It has become increasingly popular in recent years to create improved functionalized nanomaterials in an effort to enhance their physicochemical, catalytic, and biological capabilities. In this study, eco-friendly, especially water dispersible bio-nanocomposites containing metal ferrite, MFe2O4 (M: Cu, Ni, Cd, Mn and Co) nanoparticle were synthesized low-cost method from hemp biomass and characterized by ATR-FTIR, XRD, SEM, TEM (STEM), EDX, VSM, Uv-Vis and TG/DTG analyses. The variation of their ionic conductivity with temperature and concentration and also their catalytic effects against cationic dyes such as methylene blue (MB), crystal violet (CrV) and malachite green oxalate (MGO) were investigated. XRD patterns and FTIR spectra of the AHB-MFe2O4, especially the stretching of Fe-O and M-O, showed the formation of metal ferrite bio-nanocomposites. Also, interaction between the biomass and metal ferrite nanoparticles was obviously seen from XRD patterns and FTIR spectra of the AHB-MFe2O4. It was determined that AHB-MFe2O4 bio-nanocomposites have high thermal stability, high ionic conductivity and negative surface charge. Moreover, they exhibited high catalytic performance against cationic dyes such as MB, CrV and MGO.
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