Narinder Singh obtained his post-graduation (M. Sc.) degree from Panjab University, India in 2005. He worked over 15 years as an Assistant Professor in 08 different higher education institutions. He received his Ph. D. degree from Indus International University, India in 2021. He has published more than 07 peer-reviewed research articles, 02 conference proceedings, 02 chapters and 01 book (as a sole author) for undergraduate students.

His current area of interest includes green synthesis, properties and applications of inorganic, organic nanostructures and their nanohybrids for energy and environmental remediation applications. Ashish Kumar obtained his Ph.D. degree from Indian Institute of Technology Mandi, India, in October 2021. He has published 41 research articles with 25 h-index and 2520 citations as per Google Scholar to date. His area of research interest includes the design and development of efficient materials for sustainable energy and environment-oriented applications.