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Photoluminescence up-conversion and cathodoluminescence in quaternary CdxZnyOγSδ nanoparticles embedded on zeolite
Journal of Physics and Chemistry of Solids ( IF 4 ) Pub Date : 2021-02-23 , DOI: 10.1016/j.jpcs.2021.110004
Oscar E. Jaime-Acuña , Roberto E. San-Juan Farfán , Humberto Villavicencio , Manuel Herrera , Oscar Raymond Herrera

The optical, electronic, and vibrational properties of quaternary CdxZnyOγSδ (CdZnOS) semiconductor nanoparticles grown on mordenite-type zeolite (MOR) were studied using infrared, Raman, photoluminescence in emission and excitation modes, and cathodoluminescence spectroscopy. Semiconductor–mordenite (CdZnOS-MOR) composites were prepared utilizing low-cost and scalable methods: 1) Ion-exchange with as-synthesized sodium-mordenite and 2) a one-pot direct synthesis of zinc/cadmium-mordenite using a modified sol–gel technique, which were followed by sulfidation under a flow of H2S. The results of our vibrational studies have revealed the characteristic signals for the zinc-blende-type phase of the quaternary nanoparticles. From our photoluminescence analysis, the CdZnOS-MOR nanocomposites exhibits an up-conversion phenomenon, which is strongly related to the quantum confinement effect, while a high energy cathodoluminescence response established that the diversity of the transitions in this up-conversion process is associated to the wide distribution of size and stoichiometry of the nanoparticles. The luminescent, photoluminescent, and cathodoluminescent properties make the nanocomposite a promising photoactive material for application in photocatalysis.



中文翻译:

光致发光的上转换和阴极发光中的季镉Xý ö γ小号δ纳米颗粒嵌入沸石

季CD的光学,电子,和振动特性X的Zn ý ö γ小号δ使用红外,喇曼,光致发光中的发射和激发模式,和阴极发光光谱(CdZnOS)半导体生长在丝光沸石型沸石(MOR)的纳米颗粒进行了研究。半导体-丝光沸石(CdZnOS-MOR)复合材料的制备采用低成本和可扩展的方法:1)用合成的钠丝光沸石进行离子交换; 2)使用改性溶胶一锅法直接合成锌/镉-丝光沸石–gel技术,然后在H 2流下硫化S.我们的振动研究结果揭示了四级纳米粒子的锌共混物型相的特征信号。根据我们的光致发光分析,CdZnOS-MOR纳米复合材料表现出上转换现象,这与量子限制效应密切相关,而高能阴极发光反应则表明该上转换过程中跃迁的多样性与分子结构有关。纳米颗粒的尺寸和化学计量分布宽。发光,光致发光和阴极发光性质使纳米复合材料成为一种有前途的光敏材料,可用于光催化。

更新日期:2021-03-04
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