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Semiconductor Bi2O3-Ta2O5 composite nanometer fiber, and preparation method and applications thereof

A bi2o3-ta2o5, composite nanofiber technology, applied in the field of nanomaterials and photocatalysis, to achieve the effect of facilitating market promotion, uniform dispersion, and good degradation performance

Inactive Publication Date: 2013-09-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, there is no Bi 2 o 3 -Ta 2 o 5 Report on Composite Nanofibers

Method used

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  • Semiconductor Bi2O3-Ta2O5 composite nanometer fiber, and preparation method and applications thereof
  • Semiconductor Bi2O3-Ta2O5 composite nanometer fiber, and preparation method and applications thereof
  • Semiconductor Bi2O3-Ta2O5 composite nanometer fiber, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of Semiconductor Bi by Combining Template Method and Hydrothermal Method 2 o 3 -Ta 2 o 5 Composite nanofibers, comprising the steps of:

[0032] 1) Take 45ml of sodium hydroxide to make a solution with a concentration of 0.025mol / L, and add 0.09g (1.856*10 -4 mol) bismuth nitrate pentahydrate, uniformly mixed;

[0033] 2) Preparation of Ta by electrospinning method 2 o 5 Nanowire precursor, tantalum ethoxide, ethanol, acetic acid, and PVP K30 are prepared into a solution, the voltage is 10Kv, and the flow rate is 400ul / h to obtain Ta 2 o 5 Nanofibers are Ta 2 o 5 Nanowire precursor; (for details, refer to Wuhan University of Technology's 2012 master's thesis "Design, regulation and photocatalytic hydrogen production performance of tantalum-based porous nanofibers")

[0034] 3) Add the above mixed solution to 0.045g (0.905*10 -4 mol) Ta 2 o 5 In the nanowire precursor, uniformly mix to obtain a mixed solution;

[0035] 4) Transfer the mixed solu...

Embodiment 2

[0041] Preparation of Semiconductor Bi by Combining Template Method and Hydrothermal Method 2 o 3 -Ta 2 o 5 Composite nanofibers, comprising the steps of:

[0042] 1) Take 45ml of sodium hydroxide solution with a concentration of 0.01mol / L, add 0.09g of bismuth nitrate pentahydrate to the solution, and mix evenly;

[0043] 2) Add the above mixed solution to 0.045gTa 2 o 5 In the nanowire precursor (preparation is the same as in Example 1, the same below), uniformly mix to obtain a mixed solution;

[0044] 3) Transfer the mixed solution into a 60ml reaction kettle and react at 200°C for 5 hours to obtain a light yellow solution;

[0045] 4) Cool the obtained solution naturally, wash it, and put it in an oven at 60°C to dry it completely. The obtained white and yellow powder is Bi 2 o 3 -Ta 2 o 5 composite nanofibers.

[0046] Bi prepared by the present invention 2 o 3 -Ta 2 o 5 Composite nanofiber photocatalytic material, through the degradation test of methylene...

Embodiment 3

[0048] Preparation of Semiconductor Bi by Combining Template Method and Hydrothermal Method 2 o 3 -Ta 2 o 5 Composite nanofibers, comprising the steps of:

[0049] 1) Take 45ml of a solution made of sodium hydroxide with a concentration of 0.02mol / L, then add 0.045g of bismuth nitrate pentahydrate to the solution, and mix evenly to obtain a mixed solution;

[0050] 2) Add the above mixed solution to 0.045gTa 2 o 5 In the nanowire precursor, mix evenly;

[0051] 3) Transfer the mixed solution into a 60ml reaction kettle and react at 200°C for 12 hours to obtain a light yellow solution;

[0052] 4) Cool the obtained solution naturally, wash it, and put it in an oven at 60°C to dry it completely. The obtained white and yellow powder is Bi 2 o 3 -Ta 2 o 5 composite nanofibers.

[0053] Bi prepared by the present invention 2 o 3 -Ta 2 o 5 Composite nanofiber photocatalytic material, through the degradation test of methylene blue under visible light, it has good degra...

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Abstract

The invention relates to a semiconductor Bi2O3-Ta2O5 composite nanometer fiber, and a preparation method thereof. The fiber has a hetero-structure that Bi2O3 nanometer particles are grown on a one-dimensional Ta2O5 nanowire plate, homogeneous structure size and good dispersibility, and a diameter of 80-120 nm. The fiber is prepared by the following method: 1) adding a bismuth source into a sodium hydroxide solution, mixing uniformly; 2) adding the mixing solution to a Ta2O5 nanowire precursor, mixing uniformly and obtaining a mixing liquid; 3) transferring the mixing liquid into a reaction vessel, reacting, and obtaining a light yellow solution; 4) natural cooling the obtained solution, washing, placing in a baking oven, completely drying, and obtaining the fiber. The material exhibits good degradation performance when used to degrade pollutants. The technology is simple, meets requirements of green chemistry, and is favorable for the marketization promotion.

Description

technical field [0001] The invention belongs to the field of nanomaterials and photocatalysis, in particular to a semiconductor Bi 2 o 3 -Ta 2 o 5 Composite nanofiber and its preparation method, the material can be used to degrade pollutants under visible light. Background technique [0002] With the progress of society and the rapid development of economy, the pollution of the environment is becoming more and more serious. Semiconductor photocatalytic materials have attracted much attention due to their potential application in converting sunlight energy and degrading pollutants. Improving photocatalytic efficiency and developing visible light response are the current research the trend of. Studies have shown that the photocatalytic efficiency is closely related to the structure of the catalyst, and heterostructures with special morphology, good crystallinity and small size can effectively separate photogenerated electrons and holes and improve photocatalytic efficiency...

Claims

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Application Information

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IPC IPC(8): B01J23/20B01J35/06A62D3/17A62D101/28
Inventor 施伟东孙晓莉官建国
Owner WUHAN UNIV OF TECH
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