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The rapid growth in nanotechnology has driven the interest in studies on the structural properties of nanosized systems to expand their technological applications in catalystsCatalysts. Structural properties of binary CeZr and ZrMn nanocompositeNanocomposite oxide catalystsCatalysts were monitored towards the Laser Raman spectroscopyRaman spectroscopy investigations providing new insights to control catalytic applications upon temperature ranges at which the laser power was varied. The vibrational properties were investigated by varying the incident laser power during Raman measurements from 0.017 to 4.0 mW. Previous studies on the local laser heating effectsLaser heating effects on samples have demonstrated that nanomaterials stability deteriorated due to thermal effects. This work applies laser power heating to observe its effects on the vibrational properties of binary nanocompositeNanocomposite oxide catalystsCatalysts. Laser-induced local heating upon varying laser power values from 0.017 to 4.0 mW. Structural changes in nanocompositesNanocomposite were achieved upon increasing laser power, which induced local heating disorder causing the sintering of ZrMn nanocompositesNanocomposite. The oxygen vacancy defects over the CeZr catalystCatalysts were observed. ZrMn exhibited phase transitions from MnO2 to α-Mn2O3 being the use of this nanocompositeNanocomposite limited to work at 1.1 mW.

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Laser-Power Dependence Effects on the Structural Stability of CeZr and ZrMn Catalysts Oxides Studied by Raman Spectroscopy

  • 会议论文

  • 发表日期：

    2025年

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  • Antonio N. da Silva,
  • Marcos Davi L. Gonçalves,
  • Pierre B. N. Assis,
  • Alcineia C. Oliveira

摘要

The rapid growth in nanotechnology has driven the interest in studies on the structural properties of nanosized systems to expand their technological applications in catalystsCatalysts. Structural properties of binary CeZr and ZrMn nanocompositeNanocomposite oxide catalystsCatalysts were monitored towards the Laser Raman spectroscopyRaman spectroscopy investigations providing new insights to control catalytic applications upon temperature ranges at which the laser power was varied. The vibrational properties were investigated by varying the incident laser power during Raman measurements from 0.017 to 4.0 mW. Previous studies on the local laser heating effectsLaser heating effects on samples have demonstrated that nanomaterials stability deteriorated due to thermal effects. This work applies laser power heating to observe its effects on the vibrational properties of binary nanocompositeNanocomposite oxide catalystsCatalysts. Laser-induced local heating upon varying laser power values from 0.017 to 4.0 mW. Structural changes in nanocompositesNanocomposite were achieved upon increasing laser power, which induced local heating disorder causing the sintering of ZrMn nanocompositesNanocomposite. The oxygen vacancy defects over the CeZr catalystCatalysts were observed. ZrMn exhibited phase transitions from MnO2 to α-Mn2O3 being the use of this nanocompositeNanocomposite limited to work at 1.1 mW.