Sonochemical Synthesis and Properties of Nanoparticles of FeSbO4

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• 作者：Pratanu Nag ; Suparna Banerjee ; Yongmoon Lee ; Ali Bumajdad ; Yongjae Lee ; P. Sujatha Devi
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：January 16, 2012
• 年：2012
• 卷：51
• 期：2
• 页码：844-850
• 全文大小：456K
• 年卷期：v.51,no.2(January 16, 2012)
• ISSN：1520-510X

文摘

A sonochemical method was employed to prepare reactive nanoparticles of FeSbO₄ at 300 掳C, which is the lowest calcination temperature reported so far for preparing FeSbO₄. A systematic evolution of the FeSbO₄ phase formation as a function of temperature was monitored by in situ synchrotron X-ray measurements. The 300 and 450 掳C calcined powders exhibited specific surface areas of 116 and 75 m²/g, respectively. The X-ray photoelectron spectra analysis confirmed the presence of mainly Fe³⁺ and Sb⁵⁺ in the calcined powder. The response of the fabricated sensors (using both 300 and 450 掳C calcined powders) toward 1000 ppm and 1, 2, 4, and 8% hydrogen, respectively, has been monitored at various operating temperatures. The sensors fabricated using 300 掳C calcined powder exhibited a response of 76% toward 4% H₂ gas at an operating temperature of 300 掳C, while those fabricated using 450 掳C calcined powder exhibited a higher response of 91% with a quick recovery toward 4% H₂ gas at 300 掳C. The results confirmed that a higher calcination temperature was preferred to achieve better sensitivity and selectivity toward hydrogen in comparison to other reducing gases such as butane and methane. The experimental results confirmed that the sonochemical process can be easily used to prepare FeSbO₄ nanoparticles for various catalytic applications as demonstrated. Here, we project FeSbO₄ as a new class of material exhibiting high sensitivity toward a wide range of hydrogen gas. Such sensors that could detect high concentrations of hydrogen may find application in nuclear reactors where there will be a leakage of hydrogen.