Deposition of iron titanate/titania ceramic composite thin films from a single molecular precursor
Deposition of iron titanate/titania ceramic composite thin films from a single molecular precursor
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DOI：
10.1016/j.ica.2011.06.019
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发表时间：
2011-10
影响因子：
2.8
通讯作者：
M. Ehsan;A. Tahir;M. Hamid;M. Mazhar;K. Wijayantha;M. Zeller
中科院分区：
文献类型：
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作者：
M. Ehsan;A. Tahir;M. Hamid;M. Mazhar;K. Wijayantha;M. Zeller
在三氟乙酸存在下，通过[Fe3O(OAc)6(H2O)3]NO3·4H2O与四(2-乙氧基乙醇酸)钛(IV)的简单反应，合成了[Fe2Ti4(μ-O)6(TFA)8(THf)6](1)[TFA=三氟乙酸乙酯，THf=四氢呋喃]。用熔点、CHN分析、FTIR、单晶X-射线衍射和热重分析对合成的前驱体进行了分析。配合物(1)属于晶胞尺寸为a=19.2114(14)，b=20.4804(15)和c=17.2504(12)的正交晶系空间群Pca21，在490℃下进行热分解，得到相当于Fe2TiO5-TiO2混合物的残留量。利用所合成的前驱体，以Ar为载气，采用气溶胶辅助化学气相沉积(AACVD)方法，在500℃的玻璃衬底上制备了Fe2TiO5-TiO2复合薄膜。扫描电子显微镜、能量色散X射线和X射线粉末衍射分析表明，薄膜形成了质量良好的Fe2TiO5-TiO2复合晶态薄膜，平均晶粒度为0.105-0.120μm。
A heterobimetallic single molecular precursor, [Fe2Ti4(μ-O)6(TFA)8(THF)6] (1) [TFA=trifluoroacetate, THF=tetrahydrofuran], was synthesized by the simple reaction of [Fe3O(OAc)6(H2O)3]NO3·4H2O [OAc=acetato] with tetrakis(2-ethoxyethanalato)titanium(IV) in the presence of trifluoroacetic acid in THF. The synthesized precursor was analyzed by melting point, CHN analysis, FTIR, single crystal X-ray diffraction and thermogravimetric analysis. Complex (1) crystallizes in the orthorhombic space group Pca21with cell dimensions a=19.2114(14), b=20.4804(15) and c=17.2504(12)Å, and the complex undergoes thermal decomposition at 490°C to give a residual mass corresponding to an Fe2TiO5–TiO2composite mixture. The synthesized precursor was utilized for deposition of Fe2TiO5–TiO2composite thin films by aerosol-assisted chemical vapor deposition (AACVD) on glass substrates at 500°C using argon as the carrier gas. Scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and X-ray powder diffraction (XRD) analyses of the thin films suggest the formation of good quality crystalline thin films of an Fe2TiO5–TiO2composite with an average grain size of 0.105–0.120μm.