A new synthetic approach to generate mesostructured phosphorus-free titania is reported. Mesostructured hexagonal and lamellar titania were prepared by using the cationic surfactant C 16 TMA + and soluble peroxytitanates in the presence of Na + and TMA +, respectively. Moreover, upon hydrothermal postsynthesis, the lamellar mesophase can be converted to the hexagonal mesophase in the presence of Na + in the liquid phase. In contrast, the lamellar structure is stable and improves under similar conditions when Na + is replaced by TMA + .
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D. Trong On (1999) studied this question.
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