Stabilization of mesoporous nanocrystalline zirconia with Laponite
The mesoporous nanocrystalline zircoina was synthesized via solid state reaction--structure directing method in the presence of Laponite. The introduction of Laponite renders the higher thermal stability and lamellar track to the zirconia. Laponite acts as inhibitor for crystal growth and also hard template for the mesostructure. The role of Laponite is attributed to the interaction between the zirconia precursors and the nano-platelets of Laponite via the bridge of hydrophilic segments of surfactant. It results in the formation of Zr-O-Mg-O-Si frameworks in the direction of Laponite layer with the condensation of frameworks during the calcination process, which contributes the higher stability and lamellar structure to the nano-sized zirconia samples.
作 者： LIU Xinmei YAN Zifeng LU Gaoqing 作者单位： LIU Xinmei,YAN Zifeng(Key Laboratory for Heavy Oil Processing, Key Laboratory of Catalysis, CNPC, University of Petroleum, Dongying 257062, China;ARC Centre for Functional Nanomaterials, University of Queensland, QLD 4072 Australia)LU Gaoqing(ARC Centre for Functional Nanomaterials, University of Queensland, QLD 4072 Australia)
刊 名： 科学通报（英文版） SCI 英文刊名： CHINESE SCIENCE BULLETIN 年，卷(期)： 2005 50(4) 分类号： P5 关键词： mesoporous nanocrystalline zirconia Laponite stabilization mechanism