Iron phthalocyanine supported on silica or encapsulated inside zeolite Y as solid photocatalysts for the degradation of phenols and sulfur heterocycles

Mercedes Alvaro, Esther Carbonell Llopis, Mercedes Esplá, Hermenegildo Garcia

Research output: Contribution to journalArticlepeer-review

Abstract

The photocatalytic activity of iron phthalocyanine adsorbed on silica (FePc/SiO2) or encapsulated within NaY zeolite (FePc@NaY) towards the degradation of two model compounds using hydrogen peroxide as oxidant has been determined. It was found that while FePc/SiO2 exhibits higher intrinsic activity than FePc@NaY for the degradation of phenol in water, FePc/SiO2 cannot be used as heterogeneous photocatalyst in organic solvents due to self-degradation and/or desorption of the iron phthalocyanine from the silica surface to the solution. Thus, for the oxidative photodegradation of benzothiophene in acetonitrile using FePc/SiO2 as photocatalyst (a model reaction with importance in the fuel industry), the silica becomes colorless and without possibility of reuse. In contrast, FePc@NaY, in where iron phthalocyanine is permanently immobilized inside the zeolite pores, can be recovered by filtration after the photodegradation of benzothiophene in acetonitrile and reused.

Original languageEnglish
Pages (from-to)37-42
Number of pages6
JournalApplied Catalysis B: Environmental
Volume57
Issue number1
DOIs
Publication statusPublished - 15 Apr 2005
Externally publishedYes

Keywords

  • Degradation of benzothiophene
  • Iron phthalocyanine
  • Ship-in-a-bottle synthesis
  • Zeolite encapsulated photocatalyst

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