CJCU

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (3): 346.

• Articles • Previous Articles     Next Articles

Synthesis, Characterization and Acid-Base Properties of Layered Double Hydroxides Pillared with Tungstosilicate Anions

GUO Jun1, SUN Tie1, SHEN Jian-Ping1, LIU Dan1, DANG Da-Zhen1, MIN En-Ze2   

  1. 1. Department of Chemistry, Jilin University, Changchun 130023;
    2. Research Institute of Petroleum Processing, Beijing 100083
  • Received:1994-05-31 Revised:1994-10-08 Online:1995-03-24 Published:1995-03-24

PDF (PC)

Abstract: Layered double hydroxides(LDHs) pillared with heteropolyanions,SiW11M·(H2O)O396-(Mis the first row transition metals),were synthesized by means of direct ion-exchange reaction and were characterized by elementary analysis,XRD,IR and DTA.The results show that the interlayer space of the pillared products increase from 0.92 nm to 1.47 nm,and there is an increase in the thermal stability of the pillared product with the heteropolyanion intercalating into the LDH. The pillared prodticts shows the acid-base bifunctional catalysis over the isopropanol conversion,and the acidity is relatively stronger.

Key words: Tungstosilicate heteropolyanions, Pillared LDHs, Synthesis and characterization, Acid-base property

TrendMD: