Abstract Well crystalline CeO2 nanoparticles have been successfully synthesized via solution combustion synthesis (SCS) using (NH4)2[Ce(NO3)6] and C4H6O6 as oxidizer and fuel. The structural characteristics of as-synthesized material were investigated in terms of FESEM, HRTEM, EDS, XRD, FTIR and UV–Vis spectroscopy techniques. The surface area of synthesized CeO2 nanoscale material was obtained from BET plot. Results showed a pure, well-crystallized, flake-like mesoporous material to be formed with crystallite size of 18.86 nm. The focus of this study was to investigate the application of as-synthesized CeO2 nanomaterial for sensing and photocatalytic degradation of picric acid (PA) in its aqueous solution. It was found to be highly selective for PA detection in aqueous solution when compared with other aromatic compounds. Detection limit (0.52 µM) for PA when compared with earlier studies was found to be much better. In addition, 0.05 gm of as-synthesized CeO2 nanomaterial is found to be optimum amount ensuring maximum catalytic photodegradation of 10 ppm PA in aqueous solution. These experimental findings point out that as-synthesized CeO2 nanomaterial can be efficiently used as an effective chemical sensor and photocatalyst.

中文翻译：

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用于选择性传感和智能光催化应用的纳米结构 CeO 2

摘要 使用(NH4)2[Ce(NO3)6]和C4H6O6作为氧化剂和燃料，通过溶液燃烧合成(SCS)成功合成了结晶良好的CeO2纳米颗粒。根据FESEM、HRTEM、EDS、XRD、FTIR和UV-Vis光谱技术研究了合成材料的结构特征。合成的 CeO2 纳米级材料的表面积从 BET 图中获得。结果显示形成纯的、结晶良好的片状介孔材料，微晶尺寸为 18.86 nm。本研究的重点是研究合成的 CeO2 纳米材料在苦味酸 (PA) 水溶液中的传感和光催化降解中的应用。与其他芳香族化合物相比，发现它对水溶液中的 PA 检测具有高度选择性。检测限 (0. 52 µM) 的 PA 与早期的研究相比要好得多。此外，发现 0.05 gm 合成的 CeO2 纳米材料是确保水溶液中 10 ppm PA 的最大催化光降解的最佳量。这些实验结果表明，合成的 CeO2 纳米材料可以有效地用作有效的化学传感器和光催化剂。