Crystalline Framework Material Containing Arrays of Vanadium Oxide Nanoclusters: A Polyoxovanadate Framework with Room Temperature NOx Sensing Properties

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• 作者：M. Ishaque Khan ; Naga Ravikanth Putrevu ; Samar Ayesh ; Elizabeth H. Yohannes ; Brant Cage ; Robert J. Doedens
• 刊名：Crystal Growth & Design
• 出版年：2013
• 出版时间：November 6, 2013
• 年：2013
• 卷：13
• 期：11
• 页码：4667-4672
• 全文大小：308K
• 年卷期：v.13,no.11(November 6, 2013)
• ISSN：1528-7505

文摘

Transition metal oxide clusters provide attractive building blocks for synthesizing new materials with interesting structural, electronic, and magnetic properties. An interesting framework structure material [Cd^II₃(H₂O)₁₂V^IV₁₆V^V₂O₃₆(OH)₆(AO₄)]路24H₂O (A = V, S), 1, composed of three-dimensional arrays of vanadium oxide nanoclusters {V₁₈O₄₂(AO₄)} interconnected by {-O鈥揅d鈥揙-} bridging groups, has been prepared and characterized. Compound 1, whose structure is resolved at the atomic level by single crystal X-ray structure analysis, exhibits properties suitable for gas sensing applications. Sensor devices fabricated from 1 show promising sensing properties for detecting environmentally detrimental {NO_x} (NO and NO₂) gases with good sensitivity and reversibility. This is a rare example of a polyoxometalate-based material showing room temperature NO_x sensing properties.