Organic-inorganic hybrid mesoporous silicas: functionalization, pore size, and morphology control.
Topological design of mesoporous silica materials, pore architecture, pore size, and morphology are currently major issues in areas such as catalytic conversion of bulky molecules, adsorption, host-guest chemistry, etc. In this sense, we discuss the pore size-controlled mesostructure, framework functionalization, and morphology control of organic-inorganic hybrid mesoporous silicas by which we can improve the applicability of mesoporous materials. First, we explain that the sizes of hexagonal- and cubic-type pores in organic-inorganic hybrid mesoporous silicas are well controlled from 24.3 to 98.0 A by the direct micelle-control method using an organosilica precursor and surfactants with different alkyl chain lengths or triblock copolymers as templates and swelling agents incorporated in the formed micelles. Second, we describe that organic-inorganic hybrid mesoporous materials with various functional groups form various external morphologies such as rod, cauliflower, film, rope, spheroid, monolith, and fiber shapes. Third, we discuss that transition metals (Ti and Ru) and rare-earth ions (Eu(3+) and Tb(3+)) are used to modify organic-inorganic hybrid mesoporous silica materials. Such hybrid mesoporous silica materials are expected to be applied as excellent catalysts for organic reactions, photocatalysis, optical devices, etc.
Park
Sung Soo
SS
National Research Laboratory of Nano-Information Materials, Department of Polymer Science and Engineering, Pusan National University, Busan 609-735, Korea.
Ha
Chang-Sik
CS
D005453:Fluorescence; D008420:Manufactured Materials / Q000592:standards; D008674:Metals, Rare Earth / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D055096:Optical Devices; D017646:Organosilicon Compounds / Q000138:chemical synthesis* / Q000737:chemistry* / Q000592:standards; D011092:Polyethylene Glycols / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D016062:Porosity; D011409:Propylene Glycols / Q000737:chemistry; D012542:Scattering, Radiation; D012821:Silanes / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D013499:Surface Properties; D014961:X-Ray Diffraction; D014965:X-Rays
D008674:Metals, Rare Earth; D017646:Organosilicon Compounds; D011108:Polymers; D011409:Propylene Glycols; D012821:Silanes; C012504:polypropylene glycol; D011092:Polyethylene Glycols; D012822:Silicon Dioxide