Lohitha T, Albert Helen Merina
Department of Physics, Sathyabama Institute of Science & Technology, Chennai, 600119, India.
J Fluoresc. 2025 Jun;35(6):4183-4196. doi: 10.1007/s10895-024-03831-5. Epub 2024 Jul 3.
Pedalium Murex leaf extract was used in this study to create Nickel-doped Cerium oxide (Ni-CeO) nanoparticles at 3 mol% and 5 mol% molar concentrations. The biosynthesized process was applied for the fabrication of Ni-CeO NPs. The X-ray diffraction method was used to identify their crystal structure. The XRD measurements showed that the Ni-CeO NPs crystallized into the face-centred cubic system. Fourier transform infrared spectral study was applied to explore the molecular vibrations and chemical bonding. The surface texture and chemical ingredients of Ni-CeO NPs were studied using field-emission scanning electron microscopy and energy-dispersive X-ray analysis. The EDX mapping spectra illustrate the uniform dispersal of Ce, Ni, and O atoms over the sample's surface. X-ray photoelectron spectroscopy (XPS) was conducted to confirm the chemical state of the Ni-CeO NPs. UV-Vis spectrum study was performed to ascertain the photon absorption, bandgap, and Urbach edge of Ni-CeO NPs. Photoluminescence (PL) research has been used to study the light-emitting characteristic of Ni-CeO NPs. The emissive intensity transition corresponding to Ni-CeO NPs was found to increase with the dopant level. The CIE 1931 chromaticity map was plotted to find the aptness of the samples for optical uses. The antifungal ability of Ni-CeO NPs was evaluated against the fungi candida albicans and candida krusein with the agar well-diffusion process. The fungicidal activity of the 3 mol% Ni doped CeO nanoparticles has shown a maximum zone of inhibition. The experimental findings illustrate the utility of Ni-CeO NPs for optical and antifungal applications.
本研究使用刺蒴麻叶提取物制备了摩尔浓度为3%和5%的镍掺杂氧化铈（Ni-CeO）纳米颗粒。采用生物合成法制备Ni-CeO纳米颗粒。利用X射线衍射法确定其晶体结构。XRD测量结果表明，Ni-CeO纳米颗粒结晶为面心立方体系。应用傅里叶变换红外光谱研究来探索分子振动和化学键。使用场发射扫描电子显微镜和能量色散X射线分析研究了Ni-CeO纳米颗粒的表面纹理和化学成分。EDX映射光谱表明Ce、Ni和O原子在样品表面均匀分散。进行X射线光电子能谱（XPS）以确认Ni-CeO纳米颗粒的化学状态。进行紫外-可见光谱研究以确定Ni-CeO纳米颗粒的光子吸收、带隙和乌尔巴赫边。光致发光（PL）研究用于研究Ni-CeO纳米颗粒的发光特性。发现与Ni-CeO纳米颗粒对应的发射强度跃迁随掺杂水平增加。绘制CIE 1931色度图以确定样品在光学用途方面的适用性。采用琼脂扩散法评估了Ni-CeO纳米颗粒对白色念珠菌和克柔念珠菌的抗真菌能力。3%摩尔浓度镍掺杂氧化铈纳米颗粒的杀菌活性显示出最大抑制圈。实验结果表明Ni-CeO纳米颗粒在光学和抗真菌应用方面具有实用性。
