Titanium dioxide-surfactant mesophases and Ti-TMS1


Putnam, R. L. ; Nakagawa, N. ; McGrath, K. M. ; Yao, N. ; Aksay, I. A. ; Gruner, S. M. ; Navrotsky, A. Titanium dioxide-surfactant mesophases and Ti-TMS1. Chemistry of Materials 1997, 9 2690-+.

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Several attempted syntheses of Ti-TMS1, a hexagonal mesoporous TiO2 reported by Antonelli and Ying, have resulted in a lamellar structure as determined by two-dimensional powder X-ray diffraction and transmission electron microscopy (TEM). Regions of partially calcined lamellar materials, when observed by TEM can be mistaken for hexagonal material. In no cases are specimens produced that were unambiguously hexagonal. It is concluded that the hexagonal material exists, if at all, only as a minor component of a larger lamellar structure when phosphate surfactants are used. Ti-TMS1 therefore remains elusive.

Last updated on 07/02/2018