Browsing by Author "Fatima Muhammad"

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    Exploring the Effects of Graphene Oxide Additives on Ag/NiFe2O4 Nanocomposites for Energy Storage Devices
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2025-07-25) Fatima Muhammad; CIIT/FA23-RPH-015/LHR; Dr. Mukhtar Ahmed; LHR TP 9846
    This study examines the production and characterization of Ag/NiFe₂O₄ nanocomposites enhanced with Graphene Oxide (GO) to improve their energy storage ability. X-ray diffraction (XRD) indicates the creation of a spinel NiFe₂O₄ structure with notable crystallographic planes (311), (220), and (440). The sharpness and intensity of the peaks imply strong crystallinity, whereas other characteristics corroborate the presence of Ag and GO. Raman spectroscopy confirms these findings by displaying specific vibrational modes. The spectra show expanded D and G bands in the GO-doped samples, indicating excellent integration of Graphene Oxide and improved structural disorder, which leads to greater electron mobility. Pure NiFe₂O₄, Ag-doped, and GO-incorporated samples show substantial differences, emphasizing GO's synergistic role in improving structural and electrical characterization. UV-Visible spectroscopy reveals a considerable decrease in band gap energy from 1.43 eV (pure NiFe₂O₄) to 0.237 eV (Ag/NiFe₂O₄), with a little rise to 0.264 eV with GO addition. The tunability of the band gap suggests increased conductivity and photo response, both of which are the desired characteristics for electrode materials in supercapacitors and other energy Storage Devices. Adding GO to Ag/NiFe₂O₄ nanocomposites increases crystallinity, structural flaws, and optical and electrical characteristics. These enhancements establish the composite as a promising contender for next-generation energy storage systems.