SEM image of extracted CoS.
Samia A. Kosa, Eman Z. Hegazy
CC BY 4.0
Samia A. Kosa et. al. "Extraction of Nanosized Cobalt Sulfide from Spent Hydrocracking Catalyst", Journal of Nanomaterials <a rel="nofollow" class="external text" href="https://doi.org/10.1155/2013/471210">doi:10.1155/2013/471210</a>