Synthesis And Characterization Of Multifunctional Nanohydroxyapatite Modified With Bismuth And Iron For Defluoridation, Photocatalysis And Antibacterial Studies

Abstract

Water Pollution And Bacterial Infection Are Two Serious Problems In The Globe. The Substitution Of Metal Ions In The Hydroxyapatite (Ha) Structure Enhances Its Application For Water Treatmentand Antibacterial Activity. This Work Applied Co-Precipitation Technique To Synthesize Pristineas Well As Bi3+ And Fe3+Doped Ha Nanomaterials For The Investigation Of Fluoride (F?�?) Ionsremoval, Methyl Orange (Mo) Dye Degradation, And Antibacterial Activity Against E. Coli And. Aureus Bacteria. X-Ray Diffraction Characterization Results Revealed That The Synthesized Hanano Materials Have Hexagonal Structures With A Space Group Of P63/M, And Crystallite Size In The Range Of 15.21 ?�? 25.67 Nm. The Size Variation Associated With The Difference In Ionic Radii Of Ca2+, Fe3+ And Bi3+ Ions. Elemental Composition Analysis Inferred That Calcium To Phosphorous Ratio Decreased As The Amount Of Bi3+ And Fe3+ Increased In The Dopant, Which Shows Direct Replacement Of Ca2+ Ions. Brunauer-Emmette-Teller Analysis Confirms The Surfaceareas Of Pristine, Bi3+ Doped, Fe3+ Doped, And Fe3+ And Bi3+ Co-Doped Samples Are 49.77,55.01, 117.62, And 130.24 M2/G, Respectively. Optical Property Analysis Showed That The Energy Bandgap Of The Nanomaterials Decreased As The Amount Of Bi3+ And Fe3+ Increased In The Doped Ha Nanomaterials, Due To The Presence Of The Different Electronic Transition Of The Dopant Ions.In The Batch F?��? Ions Adsorption Experiment, Maximum Adsorption Capacities Of 66.12, 78.71,80.93, And 97.36 Mg/G Were Obtained For Pristine, Bi3+Doped, Fe3+Doped, And Bi3+ And Fe3+Co-Doped Adsorbents, Respectively. This Indicates That The Active Sites Of Ha Nanomaterial Increased Through Bi3+ And Fe3+Ions Doping. Similarly, The Co-Doped Ha Nanomaterials Showed Better Photocatalytic Degradation Of Mo Dye Over The Pristine And Single-Dopedsamples Due To