Chapter 4: Synthesis and Characterization of Cobalt Doped Zinc Molybdenum Oxide (Co-ZnMoO4) Nanostructure for Energy Applications

Due to the unstoppable depletion of natural fossil fuels and ongoing climate change, the world is currently developing new eco-friendly renewable energy sources that are abundant on the planet. Consequently, electrochemical energy storage devices are an effective approach to replacing fossil fuels. Here, for the first time, Cobalt-doped Zinc molybdenum oxide nanostructures (Co-ZnMoO₄ NSs) with 2%,4% and 6% concentrations were synthesized via a hydrothermal process and annealing treatment and were subsequently characterized using a variety of characterization methods to explore their electrochemical and physical properties. SEM micrographs showed particle like structure with random agglomeration morphology. The doping of Co into ZnMoO₄ was verified by the EDX results. Raman spectroscopy showed the new emerging peak of the nanostructure and gives information about the vibrational modes. Ultraviolet spectroscopy study indicated the band gap decreases as the concentration of Co increases. Additionally, for the first time, the electrochemical properties of Co-ZnMoO₄ NSs were investigated. For high-performance supercapacitors, the synthesized electrode material is a better choice to address continued demands for energy storage devices.