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Fabrication and Characterization of Porous TiO2 Powder by Aerosol Process  

Chang, Han Kwon (Nano-materials Group, Korea Institute of Geoscience and Mineral Resources)
Jang, Hee Dong (Nano-materials Group, Korea Institute of Geoscience and Mineral Resources)
Park, Jin Ho (Department of Chemical and Biomolecular Engineering, Sogang University)
Cho, Kuk (Nano-materials Group, Korea Institute of Geoscience and Mineral Resources)
Kil, Dae Sup (Nano-materials Group, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Korean Chemical Engineering Research / v.46, no.3, 2008 , pp. 479-485 More about this Journal
Abstract
Porous $TiO_2$ nanostructured particles containing both mesopores and macropores were fabricated by utilizing an aerosol templating method from two kinds of starting materials (colloidal mixture of $TiO_2$ nanoparticles and PS particles, and that of TTIP solution and PS particles). The effects of mixing ratio of PS to $TiO_2$ and reactor temperature on the particle properties were investigated. When $TiO_2$ nanoparticles were used as starting materials, the increase of macropores number was observed by SEM and the specific surface area and total pore volume were increased from $31.6m^2/g$ to $39.1m^2/g$ and $0.068cm^3/g$ to $0.089cm^3/g$, respectively, by increasing the weight mixing ratio of $PS/TiO_2$ from 0.79 to 1.31. When TTIP was used as precursor, the specific surface area and mesopore volume of particles prepared at same condition decreased by 67% and 75%, respectively.
Keywords
Aerosol Templating Method; Porous $TiO_2$; Mesopore; Macropore;
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