Journal
JOURNAL OF POROUS MATERIALS
Volume 17, Issue 1, Pages 107-113Publisher
SPRINGER
DOI: 10.1007/s10934-009-9270-y
Keywords
Encapsulation; Zeolite-Y; ZSM-5; Hydrogen peroxide decomposition; Oxidation of phenol; Catechol and hydroquinone formation
Funding
- Bangalore Institute of Technology, Bangalore
- Department of Physics, I. I. Sc., Bangalore
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Cobalt(II), Copper(II) and Zinc (II) complexes of 2-methylbenzimidazole (Mebzlh) encapsulated in the super cages of zeolite-Y and ZSM-5 have been synthesized by flexible ligand method and characterized by various physico-chemical measurements. The catalytic activity of encapsulated complexes was investigated for the decomposition of H2O2 and for the hydroxylation of phenol using H2O2 as an oxidant. The hydroxylation of phenol yielded catechol and hydroquinone as the major products. All catalysts show good selectivity for diphenol products. The results showed that conversion of phenol varies in the order [Cu(Mebzlh)]-Y > [Cu(Mebzlh)]-ZSM-5 > [Zn(Mebzlh)]-Y > [Co(Mebzlh)]-Y > [Zn(Mebzlh)]-ZSM-5 > [Co(Mebzlh)]-ZSM-5 after 6 h of reaction time.
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