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 Ti4O92- in the form of titania nanosheets have lateral size less than 50nm. The specific surface area of H2Ti4O9 nanocrystals depends on pH values of precipitation solution and ball milling time. The specific surface area of H2Ti4O9 nanocrystals prepared by ball-milling of K2Ti4O9 for 2 h and suspending in 1 mol/L HC1 followed by precipitation at pH=8 can reach 328.4 m2·g-1.
|Number of pages||4|
|Journal||Wuji Cailiao Xuebao/Journal of Inorganic Materials|
|Publication status||Published - 2007 Sep|
- Ion exchange
ASJC Scopus subject areas
- Materials Science(all)
- Inorganic Chemistry