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IF 1.6 4区物理与天体物理 Q3 PHYSICS, CONDENSED MATTER

The European Physical Journal B Pub Date : 2024-12-14 DOI:10.1140/epjb/s10051-024-00842-w

T. Lohitha, R. Priya, Somarouthu V. G. V. A. Prasad, Archana Asatkar, N. S. M. P. Latha Devi, N. R. Rajagopalan, Nellore Manoj Kumar, Helen Merina Albert

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摘要

本研究采用化学沉淀法制备了二氧化铈（CeO2）或铈纳米棒。X 射线衍射 (XRD)、傅立叶变换红外光谱 (FTIR)、X 射线光电子能谱 (XPS)、扫描电子显微镜 (SEM)、紫外可见光 (UV-visible)、光致发光 (PL)、电化学阻抗能谱 (EIS)、热重分析和差热分析 (TG/DTA)被用来评估所制备样品的材料特性。XRD 结果显示，CeO2 纳米棒结晶成立方萤石晶系。评估了样品的微应变位错密度、增益尺寸和晶胞体积。XPS 检测用于验证 CeO2 纳米棒中组成元素的化学状态。傅立叶变换红外光谱分析用于研究 CeO2 纳米棒中的化学键和分子振动。扫描电镜分析用于观察 CeO2 纳米棒的晶粒结构。紫外可见光谱测定了 CeO2 的光吸收特性、带隙和厄巴赫能。利用 PL 研究和 CIE 色度图研究了 CeO2 纳米棒的发光特性。应用 EIS 方法研究了 CeO2 纳米棒的阻抗特性。还进行了 TGA/DTA 研究，以发现 CeO2 纳米棒的热特性。研究结果表明，CeO2 纳米棒可用作电极和光电材料。

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Investigating the spectroscopic, photoluminescence, electrochemical impedance, and thermal characteristics of cerium oxide (CeO2) nanorods

Cerium dioxide (CeO₂) or Ceria nanorods were produced in the current work, using the chemical precipitation approach. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), UV–visible, photoluminescence (PL), and electrochemical impedance spectroscopy (EIS), thermogravimetric and differential thermal analyses (TG/DTA) were used to assess the material characteristics of the produced samples. The XRD results reveal that the CeO₂ nanorods crystallized into the cubic fluorite crystal system. Micro-strain dislocation density, gain size and cell volume of the samples were assessed. XPS examination was performed to verify the chemical states of the constituent elements in CeO₂ nanorods. FTIR spectral analysis was used to investigate chemical bonds and molecular vibrations in CeO₂ nanorods. SEM analysis was used to observe the grain structure of CeO₂ nanorods. UV–visible spectroscopy determined the CeO₂ optical absorption characteristics, bandgap, and Urbach energy. PL study and CIE-chromaticity mapping were used to investigate the light-emitting characteristics of the CeO₂ nanorods. The EIS method was applied to examine the impedance nature of CeO₂ nanorods. TGA/DTA investigations were performed to find the thermal characteristics of CeO₂ nanorods. The study findings indicate the usefulness of CeO₂ nanorods as electrodes and optoelectronic materials.