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Effect of calcination on morphology and optical properties of AlO-CeO nanocomposites

机译：煅烧对AlO-CeO纳米复合材料形貌和光学性能的影响

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In the present investigation, main emphasis has been given to synthesize AlO-CeO nanocomposites by a Sol-Gel method based on polymeric network of polyvinyl alcohol (PVA). The idea behind sol-gel synthesis is to “dissolve” the compound in a liquid in order to bring it back as a solid in a controlled manner. In this method mixture solvent of 50:50 ethanol-water was used to dissolve aluminium nitrate, cerium nitrate and PVA. The mixture was heated to 80° C to form homogeneous gel. The hard gel was calcined at a temperature of 600° C for 4 hour and 8 hour and finally converted into nanocomposites. The prepared nanocomposites have been characterized using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), UV-VIS. and Fourier Transformation Infrared Spectroscopy (FTIR). The size of nanocomposites heated at 600° C for 4 hour and 8 hour using Scherrer formula comes out to be 5.4 nm and 8 nm respectively. Infrared spectroscopy is also used to determine presence of various functional groups. SEM revealed the polycrystalline structure of the nanocomposite.
机译：在本研究中，主要重点是通过基于聚乙烯醇（PVA）的聚合物网络的Sol-Gel方法合成AlO-CeO纳米复合材料。溶胶-凝胶合成背后的想法是将化合物“溶解”在液体中，以便以可控的方式将其作为固体带回。在该方法中，使用50:50乙醇-水的混合溶剂溶解硝酸铝，硝酸铈和PVA。将该混合物加热至80℃以形成均匀的凝胶。将该硬凝胶在600℃的温度下煅烧4小时和8小时，最后转化为纳米复合材料。制备的纳米复合材料已使用X射线衍射（XRD），扫描电子显微镜（SEM），UV-VIS进行了表征。和傅立叶变换红外光谱（FTIR）。使用Scherrer公式在600℃下加热4小时和8小时的纳米复合材料的尺寸分别为5.4nm和8nm。红外光谱法还用于确定各种官能团的存在。 SEM显示了纳米复合材料的多晶结构。

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