Biosynthesis of Magnetite-Nanoparticles Using Microalgae  (Spirulina sp. and Spirogyra sp.)

Authors

Hawar J. Sadiq Hawezy1 , Kwestan Hasan Sdiq2 , Vyan Asaad Qadr1 , Sewgil Saadulldeen Anwer2 , Shameran Jamal Salih1

Biosynthesis; Magnatite nano-particles; Biofunctionalization; Spyrogyra sp. Surface grafting

A promising avenue of research in materials science is to follow the strategies used by Mother-Nature

to fabricate ornate hierarchical structures as exemplified by organisms such as diatoms, sponges and

magnetotactic micro-algae. This paper focused on bio-synthesized magnetite nano-particles using eco

friendly method. Here, various microalgae have been used such as Spirulina sp. and Spirogyra sp. in order

to produce magnetite nano-particles. The iron oxide nano-particles of average size~45 nm were obtained.

Further, in this study different characterization technique’s applied to obtain the magnetic nano-particles,

scanning electron microscopy (SEM), energy dispersive X-Ray spectroscopy (EDX) and fourier-transform

infrared spectroscopy(FT-IR). Also, X-ray diffraction, techniques. Calculation to obtaining the crystallite size

by Debye-Scherrer equation. Also, The band gap parameters of the magneto-nanooxide such as indirect and

direct-band gap energie has been determined (Eg

opt = 1.87eV present sudy and Eg

opt = 4.3eV elsewhere).

Finaly, the results of this paper clearly indicated that iron oxide-NPs spherical shaped and average size of

particle is found to be below 100 nm.