A magnetic type Fantaton catalyst and its preparation methods and applications
A catalyst, Fenton's technology, applied in the field of magnetic Fenton-like catalysts and its preparation, can solve problems such as easy oxidation and agglomeration, and achieve the effects of saving production costs, mild reaction conditions, and saving processing costs
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Embodiment 1
[0021] Example 1: Preparation and application of magnetic Fenton catalyst.
[0022] (1) Dissolve 278mg of ferrous sulfate in 5ml of water ultrasonically, stir and heat to 60°C, then add dropwise ammonia water with a mass concentration of 25% until a black precipitate is produced, and continue to stir at constant temperature for 1 hour to obtain mixture A;
[0023] (2) Add 0.2ml (186mg) of tetraethylorthosilicate to the mixture A obtained in step (1), sonicate until the system is in an emulsion state, then add an equal volume of ethanol and stir at room temperature for 4 hours to obtain a mixture B;
[0024] (3) Disperse 50 mg of graphite oxide ultrasonically in 100 ml of water / ethanol mixture (1:1, v / v), centrifuge the supernatant and add it to the mixture B obtained in step (2), stir and heat to At 60° C., the ammonia water with a mass concentration of 25% was added dropwise, the pH value was adjusted to 10, and the constant temperature stirring was continued for 3 hours. After suct...
Embodiment 2
[0026] Example 2: Preparation and application of magnetic Fenton catalyst.
[0027] (1) Dissolve 417mg of ferrous sulfate in 5ml of water ultrasonically, stir and heat to 60°C, then add dropwise ammonia water with a mass concentration of 20% until a black precipitate is produced, and continue to stir at constant temperature for 1 hour to obtain mixture A;
[0028] (2) Add 0.3ml (279mg) of tetraethylorthosilicate to the mixture A obtained in step (1), sonicate until the system becomes an emulsion, then add an equal volume of ethanol and stir at room temperature for 3h to obtain a mixture B;
[0029] (3) Disperse 60 mg of graphite oxide ultrasonically in 100 ml of water / ethanol mixture (5:1, v / v), centrifuge the supernatant and add it to the mixture B obtained in step (2), stir and heat to At 80°C, ammonia water with a mass concentration of 20% was added dropwise, the pH value was adjusted to 9, and the constant temperature stirring was continued for 2 hours, and the magnetic Fenton ca...
Embodiment 3
[0031] Example 3: Preparation and application of magnetic Fenton catalyst.
[0032] (1) Dissolve 556mg of ferrous sulfate in 5ml of water ultrasonically, stir and heat to 50°C, then add dropwise ammonia water with a mass concentration of 25% until a black precipitate is produced, continue to stir at constant temperature for 2h to obtain mixture A;
[0033] (2) Add 0.3ml (279mg) of tetraethylorthosilicate to the mixture A obtained in step (1), sonicate until the system is in the form of an emulsion, then add an equal volume of ethanol and stir at room temperature for 4h to obtain a mixture B;
[0034] (3) Disperse 50 mg of graphite oxide ultrasonically in 100 ml of water / ethanol mixture (10:1, v / v), centrifuge the supernatant and add it to the mixture B obtained in step (2), stir and heat to 80 ℃, then add dropwise ammonia water with a mass concentration of 25%, adjust the pH value to 11, continue to stir at constant temperature for 3 hours, filter, wash and vacuum dry to obtain a mag...
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