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Preparation method of magnetically separable photocatalyst nano-eu3+-cofe2o4 powder

A -cofe2o4, nanophotocatalyst technology, applied in the field of aromatic ring organics methyl orange, can solve the problems of high photochemical stability, low purity of nanomaterials, easy to be recycled and so on

Active Publication Date: 2016-01-20
JIANGSU RONGCHANG NEW MATERIAL TECH +1
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Problems solved by technology

[0004] The purpose of the invention is to overcome the photocatalyst TiO 2 Difficult to recover, general ferrite has weak magnetic properties, and the preparation of nanomaterials has the disadvantages of low purity. The present invention adopts the sol-gel method using propylene glycol as a solvent and a complexing agent to prepare Eu 3+ -CoFe 2 o 4 Nanoparticle catalyst, due to its small band gap, high photochemical stability, and low consumption, it is used to catalyze the degradation of methyl orange under solar light, and the degradation rate is close to 99.51%. The catalyst is easy to be recycled

Method used

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  • Preparation method of magnetically separable photocatalyst nano-eu3+-cofe2o4 powder
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  • Preparation method of magnetically separable photocatalyst nano-eu3+-cofe2o4 powder

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Embodiment Construction

[0016] Further describe the present invention below in conjunction with accompanying drawing and experiment:

[0017] The present invention adopts the JEM-2010 transmission electron microscope, which can prove that the prepared sample is a nanometer powder, and uses SQUID-VSM to test CoFe 2 o 4 -E u 3+ Hysteresis loop.

[0018] This embodiment is achieved through the following technical solutions:

[0019] (1) Add 0.01molCo(NO 3 ) 2 ·6H 2 O, 0.02molFe(NO 3 ) 3 9H 2 O and 0.0005molEu(NO 3 ) 3 ·6H 2 O was dissolved in 25ml of propylene glycol to form a reddish-brown solution. Add 25ml of deionized water to the prepared solution as a solvent, heat to 80°C and stir vigorously to form a transparent sol;

[0020] (2) After the stirring is completed, put the obtained product in an oven for 24 hours at 110°C to obtain a xerogel;

[0021] (3) The obtained xerogel was ground into powder in a mortar, baked in a muffle furnace at 600°C for 2 hours, and then baked at 800°C fo...

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Abstract

The invention relates to a preparation method of magnetically separable photocatalyst nano Eu<3+>-CoFe2O4 powder. Nano magnetic Eu<3+>-CoFe2O4 powder and CoFe2O4powder are prepared by a sol-gel method, existence of the characteristic peak of CoFe2O4, which is characterized by use of an X ray diffraction instrument and transmission electron microscopy proves that sample particle size is about 30nm. SQUID (superconducting quantum interference device) VSM (vibrating sample magnetometer) magnetic measurement shows that saturation magnetization intensity and coercive force of a sample are increased significantly while increasing of doped europium. By 90min of illumination of Eu<3+>-CoFe2O4 on organic dye methyl orange by a 500W xenon lamp, the degradation rate of a methyl orange solution reaches 99.51%, and a catalyst is easy to recycle by a magnetic material. Nanocrystal synthesized by the preparation method has the advantages of strong magnetism, high photo catalytic efficiency, easy recovery and the like; and the preparation method has the advantages of low raw material cost, zero emissions, andutilization of solar energy, and is convenient for industrial production.

Description

technical field [0001] The invention relates to the preparation of an easily recyclable photocatalytic nano-magnetic material, which has high catalytic efficiency under sunlight, is suitable for the degradation of various organic pollutants, and is especially suitable for the field of methyl orange, an aromatic ring organic substance. Background technique [0002] Photocatalytic oxidation of organic matter to decompose it into small molecules, so as to remove its pollution to the environment, is a popular research topic in recent decades. Sun Dongfeng prepared cobalt ferrite nanoparticles by chemical co-precipitation method, coated titanium dioxide on the surface of cobalt ferrite particles by titanyl sulfate hydrolysis method, and prepared titanium dioxide / cobalt ferrite composite photocatalytic materials with paramagnetism and easy solid-liquid separation. X-ray diffractometer (XRD), transmission electron microscope (TEM) and vibrating sample magnetometer (VSM) were used t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C02F1/30C02F1/72C02F101/30C02F103/30
Inventor 陈士昆周铭陈晔常春陈群黄顺道曹继兵
Owner JIANGSU RONGCHANG NEW MATERIAL TECH
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