Synthesis and characterization of porous TiO2 with wormhole-like framework structure

Journal Article · Tue Jan 01 00:00:00 EST 2008 · Journal of Porous Materials

DOI:https://doi.org/10.1007/s10934-006-9047-5· OSTI ID:931127

Narayanaswamy, A. ^[1]; McBride, J. ^[1]; Swafford, L. A. ^[1]; Dhar, S. ^[1]; Budai, John D ^[2]; Feldman, Leonard C. ^[1]; Rosenthal, Sandra ^[1]

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1. Vanderbilt University
2. ORNL

A fast and reliable synthetic route for preparing contaminant-free porous TiO2 with a wormhole-like framework and close packed macropores is demonstrated based on a sol-gel process involving acid hydrolysis of an alkoxide in the presence of a cationic surfactant. Powder X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements have been used to characterize the porous structure and the crystallinity. The XRD patterns, TEM and scanning electron microscopy (SEM) images confirm that these materials have disordered wormhole-like topology with close-packed nearly hexagonal macropores. The mesopore diameters and surface area of titanium dioxide, evaluated from the N2-sorption isotherms, indicate average pore diameters of about 7 and 6 nm and surface areas of about 100 and 335 m2/g, for as-prepared and calcined samples at 400 C.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 931127
• Journal Information: Journal of Porous Materials, Vol. 15, Issue 1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
TITANIUM OXIDES
POROUS MATERIALS
SYNTHESIS
CRYSTAL STRUCTURE
PORE STRUCTURE
SURFACE AREA
ACID HYDROLYSIS
SOL-GEL PROCESS