Dr. Dan Bahadur Pal Assistant Professor, Department of Chemical Engineering, Birla Institute of Technology, Mesra, Ranchi-835215, Jharkhand, India and his research area are Nanotechnology, Catalysis, Energy, Environment, Biomass application and wastewater treatment. He has also published around 25 research papers in journals, 15 book chapters and 18 conferences proceedings. Dr. Pardeep Singh Assistant Professor, Department of Environmental Science, PGDAV College, University of Delhi, New Delhi India and his research area are Nanotechnology, Energy, Environment, Biomass application and wastewater treatment. He has also published around 60 research papers in journals, 25 books edited, 39 book chapters.