Corrigendum to 'Realization of high photocatalytic hydrogen generation activity by nanostructured Ga1-xZnxO1-zNz solid-solution without co-catalyst' Int J Hydrogen Energy 40 (2015) 13901–13908. (20th September 2019) - Menon, Sumithra Sivadas; Kuppulingam, B.; Baskar, K.; Sairam, T.N.; Ravindran, T.R.; Gupta, Bhavana; Singh, Shubra