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Tungsten trioxide/polyaniline core-shell nanowire array radiochromic film and preparation method thereof

A core-shell nano- and tungsten trioxide technology, applied in chemical instruments and methods, nanotechnology, nano-optics, etc., can solve the problems of low specific surface area of ​​ion diffusion, unsatisfactory electrochromic performance, and small spectral adjustment range. Improve the specific surface area, rich variety of color changes, and wide spectrum adjustment range

Active Publication Date: 2013-12-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tungsten trioxide (WO 3 ) As an inorganic electrochromic material, it has the advantages of stable chemical properties and strong binding force with the substrate, but has the disadvantages of single color change and slow color change
However, it is a mixed structure, the efficiency of ion diffusion and the specific surface area of ​​the reaction are low, the spectrum adjustment range is small, and the electrochromic performance is not ideal, which needs to be further improved.

Method used

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  • Tungsten trioxide/polyaniline core-shell nanowire array radiochromic film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] 1) Clean the FTO conductive glass (Shenzhen Disprey Photoelectric Material Co., Ltd., Rs≤10ohmTr>85%) with acetone, deionized water and ethanol for 10 minutes, and blow it with nitrogen to get a clean FTO conductive glass ;

[0042] 2) Drop excess concentrated hydrochloric acid (10mol / L) into 1mol / L sodium tungstate aqueous solution until no new precipitates are formed, wash the precipitates with deionized water, and the milky white to pale yellow colloidal precipitates obtained after washing are White tungstic acid, the obtained white tungstic acid is dissolved in an aqueous hydrogen peroxide solution with a mass percentage of hydrogen peroxide of 30%, the molar ratio of white tungstic acid to hydrogen peroxide in an aqueous hydrogen peroxide solution is 1:3, and deionized Water is prepared into peroxide tungstic acid solution containing tungsten at a concentration of 3mol / L, and refrigerated at 4°C for later use;

[0043] 3) Spin-coat the peroxide tungstic acid solut...

Embodiment 2

[0056] 1) Clean the FTO conductive glass (Shenzhen Disprey Photoelectric Material Co., Ltd., Rs≤10ohmTr>85%) with acetone, deionized water and ethanol for 10 minutes, and blow it with nitrogen to get a clean FTO conductive glass ;

[0057] 2) Drop excess concentrated hydrochloric acid (10mol / L) into 1mol / L sodium tungstate aqueous solution until no new precipitates are formed, wash the precipitates with deionized water, and the milky white to pale yellow colloidal precipitates obtained after washing are White tungstic acid, the obtained white tungstic acid is dissolved in an aqueous hydrogen peroxide solution with a mass percentage of hydrogen peroxide of 30%, the molar ratio of white tungstic acid to hydrogen peroxide in an aqueous hydrogen peroxide solution is 1:3, and deionized Water is prepared into peroxide tungstic acid solution containing tungsten at a concentration of 3mol / L, and refrigerated at 4°C for later use;

[0058] 3) Spin-coat the peroxide tungstic acid solut...

Embodiment 3

[0068] 1) Clean the FTO conductive glass (Shenzhen Disprey Photoelectric Material Co., Ltd., Rs≤10ohmTr>85%) with acetone, deionized water and ethanol for 10 minutes, and blow it with nitrogen to get a clean FTO conductive glass ;

[0069] 2) Drop excess concentrated hydrochloric acid (10mol / L) into 1mol / L sodium tungstate aqueous solution until no new precipitates are formed, wash the precipitates with deionized water, and the milky white to pale yellow colloidal precipitates obtained after washing are White tungstic acid, the obtained white tungstic acid is dissolved in an aqueous hydrogen peroxide solution with a mass percentage of hydrogen peroxide of 30%, the molar ratio of white tungstic acid to hydrogen peroxide in an aqueous hydrogen peroxide solution is 1:3, and deionized Water is prepared into peroxide tungstic acid solution containing tungsten at a concentration of 3mol / L, and refrigerated at 4°C for later use;

[0070] 3) Spin-coat the peroxide tungstic acid solut...

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Abstract

The invention provides a tungsten trioxide / polyaniline core-shell nanowire array radiochromic film and a preparation method thereof. The preparation method comprises the following steps: dissolving white tungstic acid in aqueous hydrogen peroxide liquor to prepare peroxide tungstate liquor; coating the peroxide tungstate liquor on an electric conductive face of a clean electric conductive substrate; dissolving tungstate in alcohol to form precursor liquor, fixing the electric conductive substrate in a reaction kettle, adding the precursor liquor into the reaction kettle, carrying out a reaction at 150-250 DEG C for 8-16 hours, and taking out and carrying out thermal treatment at 300-450 DEG C for 1-3 hours to obtain a tungsten trioxide nanowire array; and mixing aniline and dilute sulphuric acid to form electrolyte for preparing polyaniline and carrying out electro-polymerization on polyaniline to obtain the tungsten trioxide / polyaniline core-shell nanowire array radiochromic film. The preparation process is convenient to control, lower in preparation cost and easy to realize industrialization. The film has the advantages of large spectrum adjustment range, abundant radiochromic types, high coloring efficiency, fast response speed, long cycle life and the like.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a tungsten trioxide / polyaniline core-shell nanowire array color-changing film and a preparation method thereof. Background technique [0002] Electrochromics (EC) is a phenomenon in which the optical properties of materials undergo reversible changes under the action of an external electric field. Electrochromic devices only need a very low voltage (about 2V) to work, and can maintain the original coloring or fading state for a long time in an open circuit state, so the energy consumption is relatively small. Electrochromic devices (ECD) are expected to be used in building energy-saving windows, automotive anti-glare rearview mirrors, display devices, variable transmittance glasses, automotive sunroofs, and surface temperature control of spacecraft. Electrochromic materials are generally divided into three types, namely, inorganic electrochromic materials (usually transition ...

Claims

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Application Information

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IPC IPC(8): C25D9/02C08G73/02C09K9/00B82Y40/00B82Y30/00B82Y20/00
Inventor 王秀丽蔡国发周鼎谷长栋涂江平
Owner ZHEJIANG UNIV
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