Precursor method¡ªA nonconventional route for the synthesis of ZnCr₂O₄ spinel

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• 作者：Dana Gingasu^a ; Ioana Mindru^a ; ^{imandru@yahoo.com} ; Luminita Patron^a ; Daniela C. Culita^a ; Jose Maria Calderon-Moreno^a ; Lucian Diamandescu^b ; Marcel Feder^b ; Ovidiu Oprea^c
• 关键词：A. Nanostructures ; B. Chemical synthesis ; C. Infrared spectroscopy ; C. X-ray diffraction
• 刊名：Journal of Physics and Chemistry of Solids
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：74
• 期：9
• 页码：1295-1302
• 全文大小：2419 K

文摘

Zinc chromites (ZnCr₂O₄) have been synthesized via thermal decomposition of (NH₄)₂[ZnCr₂(C₄O₆H₄)₄(OH)₂]?9H₂O and (NH₄)₃[ZnCr₂(C₆O₇H₁₁)₄(OH)₇]?H₂O precursors. The complex precursors have been characterized by infrared spectroscopy (IR), ultraviolet-visible spectroscopy (UV-vis), thermal analysis and scanning electron microscopy (SEM). ZnCr₂O₄ samples have been investigated and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet-visible (UV-vis) and photolumininescence (PL) spectroscopy and Brunauer-Emmett-Teller (BET) N₂ adsorption-desorption analyses. Nanoscaled (¡«60 nm) single-phase zinc chromites were obtained by heating the precursors at 900 ¡ãC for 1 h. The influence of thermal treatment of tartarate precursor on structural, morphological and textural properties of ZnCr₂O₄ is discussed.