Preparation and Characterization of H2Ti4O9 Nanocrystals

doi:10.3724/SP.J.1077.2007.00843

Abstract

Abstract: H₂Ti₄O₉ nanocrystals with high specific surface areas were prepared by delamination and precipitation process through ball milling combined with ion exchange reaction. The samples were characterized by X-ray powder diffraction, transmission electron microscope, thermal analysis, N₂ adsorption-desorption isotherm, and absorption spectrum. The crystallites of Ti₄O₉^2- in the form of titania nanosheets have lateral size less than 50nm. The specific surface area of H₂ Ti₄O₉nanocrystals depends on pH values of precipitation solution and ball milling time. The specific surface area of H₂ Ti₄O₉ nanocrystals prepared by ball-milling of K₂Ti₄O₉ for 2h and suspending in 1mol/L HCl followed by precipitation at pH=8 can reach 328.4m²·g^-1.

Key words: H₂Ti₄O₉, nanocrystal, ball-milling, ion exchange

CLC Number:

O614
TB383

WANG Jin-Shu,LI Hui,YIN Shu,SATO Tsugio. Preparation and Characterization of H₂Ti₄O₉ Nanocrystals[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2007.00843.

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Preparation and Characterization of H₂Ti₄O₉ Nanocrystals

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