El-Masry Mai M, Abd ELwahab Ashraf M, Arman M M
Basic Science Dept, Higher Engineering Institute, Thebes Academy, Cairo, Egypt.
Materials Science Lab (1), Physics Department, Faculty of Science, Cairo University, Giza, Egypt.
J Fluoresc. 2025 Jan 30. doi: 10.1007/s10895-024-04096-8.
This study reports the synthesis, characterization, and optical properties of ZnO, ZnCeO, and ZnNdO nanoparticles and their interactions with lead acetate solutions. X-ray diffraction (XRD) confirmed that the nanoparticles were synthesized in a single-phase hexagonal structure, with crystallite sizes of 12.48 nm, 50.79 nm, and 39.00 nm, respectively. Doping ZnO with Ce and Nd ions significantly enhanced its paramagnetic properties, as evidenced by squareness ratios of 11.18 × 10, 41.60, and 20.25 for ZnO, ZnCeO, and ZnNdO, respectively. UV-Vis absorption spectra revealed a redshift in lead acetate upon interaction with ZnO, indicating the formation of new chemical species. Ce and Nd doping further modified the optical properties by introducing additional absorption peaks and altering spectral profiles. Significant enhancement in photoluminescence (PL) intensity is observed due to the addition of ZnO, ZnCeO, and ZnNdO nanoparticles, as compared to the pure PbCHO solution across various concentrations. The incorporation of ZnO nanoparticles increases the PL intensity by approximately tenfold (from 13 to over 100 a.u.). Similarly, ZnCeO exhibits a comparable level of enhancement. Notably, the introduction of ZnNdO nanoparticles achieves a remarkable 100-fold increase in PL intensity, establishing it as a highly effective material for detecting lead contamination in water. This exceptional performance highlights its potential for environmental monitoring and water quality applications. These results highlight the potential of ZnO, ZnCeO, and ZnNdO nanoparticles as sensitive and effective chemosensors for detecting trace lead levels in environmental samples.
本研究报告了ZnO、ZnCeO和ZnNdO纳米颗粒的合成、表征及光学性质，以及它们与醋酸铅溶液的相互作用。X射线衍射（XRD）证实，这些纳米颗粒是以单相六方结构合成的，微晶尺寸分别为12.48纳米、50.79纳米和39.00纳米。用Ce和Nd离子掺杂ZnO显著增强了其顺磁性能，ZnO、ZnCeO和ZnNdO的矩形比分别为11.18×10、41.60和20.25，证明了这一点。紫外可见吸收光谱显示，醋酸铅与ZnO相互作用后发生了红移，表明形成了新的化学物质。Ce和Nd掺杂通过引入额外的吸收峰和改变光谱轮廓进一步改变了光学性质。与不同浓度的纯PbCHO溶液相比，由于添加了ZnO、ZnCeO和ZnNdO纳米颗粒，光致发光（PL）强度显著增强。ZnO纳米颗粒的加入使PL强度增加了约十倍（从13增加到超过100任意单位）。同样，ZnCeO也表现出相当程度的增强。值得注意的是，ZnNdO纳米颗粒的引入使PL强度显著增加了100倍，使其成为检测水中铅污染的高效材料。这种卓越的性能突出了其在环境监测和水质应用中的潜力。这些结果突出了ZnO、ZnCeO和ZnNdO纳米颗粒作为检测环境样品中痕量铅水平的灵敏且有效的化学传感器的潜力。
