Multi-morphology rare earth doped BiVO4 composite photocatalyst and preparation method thereof

A rare earth doping and catalyst technology, applied in the field of photocatalytic materials, can solve the problems of limited utilization by humans, and achieve the effects of controllable morphology and structure, high photocatalytic degradation effect, and high specific surface area

Inactive Publication Date: 2012-08-22
HUAIYIN TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Solar energy has always been considered as a natural energy source with abundant reserves and sustainable utilization, but its utilization by humans is still very limited.

Method used

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  • Multi-morphology rare earth doped BiVO4 composite photocatalyst and preparation method thereof
  • Multi-morphology rare earth doped BiVO4 composite photocatalyst and preparation method thereof
  • Multi-morphology rare earth doped BiVO4 composite photocatalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: Synthesize Sm-doped BiVO according to the following steps 4 :

[0022] 1) Weigh 2.425g Bi(NO 3 ) 3 ?5H 2 O dissolved in 10mL 2mol / L HNO 3 solution, then add 0.9304g of EDTA and ultrasonically dissolve for 30min to obtain solution a, weigh 0.5800g NH 3 VO 4 Dissolved in 20mL of 2mol / L NaOH solution to obtain solution b;

[0023] 2) Gradually add the above solution b to the solution a dropwise under constant stirring, and add 0.0005mol of Sm(NO 3 ) 3 , continue to stir for 1h to obtain a yellow suspension, then add 10mL of absolute ethanol and continue to stir for 2h to obtain a reaction precursor;

[0024] 3) Move the reaction precursor to a stainless steel reactor lined with white polytetrafluoroethylene, and put it in a 140°C constant temperature box for hydrothermal treatment for 6 hours;

[0025] 4) Extract the reaction product by filtration, wash the obtained product with deionized water and absolute ethanol for 2 to 3 times until the pH of t...

Embodiment 2

[0026] Embodiment 2: BiVO of Ce is synthesized according to the following steps 4 :

[0027] 1) Weigh 2.425g Bi(NO 3 ) 3 ?5H 2 O dissolved in 5mL 4mol / L HNO 3 solution, then add 0.9304g of EDTA and ultrasonically dissolve for 20min to obtain solution a, weigh 0.5510g NH 3 VO 4 Dissolved in 10mL of 4mol / L NaOH solution to obtain solution b;

[0028] 2) Gradually add the above solution b to the solution a dropwise under constant stirring, and add 0.001mol of Ce(NO 3 ) 3 , continue stirring for 30 minutes to obtain a yellow suspension, then add 15 mL of absolute ethanol and stir for 1 hour to obtain a reaction precursor;

[0029] 3) Move the reaction precursor to a stainless steel reactor lined with white polytetrafluoroethylene, and put it in a 120°C constant temperature box for hydrothermal treatment for 6 hours;

[0030] 4) Extract the reaction product by filtration, wash the obtained product with deionized water and absolute ethanol for 2 to 3 times until the pH val...

Embodiment 3

[0031] Embodiment 3: Synthesize Dy-doped BiVO according to the following steps 4 :

[0032] 1) Weigh 2.425g Bi(NO 3 ) 3 ?5H 2 O dissolved in 2.5mL 6mol / L HNO 3 solution, then add 0.9304g of EDTA and ultrasonically dissolve it for 10min to obtain solution a, weigh 0.5220g NH 3 VO 4 Dissolved in 5mL of 6mol / L NaOH solution to obtain solution b;

[0033] 2) Gradually add the above solution b to the solution a dropwise under constant stirring, and add 0.00025mol of Dy(NO 3 ) 3 , continue to stir for 30 minutes to obtain a yellow suspension, then add 20 mL of absolute ethanol for 30 minutes to obtain a reaction precursor;

[0034] 3) Move the reaction precursor to a stainless steel reactor lined with white polytetrafluoroethylene, and put it in a 160°C constant temperature box for hydrothermal treatment for 4 hours;

[0035] 4) Extract the reaction product by filtration, wash the obtained product with deionized water and absolute ethanol 2 to 3 times until the pH value of t...

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Abstract

The invention discloses a multi-morphology rare earth doped BiVO4 composite photocatalyst and a preparation method thereof. The composite photocatalyst comprises the component of Ln(1-x)BiVO4, wherein Ln is equal to La, Ce, Pr, Nd, Sm, Gd, Dy, Er and Y, and x is equal to 0.01-0.3mol%. The photocatalyst disclosed by the invention has different morphologies and has the advantages of simple preparation technology, controllable morphology and crystalline phase structure of a target product and big specific surface area, and various organic pollutants, such as toxic and harmful phenols, aldehydes, and dyes, can be decomposed within a wider wavelength range.

Description

technical field [0001] The invention belongs to photocatalytic materials, in particular to a multi-morphology rare earth doped BiVO 4 Composite photocatalyst and preparation method thereof. technical background [0002] Solar energy has always been considered as a natural energy with abundant reserves and sustainable utilization, but its utilization by human beings is still very limited. Photocatalytic technology, as a new catalytic technology that can directly use solar energy to produce hydrogen and deeply degrade highly toxic organic pollutants in the environment, has great prospects in energy and environmental applications in the 21st century. BiVO 4 As a new type of semiconductor photocatalytic material with the advantages of non-toxicity, high stability and strong visible light response, it has attracted the attention of many researchers. [0003] With the in-depth research on photocatalysts, it is found that the microscopic morphology, particle size and lattice com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22
Inventor 张莉莉龙金鑫仲慧周守勇赵宜江汪信
Owner HUAIYIN TEACHERS COLLEGE
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