Enhancement of high entropy oxide (La0.2Nd0.2Sm0.2Gd0.2Y0.2)2Zr2O7 mechanical and photocatalytic properties via Eu doping
Source abstract
Abstract
High entropy oxides are novel materials with diverse compositions that have received significant interest for their mechanical and photocatalytic properties. In this study, we enhanced the mechanical and photocatalytic performance of solid state fabricated high entropy oxide (La0.2Nd0.2Sm0.2Gd0.2Y0.2)2Zr2O7 through Eu doping. Samples doped with different Eu ion concentrations demonstrated good thermal stability under high temperature without phase transformation after sintering at 1500 °C. We performed high pressure X-ray diffraction measurements and found that bulk modulus and critical pressure were improved by approximately 30 GPa and 5 GPa, respectively. This significant compression difference confirmed that Eu doping enhanced structural stability under high pressure. (La0.2Nd0.2Sm0.2Gd0.2Y0.2)1.98Eu0.02Zr2O7 demonstrated the best photocatalytic performance, with a kinetic constant about 1.5 times that of undoped samples. The appropriate doping concentration, smaller grain size and wider light absorption range contribute to the better photocatalytic performance irradiated under UV light. This work provides valuable insights for the design and improvement of high entropy oxide mechanical and photocatalytic performance.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · High Entropy Alloys Studies · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (49)
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