Wormhole-like mesoporous structure

Wang Y, Tang X, Lin L, Huang W, Haochen Y, Gedanken A (2000) Sonochemical synthesis of mesoporous titanium oxide with wormhole-like framework structures. Adv Mater 12 1183-1186... 

Y.Q. Wang, X.H. Tang, L.X. Yin, W.P. Huang, Y.R. Hacohen, and A. Gedanken, Sono-chemical Synthesis of Mesoporous Titanium Oxide with Wormhole-like Framework Structures. Adv. Mater, 2000, 12, 1183-1186. 

It was observed that the furfuryl alcohol/TEOS ratio significantly affected the mesopore size of resulting carbon. Moriguchi et al. reported the direct synthesis of mesoporous carbon material by in situ polymerisation of divinylbenzene in the hydrophobic phase of a hexagonally arrayed micelle/silicate nanocomposite and its subsequent carbonisation and HE treatment. The resulting carbon material had poor structural ordering with only wormhole-like mesopores of 2 nm. The synthesis of mesoporous carbon via one-step vapour deposition polymerisation using... 

Membranes synthesized on y- AI2O3 have various morphology (Figs. 1, 3a and 4). The typical results obtained are shown in Table 1 together with synthesis conditions. The materials obtained are amorphous, MFI type zeolite or MSU mesoporous materials with a disordered wormhole like structure, depending on the support pretreatment and synthesis conditions. 

Recently, a selective etching method has been developed as a simple and effective strategy to fabricate hollow mesoporous silica particles. Fang et al. reported the formation of hollow mesoporous sihca spheres with either a wormhole-like or an oriented pore structure by treatment of sohd silica spheres in a sodium... 

Subsequently, it was found that the surfactant in the synthesis system can modify the mesoporous textural properties but does not affect the self-formation of the meso-macroporous hierarchy. Zirconium oxides with the similar meso-macropo-rous structure could also be synthesized via the self-formation phenomenon in the absence of a surfactant [131]. The resulting hierarchically meso-macroporous zir-coniiun oxides are mainly tens of micrometers in size with a regular array of parallel or funnel-like macrochannek of 300-800 nm in diameter. The macropore walls are constmcted from mesochannels (around 2.0 nm) with a wormhole-like array. These materials obtained via this self-formation phenomenon present high surface area and pure crystalline phases in meso-macroporous structures. 

---