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Photocatalytic And Magnetic Behaviors Observed In Nanostructured Bifeo_3 Particles

机译:纳米结构的Bifeo_3粒子的光催化和磁行为

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摘要

Nanostructured BiFeO_3 particles have been synthesized by a hydrothermal method, and the effects of particle size on photocatalytic activity and magnetic property of BiFeO_3 were investigated. The optical absorption spectra indicate that the band-gap energy increases with decreasing crystalline size due to the quantum-size effect. The enhancement of room-temperature weak ferromagnetism can be observed in nanoscale BiFeO_3 particles, which should be attributed to the size-confinement effect on the magnetic ordering. In addition, BiFeO_3 nanoparticles with diameter about 5 nm show good photocatalytic performance by photodegradation of Congo red under visible-light (λ > 400 nm) irradiation.
机译:通过水热法合成了纳米结构的BiFeO_3颗粒,研究了粒径对BiFeO_3的光催化活性和磁性的影响。光学吸收光谱表明,由于量子尺寸效应,带隙能量随着晶体尺寸的减小而增加。可以在纳米级BiFeO_3颗粒中观察到室温弱铁磁性的增强,这应该归因于尺寸限制作用对磁有序性的影响。此外,直径约5 nm的BiFeO_3纳米粒子在可见光(λ> 400 nm)照射下通过刚果红的光降解表现出良好的光催化性能。

著录项

  • 来源
    《Journal of Applied Physics》 |2009年第5期|670-672|共3页
  • 作者单位

    State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Sciencernand Engineering, Tsinghua University, Beijing, 100084, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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