A simple novel procedure for the synthesis of mesoporous titania whiskers from potassium dititanate (K2Ti2O5) was reported. Nanostructure whisker was obtained via controlling mesostructure transition process of the unstable trigonal bipyramidal layered crystal structure of K2Ti2O5 in a hydration step. XRD, TEM and HREM results confirm the existence of nanophase KOH·nH2O inside the inorganic framework. Removing of nanophase KOH·nH2O by acid solution leads to the formation of mesoporous structure with the specific surface area up to 248m2/g. The mesoporous structure of TiO2 whiskers and fibrous morphology can be preserved by calcination at 500℃ with the specific surface area of 139m2/g and the pore diameter of 8.7nm.
HE Ming
,
XU Li
,
GU Xiao-Li
,
LUO Zhen-Yang
,
LU Xiao-Hua
. Preparation and Mechanism Study of Mesoporous Titania Whiskers[J]. Journal of Inorganic Materials, 2008
, 23(6)
: 1236
-1240
.
DOI: 10.3724/SP.J.1077.2008.01236
[1] Crepaldi E L, Soler-Illia G, Grosso D, et al. J. Am. Chem. Soc., 2003, 125 (32): 9770-9786.
[2] David M A, Jackie Y Y, Angew. Chem. Int. Ed. Engl., 1995, 34 (18): 2014-2017.
[3] Yang P D, Zhao D Y, Margolese D I, et al. Nature, 1998, 396 (6707): 152-155.
[4] Wang Y Q, Tang X H, Yin L X, et al. Adv. Mater., 2000, 12 (16): 1183-1186
[5] Wallenberg L R, Sanati M, Andersson A. Microsc. Microanal. Microstruct., 1990, 1 (5-6): 357-364.
[6] Anderson S, Wadsley A D. Nature, 1960, 187 (4736): 499-500.
[7] Fujiki Y, Ohsaka T, Yogyo Kyokai-Shi. Ceramics, 1982, 90 (1046): 19-23.
[8] Kudo A, Kaneko E. Chem. Commun., 1997, (4): 349-350.
[9] Bamberger C E, Begun G M, MacDougall C S. Appl. Spectrosc., 1990, 44 (1): 30-37.
[10] Zhu H Y, Gao X P, Lan Y, et al. J. Am. Chem. Soc., 2004, 126 (27): 8380-8381.
[11] Feist T P, Davies P K. J. Solid. State Chem., 1992, 101 (2): 275-295.
[12] Putnis A. Mineral. Mag., 2002, 66 (5): 689-708.