Professor Rajan Jose is a senior Professor in the Universiti Malaysia Pahang (UMP) and is the Associate Editor-in-Chief of the Springer Nature journal Materials Circular Economy. He has published over 330 papers in the Web of Science (Thomson Reuters/Clarivate Analytics) indexed journals which are cited over 18300 times with an h-index of 68 according to Google Scholar database. He holds 25 patents. Stanford University places him as a top 2% Materials Scientists in the world ever since the list was produced during 2020. His current research interests include renewable energy devices, sustainable materials, circular economy, data science, and artificial intelligence Fabian Ezema is a Professor at the University of Nigeria, Nsukka, and a visiting professor to NRS-EMT (MATECSS UNESCO Chair) in Varennes, Quebec, Canada and iThemba Labs South Africa. He is also a Fellow of UNESCO-UNISA South Africa Chair in Nanosciences and Nanotechnology (U2ACN2). His research interests are in several areas of materials science including synthesis and characterization of particles and thin film materials through chemical routes with emphasis on energy applications.