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Immobilized tungsten trioxide nanosheet array as well as preparation method and application thereof

A nanosheet array, tungsten trioxide technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., to achieve good crystallinity, strong operability, and size distribution uniform effect

Pending Publication Date: 2020-08-21
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the research on the preparation of immobilized tungsten trioxide array structure has a certain foundation, the one-step solvothermal method without seed layer and no shape control agent can realize the tungsten trioxide array structure on the substrate more conveniently, economically and greenly. growth remains challenging

Method used

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  • Immobilized tungsten trioxide nanosheet array as well as preparation method and application thereof
  • Immobilized tungsten trioxide nanosheet array as well as preparation method and application thereof
  • Immobilized tungsten trioxide nanosheet array as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 0.793g WCl 6 The powder was dissolved in 50ml of n-propanol, placed on a magnetic stirrer with a rotation speed of 350rpm, and stirred for 80min in an air atmosphere to fully dissolve, and a precursor solution with a concentration of 0.04mol / L was obtained.

[0042] Take one-sided frosted glass, and ultrasonically clean it with acetone, absolute ethanol, and deionized water for 15 minutes in sequence. After cleaning and drying, the rough frosted surface faces downward at 45°, and put it in a 100mL polytetrafluoroethylene liner, and then add the precursor solution Transfer to the lining, seal the reaction kettle and keep it warm at 200°C for 12h. After the reaction, cool down to room temperature naturally, take out the immobilized product and place it in a drying oven, and dry it at 60°C for 10-12h under atmospheric pressure to obtain the raw material on the glass frosted surface. In-situ grown tungsten trioxide nanosheet arrays.

[0043] Take the single-sided fro...

Embodiment 2

[0049] Weigh 1.190g WCl 6 The powder was dissolved in 50ml of n-propanol, placed on a magnetic stirrer with a rotation speed of 350rpm, and stirred for 80min in an air atmosphere to fully dissolve it to obtain a precursor solution with a concentration of 0.06mol / L.

[0050] Take one-sided frosted glass, and ultrasonically clean it with acetone, absolute ethanol, and deionized water for 15 minutes in sequence. After cleaning and drying, the rough frosted surface faces downward at 45°, and put it in a 100mL polytetrafluoroethylene liner, and then add the precursor solution Transfer to the lining, seal the reaction kettle and keep it warm at 200°C for 12h. After the reaction, cool down to room temperature naturally, take out the immobilized product and place it in a drying oven, and dry it at 60°C for 10-12h under atmospheric pressure to obtain the raw material on the glass frosted surface. In-situ grown tungsten trioxide nanosheet arrays.

Embodiment 3

[0052] Weigh 1.586g WCl 6 The powder was dissolved in 50ml of n-propanol, placed on a magnetic stirrer with a rotation speed of 350rpm, and stirred for 80min in an air atmosphere to fully dissolve it to obtain a precursor solution with a concentration of 0.08mol / L.

[0053] Take one-sided frosted glass, and ultrasonically clean it with acetone, absolute ethanol, and deionized water for 15 minutes in sequence. After cleaning and drying, the rough frosted surface faces downward at 45°, and put it in a 100mL polytetrafluoroethylene liner, and then add the precursor solution Transfer to the lining, seal the reaction kettle and keep it warm at 200°C for 12h. After the reaction, cool down to room temperature naturally, take out the immobilized product and place it in a drying oven, and dry it at 60°C for 10-12h under atmospheric pressure to obtain the raw material on the glass frosted surface. In-situ grown tungsten trioxide nanosheet arrays.

[0054] Simulating visible light irrad...

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Abstract

The invention discloses an immobilized tungsten trioxide nanosheet array and a preparation method and application thereof. The preparation method comprises the steps that a tungsten source is dissolved in an organic solvent to obtain a precursor solution with the molar concentration of tungsten ions being 0.02-0.08 mol / L, then a substrate material is placed in the precursor solution, and a heatingreaction is conducted after sealing to obtain the immobilized tungsten trioxide nanosheet array. According to the one-step solvothermal method provided by the invention, the immobilized tungsten trioxide nanosheet array is prepared on a substrate material, a template agent, a shape control agent and a seed crystal layer are not introduced, the process is simple, green and environment-friendly, the raw materials are easy to obtain, the cost is relatively low, and the operability is high; the used substrate material is single-sided frosted glass, is easy to obtain and low in cost, has chemicalinertness and mechanical stability, and can bear high temperature; and the prepared immobilized tungsten trioxide nanosheet array is good in crystallinity, stable in morphology, uniform in size distribution, good in photocatalytic performance and convenient to recycle, and the environmental problem caused by a powdery nano tungsten trioxide material can be well solved.

Description

technical field [0001] The invention relates to the technical field of preparation of nanomaterials, in particular to a solid-supported tungsten trioxide nanosheet array and a preparation method and application thereof. Background technique [0002] Tungsten trioxide (WO 3 ) is a potential n-type semiconductor material after titanium dioxide. Its band gap is narrower (2.4-2.8eV), and the photoresponse band is longer, which increases the utilization rate of light. In addition, it also has light corrosion resistance, good photostability, The advantages of non-toxic and low cost. In addition to applications in the field of photocatalysis, WO 3 It can also be applied to fields such as electrochromic and sensors, and shows broad application prospects in environmental protection and restoration, electrochromic devices, and human health. [0003] Nanomaterials often have unique properties different from bulk materials. When the size of the material reaches the micron or nanoscal...

Claims

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Application Information

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IPC IPC(8): C03C17/25B01J23/30
CPCC03C17/25B01J23/30C03C2217/219C03C2217/71C03C2218/111B01J35/23B01J35/39
Inventor 席晓丽沈越岗刘阳思赵林艳樊佑书聂祚仁
Owner BEIJING UNIV OF TECH
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