Photoluminescence up-conversion and cathodoluminescence in quaternary CdxZnyOγSδ nanoparticles embedded on zeolite
| Autor: | Manuel Paulino Linares Herrera, Humberto Villavicencio, Roberto E. San-Juan Farfán, Oscar Raymond Herrera, Oscar E. Jaime-Acuña |
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| Rok vydání: | 2021 |
| Předmět: |
Potential well
Materials science Photoluminescence Nanocomposite Nanoparticle Cathodoluminescence 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences symbols.namesake Chemical engineering symbols Photocatalysis General Materials Science 0210 nano-technology Raman spectroscopy Luminescence |
| Zdroj: | Journal of Physics and Chemistry of Solids. 153:110004 |
| ISSN: | 0022-3697 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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