Method for preparing Bi2WO6 nano-sheets

A technology of nanosheets and solutions, applied in nanotechnology, chemical instruments and methods, tungsten compounds, etc., to achieve the effects of easy scale production, no environmental pollution, and easy control

Inactive Publication Date: 2017-09-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such as TiO doped with V and N 2 Nanotubes, CeO 2 , MgO and TiO 2 composite materials, etc., but many effective photocatalysts are only sensitive to ultraviolet light, and ultraviolet light only accounts for a small part of the solar energy reaching the earth's surface, and can only use about 4% of solar energy

Method used

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  • Method for preparing Bi2WO6 nano-sheets
  • Method for preparing Bi2WO6 nano-sheets
  • Method for preparing Bi2WO6 nano-sheets

Examples

Experimental program
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Embodiment 1

[0032] 1) Dissolve 1.5mmol sodium tungstate dihydrate in 15ml deionized water, so that the molar concentration of sodium tungstate dihydrate solution is 0.10mol / L;

[0033] 2) 3mmol bismuth ammonium citrate is dissolved in 15ml deionized water, so that the molar concentration of bismuth ammonium citrate solution is 0.20mol / L; a certain amount of NaOH tablet is added to 5ml deionized water, so that its concentration is 0.8mol / L ;Dissolve 0.10mmol of PVA in 5ml deionized water;

[0034] Add the ammonium bismuth citrate solution dropwise to the sodium tungstate solution at a rate of 1-2 drops / second, and add the NaOH solution and the PVA solution dropwise to the above mixed solution at the same rate, and stir for 30 minutes. Heat treatment was carried out at 180° C. for 12 hours. Then, lower to room temperature, take out the reaction product, filter, wash with dilute acetic acid, deionized water and ethanol three times successively, and dry at 60°C to obtain Bi 2 WO 6 Nanoshee...

Embodiment 2

[0036] 1) Dissolve 3mmol sodium tungstate dihydrate in 15ml deionized water, so that the molar concentration of sodium tungstate dihydrate solution is 0.20mol / L;

[0037] 2) Dissolve 6mmol ammonium bismuth citrate in 15ml deionized water, so that the molar concentration of ammonium bismuth citrate solution is 0.40mol / L; add a certain amount of NaOH tablet to 5ml deionized water, so that its concentration is 1.6mol / L ; Dissolve 0.25mmol of PVA in 5ml deionized water;

[0038]Add the ammonium bismuth citrate solution dropwise to the sodium tungstate solution at a rate of 1-2 drops / second, and add the NaOH solution and the PVA solution dropwise to the above mixed solution at the same rate, and stir for 30 minutes. Heat treatment was carried out at 200° C. for 20 hours. Then, lower to room temperature, take out the reaction product, filter, wash with dilute acetic acid, deionized water and ethanol three times successively, and dry at 60°C to obtain Bi 2 WO 6 Nanosheets.

[003...

Embodiment 3

[0041] 1) Dissolve 4.5mmol sodium tungstate dihydrate in 15ml deionized water, so that the molar concentration of sodium tungstate dihydrate solution is 0.30mol / L;

[0042] 2) Dissolve 9mmol ammonium bismuth citrate in 15ml deionized water so that the molar concentration of ammonium bismuth citrate solution is 0.60mol / L; add a certain amount of NaOH tablet to 5ml deionized water so that its concentration is 3.0mol / L ; Dissolve 0.5mmol of PVA in 5ml deionized water;

[0043] Add the ammonium bismuth citrate solution dropwise to the sodium tungstate solution at a rate of 1-2 drops / second, and add the NaOH solution and the PVA solution dropwise to the above mixed solution at the same rate, and stir for 30 minutes. Heat treatment was carried out at 250° C. for 32 hours. Then, it was lowered to room temperature, the reaction product was taken out, filtered, washed three times with dilute acetic acid, deionized water and ethanol, and dried at 60°C to obtain Bi 2 WO 6 Nanosheets. ...

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Abstract

The invention relates to a method for preparing Bi2WO6 nano-sheets. The method comprises the following steps: 1) dropwise adding an ammonium bismuth citrate solution into a sodium tungstate solution, wherein the mol concentration of the ammonium bismuth citrate solution is 0.2mol/L to 0.6mol/L, and the mol concentration of the sodium tungstate solution is 0.1mol/L to 0.3mol/L; 2) continually dropwise adding an NaOH solution and a PVA solution; after mixing, carrying out hydrothermal reaction; filtering and washing to obtain the Bi2WO6 nano-sheets, wherein the mol concentration of the NaOH solution is 0.1mol/L to 3mol/L, and the mol concentration of the PVA solution is 0.01mol/L to 0.1mol/L. The Bi2WO6 nano-sheets prepared by the method have a good appearance and a uniform size.

Description

technical field [0001] The present invention relates to Bi 2 WO 6 The synthetic field of, be specifically related to a kind of preparation Bi 2 WO 6 nanosheet method. Background technique [0002] Since 1972, Fujishima and Honda research found that when single crystal TiO 2 As the anode and Pt as the cathode can decompose water into hydrogen and oxygen under the irradiation of visible light, the majority of scientific workers have begun to pay attention to the use of solar energy for photocatalysis research. [0003] The progress of photocatalyst research has been greatly advanced in the past few decades. Such as TiO doped with V and N 2 Nanotubes, CeO 2 , MgO and TiO 2 However, many effective photocatalysts are only sensitive to ultraviolet light, and ultraviolet light only accounts for a small part of the solar energy reaching the earth's surface, and only about 4% of solar energy can be utilized. Therefore, in order to efficiently utilize solar energy, the develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00B82Y40/00
CPCC01G41/00C01P2002/72C01P2004/03C01P2004/22
Inventor 徐刚皇甫统帅孙小磊沈鸽韩高荣
Owner ZHEJIANG UNIV
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