Cobalt ferrite nanoparticles are functionalized with biotin and lawsone and are characterized using dynamic light scattering (DLS), zeta potential, thermogravimetric analysis (TGA), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM) and phase contrast
microscopy. TGA and FTIR analysis confirm the adsorption of biotin and lawsone on the nanoparticles. Upon functionalization of nanoparticles with biotin and lawsone, they acquire negative charge and show an increased hydrodynamic diameter. The phase contrast microscopy images show the formation
of reversible chain-like structures under an external magnetic field, indicating the strong adsorption of biotin and lawsone molecules. The functionalized nanoparticles are examined for their ability to remove rhodamine B dye and lead ions from water. The percentage removal of rhodamine B
by biotin and lawsone functionalized nanoparticles is found to be ~89%. Similarly, the percentage removal of lead ions by nanoparticles functionalized with biotin and lawsone is found to be 42 and 82 %, respectively. The uncoated nanoparticles were not suitable for removing rhodamine and lead
ions. In summary, both biotin and lawsone functionalized nanoparticles are found to be efficient for the removal of rhodamine-B. Nanoparticles functionalized with lawsone are found to be a better system for the removal of lead ions than biotin functionalized nanoparticles. These functionalized
nanoparticles are ideal for the removal of dye and the metal ion from aqueous system, since the nanoparticles are easy to retrieve using a magnet.
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Document Type: Research Article
Smart Materials Section, MTPD, Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam 603102, India
Kanchi Mamunivar Centre for Post Graduate Studies, Puducherry 605008, India
Publication date: August 1, 2017
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Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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