Abstract Facile, economic, template free and low-temperature hydrothermal synthesis of CeO2 nanoparticles was carried out in this research article. As-synthesized CeO2 nanoparticles were characterized through different techniques including FESEM, TEM, XRD, FTIR, UV–visible spectroscopy, Raman spectroscopy, and XPS analysis. XRD diffraction peaks confirmed the cubic fluorite structure for CeO2 nanoparticle. Highly agglomerated nanostructures with an average particle diameter of 15 ± 2 nm were observed from FESEM and TEM analyses. A single defined absorbance at 302 nm corresponding to the bandgap energy of 4.11 eV was recorded from the UV–visible spectrum. Vibrational and scattering properties as analyzed from FTIR and Raman spectra confirmed the formation of CeO2 nanoparticle. The CeO2 nanoparticles were immobilized on a glassy carbon electrode which showed excellent electrocatalytic activity in 0.1 M PBS with pH 7.4 for acetylacetone. The sensitivity, LOD and regression coefficient (R2) were respectively, 262 mA·mM−1 cm−1, 11.6 mM and 0.87339 for the fabricated chemical sensor. The study conducted herein confirms that CeO2 nanoparticles are promising candidates for electro-analytical sensing applications.

中文翻译：

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基于 CeO2 纳米粒子的高效化学传感器，用于检测乙酰丙酮化学物质

摘要 本研究实现了简便、经济、无模板、低温水热合成CeO2纳米颗粒。合成的 CeO2 纳米粒子通过不同的技术进行表征，包括 FESEM、TEM、XRD、FTIR、紫外-可见光谱、拉曼光谱和 XPS 分析。XRD 衍射峰证实了CeO2 纳米颗粒的立方萤石结构。从 FESEM 和 TEM 分析中观察到平均粒径为 15±2 nm 的高度聚集的纳米结构。从紫外-可见光谱记录了对应于 4.11 eV 带隙能量的 302 nm 处的单一定义吸光度。从 FTIR 和拉曼光谱分析的振动和散射特性证实了 CeO2 纳米颗粒的形成。CeO2 纳米颗粒固定在玻璃碳电极上，该电极在 0.1 M PBS 中对乙酰丙酮显示出优异的电催化活性，pH 为 7.4。制造的化学传感器的灵敏度、LOD 和回归系数 (R2) 分别为 262 mA·mM-1 cm-1、11.6 mM 和 0.87339。此处进行的研究证实，CeO2 纳米颗粒是电分析传感应用的有希望的候选者。