Polymeric Micelle Assembly for Preparation of Large-Sized Mesoporous Metal Oxides with Various Compositions

Abstract

Here we report the synthesis of mesoporous metal oxide materials with various compositions by assembly of spherical polymeric micelles consisting of triblock copolymer poly(styrene-b-2-vinyl pyridine-b-ethylene oxide) (PS-b-PVP-b-PEO) with three chemically distinct units. The PVP block interacts strongly with the inorganic precursors for the target compositions. The hydrophobic PS block is kinetically frozen in the precursor solutions, enabling the spherical micelles to remain in a stable form. The frozen PS cores serve as templates for preparing robust mesoporous materials. The PEO corona helps the micelles to stay well dispersed in the precursor solutions, which plays a key role in the orderly arrangement of the micelles during solvent evaporation. This approach is based on assembly of the stable micelles using a simple, highly reproducible method and is widely applicable toward numerous compositions that are difficult for the formation of mesoporous structures.

Well-Organized Meso-Macroporous TiO2/SiO2Film Derived from Amphiphilic Rubbery Comb Copolymer

“…Furthermore, a triblock copolymer 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 4 composed of polystyrene-b-poly(vinyl pyridine)-b-poly(ethylene oxide) (PS-b-PVP-b-PEO) was employed to form meso-macroporous anatase TiO 2 film with a pore size of 40~50 nm and wall thickness of 10 to 40 nm. 12,13 The different tree blocks had different roles in sol-gel chemistry. In another study, a poly(ethylene-co-butylene)-b-poly(ethylene oxide) block polymer was used to form a three-dimensional cubic meso-macroporous structure.…”

Monolithic Gyroidal Mesoporous Mixed Titanium–Niobium Nitrides

“…22−28 This approach can generate ordered 3D continuous inorganic structures. 25 The sole report of a BCP-templated transition metal nitride from an oxide was titanium nitride that was neither a freestanding monolith nor a highly porous 3D continuous network structure.…”

Poly(p‐vinylbenzoic acid)‐block‐polystyrene Self‐assembled Structures as Templates in the Synthesis of ZIF‐8

“…[14,15] Af ew investigations have focused on the synthesiso fZ IF-8 by using polymer micelles as templates.B lock copolymerm icelles are very stable in solution and they are often used as templates forp reparation of porousm aterials. [16][17][18][19] For example, Cao et al synthesized as table 3D bicontinuous hierarchically porous ZIF-8 by using micelles of poly(styrene)-b-poly(4-vinylpyridine) and poly(styrene)-b-poly(acrylic acid) as templates. [20] Hollow ZIF-8 nanoworms using micelles of an amphiphilic block copolymera s template were reported by the group of Yu.…”