Assembled Surface-Anisotropic Colloids as a Template for a Multistage Catalytic Membrane Reactor

作者：Song Jung Hun; Kretzschmar Ilona^*

来源：ACS Applied Materials & Interfaces, 2009, 1(8): 1747-1754.

DOI：10.1021/am900286k

• colloidal template
• porous materials
• fibers
• polystyrene
• multisectional
• reactive separation
• multistage
• catalyst
• titanium dioxide
• titanium
• physical vapor deposition
• Janus particle

A polymeric catalytic membrane reactor (CMR) is Fabricated using alternating assemblies of surface-anisotropic (sa-) and plain (p-) polystyrene (PS) colloids as a template. We report the preparation of TiO(2) sa-PS colloids by physical vapor deposition of titanium onto a colloidal monolayer in an oxygen-rich environment and employ the modified colloids as a means to deliver the TiO(2) catalyst to the CMR pores. sa-PS and p-PS colloids are assembled into alternating cylindrical sections inside a microcapillary followed by infiltration and curing of a liquid polymer precursor in the interstitial space of the assembly, Subsequent organic solvent treatment results in a cylindrical porous CMR with embedded TiO(2) caps. TiO(2) cap embedment, composition and surface morphology, surface pore structure, and cross-sectional integrity are analyzed using variable-pressure scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy.

• 出版日期2009-8