计算物理 ›› 2009, Vol. 26 ›› Issue (4): 609-616.

• 研究论文 • 上一篇    下一篇

VB金属离子掺杂TiO2金红石构型与稳定性的分子动力学研究

潘海波, 张丽盆, 黄金陵   

  1. 福州大学功能材料研究所, 福建 福州 350002
  • 收稿日期:2008-01-28 修回日期:2008-09-15 出版日期:2009-07-25 发布日期:2009-07-25
  • 作者简介:潘海波(1962-),Male,Fujian, Fuzhou, Associated Professor, Research on computer simulation in physics and chemistry.
  • 基金资助:
    National Natural Science Foundation of China(20771026)

Configuration and Stability of TiO2-rutile Doped with VB Metal Ions: Molecular Dvnamics Simulation

PAN Haibo, ZHANG Lipen, HUANG Jinling   

  1. Institute for Research on the Functional Materials, Fuzhou University, Fuzhou 350002, China
  • Received:2008-01-28 Revised:2008-09-15 Online:2009-07-25 Published:2009-07-25
  • Supported by:
    National Natural Science Foundation of China(20771026)

摘要: 在300 K与101 325 Pa下,用分子动力学模拟研究0.5mol%,2.1mol%,3.8mol%VB金属离子(V5+,b5+,Ta5+)TiO2金红石构型与总能量.当掺杂离子浓度为2.1mol%时,离子位置具有较小的平方位移,及较明显的原子晶面与高的稳定性,金红石构型保持较好的完整性.其中,与V5+,Ta5+掺杂离子相比,Nb5+离子由于具有Ti5+相匹配的价态与离子半径,能够较好地溶入到TiO6八面体中.

关键词: 分子动力学模拟, 金红石相, 掺杂TiO2, 构型, 稳定性

Abstract: Molecular dynamics simulation is made to study configuration and total energy of 0.5 mol%,2.1mol%,3.8mol% VB transition metal ions (V5+,Nb5+,Ta5+)/TiO2 in rutile at 300K and 101 325 Pa.As 2.1mol% Ti4+ is substituted by dopants,configuration remains well with less mean-square displacements (MSDs),distinct planes of atoms and higher stability.Nb5+ incorporates into TiO6 octahedra well and shows a large solubility in TiO2 compared with V5+ or Ta5+ due to comparable valence and ionic radius between Nb5+ and Ti4+.

Key words: molecular dynamics simulation, rutile, doped TiO2, configuration, stability

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