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 l

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

Example Embodiment

[0040] Example 1

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

[0042] Take a single-sided frosted glass, and ultrasonically clean it with acetone, anhydrous ethanol and deionized water for 15 minutes in turn. After cleaning and drying, the rough frosted surface is facing down at 45°, and placed in a 100 mL polytetrafluoroethylene lining, and then the precursor solution is added. Transfer to the inner lining, seal the reaction kettle and keep it at 200 °C for 12 hours. After the reaction, cool it to room temperature naturally, take out the immobilized product and place it in a drying box, and dry it at 60 °C for 10-12 hours at atmospheric pressure to obtain the original glass frosted surface. In-situ grown tungsten trioxide nanosheet arrays.

[0043] Ta...

Example Embodiment

[0048] Example 2

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

[0050] Take a single-sided frosted glass, and ultrasonically clean it with acetone, anhydrous ethanol and deionized water for 15 minutes in turn. After cleaning and drying, the rough frosted surface is facing down at 45°, and placed in a 100 mL polytetrafluoroethylene lining, and then the precursor solution is added. Transfer to the inner lining, seal the reaction kettle and keep it at 200 °C for 12 hours. After the reaction, cool it to room temperature naturally, take out the immobilized product and place it in a drying box, and dry it at 60 °C for 10-12 hours at atmospheric pressure to obtain the original glass frosted surface. In-situ grown tungsten trioxide nanosheet arrays.

Example Embodiment

[0051] Example 3

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

[0053] Take a single-sided frosted glass, and ultrasonically clean it with acetone, anhydrous ethanol and deionized water for 15 minutes in turn. After cleaning and drying, the rough frosted surface is facing down at 45°, and placed in a 100 mL polytetrafluoroethylene lining, and then the precursor solution is added. Transfer to the inner lining, seal the reaction kettle and keep it at 200 °C for 12 hours. After the reaction, cool it to room temperature naturally, take out the immobilized product and place it in a drying box, and dry it at 60 °C for 10-12 hours at atmospheric pressure to obtain the original glass frosted surface. In-situ grown tungsten trioxide nanosheet arrays.

[0054] Si...

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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
CPCC03C17/25B01J23/30B01J35/004B01J35/0013C03C2217/219C03C2217/71C03C2218/111
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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