Beta vulgaris aided green synthesis of ZnO nanoparticles and their luminescence, photocatalytic and antioxidant propertiesM. A. Pavan Kumar, D. Suresh, H. Nagabhushana and S. C. SharmaEur. Phys. J. Plus, 130 6 (2015) 109DOI: https://doi.org/10.1140/epjp/i2015-15109-2