The use of nanoparticles in the field of catalysis has been the object of study by the scientific community, due to the high catalytic activity that the nanoparticles have in front of some reactions of technological interest. The objective of this work is to obtain a nanostructured catalyst using iron oxide supported on red ceramic residue (RCV), through nanostructures synthesized by the hydrothermal method, measured through the absorption of lightning in the XANES region through the National Laboratory of Synchrotron Light LNLS)