Michalis K. Arfanis is a physicist and a Nanotechnology Processes for Solar Energy Conversion and Environmental Protection, holding an MSc in Materials Science and Technology. His research during his PhD studies (defended in 2018) focused on the synthesis and the characterization of TiO2 photocatalytic nanomaterials of nanotube, inverse opal and core-cell structures, and their evaluation against target contaminants in water.  Until now, he has been working on alternative nanostructured metal oxide photocatalysts, such as ferrites, vanadate, or tungsten oxides, and he is examining their photodegradation ability against contaminants of emerging concern, such as pesticides and pharmaceuticals. In parallel, he is involved in the design and construction of an innovative hybrid photocatalytic membrane reactor, able to recycle up to 15 m3 per day. He is also significantly experienced in SEM, AFM microscopy, Raman, UV/vis, and EDX spectroscopy, XRD techniques, and contact angle measurements. His interests in materials science have had a great impact on the study of inorganic/inorganic perovskites and zeolites' structural properties with Raman vibrational spectroscopy.