Fabrication of Iron Based Metal-Organic Frameworks: MIL53 (Fe) for Organic Compounds Sensing

Organic molecules such as dyes and pigments have important role in environmental pollution. This issue could be addressed by sensing and degradation these molecules. Recognition and sensing of organic molecules are one of the most important things which are needs in different fields. There are so many materials which have been used for detecting but among them Metal-Organic Frameworks (MOFs) not only because of their porosity, but also due to pore surface functionalization, are increasingly attractive option. These coordination polymers due to conjugated system in their structure which can cause photo- excitation and production of electron-hole pair, good optical emission, stability and large specific surface area have been paid attention as optoelectronics devices, batteries for energy storage, bio imaging devices, photo catalyst, drug deliver and gas absorbent until past years. As mentioned above, one of applications of MOFs is sensing. Various MOFs which have aromatic groups in their structure have been reported as sensor due to their ability to show luminescence property under UV or visible light. In this study among reported MOFs for sensing approach, MIL53 (Fe) was used. Two MIL-53(Fe) were fabricated via conventional route at two different temperatures (120ºc and 150ºc) and then structure and morphology of these samples were investigated in details. To understand the structural differences between these two powders, XRD (X-ray diffraction) was used. As we can see from XRD pattern, both particles have synthesized with high crystallinity. Moreover, for morphological investigation SEM (Scanning Electron Microscopy) analysis was utilized. SEM images show that the homogenous crystals of MIL-53(Fe) were synthesized at two different temperatures but crystals have two different morphologies. According to SEM images, sample A have spherical crystal shape while the shape of samples B crystals are hexagonal and Considering to previous literatures this morphological difference can be effective in particles application as sensor.

کلیدواژه ها:

Environmental issues ، Organic molecules ، Sensor ، Metal-Organic Frameworks (MOF) ، MIL53(Fe)