Synthesis, characterization, and optical properties of NiCr2O4 and CoCr2O4 spinel nanostructures for photocatalytic applicationsKhaled Mahi, Kada El Assad Zemallach Ouari, Rabah Mostefa and Mohamed TrariEur. Phys. J. Appl. Phys., 100 (2025) 2DOI: https://doi.org/10.1051/epjap/2024026
