Synthesis of Crystalline/Amorphous Core/Shell MoO3 Composites through a Controlled Dehydration Route and Their Enhanced Ethanol Sensing Properties

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• 作者：Longqiang Wang ; Peng Gao ; Di Bao ; Ying Wang ; Yujin Chen ; Cheng Chang ; Guobao Li ; Piaoping Yang
• 刊名：Crystal Growth & Design
• 出版年：2014
• 出版时间：February 5, 2014
• 年：2014
• 卷：14
• 期：2
• 页码：569-575
• 全文大小：401K
• ISSN：1528-7505

文摘

Considering the specific surface area, flexible structures, high porosity, and a homogeneous and isotropic nature down to the atomic scale possessed by the amorphous nanostructure, an interesting controlled dehydration route has been developed to synthesize the crystalline/amorphous core/shell (C/A-C/S) MoO₃ nanocomposite, in which macroisopolyanion [Mo₃₆O₁₁₂(H₂O)₁₆]^{8鈥?/sup> ({Mo₃₆}) was successfully assembled into a one-dimensional connection and underwent a deficient crystallization induced by the prospective infiltrative dehydration process. The as-obtained MoO₃ samples鈥?affirmative composition and composite structure have been further demonstrated by the XRD, TEM, HRTEM, and Raman spectra measurements. As a result of this special C/A-C/S structure, the MoO₃ composite exhibited high selectivity and a higher sensor response, at a lower working temperature (180 掳C) to ethanol gas compared with other 1D MoO₃ micro/nanostructures reported previously.}