Comparative study of NiO/CuO/Ag doped graphene based materials for reduction of nitroaromatic compounds and degradation of dye with statistical study oleh Gayatri Pandey, Nidhi Singh, Nitesh Rajput, Mahesh Kumar Saini, S. L. Kothari, Jagdish Prasad, Narendra Pal Lamba, Manmohan Singh Chauhan