<p>Magnetite (Fe₃O₄) and strontium spinel ferrite (SrFe₂O₄) nanoparticles were prepared effectively using co-precipitation method. FT-IR, SEM, and XRD analyses were performed to confirm NPs structure. Inclusion of CTAB as a surfactant agent increased the crystal size ⁓ 13.60 to 83.93&#xa0;nm and increased the lattice constant, while maintaining the spinel ferrite cubic crystal structure. According to SEM micrographs, CTAB significantly altered the shape structure from cauliflower to cubic, with grain sizes ranging from 53.78 ± 0.92 to 141.4 ± 2.2&#xa0;nm. The spinel cubic structure with a crystal size of 22.85&#xa0;nm is formed when Fe²⁺ is used during preparation steps; however, SrFe₂O₄ sample is indexed as a hematite rhomboidal structure in addition to a few other phases. Superparamagnetic properties, coercivity (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(Hc\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi mathvariant="italic">Hc</mi> </mrow> </math></EquationSource> </InlineEquation>), and maximum magnetization (59.73-74.71) emu/g were observed in vibrating sample magnetic (VSM) examinations with no notable change in CTAB. When pure ferric salt is used to prepare NPs, it is altered to hematite with low magnetization and high coercivity (55&#xa0;emu/g). Notably, electrocatalytic degradation increased significantly to 97.46 ± 0.96% for <i>Fluorescein</i> and 94.98 ± 1.1% for <i>Carmine</i> dyes. The relationship between frequency and AC conductivity is directly proportional in each sample. For Fe₃O₄ with/without CTAB incorporation, SrFe₂O_4-δ, and SrFe₂O₄ NPs, frequency exponent factor (<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(s\)</EquationSource> <EquationSource Format="MATHML"><math> <mi>s</mi> </math></EquationSource> </InlineEquation>) is equivalent to 0.72, 0.80, 0.725, and 0.71, demonstrating that the correlated barrier hopping (CBH) hypothesis describes conduction process.</p>