无机材料学报

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M(M= Mg, Ca, Sr, Ba, Ni)Nb2O6的光催化性能的研究

安惠中, 王 聪, 王天民, 郝维昌
  

  1. (北京航空航天大学凝聚态物理与材料物理研究中心, 北京 100083)
  • 收稿日期:2006-09-18 修回日期:2006-11-22 出版日期:2007-09-20 网络出版日期:2007-09-20

Photocatalytic Activity of M(M=Mg, Ca, Sr, Ba, Ni)Nb2O6

AN Hui-Zhong, WANG Cong, WANG Tian-Min, HAO Wei-Chang   

  1. (Center of Condensed Matter and Materials Physics, School of Science, Beihang University, Beijing 100083, China)
  • Received:2006-09-18 Revised:2006-11-22 Published:2007-09-20 Online:2007-09-20

摘要: 应用固相烧结法制备了半导体光催化材料MgNb2O6, CaNb2O6, SrNb2O6, BaNb2O6, NiNb2O6粉体. 利用XRD、UV-Vis漫反射谱、扫描电镜对上述粉体晶体结构、光谱性质和形貌进行了分析. 在紫外光下对其降解罗丹明B(RhB)的光催化性能进行了评估. 结果表明, 碱土金属Sr、Ba对NiNb2O6中Ni的取代能很好地提高铌酸盐的光催化效果, 在10h紫外光照射下能分别将RhB的浓度降解到原来的21%和37%.

关键词: 铌酸盐, 光催化, 降解罗丹明B, 碱土金属

Abstract: Powder samples, NiNb2O6, MgNb2O6, CaNb2O6, SrNb2O6, BaNb2O6, were prepared by solid state reaction. Crystal structure, optical and powder morphology of the samples were analyzed by XRD, UV-Vis diffuse reflectance spectra and SEM. The photocatalytic properties were investigated by degrading rhodamine B under UV irradiation. The substitution of alkaline-earth metals for Ni improves the photocatalytic activity of MNb2O6. After UV irradiation for 10h, the concentrations of RhB/SrNb2O6 suspension and RhB/BaNb2O6 suspension are degraded to 21% and 37%, respectively.

Key words: niobate, photocatalysis, rhodamine B degradation, alkaline-earth metals

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