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Method of preparing nano-crystal titanium oxide colloid used for optoelectronic cell

A technology of nanocrystals and photovoltaic cells, applied in the field of nanomaterials, can solve the problems of incomplete crystallization, instability, and easy stratification of nano-TiO sol, and achieve the effects of rapid response, improved conversion efficiency, and convenient operation

Inactive Publication Date: 2007-10-24
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nano-TiO prepared by the above method 2 Sol has shortcomings such as incomplete crystallization, low concentration, insufficient stability in neutral and alkaline environments, and easy stratification.

Method used

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  • Method of preparing nano-crystal titanium oxide colloid used for optoelectronic cell
  • Method of preparing nano-crystal titanium oxide colloid used for optoelectronic cell
  • Method of preparing nano-crystal titanium oxide colloid used for optoelectronic cell

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] First prepare solution A: add 100 mL of butyl titanate to 200 mL of ethanol solution, then add 20 mL of diethanolamine as a stabilizer, stir vigorously to obtain a light yellow transparent solution. Slowly add 25mL of pure water dropwise into solution A while vigorously stirring to form transparent sol B. Put sol B at a constant temperature of 25°C for 24 hours to obtain uniform TiO 2 Colloid C. TiO 2 Colloid C was refluxed at 150 ° C for 5 h to evaporate to remove residual organic matter, and to obtain nanocrystalline TiO with a mass concentration of about 1%. 2 Solution D. Finally, the solution D was rotary vacuum evaporated for 2h to obtain nanocrystalline TiO with a mass concentration of 15%. 2 colloid. Fig. 2 is the TiO prepared in this embodiment 2 Spherical TiO can be seen in the TEM photo of the colloid after drying 2 Particles, the particle size of which is less than 10nm. Figure 3 is TiO 2 SEM photo of the colloidal coating, nano-TiO can be found 2Th...

Embodiment 2

[0033] First prepare solution A: add 150 mL of butyl titanate to 300 mL of ethanol solution, then add 30 mL of diethanolamine as a stabilizer, stir vigorously to obtain a light yellow transparent solution. Slowly add 37.5mL of pure water dropwise into solution A while vigorously stirring to form transparent sol B. Put sol B at a constant temperature of 25°C for 24 hours to obtain uniform TiO 2 Colloid C. TiO 2 Colloid C was refluxed at 100°C for 2h and evaporated to remove residual organic matter to obtain TiO with a mass concentration of about 1%. 2 Solution D. Add dilute hydrochloric acid to adjust TiO 2 The pH value of the solution was 9-11, and then the solution D was evaporated in a rotary vacuum for 2 hours to obtain nanocrystalline TiO with a mass concentration of 15%. 2 colloid. Description of the prepared nanocrystalline TiO 2 The colloid can adjust different pH values, and it can still maintain uniformity and stability in a weakly acidic environment.

Embodiment 3

[0035] First prepare solution A: add 100 mL of butyl titanate to 200 mL of ethanol solution, then add 20 mL of acrylamide as a stabilizer, stir vigorously to obtain a light yellow transparent solution. Slowly add 25mL of pure water dropwise into solution A while vigorously stirring to form transparent sol B. Put sol B at a constant temperature of 25°C for 24 hours to obtain uniform TiO 2 Colloid C. TiO 2 Colloid C was refluxed at 100°C for 2h and evaporated to remove residual organic matter to obtain TiO with a mass concentration of about 1%. 2 solution. Fig. 6 is the TiO prepared in this embodiment 2 From the XRD spectrum of the sample, it can be seen that the crystallization of titanium oxide is not complete, and there are only a few anatase phase components, indicating that strict control of the reflow temperature and time of the colloid is very important for the crystallization of the sample.

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Abstract

The invention discloses a making method of nanometer crystal TiO2 in the optical battery, which is characterized by the following: adopting butyl titanate as predecessor; adding certain quantity of hydramine alkyl or alkylolamides alkyl into alcohol solution as stabilizer; stirring vigorously; dripping small quantity of pure water; forming transparent sol; forming even TiO2 sol through dispersing sol; refluxing; evaporating residual organics; obtaining 1% transparent solution with grain size of TiO2 particle less than 10nm; adopting anatase phase as main phase; making the particle in the solution not gather due to stabilizer and repulsion load and spatial steric hindrance effect; obtaining the even sol solution with density at 10-20% after rotating and evaporating the transparent solution. The method possesses cheap cost, simple technique, stable quality and friendly environment, which is fit for making silk screen and nanometer crystal TiO2 in the optical battery.

Description

technical field [0001] The invention relates to a preparation method of high-concentration nanocrystalline titanium oxide colloid, more precisely, relates to a preparation method of titanium oxide colloid used in photovoltaic cells. It belongs to the field of nanomaterials. Background technique [0002] Environmental degradation and energy shortages have become prominent problems facing the development of human society, and the development of clean and renewable energy has become a common concern of all countries in the world. Solar energy is an inexhaustible, inexhaustible and safe renewable energy source for human beings. It does not produce any environmental pollution and is a clean energy source. The conversion of solar energy into electricity is the fastest growing and most dynamic research in recent years. With its unique advantages, solar cells surpass wind energy, water energy, geothermal energy, nuclear energy and other resources, and are expected to become the ma...

Claims

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Application Information

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IPC IPC(8): C01G23/053B82B3/00
Inventor 高濂谢晓峰
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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