Hierarchically meso-macroporous

Zhang X. J., Hirota R., Kubota T., Yoneyama Y. and Tsubaki N. (2011). Preparation of hierarchically meso-macroporous hematite Fe Oj using PMMA as imprint template and its reaction performance for Fischer-Tropsch syntiiesis. Catalysis Communications, 13(1), 44 8. 

Yuan Z-Y, Su B-L (2006) Insights into hierarchically meso-macroporous structured materials. J Mater Chem 16 663-667... 

Yang, S.B., Wang, J., Tan, H.L., Zeng, F.Y., Liu, C.S., 2012c. Mechanically robust PEGDA-MSNs-OH nanocomposite hydrogel with hierarchical meso-macroporous structure for tissue engineering. Soft Matter 8, 8981—8989. 

It is found that hierarchically meso/macroporous metal oxides can be synthesized even without the use of any external macrotemplate. In fact, great efforts have been made by scientists to promote development of hierarchically porous materials via the spontaneous self-formation phenomenon from metal alkoxides during the past decade. In this section, we will review the history of self-formation phenomenon to target hierarchically porous materials based on metal alkoxides. 

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. 

Meso-Macroporous Mixed Oxides Multicomponent oxides play a central role in chemical and petrochemical processing as catalysts and as supports for catalytically active species [145]. It is known that the catalytic efficiency of metal oxides can be improved by doping them with a metal or combining them with another metal oxide [145]. The strategy based on the self-formation phenomenon to fabricate the porous hierarchy demonstrated its simplicity and superiority in the synthesis of hierarchically meso-macroporous metal oxides with multiple compositions. 

Hierarchical meso-/macroporous phosphatcd and phosphonated titania nanocomposite materials with high photocatalytic activity... 

Hierarchical meso-/macroporous phosphated and phosphonated materials... 

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