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Visible-light response magnetic compound photocatalytic material and preparation method thereof

A composite photocatalysis and visible light technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve problems such as damage and strong corrosion, and achieve magnetic properties. Excellent, simple recycling effect

Inactive Publication Date: 2016-07-06
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnetic Fe 3 o 4 The preparation of MIL-101(Cr) faces great challenges, mainly because the traditional synthesis process of MIL-101(Cr) is synthesized at 220°C, using hydrofluoric acid as a mineralizer, and pH3 o 4 form damage

Method used

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  • Visible-light response magnetic compound photocatalytic material and preparation method thereof
  • Visible-light response magnetic compound photocatalytic material and preparation method thereof
  • Visible-light response magnetic compound photocatalytic material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The preparation of a magnetic composite photocatalytic material responsive to visible light, the specific synthesis steps are as follows:

[0030] (1) Thioglycolic acid modified Fe 3 o 4 Preparation of:

[0031] 1.35g ferric chloride (Fe 3 Cl 3 ·6H 2 O) Dissolve in 40mL of ethylene glycol to form a clear liquid, then weigh 3.6g of anhydrous sodium acetate and 1.0g of polyethylene glycol into the ferric chloride solution, stir and dissolve, transfer to a high-pressure reactor, and store at 200°C The reaction product was separated by a magnet for 8 hours, washed 5 times with absolute ethanol and deionized water, and dried in vacuum at 60°C for 8 hours to obtain Fe 3 o 4 Magnetic nanoparticles; 0.1g Fe 3 o 4 The magnetic nanoparticles were added to 20 mL of ethanol solution of thioglycolic acid (0.29 mM) and stirred for 24 hours. The product was separated by a magnet, washed alternately with deionized water and absolute ethanol four times, and dried at 60 °C for 9 ...

Embodiment 2

[0037] The preparation of MIL-101 (Cr) material is as described in Example 1 step (2), except that Fe is not added 3 o 4 Nanoparticles.

[0038] Figure 1~5 It is the XRD, XPS, TEM, UV-VisDRS characterization diagram and the effect diagram of RhB degradation according to each sample in Examples 1-2 of the present invention.

[0039] Depend on figure 1 It can be seen that the prepared Fe 3 o 4 The XRD pattern of MIL-101(Cr) has both Fe 3 o 4 and the characteristic peaks of MIL-101(Cr), indicating that our alkaline condition can successfully synthesize the magnetic metal-organic framework material Fe 3 o 4 MIL-101(Cr), the hydrothermal process will not cause Fe 3 o 4 Crystal destruction. At the same time, Fe 3 o 4 The XRD pattern of MIL-101(Cr)Ag-AgBr has Fe 3 o 4 , MIL-101(Cr) and Ag-AgBr three characteristic peaks, indicating that Fe 3 o 4 The MIL-101(Cr)Ag-AgBr composite material is composed of these three materials, and the loading process of Ag-AgBr did not...

Embodiment 3

[0045] Respectively, the preparation method of the magnetic composite photocatalytic material responsive to visible light, the steps are basically the same as in the examples, the difference is that in step (2) Fe 3 o 4 It is 0.116g.

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PUM

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Abstract

The invention discloses a visible-light response magnetic compound photocatalytic material and a preparation method thereof. The material is Fe3O4@MIL-101 (Cr)@Ag-AgBr. The preparation method comprises the following steps: firstly, preparing mercaptoacetic acid modified Fe3O4; adding the modified Fe3O4 to an alkali MIL-101(Cr) precursor solution and in-situ preparing a magnetic metal organic framework material Fe3O4@MIL-101(Cr) through a simple hydrothermal method; and utilizing a coprecipitation-photo-reduction method to load Ag-AgBr to the prepared Fe3O4@MIL-101(Cr), thereby acquiring a target product. The compound material prepared according to the method provided by the invention has the magnetic property of magnetic nanoparticles and excellent visible light catalytic pollutant-degradation capability and can be applied as an excellent photocatalytic material for removing environmental pollutants in a light degradation manner. An externally applied magnetic field can be adopted for simply recycling the photocatalytic material.

Description

technical field [0001] The invention belongs to the technical field of silver / silver halide magnetic metal organic framework materials, and in particular relates to a visible light responsive magnetic composite photocatalytic material and a preparation method thereof. Background technique [0002] In recent years, Ag-AgBr plasmonic photocatalytic materials have attracted widespread attention. Researchers have found that this type of photocatalytic material has a good response to visible light, and the presence of metallic Ag can significantly inhibit the decomposition of AgBr to maintain its stability. properties, and found that if Ag-AgBr is dispersed in a certain carrier (such as TiO 2 , SiO 2 etc.), its photocatalytic performance and stability can be improved. [0003] In order to realize the recycling of photocatalytic materials, researchers combined photocatalytic materials with magnetic nanoparticles (magnetic matrix) to prepare magnetic photocatalytic materials, whi...

Claims

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Application Information

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IPC IPC(8): B01J31/28C02F1/30
CPCC02F1/30B01J31/1691B01J31/28B01J2531/0205B01J2531/62C02F2305/10C02F2101/308B01J35/33B01J35/39
Inventor 李小娟黄斌李小飞刘明华林春香刘以凡林振宇邱彬
Owner FUZHOU UNIV
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