Synthesis of visible light active Gd3+-substituted ZnFe2O4 nanoparticles for photocatalytic and antibacterial activitiesS. B. Patil, H. S. Bhojya Naik, G. Nagaraju, R. Viswanath and S. K. RashmiEur. Phys. J. Plus, 132 8 (2017) 328DOI: https://doi.org/10.1140/epjp/i2017-11602-x