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Preparation method for nonmetallic element-doped MxFe3-xO4@TiO2 magnetic composite material

A technology of mxfe3-xo4tio2 and magnetic composite materials, which is applied in the preparation of MxFe3-xO4TiO2 magnetic composite materials and the preparation of non-metallic element doped MxFe3-xO4TiO2 magnetic composite materials, which can solve the problem of weak stability and insufficient regeneration ability of composite materials to achieve excellent photocatalytic activity, improve recycling rate, and broaden the photoresponse range

Active Publication Date: 2015-06-17
安徽皖瑞能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] These reported preparation methods usually have many steps, and the prepared materials need to be calcined at a high temperature in a specific atmosphere. The stability of the composite material is not strong, and there are defects such as insufficient regeneration ability.

Method used

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  • Preparation method for nonmetallic element-doped MxFe3-xO4@TiO2 magnetic composite material
  • Preparation method for nonmetallic element-doped MxFe3-xO4@TiO2 magnetic composite material
  • Preparation method for nonmetallic element-doped MxFe3-xO4@TiO2 magnetic composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Weigh 10mmol Zn(CH 3 COO) 2 2H 2 O(AR) and 20mmol Fe(NO 3 ) 3 9H 2 Dissolve O(AR) in 100mL of ethanol (AR) solution with 2.5g of polyvinylpyrrolidone dissolved, magnetically stir and mix evenly, slowly add 30mL of aqueous solution dissolved with 0.5mol NaOH, adjust the pH, stir for 1h and mix evenly to obtain a mixed solution; Put the mixed solution into a double-chamber polytetrafluoroethylene-lined stainless steel reaction kettle, seal it under high pressure at 180°C for 20 hours, and then cool it naturally to room temperature; magnetically separate the reactants and wash them with ethanol for several times until they are neutral to obtain magnetic Zn x Fe 3-x o 4 nanoparticles.

[0025] (2) Weigh 0.5mmol magnetic Zn x Fe 3-x o 4 Nanoparticles were dispersed in 40mL ethanol dissolved with 0.05mmol urea, and ultrasonically treated for 10 hours; 10mL ethanol solution dissolved with 0.5mmol n-butyl titanate (AR) was slowly added dropwise to the turbid solut...

Embodiment 2

[0032] The preparation method of this embodiment is the same as that of Example 1, the difference is only: in the synthesis of magnetic Zn x Fe 3-x o 4 The surfactant used for nanoparticles is 2.5g polyvinyl alcohol, and the lye used is ammonia water / NH 4 HCO 3 In the aqueous solution, the titanium salt used is titanium tetrachloride, and the step (2) is to react in a stainless steel reactor at 200° C. for 10 hours to obtain the target product.

[0033] In the same manner as in Example 1, the photocatalytic oxidation performance of the composite material obtained in this example was tested, and the removal rate of Rhodamine B was 98%.

Embodiment 3

[0035] The preparation method of this embodiment is the same as that of Example 1, the only difference is that the water-soluble metal M 2+ Salt selection Co(CH 3 COO) 2 4H 2 O(AR), and Fe(NO 3 ) 3 9H 2 O(AR) was dissolved in ethanol and mixed evenly with magnetic stirring to prepare magnetic Co x Fe 3-x o 4 Nanoparticles, finally made N element doped Co x Fe 3-x o 4 TiO 2 magnetic composites.

[0036] In the same manner as in Example 1, the photocatalytic oxidation performance of the composite material obtained in this example was tested, and the removal rate of Rhodamine B was 99%.

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Abstract

The invention discloses a preparation method for a nonmetallic element-doped MxFe3-xO4@TiO2 magnetic composite material. A double-cavity polytetrafluoroethylene-lining stainless steel reaction kettle is used for synthesizing the target composite material under high temperature and high pressure. The method comprises the following steps: taking water-soluble metallic M<2+> salt, Fe<3+> salt, titanium salt and inorganic nonmetallic salt as raw materials, and stirring and dissolving M<2+> salt, Fe<3+> salt and a surfactant into an ethanol solution, and synthesizing magnetic MxFe3-xO4 nano-particles under an alkaline condition by virtue of a solvothermal method; ultrasonically dispersing and uniformly mixing the MxFe3-xO4 nano-particles, nonmetallic salt and titanium salt in the ethanol solution, performing reaction for 8 to 15 hours by adopting a high-temperature high-pressure vapor-thermal method, and performing separation, washing, drying and grinding to obtain the target product. The composite material is doped with nonmetallic elements, so that the photoeffect wavelength response range of TiO2 can be widened; by MxFe3-xO4, the forbidden bandwidth of TiO2 can be effectively reduced; in addition, by the magnetic property, the catalytic material can be efficiently recycled; the whole preparation method is simple in flow, and has the advantages of safety, high efficiency, low cost, environment friendliness and the like.

Description

technical field [0001] The present invention relates to a M x Fe 3-x o 4 TiO 2 The preparation method of magnetic composite material relates to a kind of nonmetallic element doping M in particular x Fe 3-x o 4 TiO 2 The invention relates to a preparation method of a magnetic composite material, which belongs to the technical field of photocatalytic material preparation. Background technique [0002] With the rapid development of social economy, environmental pollution has increasingly become the focus of social attention, among which the pollution of organic wastewater to water environment is particularly prominent. Treating organic dyes by developing products with adsorption and photocatalytic properties is an effective way to solve such environmental pollution problems. [0003] Nano-semiconductor materials, such as anatase phase TiO 2 As an important photocatalytic material, it is widely used in the field of organic pollutant treatment such as dyes, and it is one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J23/75B01J23/745B01J27/135B01J27/02
Inventor 姚运金秦家成陈浩魏凤玉蔡云牧卢芳
Owner 安徽皖瑞能源科技有限公司
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