Abstract
Iron-substituted aluminophosphate molecular sieves (FeAPO-5) were synthesized by hydrothermal crystallization and characterized with XRD, SEM, FT-IR and UV-Vis techniques. The results showed that the synthesized samples had good crystallinity and uniform grain. From the obtained characterization results, it could be concluded that both the framework and extra-framework Fe species were together present in the FeAPO-5 samples, and most iron ion was incorporated into the AlPO4-5 framework. FeAPO-5 as a heterogeneous catalyst is effective for catalytic oxidation of phenol in aqueous solutions with H2O2 as oxidant. The best results (99.0% phenol conversion, 77.8% total organic carbon) after 240 min at 80°C were obtained with phenol initial concentration 200 mg·L-1, H2O2 initial concentration 1200 mg·L-1 and pH5.0. Meanwhile, inductively coupled plasma (ICP) spectrometry results indicated that the concentration of leaching-off Fe3+ in the solution was very little and the FeAPO-5 molecular sieves was stable in the process of catalytic oxidation of phenol in aqueous solutions.
Original language | English |
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Pages (from-to) | 348-353 |
Number of pages | 6 |
Journal | Huagong Xuebao/CIESC Journal |
Volume | 59 |
Issue number | 2 |
State | Published - Feb 2008 |
Keywords
- Catalytic oxidation
- FeAPO-5
- Molecular sieve
- Phenol