高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (12): 1498.

• 论文 • 上一篇    下一篇

ZrO2/SO42-超强酸体系形成过程的研究

高滋, 陈建民, 唐颐   

  1. 复旦大学化学系, 上海, 200433
  • 收稿日期:1992-03-23 修回日期:1992-06-20 出版日期:1992-12-24 发布日期:1992-12-24
  • 通讯作者: 高滋

Studies on the Formation of ZrO2/SO42- Superacid System

Gao Zi, Chen Jian-min, Tang Yi   

  1. Department of Chemistry, Fudan University, Shanghai, 200433
  • Received:1992-03-23 Revised:1992-06-20 Online:1992-12-24 Published:1992-12-24

摘要: 本文用XRD、TG-DTG-DTA、SEM和化学分析等多种实验手段研究了浸渍H2SO4的无定形ZrO2在不同焙烧温度下的晶化和相变,失水和失硫等过程.实验结果表明,这些过程与超强酸的形成密切相关,在ZrO2/SO42-超强酸体系中不存在水和游离H2SO4,体系超强酸强度最高时ZrO2呈四方晶相,晶体表面约有略少于1/3的Zr原子与SO42-根相结合.

关键词: ZrO2/SO42-体系, 超强酸, 合成

Abstract: The crystallization,phase transition,dehydration and desulfuration of amorphous ZrO2 impregnated by H2SO4 under various calcination temperatures were studied with XRD,TG-DTG-DTA,SEMand chemical analysis methods.It was found that all these processes are evidently related with the formation of superacid.There are no water and free H2SO4 present in the ZrO2/SO42- superacid system,and the acid strength of the superacid system reaches the maximum as the amorphous ZrO2 transforms into a tetragonal crystal phase and slightly less than 1/3 of the surface Zr atoms are bonded with ZrO2/SO42- radicals.

Key words: ZrO2/SO42-system, Superacid, Synthesis

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