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Bi*WO*/oxide fiber cloth with multistage heterogeneous structure, method and application

A technology of heterostructures and oxides, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, botanical equipment and methods, etc., to achieve the effects of simple preparation process, low cost and short cycle

Inactive Publication Date: 2010-01-13
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, TiO is synthesized by electrospinning technology 2 , SiO 2 and other photocatalyst reports (Nano Lett.2003, 3, 555), while the field of visible light photocatalysis of composite oxides has never been reported

Method used

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  • Bi*WO*/oxide fiber cloth with multistage heterogeneous structure, method and application
  • Bi*WO*/oxide fiber cloth with multistage heterogeneous structure, method and application
  • Bi*WO*/oxide fiber cloth with multistage heterogeneous structure, method and application

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Experimental program
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Effect test

Embodiment 1

[0028] TiO for electrospinning 2 The precursor sol is composed of polyvinylpyrrolidone (PVP) with a mass concentration of 5%, 20% acetic acid, 20% tetrabutyl titanate and the rest of ethanol, which are stirred and mixed. At room temperature, the above-mentioned precursor sol was added to the electrospinning equipment, so that the precursor was formed as TiO in the injection device 2 Ejection in the form of nanowires, obtaining TiO on the receiving device 2 Fiber cloth composed of precursor nanowires. TiO 2 The precursor fiber cloth was sintered at 500 °C for 2 hours to obtain TiO 2 Fiber cloth.

[0029] Alcohothermal synthesis of Bi 2 WO 6 The precursor used is 0.485g Bi(NO 3 ) 3 ·5H 2 O (analytically pure) and 0.165g Na 2 WO 4 2H 2 O (analytical grade), dissolved in 40mL ethylene glycol. Bi 2 WO 6 Precursors and nano TiO 2 Fiber cloth joins in the alcohol heat kettle, wherein Bi 2 WO 6 Precursor and Nano TiO 2 The mass ratio of the fiber cloth is 800:1. Aft...

Embodiment 2

[0033] TiO for electrospinning 2 The precursor sol is composed of polyvinylpyrrolidone (PVP) with a mass concentration of 8%, 10% acetic acid, 10% tetrabutyl titanate and the rest of ethanol, which are stirred and mixed. At room temperature, the above precursors were added to the electrospinning equipment, so that the precursors were transformed into TiO in the injection device 2 Ejection in the form of nanowires, obtaining TiO on the receiving device 2 Fiber cloth composed of precursor nanowires. TiO 2 The precursor fiber cloth was sintered at 500 °C for 2 hours to obtain TiO 2 Fiber cloth.

[0034] Bi for alcohol thermal synthesis 2 WO 6 The precursor is composed of 0.796g bismuth citrate (analytical pure) and 0.329g Na 2 WO 4 2H 2 O (analytical grade), dissolved in 40mL glycerol. Bi 2 WO 6 Precursors and nano TiO 2 Fiber cloth joins in the alcohol heat kettle, wherein Bi 2 WO 6 Precursor and Nano TiO 2 The mass ratio of the fiber cloth is 100:1. After sealin...

Embodiment 3

[0037] TiO prepared by electrospinning 2 The preparation method of fiber cloth is the same as embodiment 1.

[0038] Bi for alcohol thermal synthesis 2 WO 6 The precursor is composed of 0.323g bismuth oxalate (analytical pure) and 0.066g Na 2 WO 4 2H 2 O (analytical grade), dissolved in 40mL ethylene glycol. Bi 2 WO 6 Precursors and nano TiO 2 Fiber cloth joins in the alcohol heat kettle, wherein Bi 2 WO 6 Precursor and Nano TiO 2 The mass ratio of the fiber cloth is 1200:1. After sealing the kettle, put it in an oven, and heat it with alcohol at a temperature of 160° C. for 16 hours to make Bi 2 WO 6 nanoparticles form nanosheets and further grow on TiO 2 On the fiber cloth, the Bi with hierarchical heterostructure 2 WO 6 / TiO 2 Fiber cloth.

[0039] After XRD component analysis, Bi 2 WO 6 with TiO 2 Composite nanofiber cloth. According to electron microscope observation, the fiber cloth is made of Bi with a side length of 70nm and a thickness of 15nm pre...

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Abstract

The invention relates to Bi2WO6 / oxide nanofiber cloth with a multistage heterogeneous structure, a prepration method and an application. The method combines the electrospinning and alcohol-thermal synthesis technology and prepares the Bi2WO6 / TiO2 or Bi2WO6 / ZnO fiber cloth with the multistage heterogeneous structure, Bi2WO6 nanosheets with the side length of 50-200nm and the thickness of 10-40nm are grown on mutually orderly interwoven TiO2 fiber or ZnO fiber with the diameter of 100-500nm in an inclined manner, wherein, the Bi2WO6 nanosheets consist of Bi2WO6 nanoparticles with the dimension of 10-40nm. The Bi2WO6 / TiO2 or ZnO fiber cloth with the multistage heterogeneous structure has the advantages of greater strength, smaller particle size, larger specific surface area and the multistage heterogeneous structure, thereby having important applications in solar cells, photocatalysis, self-cleaning and other aspects.

Description

technical field [0001] The present invention relates to the preparation and application of visible light-responsive photocatalysts, in particular to Bi with a hierarchical heterostructure 2 WO 6 / Oxide fiber cloth and method of making, and using it to decompose harmful chemicals under light. Background technique [0002] Due to the increasing environmental pollution and energy crisis in the world, the research and application of semiconductor photocatalysis has attracted widespread attention. The core problem of photocatalytic technology is the design of suitable photocatalysts, and the development and research, especially the research of high-performance photocatalytic materials responsive to visible light, has become a top priority. The most reported new photocatalysts are Bi 2 WO 6 , BiVO 4 , CaBi 2 O 4 and other complex oxides containing the metal element bismuth. However, this new type of photocatalyst is currently developed, although it has a certain response i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/31B01J35/06D01D5/00B01J37/08A62D3/17A61L9/00B01D53/94A01N59/16A01P1/00A62D101/20A62D101/28
Inventor 王文中尚萌
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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