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Preparation method and application of a bioi/zn2geo4 heterojunction visible light catalyst

A visible light and catalyst technology, applied in the field of environmental pollution control, can solve the problems of narrow photoresponse range and low electron-hole separation efficiency, and achieve the effects of simple preparation process, reduced preparation cost, and excellent visible light catalytic degradation activity

Inactive Publication Date: 2016-04-20
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Combining wide-bandgap semiconductors with high electron / hole separation efficiency and narrow-bandgap semiconductors with wide spectral absorption by chemical precipitation preparation method to solve the problems of narrow photoresponse range and low electron-hole separation efficiency of photocatalysts in the prior art Through experiments, the factors affecting the preparation of visible light-responsive composite photocatalysts, such as temperature, solvent, and compounding ratio, were explored.

Method used

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  • Preparation method and application of a bioi/zn2geo4 heterojunction visible light catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 Zn 2 GeO 4 Preparation of nanorods

[0018] Synthesis of Zn by Solvothermal Method 2 GeO 4 nanorods, 2mMGeO 2 and 1mMZn(CH 3 COO) 2 ?2H 2 O was dissolved in 40 mL of a mixed solvent of ethylenediamine and water with a volume ratio of 3:3, stirred magnetically for 60 minutes, transferred to a 50 mL polytetrafluoroethylene reaction kettle, and reacted at 160 °C for 36 hours, and deionized Wash with water and ethanol three times respectively. After the autoclave is gradually cooled to room temperature, centrifuge and precipitate, wash with ethanol and deionized water three times respectively, and place the product in an oven at 80°C for 8 hours.

Embodiment 2

[0019] Example 2 Zn 2 GeO 4 Preparation of nanorods

[0020] Synthesis of Zn by Solvothermal Method 2 GeO 4 nanorods, 2mMGeO 2 and 1mMZn(CH 3 COO) 2 ?2H 2 O was dissolved in 40 mL of a mixed solvent of ethylenediamine and water with a volume ratio of 3:5, stirred magnetically for 60 minutes, transferred to a 50 mL polytetrafluoroethylene reaction kettle, and reacted at 200 ° C for 16 hours, and deionized Wash with water and ethanol three times respectively. After the autoclave is gradually cooled to room temperature, centrifuge and precipitate, wash with ethanol and deionized water three times respectively, and place the product in an oven at 80°C for 8 hours.

Embodiment 3B

[0021] Example 3 BiOI / Zn 2 GeO 4 Preparation of Heterojunction Visible Light Catalyst

[0022] Preparation of BiOI / Zn by Chemical Precipitation 2 GeO 4 Heterojunction Visible Light Catalyst Controlling BiOI and Zn 2 GeO 4 The mass ratio of KI is 0.2:1, 0.0625g KI is dissolved in 80mL deionized water to form A solution; 0.0019g of Zn 2 GeO 4 The nanorods were added to the A solution and dispersed ultrasonically for 20 minutes; 0.1825gBi(NO 3 ) 3 ·5H 2 Dissolve O in 20mL ethylene glycol to form B solution; slowly add B solution dropwise to A solution, stir magnetically for 60 minutes, transfer to a 250mL round bottom flask, and reflux in an oil bath at 80°C for 6h; after cooling, take out The sample was washed three times with deionized water and absolute ethanol, and the product was placed in an oven and dried at 60°C. BiOI / Zn 2 GeO 4 The morphology of heterojunction visible photocatalysts can be seen in figure 1 shown.

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Abstract

The invention discloses a preparation method of a BiOI / Zn2GeO4 heterojunction visible light catalyst, which belongs to the technical field of environmental pollution control. Its characteristic is that first Zn2GeO4 passes through Zn(Ac)2·2H2O and GeO2 in ethylenediamine / water volume ratio? It was prepared by solvothermal method under the mixed solvent condition of 3︰5; then, with Bi(NO3)3·5H2O as the bismuth source and KI as the iodine source, in a mixed solvent with a volume ratio of ethylene glycol / water of 2︰8 , BiOI / Zn2GeO4 heterojunction visible photocatalyst prepared by chemical deposition method. The preparation method of the invention has the advantages of simple operation, stable performance, high pollutant degradation rate and no other pollutants in the preparation process, and has high practical value and application prospect.

Description

Technical field [0001] The invention is the field of environmental pollution control technology, which involves BIOI / ZN 2 Geo 4 The method of preparation of photocatalysts and applications of heterogeneous knots. Background technique [0002] Environmental pollution control and governance is a major topic facing and urgently needed to be resolved in the 21st century of humans. Optical catalytic technology is a high -tech that developed environmental pollution governance as its application background in recent years.The photocatalytic process is a light-induced oxidation-restoration process. It has the depth reaction of room temperature, can directly use sunlight as a light source to activate the catalyst, and the unique performance of secondary pollution. It is an ideal environmental protection new technology.Photocatalyst is the core of photocatalytic technology and the basis for the development and promotion of photocatalytic products.The key to preparing semiconductor photocat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/138C02F1/30C02F1/72C02F101/34
Inventor 王晓东闫涛魏琴杜斌刘红烨孙蒙闫良国李蒙蒙
Owner UNIV OF JINAN