“…To date, microwave synthesis, solvothermal, sol-gel process, precipitation, and chemical vapor methods represent various synthesis methods developed for preparing metal oxide NPs. However, among them, the thermal decomposition of transition metal coordination complexes to nanoparticles of metal oxide NPs is of high priority due to its facile control of synthesis, crystal structure, NP size, precise choice of precursors, cost-e ectiveness, purity, and high yields [8].…”