Journal
CRYSTENGCOMM
Volume 17, Issue 37, Pages 7160-7168Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ce01375e
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Funding
- State Key Program of the National Natural Science Foundation of China [21236008, 21401017]
- China Postdoctoral Science Foundation [2014 M551094]
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In this work, MIL-53(Fe) was synthesized using a solvothermal method under static conditions. However, it was interesting to find that another MIL-53 type material, Fe(BDC)(DMF,F), was obtained when stirring conditions were used while keeping the other conditions fixed. The Fe-containing metal-organic frameworks (MOFs) were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fe-57 Mossbauer spectrometry and thermogravimetric analysis (TGA). By simply increasing the crystallization time under agitation, the morphology of the Fe(BDC)(DMF,F) crystals went through a striking transition from a bulky irregular shape to a rod-like morphology. The catalytic performance of the Fe-MOFs was evaluated in the degradation of phenol solution at near neutral pH at 35 degrees C. A significantly better catalytic activity was achieved for Fe(BDC)(DMF,F) than for MIL-53(Fe) and NH2-MIL-53(Fe) due to the existence of Fe(II) in its framework. Phenol was almost completely decomposed in 3 hours, and the conversions of hydrogen peroxide and chemical oxygen demand (COD) were 74.1% and 78.7%, respectively.
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