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TiO2-Al2O3复合载体的比较研究
引用本文:罗胜成,桂琳琳,唐有祺. TiO2-Al2O3复合载体的比较研究[J]. 物理化学学报, 1996, 12(1): 7-11. DOI: 10.3866/PKU.WHXB19960103
作者姓名:罗胜成  桂琳琳  唐有祺
作者单位:Institute of Physical Chemistry,Peking University,Beijing 100871
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,XRS,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

关 键 词:TiO2-Al2O3  复合载体  混胶法  共沉淀法  
收稿时间:1995-03-05
修稿时间:1995-05-05

The Comparative Study on TiO_2-Al_2O_3 Composites
Luo Shengcheng, Gui Linlin, Tang Youqi. The Comparative Study on TiO_2-Al_2O_3 Composites[J]. Acta Physico-Chimica Sinica, 1996, 12(1): 7-11. DOI: 10.3866/PKU.WHXB19960103
Authors:Luo Shengcheng   Gui Linlin   Tang Youqi
Affiliation:Institute of Physical Chemistry,Peking University,Beijing 100871
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.
Keywords:TiO_2-Al_2O_3   Composite   Mixing gel   coprecipitation
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