Nanomaterial is an emerging material with potential technological impacts in various. Advancements in nanoscience and nanotechnology have significantly impacted the widespread integration of iron-based nanomaterials across various domains of scientific investigation, research institutions, and industrial sectors. The intrinsic properties exhibited by iron oxide nanoparticles, such as their biocompatibility, low toxicity, catalytic behaviors, and versatility in engaging in various reaction pathways, have positioned these nanoparticles as highly promising candidates for a wide range of biomedical uses. The use of botanical extracts in producing iron-based nanomaterials is gaining recognition for their capacity to reduce and stabilize these materials during manufacturing efficiently. MNPs with higher magnetic moments, non-fouling surfaces, and increased functionalities are now being developed for applications in the detection, diagnosis, and treatment of malignant tumors, cardiovascular disease, and neurological disease. Iron-based nanomaterials supercapacitors are a promising energy storage solution in the face of increasing demand for electrification.