掺杂Tm3+和Yb3+离子的氧化锶钆的微观结构、化学和光催化性能

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-04-07 DOI:10.1016/j.optmat.2025.117030

Tijana Stamenković, Vesna Lojpur

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引用次数: 0

摘要

本文首次报道了掺杂Tm3+和Yb3+离子的SrGd2O4纳米颗粒光催化降解。采用溶胶-凝胶辅助燃烧法制备样品，浓度分别为1 % Tm3+和4 % Yb3+。x射线衍射（XRD）研究表明，所有衍射峰都分配给纯正交相。透射电镜（TEM）和扫描电镜（SEM）观察到多孔的圆形颗粒呈网状排列。能量色散x射线光谱（EDS）证实了所有结构元素的存在，以及它们在粒子中的均匀分布。UV-VIS漫反射光谱（UV-VIS DRS）可以确定带隙，计算出带隙为4.3 eV。x射线光电子能谱（XPS）显示材料表面存在OH -基团。通过对亚甲基蓝的降解，观察了其光催化性能。结果表明，在模拟太阳照射4 h后，约50%的染料初始浓度矿化。

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Microstructural, chemical and photocatalytic properties of strontium gadolinium oxide doped with Tm3+ and Yb3+ ions

This is the first report of photocatalytic degradation employing SrGd₂O₄ nanoparticles doped with Tm³⁺ and Yb³⁺ ions. The sample was prepared via the sol-gel assisted combustion method using concentrations of 1 at% Tm³⁺ and 4 at% Yb³⁺. An X-ray Diffraction (XRD) investigation showed that all diffraction peaks are allocated to a pure orthorhombic phase. Transmission and Scanning Electron Microscopy (TEM, SEM) revealed the existence of porous agglomerated round-shaped particles, arranged in network-like structures. Energy Dispersive X-ray Spectroscopy (EDS) verified the presence of all structural elements, as well as their uniform distribution across the particles. UV-VIS Diffuse Reflectance Spectroscopy (UV-VIS DRS) enabled determination of the band gap, which was calculated to be 4.3 eV. X-ray Photoelectron Spectroscopy (XPS) revealed the presence of OH⁻ groups on the material surface. Photocatalytic properties were observed through the degradation of Methylene Blue. The results indicated that after 4 h of exposure to the simulating sun irradiation, about 50 % of the initial dye concentration was mineralized.

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.