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Preparation method for low excitation photochromic MoO3 censphere film

A technology of hollow microspheres and excitation light, which is applied in the direction of color-changing fluorescent materials, chemical instruments and methods, can solve the problems that the preparation method has not been reported, and achieve the improvement of photochromic reaction activity, simple method, and obvious specific surface effect Effect

Inactive Publication Date: 2012-01-11
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, MoO with hollow microsphere structure can achieve photochromic performance in a weakly excited state (excitation light source power 3 The preparation method of thin film has not been reported yet

Method used

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  • Preparation method for low excitation photochromic MoO3 censphere film
  • Preparation method for low excitation photochromic MoO3 censphere film
  • Preparation method for low excitation photochromic MoO3 censphere film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] First, add Na 2 MoO 4 Dissolve in double distilled water, make 25mL of 0.2mol / L aqueous solution, fully exchange the solution with cation exchange resin to obtain molybdic acid aqueous solution, add 25mL number average molecular weight drop by drop while stirring at 400r / min It is 2000-5000 polyacrylic acid, then 10mL n-propanol is added dropwise, and then the reaction system is stirred and homogenized for 4h to form a sol, and it is placed in the dark to stand for 24h. The glass substrate is washed with water to remove surface stains, then soaked in acid, then boiled with distilled water, then washed with alcohol and dried with alcohol to make the substrate clean. Then the glass substrate was immersed in the sol, and the glass substrate was coated with a dipping and pulling method at a pulling speed of 20mm / s for 120s, and then the glass substrate was dried at 50°C. Finally, put the coated glass slide in a resistance furnace and heat it to 200℃ for 1h, then heat it to 3...

Embodiment 2

[0026] First, change K 2 MoO 4 Dissolve in double distilled water, make up 25mL of 0.05mol / L aqueous solution, fully exchange the solution with cation exchange resin to obtain molybdic acid aqueous solution, add 20mL number average molecular weight dropwise while stirring at 300r / min Is 2000-5000 polyacrylic acid, and then add 30mL n-propanol dropwise. Then, the reaction system was stirred and homogenized for 5 hours to form a sol. The glass substrate was treated in the same manner as in Example 1 to make it clean, and then the glass substrate was immersed in the sol, and the dipping method was used to extract 23mm / s. The drawing speed is to coat the glass substrate with a coating time of 130s, and then the glass substrate is dried at 70°C. Finally, the coated glass slide is placed in a resistance furnace to first heat up to 180°C for 50 minutes, and then to 650°C at a rate of 12°C / min, hold for 1 hour, and sinter under these conditions to obtain photochromic MoO 3 film. Using...

Embodiment 3

[0028] First, the (NH 4 ) 2 MoO 4 Dissolve in double distilled water, make up 25mL of 2.5mol / L aqueous solution, fully exchange the solution with cation exchange resin to obtain molybdic acid aqueous solution, under stirring at 200r / min, add 12.5mL number average dropwise Polyacrylic acid with a molecular weight of 2000-5000 is then added dropwise to 5 ml of n-propanol. Then, the reaction system was stirred and homogenized for 3.5 hours to form a sol, and it was placed in a dark place to stand for 24 to 48 hours. Treat the glass substrate to make it clean by the same method as in Example 1, and then immerse the glass substrate in the sol, and coat the glass substrate with a dipping and pulling method at a pulling speed of 15mm / s. The immersion time is 110s. , And then dry the glass substrate at 65°C. Finally, the coated glass slide is placed in a resistance furnace and heated to 150°C for 1.5h, then heated to 450°C at a rate of 8°C / min for 1.5h, and sintered under this conditi...

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Abstract

The invention discloses a preparation method for a low excitation photochromism MoO3 cenosphere film. The preparation method comprises the following steps: preparing a 0.05 to 3mol / L molyadate aqueous solution into a molybdic acid aqueous solution through an ion-exchange method, adding a nucleating agent under the condition of agitation, then adding a stabilizer, setting the volume ratio of the nucleating agent to the stabilizer to the molybdic acid aqueous solution to be 0.1-1.0:0.1-2.0:1.0, and forming a sol through agitation and homogenization, wherein the nucleating agent is a polyelectrolyte which has a number-average molecular weight of 2,000 to 5,000, is mutually dissolved with water and is easily decomposed below 300 DEG C; the stabilizer is normal propanol, monoethanolamine, diethanolamine, triethanolamine or acetylacetone. The preparation method further comprises the following steps: plating a film on a clean inorganic non-metal substrate through the sol, drying the film at a temperature of between 40 and 70 DEG C, then heating up the film to between 100 and 200 DEG C and holding the temperature for 0.5 to 3.0 hours, then heating up the film to between 300 and 700 DEG C at a velocity less than or equal to 15 DEG C / min, and holding the temperature for no less than 0.5 hour to obtain the MoO3 cenosphere film. The MoO3 film has a good low excitation photochromism; and the method is simple and the cost is low.

Description

Technical field [0001] The invention relates to a photochromic MoO 3 The preparation method of the film, in particular relates to a weakly excited photochromic MoO with hollow microspheres 3 Film preparation method. Background technique [0002] MoO 3 It is an important new semiconductor material, which is caused by the distorted [MoO 6 ] The layered structure of the octahedral framework, Mo atoms occupy the corners of the cube, O atoms bisect the edges, and the central atom is vacant. Therefore, it has excellent electrochromic, gastrochromic, photochromic and other color changing properties. Among them, the research on properties such as electrochromic and gas-induced discoloration has been reported, especially the research of electrochromic performance has obtained relevant application results. At the same time, due to MoO 3 With photochromic properties, it has huge potential application prospects in many research fields such as large-screen display, high-density storage, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/23C09K9/00C04B41/50
Inventor 沈毅王萍萍黄荣颜莎宁李珍
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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