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A mesoporous fe-based mof@agi high-efficiency composite visible light photocatalytic material and its preparation method and application

A photocatalytic material, visible light technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., to achieve large adsorption capacity, improve photocatalytic activity, and improve separation efficiency and photocatalytic activity

Active Publication Date: 2020-05-22
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a mesoporous Fe-based MOF@AgI high-efficiency composite visible light photocatalyst and its preparation method and application to overcome the defects of a single catalytic material and improve the degradation of organic pollutants through the separation of photogenerated charges promoted by the composite. Such as the photocatalytic effect of Rhodamine B

Method used

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  • A mesoporous fe-based mof@agi high-efficiency composite visible light photocatalytic material and its preparation method and application
  • A mesoporous fe-based mof@agi high-efficiency composite visible light photocatalytic material and its preparation method and application
  • A mesoporous fe-based mof@agi high-efficiency composite visible light photocatalytic material and its preparation method and application

Examples

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Effect test

Embodiment 1

[0033] This example prepares mesoporous Fe-MIL-88B-NH according to the following steps 2 @AgI efficient composite visible light photocatalytic material:

[0034] 1. Preparation of polystyrene template

[0035] Dissolve 2.040g of stabilizer polyvinylpyrrolidone in 60.147g of absolute ethanol, transfer the resulting solution into a three-necked flask, stir for 0.5h under nitrogen protection and a constant temperature of 60°C, and then dissolve 0.260g of azobisiso Butyronitrile and 25.214g of styrene, which was sealed and stored in a closed light after vacuum distillation at 60°C, were added to the above system, and then 9.523g of deionized water was added to the system, and the temperature was raised to 70°C. After constant temperature reaction for 12 hours, the obtained product was cooled to Centrifuge at room temperature at a speed of 6000 r / min, wash twice with ethanol, and dry under vacuum at 60° C. to obtain white polystyrene template powder.

[0036] 2. Sulfonation of po...

Embodiment 2

[0046] This embodiment prepares Fe-MIL-88B-NH in the same manner as in Example 1 2 @AgI high-efficiency composite visible light photocatalytic material, the only difference is: AgNO in step 4 3 The volume of the solution and the KI solution was changed to 7.37mL and 5.65mL respectively, and the resulting product Fe-MIL-88B-NH 2 The photocatalytic properties of @AgI(2:1) are as follows image 3 shown.

Embodiment 3

[0048] This embodiment prepares Fe-MIL-88B-NH in the same manner as in Example 1 2 @AgI high-efficiency composite visible light photocatalytic material, the only difference is: AgNO in step 4 3 The volume of the solution and the KI solution was changed to 22.0mL and 17.0mL respectively, and the resulting product Fe-MIL-88B-NH 2 The photocatalytic performance of @AgI(2:3) as image 3 shown.

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Abstract

The invention discloses a mesoporous Fe-based MOF@AgI high-efficiency composite visible light photocatalytic material and its preparation method and application. It is characterized in that: the photocatalytic material is made of mesoporous microspheres Fe‑MIL‑88B‑NH. 2 The surface and interior of the MOF material are loaded with AgI particles, which are synthesized by dispersion polymerization method to synthesize sulfonated polystyrene microspheres and used them as templates to synthesize mesoporous microspheres Fe‑MIL‑88B‑NH. 2 material, and then load AgI particles to obtain the target product. In the composite material of the present invention, the mesoporous microspheres Fe‑MIL‑88B‑NH 2 The material has a large adsorption capacity, and AgI particles have strong photocatalytic properties. The binary photocatalyst synthesized by combining the advantages of the two has significantly enhanced visible light photocatalytic degradation of organic dyes under the synergistic effect of composite-promoted photogenerated charge separation. It has broad application prospects in the field of photocatalytic environmental purification.

Description

technical field [0001] The invention belongs to the fields of material preparation, visible light photocatalysis technology and environmental protection, and specifically relates to the preparation of a binary high-efficiency composite photocatalyst Fe-based MOF@AgI and its application in catalytically degrading organic pollutants in water under visible light. Background technique [0002] Today's energy shortages and environmental pollution have attracted more and more attention, and the sustainable development of human society is facing enormous challenges. Photocatalytic technology is a new type of environmental protection and energy technology with broad application prospects. It has the advantages of high processing efficiency, simple process equipment, long cycle life, easy control of operating conditions, non-selective degradation of organic pollutants, green and pollution-free, etc. Therefore, it is an ideal way to solve energy and environmental problems. [0003] A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28C02F1/28C02F1/30C02F101/30
CPCC02F1/288C02F1/30B01J31/28C02F2101/308C02F2305/10B01J35/51B01J35/39
Inventor 刘雪霆王芳卢叶婧祎梁俊燊孙冬文侯鑫赵明
Owner HEFEI UNIV OF TECH