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Method for preparing titanium-tungsten compound oxide nano-fiber

A composite oxide and nanofiber technology, applied in fiber treatment, spinning solution preparation, fiber chemical characteristics, etc., to achieve the effect of uniform particle size, high specific surface area, and regular shape

Inactive Publication Date: 2012-02-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for efficient creation of Titanum nitride nanoparticles with unique properties that are useful in various fields such as catalysis or sensors. These particles consists mostly of small metal atoms arranged regularly on their surfaces, which makes them highly effective at reducing pollution from exhaust gases emitted by vehicles burning fossil fuels.

Problems solved by technology

This patents discuss how improving the effectiveness of decompositing contaminated materials like nitrogen monoxanes into nontoxic products through catalysis reactions involving titania particles. Current techniques involve adding specific chemicals called dopants during synthesis processes, resulting in low conversion rates due to lowered activity levels caused by reduced electron affinity at certain wavelength regions. To address this issue, new approaches were developed including modifying surfaces with rare earth metal elements, making them highly sensitive towards various types of molecules present within these environments.

Method used

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  • Method for preparing titanium-tungsten compound oxide nano-fiber
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  • Method for preparing titanium-tungsten compound oxide nano-fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Configuration of spinning solution

[0036] Slowly add 3.87g of tetrabutyl titanate solution dropwise into a mixed solution of 4ml of absolute ethanol and 3ml of glacial acetic acid under stirring, stir magnetically for 2 hours, add 0.13g of tungsten chloride to it, and continue stirring for 2 hours to obtain Solution A;

[0037] Weigh 1.40g of PVP into a beaker, and add absolute ethanol to it to 10ml, stir magnetically for 2 hours to obtain solution B;

[0038] Prepare 5ml of organic solvent (referred to as C), its substance and volume ratio is acetone: N-N dimethylformamide (DMF): acetylacetone=2: 1: 2;

[0039] Then solution A and solution B were mixed to form a jelly-like cross-linked product immediately, and organic solvent C was added and stirred for 2 hours to obtain a clear and transparent spinning solution.

[0040] (2) Electrospinning

[0041] The precursor spinning solution prepared above is spun on a self-assembled spinning device, the voltage is 13kV...

Embodiment 2

[0045] (1) Configuration of spinning solution

[0046] Slowly add 3.70g of tetrabutyl titanate solution dropwise into a mixed solution of 3ml of absolute ethanol and 4ml of glacial acetic acid under stirring, stir magnetically for 2 hours, add 0.28g of tungsten chloride to it, and continue stirring for 2 hours to obtain Solution A;

[0047] Weigh 1.40g of PVP into a beaker, and add absolute ethanol to it to 10ml, stir magnetically for 2 hours to obtain solution B;

[0048] Prepare 6ml of organic solvent (referred to as C), its substance and volume ratio is acetone: N-N dimethylformamide (DMF): acetylacetone=2: 2: 1;

[0049] Then solution A and solution B were mixed to form a jelly-like cross-linked product immediately, and organic solvent C was added and stirred for 2 hours to obtain a clear and transparent spinning solution.

[0050] (2) Electrospinning

[0051] The precursor spinning solution prepared above was spun on a self-assembled spinning device with a voltage of 1...

Embodiment 3

[0055] (1) Configuration of spinning solution

[0056] Slowly add 3.06g of tetrabutyl titanate solution dropwise into a mixed solution of 4ml of absolute ethanol and 3ml of glacial acetic acid under stirring, stir magnetically for 2 hours, then add 0.93g of tungsten chloride to it, and continue stirring for 2 hours to obtain Solution A;

[0057] Weigh 1.40g of PVP into a beaker, and add absolute ethanol to it to 10ml, stir magnetically for 2 hours to obtain solution B;

[0058] Prepare 5ml of organic solvent (referred to as C), its substance and volume ratio is acetone: N-N dimethylformamide (DMF): acetylacetone=1: 2: 2;

[0059] Then solution A and solution B were mixed to form a jelly-like cross-linked product immediately, and organic solvent C was added and stirred for 2 hours to obtain a clear and transparent spinning solution.

[0060] (2) Electrospinning

[0061] The precursor spinning solution prepared above is spun on a self-assembled spinning device, the voltage is...

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Abstract

The invention relates to a method for preparing a titanium-tungsten compound oxide nano-fiber. The method comprises the following steps of: (1) adding a soluble titanium salt and a soluble tungsten salt into a mixed solvent of absolute ethanol and acetic acid, adding into an ethanol solution of PVP (Polyvinyl Pyrrolidone), stirring, and adding a mixed organic solvent of acetone, N-N dimethyl formamide and acetylacetone to obtain a spinning solution; (2) spinning the spinning solution to obtain a PVP non-woven fabric containing titanium and tungsten precursors; and (3) calcining the PVP non-woven fabric at 450-550 DEG C to obtain the titanium-tungsten compound oxide nano-fiber. The preparation method is simple, is easy to control, has relatively low cost and low requirement on equipment, and is suitable for scale production; and the titanium-tungsten compound oxide nano-fiber has regular appearance, uniform particle size and high specific surface area, and can be used for preparing photo-catalysts, dye-sensitized solar cells and the like.

Description

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Claims

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Application Information

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Owner DONGHUA UNIV
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