Titania-Silica Aerogel Monolith with Ordered Mesoporosity and Preparation Thereof具有規則中孔結構的氧化鈦 - 氧化硅氣凝膠獨石材料及其制備方法
After the outbreak of SARS and other airborne diseases happened recently in Hong Kong, awareness of public about the indoor air quality is aroused. Air purifier, air handling appliances like fan and air conditioner; as well as catalytic reaction to produce fine chemicals all related to the use of SiO2 aerogel.
The present invention relates to TiO2-SiO2 aerogel and the process of producing it. In particular, it relates to a freestanding monolithic TiO2-SiO2 aerogel with an ordered mesoporosity. Generally, aerogels are prepared from molecular precursors via sol-gel method and following supercritical drying processing to exchange the pore liquid with air while maintaining the filigrane solid network. Aerogels that are not purely made from SiO2 are useful for many applications, for example, for embedding catalysts. The monolithic form prevents nanoparticles from delamination, in particular, in the indoor air quality control by gas-phase photocatalytic oxidation reaction.
Catalysts embedded in monolithic aerogel help to overcome the practical drawbacks of the fine powder, including the difficult separation and handling for liquid-phase reactions or large pressure drops for gas phase reactions. It makes such aerogel monolith easily and economically.
1. Ordered mesoporosity
2. Large surface area
3. Capable of enduring high temperatures
4. Adsorption for gaseous pollutants
5. Conversion of gaseous pollutants into harmless CO2 and H2O
- Air purifier
- Air handling appliances
- Catalytic reaction to produce fine chemicals
Patent Number: HK1102393A1
Application Number: HK2007110556A
Inventor: YEUNG KING LUN | YAO NAN | CAO SHENGLI
Priority Date: 29 Nov 2005
Priority Number: HK1102393A1
Application Date: 28 Sep 2007
Publication Date: 23 Dec 2011
Assignee Applicant: The Hong Kong University of Science & Technology
Title: TITANIA-SILICA AEROGEL MONOLITH WITH ORDERED MESOPOROSITY AND PREPARATION THEREOF
Usefulness: TITANIA-SILICA AEROGEL MONOLITH WITH ORDERED MESOPOROSITY AND PREPARATION THEREOF
Summary: As catalyst for increasing chemical reaction (claimed), in aerospace technology for storage, thickening or transport of rocket fuels and outside layer of spacecraft.
Novelty: Titanium dioxide-silica aerogel monolith useful as e.g. catalyst for increasing chemical reaction or in aerospace technology comprises titania in specific amount and has a defined regular shape
化工/材料
化学成分
28 Sep 2007
Hong Kong 07110556.8
Hong Kong HK1102393
TTC.PA.259
香港
