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- W2017285492 abstract "Abstract Ti(OPri)4 vapor was pyrolyzed in dry nitrogen atmosphere using a simple tubular flow reactor at 400 and 800 °C. Well-defined spheroidal anatase TiO2 particles showing mesoporous surfaces of 30 m2 g−1 and assuming two different morphologies (fused and composite) were produced at the low temperature (ca. 400 °C), whereas deformed spheroidal particles of rutile-structured TiO2 and surfaces of 12 m2 g−1 were obtained at the high temperature (ca. 800 °C). Particles of the high-temperature product were distinguished by a low porosity and a uniform morphology (composite). The heat-induced modifications at 800 °C may be ascribed to enhancements in 1. (a) hydrolysis of Ti(OPri)4, by a possible generation of water vapor as a secondary pyrolysis product of the alkoxide. 2. (b) particle growth via coalescence rather than by vapor deposition, and 3. (c) particle sintering. The pyrolysis products were characterized by X-ray diffractometry, high-resolution transmission electron microscopy, and volumetry of nitrogen adsorption at liquid nitrogen temperature." @default.
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- W2017285492 date "1997-07-01" @default.
- W2017285492 modified "2023-09-26" @default.
- W2017285492 title "Texture and morphology of titania particles prepared by vapor-phase pyrolysis of titanium tetra-isopropoxide" @default.
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- W2017285492 doi "https://doi.org/10.1016/s0165-2370(97)00023-5" @default.
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