Preparation method of ferroferric oxide coated diamond Fenton-like catalyst

A technology of triiron tetroxide and diamond is applied in the field of preparation of Fenton-like catalysts, which can solve the problems of unrecyclable catalysts, human and animal teratogenic and carcinogenic, and complex dye structures, so as to reduce secondary pollution and reduce red mud. The effect of simple production, preparation and processing

Active Publication Date: 2020-11-10
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The treatment of dye wastewater is a major problem that restricts industrial development. Due to the complex structure of dyes and the toxicity of teratogenic and carcinogenic to humans and animals, industrial wastewater urgently needs to adopt effective methods to remove dyes in wastewater. At present, the most commonly used method is the Fenton method. However, when Fenton technology uses ferrous ions to treat wastewater, it is easy to produce a large amount of red mud and other by-products, and the catalyst cannot be recycled, which limits its wide application.

Method used

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  • Preparation method of ferroferric oxide coated diamond Fenton-like catalyst
  • Preparation method of ferroferric oxide coated diamond Fenton-like catalyst
  • Preparation method of ferroferric oxide coated diamond Fenton-like catalyst

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Effect test

Embodiment a

[0043] According to Document 1, in Document 1, Fe was synthesized by adding NaAC 3 o 4 Microspheres, simple optimization is carried out in this embodiment, no reactant such as NaAC is needed, and Fe 3 o 4 The microspheres are coated on the diamond surface, and the specific implementation steps are: FeCl 3 ·6H 2 O and oleic acid (according to every milliliter of oleic acid add 30mg FeCl 3 ·6H 2 O ratio), add 18ml ethanol after fully dissolving, after stirring at room temperature, add 250mg diamond (diamond and FeCl 3 ·6H 2 O mass ratio is about 8:1) after stirring for 10 minutes, transfer to the reactor, and react at 140°C for 16h. Gradient cooling at a cooling rate of 20°C / h, 60°C each time, and keep for 0.5h after each cooling down, take out the reactor after dropping to 25-30°C, filter, and wash with ethanol and deionized water in turn , after drying, the test obtained coated Fe 3 o 4 Microspheres of diamond samples.

[0044] The above literature 1 is Xi G, Yue B,...

Embodiment b

[0046] FeCl 3 ·6H 2 O and oleic acid (according to every milliliter of oleic acid add 70mg FeCl 3 ·6H 2 O ratio), add 18ml ethanol after fully dissolving, after stirring at room temperature, add 250mg diamond (diamond and FeCl 3 ·6H 2 O mass ratio is 3.5:1), stirred for 10 minutes, transferred to the reactor, and reacted at 180°C for 16h. Carry out gradient cooling at a cooling rate of 20°C / h, 60°C each time, and keep it for 0.5h after each drop to 25-30°C, take out the reactor after cooling, filter, and wash with ethanol in turn, remove After washing with ion water and drying, the coated Fe 3 o 4 Microspheres of diamond samples.

Embodiment c

[0048] FeCl 3 ·6H 2 O and oleic acid (according to every milliliter of oleic acid add 50mg FeCl 3 ·6H 2 O ratio), after fully dissolving, add 18ml ethanol, after stirring at room temperature, add 150mg diamond (diamond and FeCl 3 ·6H 2 O mass ratio is 3:1) after stirring for 10 minutes, transferred to the reactor, and reacted at 180°C for 16h. Carry out gradient cooling at a cooling rate of 20°C / h, 60°C each time, and keep it for 0.5h after each drop to 25-30°C, take out the reactor after cooling, filter, and wash with ethanol in turn, remove After washing with ion water and drying, the coated Fe 3 o 4 Microspheres of diamond samples, while Fe 3 o 4 The coating rate of the microspheres on the diamond surface is less than 50%.

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Abstract

The invention discloses a preparation method of a ferroferric oxide coated diamond Fenton-like catalyst, which comprises the following steps: (1) sequentially carrying out dilute hydrochloric acid impurity removal, water washing and ethanol ultrasonic cleaning on diamond, and washing with water until the diamond is neutral to obtain impurity-removed diamond; (2) sequentially carrying out dilute nitric acid treatment and water washing on the impurity-removed diamonds to obtain clean diamonds; and (3) adding FeCl3. 6H2O and oleic acid into the reaction kettle, completely dissolving, adding ethanol, adding clean diamond, reacting, carrying out gradient cooling after the reaction is finished, cleaning and drying to obtain Fe3O4 microsphere coated diamond powder, namely the Fenton-like catalyst. In the application, in order to coat the surface of the diamond with the iron oxide, the surface of the diamond is firstly cleaned and activated to be more easily combined with the metal oxide, andthen the surface of the diamond is coated with the metal oxide by adopting a solvothermal reaction, so that the surface of the diamond is coated with the iron oxide.

Description

technical field [0001] The invention relates to a preparation method of a Fenton-like catalyst coated with diamond by ferric iron tetroxide. Background technique [0002] The treatment of dye wastewater is a major problem that restricts industrial development. Due to the complex structure of dyes and the toxicity of teratogenic and carcinogenic to humans and animals, industrial wastewater urgently needs to adopt effective methods to remove dyes in wastewater. At present, the most commonly used method is the Fenton method. However, when Fenton technology uses ferrous ions to treat wastewater, it is easy to produce a large amount of red mud and other by-products, and the catalyst cannot be recycled, which limits its wide application. As the hardest substance in nature, diamond is widely used due to its unique physical and chemical properties, such as stable chemical properties, high hardness, wear resistance, and high thermal conductivity. Secondly, as a functional carbon mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J35/10C02F1/72C02F101/30
CPCB01J23/745B01J35/1004C02F1/72C02F2101/308C02F2101/40
Inventor 郭文秀于振涛
Owner NANJING UNIV
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