A novel reflux-hydrothermal synthesis of thermally stable lamellar crystalline zirconia via SDS template

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• 作者：Chao Liu^a ; ^b ; ^{liuchao_tj@yahoo.com} ; Shanshan Zhao^a ; Xiujie Ji^c ; ^{jxjchem@yahoo.com} ; Bin Wang^a ; Dongxia Ma^a
• 关键词：Lamellar structures ; Zirconia ; SDS ; Template synthesis
• 刊名：Materials Chemistry and Physics
• 出版年：2012
• 期刊代码：58_02540584
• 类别：ms
• 出版时间：16 April, 2012
• 卷：133
• 期：2-3
• 页码：579-583
• 文件大小：1206 K

摘要

Thermally stable lamellar crystalline zirconia (TSLCZ) was synthesized using sodium dodecyl sulphonate (SDS, C₁₂H₂₅SO₃Na) as supermolecular template via a novel 鈥榬eflux-hydrothermal鈥?hybrid method (R-HT). ZrOCl₂ and NaOH were used as Zr source and precipitant, respectively. The products were investigated by X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM) and Transmission Electron Microscopy (TEM). Results show that TSLCZ exhibits ordered lamellar structure, multilayers morphology and good hierarchical thermostabilities from crystal to nanostructure to microstructure at 500 掳C. This novel R-HT route ensures the controllable nucleation and growth of ZrO₂ to form TSLCZ. In contrast, reflux route leads to an unstable lamellar structure and non-crystalline inorganic phase, while hydrothermal route promotes the crystallization but cannot gain any ordered nanostructures. Moreover, neither reflux route nor hydrothermal route can obtain TSLCZ. The possible synthesis mechanism of TSLCZ via this novel R-HT route was proposed and discussed.