Cerium aluminate, CeAlO₃, was prepared in the presence of copper in a single-step combustion synthesis without the need for post-synthesis calcination. The prepared material was investigated using x-ray diffraction followed by whole powder pattern decomposition, scanning electron microscopy, energy-dispersive x-ray spectroscopy, Fourier-transformed infrared spectroscopy, UV–Vis spectroscopy, x-ray photoelectron spectroscopy and thermogravimetric analysis. It was established that if the amount of copper was at least 1 mol.%, the combustion process was enhanced enough to result in the appearance of CeAlO₃ as the dominant phase. If the amount of copper was less than 1 mol.%, CeO₂ forms instead of CeAlO₃. The share of CeAlO₃ increases with the amount of copper, but this effect becomes negligible at 3 mol.%. Samples with CeO₂ as the main phase display a sponge-like morphology, while samples with CeAlO₃ as the main phase are dendritic. CeAlO₃ decomposes to CeO₂ and γ-Al₂O₃ between 600 and 800 °C yielding sample mass gain due to binding of additional oxygen in course of Ce³⁺-to-Ce⁴⁺ oxidation.

Graphical Abstract

中文翻译：

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铜存在下一步燃烧合成铝酸铈

铝酸铈（CeAlO ₃）是在铜存在下通过单步燃烧合成制备的，无需合成后煅烧。使用X射线衍射、全粉末模式分解、扫描电子显微镜、能量色散X射线光谱、傅里叶变换红外光谱、紫外-可见光谱、X射线光电子能谱和热重分析对制备的材料进行了研究。已确定，如果铜的量至少为1mol.%，则燃烧过程充分增强，导致CeAlO ₃作为主要相的出现。如果铜的量小于1mol.%，则形成CeO ₂而不是CeAlO ₃。 CeAlO ₃的比例随着铜含量的增加而增加，但这种影响在3 mol.%时变得可以忽略不计。以CeO ₂为主相的样品呈海绵状形貌，而以CeAlO ₃为主相的样品呈树枝状。 CeAlO ₃在 600 至 800 °C 之间分解为 CeO ₂和 γ-Al ₂ O _{3 ，由于在 Ce} ³⁺至 Ce ⁴⁺氧化过程中结合了额外的氧，从而产生样品质量增加。

图形概要