Structural and morphological transformations of mesostructured titanium phosphate through hydrothermal treatment.
The phase transformation of mesostructured titanium phosphate (TiPO) from hexagonal to lamellar structure was observed in a simply hydrothermal treatment, accompanied by drastically morphological changes in the micrometer-sized particles. XRD pattern revealed that different mesostructures were obtained by simply varying hydrothermal temperature or treatment duration. SEM and TEM observations showed the morphological evolution from individual particles to interconnected nanoplatelets. A significant blue shift in UV-vis spectra was observed for lamellar mesostructured material, which may be associated with the different coordinated Ti-sites in the hexagonal and lamellar mesostructures. FT-IR spectra and detailed (31)P MAS NMR studies indicated that additional POH groups were presented in the lamellar structure, which might play a key role in the structural and morphological transformations of mesostructures.
Wang
Lianzhou
L
ARC Centre of Excellence for Functional Nanomaterials, University of Queensland, St Lucia, Brisbane, QLD 4072, Australia.
Yan
Zhimin
Z
Qiao
Shizhang
S
Max Lu
G Q
GQ
Huang
Yining
Y