Morphology of TiO2 Aerogels. 1. Electron Microscopy

Autor:	Zhu Zhu, Micha Tomkiewicz, Lancy Y. Tsung
Rok vydání:	1995
Předmět:	Anatase Morphology (linguistics) General Engineering Nanoparticle Microstructure law.invention chemistry.chemical_compound Crystallography Surface area chemistry Chemical engineering law Titanium dioxide Physical and Theoretical Chemistry Electron microscope Porosity
Zdroj:	The Journal of Physical Chemistry. 99:15945-15949
ISSN:	1541-5740 0022-3654
DOI:	10.1021/j100043a037
Popis:	The microstructural characteristics of titanium dioxide (TiO{sub 2}) aerogels were studied by electron microscopies augmented by other techniques such as nitrogen adsorption and X-ray diffraction. We show that the structure can be characterized by two length scales: 5 nm diameter crystalline nanoparticles of anatase closely packed into mesoaggregates of 50 nm. The mesoaggregates are, in turn, packed to a loosely linked structure with an overall porosity of 80%. The total surface area of the aerogels is attributed to the sum of the surfaces of the nanoparticles. 14 refs., 11 figs.
Databáze:	OpenAIRE
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