چكيده به لاتين
In this project, first polyoxoacid (POA) H3PMo12O40 contains H6PMo11FeO40 was synthesized then polyoxometalate (POM) Cs4H2PMo11FeO40.6H2O was prepared using this polyoxoacid. Synthesized compounds were characterized by Fourier transform infrared spectroscopy )FT-IR(, diffuse reflectance UV-vis spectroscopy )UV-Vis-DRS(, X-ray diffraction )XRD( and energy dispersive X-ray spectroscopy (EDS) techniques. Photocatalytic activity of the polyoxometalate for degradation of methylene blue (MB) in presence of visible light was studied. Polyoxometalates (POMs) absorb in UV range of light and results displayed there is not photocatalytic operation in presence of visible light for synthesized POM, on the other hand, the POM is an adsorbent so synthesized POM was employed for adsorption of MB to remove this pollutant from water environment.
Application of POMs in various functional architectures, devices or materials demands a processing step. Most progresses have considered the exchange of POM counterions in an electrostatically driven approach. Unmodified POMs are crystalline solids that are hard to process. For modifying them organic-inorganic POM hybrids were made.
For modifying and increasing performance of Cs4H2PMo11FeO40.6H2O, hybrid of the POM and meso-tetrakis (4-trimethylanilinium) porphyrin (TAPP), a chromophore with good absorption in visible range of light was prepared. With this chromophore, the hybrid was able to photodegrade MB in presence of visible light.
Keywords: Polyoxometalate; Porphyrin; Organic-inorganic POM hybrid; Adsorption; Photocatalyst.
