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Tungsten oxide-polypyrrole core-shell heterostructure nanowires and preparation method thereof

A technology of tungsten oxide nanowires and polypyrrole core-shell, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of unstable performance of core-shell materials, and achieve the effect of easy control of process parameters, convenient operation, and simple equipment

Active Publication Date: 2021-09-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention overcomes the deficiencies in the prior art, and provides a tungsten oxide-polypyrrole core-shell heterostructure nanowire and its preparation method, and realizes uniform pyrrole on the surface of the one-dimensional nanowire through an optimized pyrrole polymerization process. Polymerization to prepare one-dimensional tungsten oxide / polypyrrole core-shell heterostructure nanowires with uniform polypyrrole shell coverage and adjustable shell morphology Unstable properties of core-shell materials caused by poor controllability

Method used

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  • Tungsten oxide-polypyrrole core-shell heterostructure nanowires and preparation method thereof
  • Tungsten oxide-polypyrrole core-shell heterostructure nanowires and preparation method thereof
  • Tungsten oxide-polypyrrole core-shell heterostructure nanowires and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] (1) Preparation of tungsten oxide nanowires by solvothermal method

[0030] The tungsten hexachloride powder was added to 60 ml of cyclohexanol, and magnetically stirred for 20 minutes to completely dissolve the tungsten hexachloride powder to obtain a uniform solution with a tungsten hexachloride concentration of 0.005 mol / L. The cyclohexanol solution of the tungsten hexachloride was transferred into a high-pressure reaction kettle lined with polytetrafluoroethylene, and after sealing, the reaction kettle was placed in an oven for heating to carry out solvothermal reaction, and the oven working temperature was 200 ° C, and the heating time for 6h.

[0031] (2) Cleaning of tungsten oxide nanowires

[0032] After the solvothermal reaction was completed, the autoclave was naturally cooled to room temperature, the reaction kettle was taken out, and the blue solid-liquid reactant in the reaction kettle was centrifuged, and the rotation speed of the centrifuge was set to 50...

Embodiment 2

[0039] (1) Preparation of tungsten oxide nanowires by solvothermal method

[0040] The tungsten hexachloride powder was added to 60 ml of cyclohexanol, and the tungsten hexachloride powder was completely dissolved by magnetic stirring for 10 minutes to obtain a uniform solution with a tungsten hexachloride concentration of 0.005 mol / L. The cyclohexanol solution of the tungsten hexachloride was transferred to an autoclave lined with polytetrafluoroethylene. After sealing, the reactor was placed in an oven for heating to carry out solvothermal reaction. The oven working temperature was 180° C., and the heating time is 9h.

[0041] (2) Cleaning of tungsten oxide nanowires

[0042] After the solvothermal reaction was completed, the autoclave was naturally cooled to room temperature, the reaction kettle was taken out, and the blue solid-liquid reactant in the reaction kettle was centrifuged, and the rotation speed of the centrifuge was set to 4000 r / min. The solid obtained by cen...

Embodiment 3

[0050] (1) Preparation of tungsten oxide nanowires by solvothermal method

[0051] The tungsten hexachloride powder was added to 60 ml of cyclohexanol, and magnetically stirred for 40 minutes to completely dissolve the tungsten hexachloride powder to obtain a uniform solution with a tungsten hexachloride concentration of 0.005 mol / L. The cyclohexanol solution of tungsten hexachloride was transferred to an autoclave lined with polytetrafluoroethylene. After sealing, the autoclave was heated in an oven for solvothermal reaction. The oven working temperature was 220°C, and the heating time for 7h.

[0052] (2) Cleaning of tungsten oxide nanowires

[0053] After the solvothermal reaction was completed, the autoclave was naturally cooled to room temperature, the reaction kettle was taken out, and the blue solid-liquid reactant in the reaction kettle was centrifuged, and the rotation speed of the centrifuge was set to 6000 r / min. The solid obtained by centrifugation was washed twi...

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Abstract

The invention discloses tungsten oxide-polypyrrole core-shell heterostructure nanowires and a preparation method thereof. The tungsten oxide nanowire suspension is dropped dropwise into the pyrrole polymerization reaction liquid, and concentrated hydrochloric acid is added dropwise to the above mixed solution to adjust The pH of the above mixed solution is 1-4, continue magnetic stirring for 0.5-3h, then dropwise add ammonium persulfate solution to the above solution, continue to stir for 1-5h, after separation, cleaning and drying, tungsten oxide / Polypyrrole heterogeneous core-shell nanowires. Through an optimized pyrrole polymerization process, pyrrole is uniformly polymerized on the surface of one-dimensional nanowires, thereby preparing a one-dimensional tungsten oxide / polypyrrole core-shell heterostructure nanostructure with uniform polypyrrole shell coverage and adjustable shell morphology. Line, to overcome the problem of unstable performance of the core-shell material caused by the poor shape controllability of the polymer shell film prepared by the traditional liquid phase polymerization method.

Description

technical field [0001] The invention belongs to the technical field of one-dimensional structure inorganic / organic heterogeneous nanocomposite materials, and more particularly relates to a one-dimensional tungsten oxide / polypyrrole core-shell heterostructure nanowire with high consistency and uniformity and its preparation method. Background technique [0002] At present, non-renewable energy sources are decreasing day by day, and the atmospheric environment is gradually deteriorating. Faced with the increasingly serious energy shortage and air pollution, the development and utilization of renewable energy and the reliable detection of toxic and harmful gases have become increasingly urgent. With the development of materials science, low-dimensional nanomaterials have been widely concerned and applied in the fields of energy and environment due to their unique properties. [0003] Low-dimensional nanomaterials include zero-, one-, and two-dimensional materials. Due to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/00
CPCG01N27/00
Inventor 秦玉香张天一王克行刘雕
Owner TIANJIN UNIV
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