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15th International Conference on Environmental Chemistry and Engineering

Rome, Italy

Mehdi Rahimi Nasrabadi

Baqiyatallah University of Medical Sciences, Iran

Title: The facile synthesis of [email protected]@Ho2TiO5 core-shell nanostructures in mild circumstance and their photocatalytic activity analysis
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Biography: Mehdi Rahimi Nasrabadi


In this work, we have successfully fabricated Fe3O4@SiO2@Ho2TiO5 magnetic core-shell nanostructures with different weight percentages of holmium by sol-gel method. The achieved magnetic nanostructures characterized by several techniques such as X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy (DRS), vibrating sample magnetometer (VSM) and photoluminescence (PL) spectroscopy. The photocatalytic activity of the magnetic nanostructures was then evaluated by the degradation of methylene orange (MO). Additionally, the weight percentage of cerium oxides on magnetic photocatalyst was evaluated indicating that the photocatalyst including 10 wt% of holmium revealed the best photocatalytic activity and after a maximum of 40 min, about 99% of MO were eliminated from the water samples in the presence of Fe3O4@SiO2@Ho2TiO5 (10%wt Ho) nanostructure. Also, results shows the kinetics of the reaction in the presence of Fe3O4@SiO2@Ho2TiO5 (10%wt Ho) nanostructure to be pseudo first order. Furthermore, the photodegradation of MO was executed under visible light. The photodegradation of MO required hydrogen proxide (H2O2) as an external oxidant to accelerate photodegradation. In the case of applying 2.5cc of H2O2, 94% of the dye was degraded after 45 minutes.