ALAGARSAMY PANDIKUMAR, PHD, is Scientist at CSIR-Central Electrochemical Research Institute, Karaikudi, India. His research includes development of novel materials involving graphene, graphitic carbon nitrides, and transition metal chalcogenides in combination with metals, metal oxides, polymers and carbon nanotubes for applications in photocatalysis, photoelectrocatalysis, dye-sensitized solar cells and electrochemical sensor. KANDASAMY JOTHIVENKATACHALAM, PHD, is Professor of Chemistry at Anna University, BIT campus, Tiruchirappalli, India. His research interests include photocatalysis, photoelectrochemistry, photoelectrocatalysis, and chemically modified electrodes. KARUPPANAPILLAI B. BHOJANAA, MSc, is DST-INSPIRE Research Fellow at Functional Materials Division, CSIR-Central Electrochemical Research Institute, Karaikudi, India.