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Nano heterogeneous Fenton catalyst with alginate core coated with copper/magnetic Fe3O4 and preparation method of Nano heterogeneous Fenton catalyst

An alginate and outer coating technology is applied in the field of heterogeneous Fenton catalyst and its preparation, which can solve the problems of loss, difficult separation of catalyst ions, etc., and achieves increased oxidation capacity, reduced Fenton mud, and good biological phase. Capacitive and Environmentally Friendly Effects

Active Publication Date: 2016-06-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention is to solve the technical problems of strict pH requirement of the existing homogeneous Fenton catalyst, difficult separation and loss of catalyst ions, and proposes an alginate core coated copper / magnetic Fe 3 o 4 Nano heterogeneous Fenton-like catalyst and preparation method thereof

Method used

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  • Nano heterogeneous Fenton catalyst with alginate core coated with copper/magnetic Fe3O4 and preparation method of Nano heterogeneous Fenton catalyst
  • Nano heterogeneous Fenton catalyst with alginate core coated with copper/magnetic Fe3O4 and preparation method of Nano heterogeneous Fenton catalyst
  • Nano heterogeneous Fenton catalyst with alginate core coated with copper/magnetic Fe3O4 and preparation method of Nano heterogeneous Fenton catalyst

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specific Embodiment approach 1

[0021] Specific implementation mode 1: the alginate core of the present embodiment is coated with copper / magnetic Fe 3 o 4 The nano-heterogeneous Fenton-like catalyst is based on sodium alginate as the core, and the core is coated with Fe 3 o 4 Magnetic nanoparticles and spherical particles of copper chloride, the particle size is 1 to 1.5 mm, Fe 3 o 4 The particle diameter of the magnetic nanoparticles is 15-35 nanometers.

specific Embodiment approach 2

[0022] Specific embodiment two: Alginate core outer coating copper / magnetic Fe described in specific embodiment one 3 o 4 The preparation method of the nanometer heterogeneous Fenton-like catalyst is carried out in the following steps:

[0023] 1. Mix the ferrous salt and the ferric salt according to the molar ratio of 1: (2~3), then heat up to 30~70°C, and add an alkali solution with a concentration of 1~5mol / L under stirring conditions as Precipitant, stirring and reacting for 1 to 1.5 hours, static precipitation, removing the supernatant, washing the precipitate with ultrapure water until the pH is neutral, and then ultrasonically dispersed for 5 to 10 minutes, then transferred to a sample bottle for storage, and obtained Magnetic nano-Fe 3 o 4 Dispersions;

[0024] Two, the sodium alginate solution is added to the magnetic nano-Fe prepared in step one 3 o 4 In the dispersion liquid and mixed uniformly, it is prepared into a suspension slurry;

[0025] 3. Add the sus...

specific Embodiment approach 3

[0026] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the ferrous salt and the ferric salt are sulfate, chloride or phosphate. Others are the same as in the second embodiment.

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Abstract

The invention relates to a nano heterogeneous Fenton catalyst with an alginate core coated with copper / magnetic Fe3O4 and a preparation method of the Nano heterogeneous Fenton catalyst. The invention relates to a heterogeneous Fenton catalyst and a preparation method thereof, which aims at solving the technical problems of the existing homogenous Fenton catalyst that the requirement on pH is high, and the catalyst ions are difficult to separate and likely to lose. The catalyst is formed by adopting sodium alginate as a core and coating the core with Fe3O4 nano particles and spherical particles of copper chloride. The preparation method comprises the following steps: I, adding a precipitant into a ferrous salt and ferric salt solution, washing precipitates, and then dispersing the precipitates to obtain a magnetic nano Fe3O4 dispersed solution; II, adding a sodium alginate solution into the dispersed solution, and uniformly mixing to prepare suspension slurry; and III, dropwise adding the suspension slurry into a copper chloride solution, carrying out the stationary reaction, separating, and drying to obtain the nano heterogeneous Fenton catalyst with the alginate core coated with the copper / magnetic Fe3O4. The nano heterogeneous Fenton catalyst can be applied to the water treatment.

Description

technical field [0001] The invention relates to a heterogeneous Fenton catalyst and a preparation method thereof. Background technique [0002] Fenton technology is a kind of advanced oxidation technology, mainly composed of Fe 2+ and H 2 o 2 Fenton's reagent reacts under acidic conditions (reaction (1)) to generate free radicals with strong oxidizing effects, such as OH and so on. (·OH oxidation potential 2.8V, second only to fluorine oxidation potential 2.87V). These strong oxidizing free radicals can non-selectively oxidize organic matter, so as to achieve the purpose of efficient removal of organic matter. Cu exhibits similar redox properties to Fe, and Cu + and Cu 2+ Both valence states are easily compatible with H 2 o 2 react to produce HO and HO respectively 2 ·(Reactions (2) and (3)), the biggest difference between Cu and Fe is that Fe 3+ Hydrate [Fe(H 2 O)6] 3+ Insoluble in water at pH>5, while Cu 2+ Hydrate [Cu(H 2 O) 6 ] 2+ Predominates at neutr...

Claims

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Application Information

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IPC IPC(8): B01J31/28B01J23/745C02F1/28C02F1/72C02F101/34C02F101/38
CPCC02F1/286C02F1/722C02F1/725C02F2101/308C02F2305/026
Inventor 邱珊邓凤霞杨基先徐善文杨乐
Owner HARBIN INST OF TECH
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