物理化学学报 >> 1996, Vol. 12 >> Issue (01): 7-11.doi: 10.3866/PKU.WHXB19960103

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TiO2-Al2O3复合载体的比较研究

罗胜成,桂琳琳,唐有祺   

  1. 北京大学物理化学研究所，北京 100871
  • 收稿日期:1995-03-05 修回日期:1995-05-05 发布日期:1996-01-15
  • 通讯作者: 桂琳琳

The Comparative Study on TiO2-Al2O3 Composites

Luo Sheng-Cheng,Gui Lin-Lin,Tang You-Qi   

  1. Institute of Physical Chemistry,Peking University,Beijing 100871
  • Received:1995-03-05 Revised:1995-05-05 Published:1996-01-15
  • Contact: Gui Lin-Lin

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摘要：

对用混胶法和共沉淀法分别制备的TiO2－Al2O3复合载体（TiO2含量为0．08g／gγ－Al2O3）进行了对比研究，采用的表征方法有XRD，XPS，LRS等，得出的结论如下：两种载体均保持了γ－Al2O3的骨架结构，但TiO2的分散状态不尽相同．混胶样品中TiO2主要以表面富集的形式分散在γ－Al2O3表面，这有利于集二者的优点于一体；共沉淀样品中TiO2趋于整个体相均匀分散，这有利于相互作用后形成新的性能．

关键词: TiO2-Al2O3, 复合载体, 混胶法, 共沉淀法

Abstract:

TiO2-Al2O3 composites (TiO2 content is 0.08gTiO2/gAl2O3) were prepared by two methods: mixing gel and coprecipitation, and characterized by XRD, XPS, and LRS. The results show that γ-Al2O3 is the only species of crystal to be identified by XRD for both samples treated at 550℃ for 5 hours, but the forms of TiO2 are different. TiO2 is dispersed on the surface for the sample by mixing gel. As to the composite by coprecipitation, TiO2 is dispersed so well in the bulk that it is difficult to be detected by XRD or LRS.

Key words: TiO2-Al2O3, Composite, Mixing gel, coprecipitation