Synthesis method of photochromic titanium dioxide sol

A technology of titanium dioxide and synthesis methods, applied in chemical instruments and methods, color-changing fluorescent materials, etc., can solve problems that limit the practical application of color-changing materials

Inactive Publication Date: 2007-02-28
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, many materials with photochromic / electrochromic properties only have photochromic responses to ultraviolet light (energy > 3.2eV), and ultraviolet light only accounts for a small part of the energy of the entire solar spectrum, and most cheap commercial lasers on the market are are visible light lasers, which limit the practical application of color-changing materials

Method used

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  • Synthesis method of photochromic titanium dioxide sol

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Experimental program
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Effect test

Embodiment 1

[0016] At room temperature, under the condition of magnetic stirring, titanium tetrachloride (TiCl 4 ) was slowly added dropwise to the ethanol solution dissolved in triethanolamine (TEA). The reaction is violent, a large amount of heat is released, and a large amount of acid mist is formed, forming a pasty complex. TiCl 4 The substance ratio with TEA is 1:2, ethanol is used as solvent, and its volume is 3 times that of triethanolamine. After the complex was kept at about 30°C for a period of time, deionized water was added to dissolve it to form a saturated solution. Under the condition of magnetic stirring, 5 ml of the prepared saturated solution was added dropwise to 100 ml of AMP95 aqueous solution with a mass percentage concentration of 1.5% to obtain nano anatase titanium dioxide sol. The beaker containing the sol was placed on the windowsill, and it was found that the titanium dioxide sol on the side of the beaker near the window turned purple-black.

Embodiment 2

[0018] At room temperature, under the condition of magnetic stirring, titanium tetrachloride was slowly added dropwise to the ethanol solution dissolved with triethanolamine. The reaction is violent, a large amount of heat is released, and a large amount of acid mist is formed, forming a pasty complex. TiCl 4 The substance ratio with TEA is 1:2, ethanol is used as solvent, and its volume is 3 times that of triethanolamine. After the complex is kept at about 20°C for a period of time, it is dissolved in deionized water to form a saturated solution. Under the condition of magnetic stirring, 2ml of the prepared saturated solution was added dropwise to the AMP95 aqueous solution with a mass percentage concentration of 2% and 100ml to obtain nano-anatase titanium dioxide sol. The beaker containing the sol was placed on the windowsill, and it was found that the titanium dioxide sol on the side of the beaker near the window turned purple-black.

Embodiment 3

[0020] At room temperature, under the condition of magnetic stirring, titanium tetrachloride was slowly added dropwise to the ethanol solution dissolved with triethanolamine. The reaction is violent, a large amount of heat is released, and a large amount of acid mist is formed, forming a pasty complex. TiCl 4 The substance ratio with TEA is 1:2, ethanol is used as solvent, and its volume is 3 times that of triethanolamine. After the complex is kept at about 60°C for a period of time, it is dissolved in deionized water to form a saturated solution. Under the condition of magnetic stirring, 10 ml of the prepared saturated solution was added dropwise to 100 ml of AMP95 aqueous solution with a mass percentage concentration of 0.5% to obtain nano anatase titanium dioxide sol. The beaker containing the sol was placed on the windowsill, and it was found that the titanium dioxide sol on the side of the beaker near the window turned purple-black.

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Abstract

The invention discloses a method for synthesizing photochromism titanic anhydride. The method comprises the following steps: at normal temperature, at the condition of magnetic stirring, putting titanic chloride alcoholic solution with triethanolamine, getting pasty complex compound; The ratio of titanic chloride and triethanolamine being 1:2, using alcohol as dissolvant, and the volume of alcohol being 3 times than triethanolamine; keeping the complex compound at 20-60Deg.C for spell of time, adding deionized water to get saturated solution, at the condition of magnetic stirring, dipping the saturated solution into the AMP95 solution whose mass concentration is 0.5-2%, and getting nanometer octahedrite titanii oxydum gel; putting the gel on the window sill, then the titanii oxydum gel near the window becoming atropurpureus.

Description

technical field [0001] The invention relates to a method for synthesizing photochromic titanium dioxide sol. Background technique [0002] In recent years, transition metal oxides have attracted attention due to their high optical contrast and good chromogenic stability, and they have applications in image display, information storage and recording, variable reflectivity mirrors, and energy-efficient smart windows. With good application prospects, researchers at home and abroad have carried out extensive and in-depth research on new photo / electrochromic materials. There are many types of photochromic organic compounds, and one of the photochromic mechanisms is caused by the change of the structure of the material under illumination. Inorganic compound photochromic materials mainly focus on transition metal oxides. Compared with organic photochromic materials, inorganic compound photochromic materials have good stability and low cost, but their photochromic efficiency is po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/00
Inventor 陈建军王耐艳王勇祝洪良金达莱杜平凡姚奎鸿
Owner ZHEJIANG SCI-TECH UNIV
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