Francesco Parrino is an Assistant Professor of Chemistry at the University of Trento, Italy. He graduated cum laude in Chemical Engineering from the University of Palermo in 2005 and got a PhD in Inorganic Chemistry from the Friedrich-Alexander University of Erlangen–Nürnberg, Germany, in 2009. His research activity deals with the preparation and characterization of photocatalysts for degradation of pollutants and for green synthesis of organic molecules. His scientific production conjugates mechanistic and fundamental aspects of heterogeneous photocatalysis with engineering issues for industrial applications. He has authored approximately 80 joint papers in collaboration with scientists from all over the world and several communications for international conferences on these topics. Leonardo Palmisano was born in Termini Imerese, Italy, in 1950. He obtained his B.Sc. degree in Chemistry cum laude in 1973 from the University of Palermo. He was a full professor of Chemistry in the Department of Engineering, University of Palermo, since 2000, and although he has now retired, he continues to carry out research. His scientific work mainly focuses on heterogeneous photocatalysis, such as preparation, characterization of many bulk and surface techniques, and testing of various types of bare and doped polycrystalline photocatalysts. He has collaborated with many scientists worldwide, producing joint papers in international journals (~350), many scientific and didactical books, and five patents. He is editorin- chief of the Journal of Photocatalysis and a member of the editorial boards of European Journal of Inorganic Chemistry, Current Organic Chemistry, International Journal of Photoenergy, Journal of Chemistry, and Journal of Membrane Science & Technology.