Novel hierarchically structured macroscopic silica spheres have been synthesized using a biphasic oil-in-water system. The spheres are prepared in a one-step process by injection of the precursor solution into water. This leads to controlled hydrolysis and condensation of the silanes. The precursor solution contained three different silanes, a block copolymer acting as surfactant and a solvent. The spheres have a hierarchically layered morphology, high mechanical stability, specific surface areas up to 700 m(2)/g with mesopores in the range of 9-27 nm. The synthesis of such materials with a simultaneous control of the macroscopic and microscopic structure allows facile implementation in separation and catalysis. (C) 2011 Elsevier Inc. All rights reserved.     «

Novel hierarchically structured macroscopic silica spheres have been synthesized using a biphasic oil-in-water system. The spheres are prepared in a one-step process by injection of the precursor solution into water. This leads to controlled hydrolysis and condensation of the silanes. The precursor solution contained three different silanes, a block copolymer acting as surfactant and a solvent. The spheres have a hierarchically layered morphology, high mechanical stability, specific surface area...     »

ISI Document Delivery No.: 831ZK Times Cited: 1 Cited Reference Count: 25 Scholz, Sabine Bare, Simon R. Kelly, Shelly D. Lercher, Johannes A. Wacker Chemie AG; US DOE [DE-AC02-06CH11357] Financial support by Wacker Chemie AG and fruitful discussions within the Wacker-Institut fur Siliciumchemie and the framework of the network of excellence IDECAT are gratefully acknowledged. Use of the Advanced Photon Source, an Office of Science User Facility operated for the US Department of Energy (DOE) Office of Science by Argonne National Laboratory, was supported by the US DOE under Contract No. DE-AC02-06CH11357. The authors also thank Dipl.-Ing. Martin Neukamm for SEM analysis, Dipl.-Ing. Xaver Hecht for BET analysis and Hg-porosimetry, Francesco DeCarlo from the Argonne National Laboratory, Dipl.-Ing. Oliver Gobin and Dr. Yongzhong Zhu for many helpful discussions and for recording the highly resolved photographs as well as Georgeta Krutsch and Aleksandra Jonovic for TGA measurements. 1 Elsevier science bv Amsterdam     «

ISI Document Delivery No.: 831ZK Times Cited: 1 Cited Reference Count: 25 Scholz, Sabine Bare, Simon R. Kelly, Shelly D. Lercher, Johannes A. Wacker Chemie AG; US DOE [DE-AC02-06CH11357] Financial support by Wacker Chemie AG and fruitful discussions within the Wacker-Institut fur Siliciumchemie and the framework of the network of excellence IDECAT are gratefully acknowledged. Use of the Advanced Photon Source, an Office of Science User Facility operated for the US Department of Energy (DOE) Off...     »