Evaluation of the performance of mesoporous aerogel as a catalytic filter for treatment of airborne pollutants

ENVR 114

Shengli Cao, egcaosl@ust.hk1, King Lun Yeung, kekyeung@ust.hk1, Joseph K. C. Kwan, joekwan@ust.hk2, Samuel C. T. Yu, samyu@ust.hk2, and Wai Kin Leung, leungkin@ust.hk3. (1) Department of Chemical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, (2) Safety and Environmental Protection Office, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, (3) Environmental Engineering Program, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
Freestanding, crack-free mesoporous silica/titania-silica aerogels were prepared in this work. They exhibited good permeability for gases owing to the open pore structure. They were effective to filter off aerosols (0.28 μm oil droplets) and natural airborne bioaerosols. The presence of TiO2 nanodomains led to good photocatalytic activity and rapid deactivation of microorganisms on the aerogel surface.
 

General Papers
6:00 PM-8:00 PM, Wednesday, August 22, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Environmental Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007