Journal of Inorganic Materials

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Research on the Inorganic Composite Membrane Catalyst by the Sol-gel Process

SHENG Mei; ZHU Yi-Qing; WU Ze-Biao; LIN Xi-Ping; LI Hong-Dao   

  1. Department of Chemical Engineering; Jiangsu Institute of Petrochemical Technology; Changzhou 213016; China
  • Received:1999-01-04 Revised:1999-02-01 Published:1999-12-20 Online:1999-12-20

Abstract: Fe-Si-O and Mo-O sols were prepared by sol-gel process by using Si(OC2H5)4 (TEOS), Fe(NO3)3·9H2O and (NH4)6·Mo7O24·4H2O.
The Fe-Si-O membrane(on the microscope slide) and Mo-Fe-Si-O membrane (on the α-Al2O3 support) were obtained by diploid-circle-
dipping-coating. The effect of process conditions on the Fe-Si-O membrane and the influence of thermal treatment process on the Mo-Fe-Si-O membrane were studied
by DTA, XRD and SEM technique. The results indicated that the major factors affecting the Fe-Si-O membrane were sol viscosity, substrates,
dipping-coating time, withdrawal speed etc, and Mo-Fe-Si-O/α-Al2O3 membrane obtained by sol-gel method must be sintered at above 650℃
to form perfectly cubic phase structure. The membrane surfaces were crack-free after five times sintering at 700℃-cooling at 25℃
procedures.

Key words: sol-gel, Fe-Si-O sol, Mo-O sol, Mo-Fe-Si-O membrane

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