Abstract
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.
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Funding from DOE grant No. DE FG02 02ER45957 is gratefully acknowledged.
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Narayanaswamy, A., McBride, J., Swafford, L.A. et al. Synthesis and characterization of porous TiO2 with wormhole-like framework structure. J Porous Mater 15, 21–27 (2008). https://doi.org/10.1007/s10934-006-9047-5
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DOI: https://doi.org/10.1007/s10934-006-9047-5