Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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: 2009-10-14
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
View PDF6 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Examples

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, and 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. figure 2 TiO prepared for this example 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. image 3 TiO 2 SEM photo of the colloidal coating, nano-TiO can be found 2 The thin...

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. Figure 6 TiO prepared for this example 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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing nano-crystal TiO2 colloid used in photovoltaic cells. The main feature is to use butyl titanate as the precursor, add a certain amount of alkanolamine or alkanolamide as a stabilizer to the ethanol solution, add a small amount of pure water dropwise under vigorous stirring, and form a transparent sol, which is dispersed by peptization The process generates uniform TiO2 colloid, reflux evaporation to remove residual organic matter, and obtain a transparent solution with a mass concentration of about 1%, in which the particle size of TiO2 particles is less than 10nm, and the main phase is anatase phase. Due to the presence of stabilizers, the particles in the solution Due to charge repulsion and steric hindrance effect, it is not easy to agglomerate, so the transparent solution can be rotated and distilled to obtain a uniform colloidal solution of nanocrystals suitable for photovoltaic cells with a mass percentage concentration of 10%-20%TiO2. The method has the obvious advantages of low cost, simple process, stable quality, and environmental friendliness, and is a method suitable for screen printing to prepare nanocrystalline TiO2 colloid suitable for photovoltaic cells.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B82B3/00
Inventor 高濂谢晓峰
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com