物理化学学报 >> 1986, Vol. 2 >> Issue (05): 470-472.doi: 10.3866/PKU.WHXB19860513

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ⅡB族元素氧化物与γ-Al2O3相互作用的XRD研究

刘英骏; 董保和; 谢有畅; 唐有祺   

  1. 北京大学 物理化学研究所
  • 收稿日期:1985-09-26 修回日期:1986-03-28 发布日期:1986-10-15

XRD INVESTIGATION OF THE INTERACTION BETWEEN GROUP——ⅡB OXIDES AND γ-Al2O3

Liu Yingjun; Dong Baohe; Xie Youchang; Tang Youqi   

  1. Institute of Physical Chemistry; Peking University
  • Received:1985-09-26 Revised:1986-03-28 Published:1986-10-15

Abstract: The interaction between γ-Al_2O_3 and the oxides of Zinc, Cadium and Mercury have been studied by x-ray diffraetion(XRD). Samples of ZnO/γ-Al_2O_3, CdO/γ-Al_2O_3 and HgO/γ-Al_2O_3 were prepared by impregnating γ-Al_2O_3 with the corresponding nitrate solutions, then drying and ealeinating. It has been shown that CdO and HgO can be dispersed on γ-Al_2O_3 surface to form submonolayers. Their dispersion capaeieies derived from Fig.2 and Fig.3 are 0.48g CdO/g γ-Al_2O_3 and 0.16g HgO/g γ-Al_2O_3, or 0.20g CdO/100m~2 and 0.067g HgO/100m~2 surface of γ-Al_2O_3 (specific surface of γ-Al_2O_3 is 240m~2/g). On the other hand, ZnO/γ-Al_2O_3 system can not be in a monolayer dispersion state, because ZnO can react with γ-Al_2O_3 to form Zinc spinel at rather low temperature (200 ℃). The difference between these three systems may be attributed to their different ion radius.