Microwave-Assisted Solvothermal Synthesis of Spinel AV2O4 (M = Mg, Mn, Fe, and Co)

详细信息    查看全文

• 作者：Arturo Gutierrez ; Arumugam Manthiram
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：August 18, 2014
• 年：2014
• 卷：53
• 期：16
• 页码：8570-8576
• 全文大小：487K
• ISSN：1520-510X

文摘

Lower-valent vanadium oxide spinels AV₂O₄ (A = Mg, Mn, Fe, and Co) consisting of A²⁺ and V³⁺ ions have been synthesized by a low-temperature microwave-assisted solvothermal (MW-ST) synthesis process in a tetraethylene glycol (TEG) medium. The oxides are formed within a short reaction time of 30 min at 300 掳C. Subsequent postheat treatment of the oxides at elevated temperatures in inert or reducing atmospheres results in an instability of the spinel phase, especially CoV₂O₄ due to the ease of formation of metallic Co, demonstrating the advantage of the low-temperature MW-ST process in accessing these oxides. This MW-ST synthesis approach is attractive for synthesizing other lower-valent transition-metal oxides that are otherwise difficult to obtain by conventional synthesis methods and for subsequent study of their unique physical and chemical properties.