] 2) Ultrasonic dispersion of 20 mg of graphite oxide in 2 mL of ethanol and 10 mL of water mixture for 0.5 h;

[0045] 3) Stir 0.0466g of ferric chloride hexahydrate and 0.1078g of ferrous sulfate heptahydrate in 4mL of ethanol for 10min;

[0046] 4) mixing and stirring 2) the obtained system and 3) the obtained mixture;

[0047] 5) After heating the reaction system in 4) to 90°C, add ammonia water to adjust the pH to 10 and react for 1 hour;

[0048] 7) 6) The product of 5) was subjected to magnetic separation, washed with deionized water, and vacuum-dried to obtain a magnetic nano-ferric oxide-graphene composite catalyst, and used it to degrade the basic dye methylene blue to measure its catalytic activity, the experimental results See Table 1.

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Abstract

The invention relates to a method for preparing a magnetic nanometer ferroferric oxide-graphene composite catalyst, which includes steps of: 1) dispersing graphite oxide in ethanol and water system; 2) respectively mixing soluble trivalent ferric salt and divalent ferric salt in ethanol; 3) mixing and stirring systems obtained in step 1) and step 2); 4) heating reaction system of 3) at temperature of 50 DEG C to 90 DEG C, and adjusting pH to be 9-11 for reaction by adding ammonia water; and 5) performing magnetic separation on products of step 4), washing through deionized water, and obtaining magnetic nanometer ferroferric oxide-graphene composite catalyst. The method provides a simple and practical coprecipitation method for preparing the nanometer ferroferric oxide-graphene composite catalyst which is uniform in particular sizes, even in dispersing and good in magnetism. The nanometer ferroferric oxide-graphene composite catalyst prepared by the method has excellent catalytic activity and is easy in preparing process and environment-friendly.

Description

technical field [0001] The invention relates to a preparation method of a magnetic nanometer ferroferric oxide-graphene composite catalyst. Background technique [0002] As the problem of global environmental degradation becomes increasingly prominent, the effective control and governance of environmental pollution has become a major problem faced and solved by governments all over the world. There are many existing technology applications and environmental pollution control, and the Fenton method is one of them. Fenton's reagent is derived from H 2 o 2 and Fe 2+ A strong oxidizing agent obtained by mixing, especially suitable for the treatment of some refractory or biologically toxic industrial wastewater. by H 2 o 2 -Fe 2+ / Fe 3+ The formed Fenton system requires a low pH value (2-3). After the reaction, a large amount of difficult-to-handle iron-containing precipitates will be formed due to the increase of the pH value, which brings a lot of inconvenience to the s...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J35/10C02F1/72C02F101/38
Inventor 何光裕张艳陈海群纪俊玲施健李丹孙小强汪信
Owner HUAWEI TEHCHNOLOGIES CO LTD
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