Chem. J. Chinese Universities ›› 2006, Vol. 27 ›› Issue (3): 538.

• Articles • Previous Articles     Next Articles

Synthesis,Characterization and Catalytic Behavior of V-Si-β Molecular Sieves

YU Ling1, HE Hong-Yun1*,HE Chi-Jian1,ZHU Hua-Yuan1,WEN Jian-Jun1, PANG Wen-Qin2   

  1. 1. College of Chemistry and Chemical Engineering,Hunan Normal University,Changsha 410081,China;
    2. State Key Laboratory of Inorganic Synthesis & Preparative Chemistry,Jilin University,Changchun 130012,China
  • Received:2005-03-09 Online:2006-03-10 Published:2006-03-10

Abstract:

V-β molecular sieves through isomorphous replacement of Si by V in zeolite β were successfully synthesized via hydrothermal procedure. The synthesis conditions were as follows: the molar chemical composition of the mixture: 60SiO2-xV2O5-y(TEA)2O-zH2O-wNH4F ( 1≤x≤6,y≥16,500≤z≤800,w≥5 ),reaction temperature 413 K,reaction time 12 d. The synthesized samples are characterized by XRD,IR,UV-Vis,TG,DTA and SEM. The results confirm that V-β molecular sieves contain a β phase of good species,and show the presence of V iron in the framework position. In the system the catalytic behavior of V-β molecular sieves in the hydroxylation of phenol with H2O2 as the oxidant was also investigated.

Key words: V-β molecular sieve; Catalytic behavior; Phenol; Hydroxylation

CLC Number: 

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