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A kind of copper cerium co-doped magnetic composite material and its preparation and application method

A magnetic composite material and co-doping technology, applied in chemical instruments and methods, other chemical processes, oxidized water/sewage treatment, etc., can solve the problem of weakening As(III) adsorption and removal, difficulty in realizing oxidation transformation, and no adsorption Characteristics and other issues, to achieve excellent arsenic adsorption effect, excellent arsenic adsorption performance, and good chemical stability

Active Publication Date: 2019-08-23
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing magnetic materials do not exhibit ideal adsorption characteristics for As(III) in water, and the general adsorption capacity is small, which limits its application.
Moreover, because the existing magnetic materials do not have catalytic activity, it is difficult to realize the oxidation transformation of molecular As(III) to ionic As(V) in solution, which seriously weakens the adsorption and removal of As(III).

Method used

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  • A kind of copper cerium co-doped magnetic composite material and its preparation and application method
  • A kind of copper cerium co-doped magnetic composite material and its preparation and application method
  • A kind of copper cerium co-doped magnetic composite material and its preparation and application method

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: Preparation of copper-doped magnetic composite material:

[0030] 1.35g FeCl 3 ·6H 2 O, with 0.427g CuCl 2 2H 2 O Add 36mL of ethylene glycol solution, ultrasonically dissolve the solid metal salt, mix evenly, then add 3.6g of anhydrous sodium acetate, stir vigorously for 30min, then transfer to an autoclave at 200°C for 6h; after cooling to room temperature, magnetic Separate, wash, and dry at 60°C for 6 hours to obtain a copper-doped magnetic composite material. The resulting product was characterized by SEM and TEM, see respectively figure 1 (a) and figure 2 (a).

Embodiment 2

[0032] 1.35g FeCl 3 ·6H 2 O, 0.427g CuCl 2 2H 2 O with 0.093g CeCl 3 ·7H 2 0. Add 36mL ethylene glycol solution, ultrasonically dissolve the solid metal salt, mix evenly (the initial copper ion to cerium ion molar ratio is 10:1), then add 3.6g anhydrous sodium acetate, stir vigorously for 30min, then turn to React in a high-pressure reactor at 200°C for 6h; cool to room temperature, magnetically separate, wash, and dry at 60°C for 6h to obtain a copper-cerium co-doped magnetic composite material. The resulting product was characterized by SEM and TEM, see respectively figure 1 (b) and figure 2 (b).

Embodiment 3

[0034] 1.35g FeCl 3 ·6H 2 O, 0.427g CuCl 2 2H 2 O with 0.186g CeCl 3 ·7H 20 Add 36mL of ethylene glycol solution, ultrasonically, fully dissolve the metal salt solid, mix evenly (the initial copper ion to cerium ion molar ratio is 5:1), then add 3.6g of anhydrous sodium acetate, stir vigorously for 30min, then turn to React in a high-pressure reactor at 200°C for 6h; cool to room temperature, magnetically separate, wash, and dry at 60°C for 6h to obtain a copper-cerium co-doped magnetic composite material. And carry out SEM and TEM characterization to the product of gained, see respectively figure 1 (c) and figure 2 (c).

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Abstract

The invention belongs to the technical field of water treatment and particularly relates to a copper-cerium co-doped magnetic composite material, a preparation method thereof and application of the material in water body arsenic removal. Iron salt, copper salt and cerium salt serve as the raw materials, sodium acetate serves as an alkaline source, ethylene glycol serves as a solvent, and the copper-cerium co-doped magnetic composite material is synthesized through the solvothermal method. Dual-metal doped magnetic composite materials with different sizes and specific surface areas are obtained by regulating the molar ratio of doped copper metal to cerium metal salt. The preparation method has the advantages of being low in cost, simple in process, excellent in arsenic adsorption, capable of achieving magnetic separation easily and the like, and plays an important role in solving arsenic pollution in water bodies.

Description

technical field [0001] The invention belongs to the technical field of magnetic composite material synthesis and water treatment, and in particular relates to a copper-cerium co-doped magnetic composite material, a preparation method thereof, and an application method of using it for the adsorption of trivalent arsenic in water bodies. Background technique [0002] Arsenic in water mainly exists in the form of As(V) and As(III). Among them, the toxicity of As(III) is much higher than that of As(V), about 60 times, and As(III) is usually in a molecular state, which is easier to migrate and difficult to remove. Moreover, most of the existing arsenic removal technologies have a good removal effect on As(V), but are very limited and poor on As(III). Therefore, how to effectively control arsenic pollution, especially trivalent arsenic, has attracted people's attention. [0003] In recent years, due to their high surface energy and specific surface area, nano-magnetic materials ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06C02F1/28C02F1/72B01J20/30C02F101/10
Inventor 王海鹰宋婷婷彭兵柴立元杨卫春史美清杨志辉唐崇俭刘恢李青竹
Owner CENT SOUTH UNIV
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