ACTIVE-ILMENITE SURFACE STRUCTURE INFLUENCE ON ACID-ASSISTED BALL MILLING

Weerachon Phoohinkong, Sorapong Pavasupree, Kanokthip Boonyarattanakalin, Wanichaya Mekprasart and Wisanu Pecharapa
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Weerachon Phoohinkong: College of Nanotechnology, King Mongkut’s Institute of Technology Ladkrabang KMITL, Bangkok 10520, Thailand
Sorapong Pavasupree: #x2020;Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Klong 6, Pathumthani 12110, Thailand
Kanokthip Boonyarattanakalin: College of Nanotechnology, King Mongkut’s Institute of Technology Ladkrabang KMITL, Bangkok 10520, Thailand
Wanichaya Mekprasart: College of Nanotechnology, King Mongkut’s Institute of Technology Ladkrabang KMITL, Bangkok 10520, Thailand
Wisanu Pecharapa: College of Nanotechnology, King Mongkut’s Institute of Technology Ladkrabang KMITL, Bangkok 10520, Thailand

Surface Review and Letters (SRL), 2018, vol. 25, issue Supp01, 1-11

Abstract: Active-ilmenite powder derived from natural ilmenite sand was prepared by the ball milling process with acid-solution and Deionized (DI) water. Morphology and particle size of active-ilmenite product in acid/DI-assisted ball milling process were monitored by field emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM). Surface atomic component and chemical bonding were investigated by X-ray photoelectron spectroscopy (XPS). Meanwhile, bulk chemical oxidation and fine structure of active-ilmenite were studied by X-ray absorption near edge structure (XANES) and extended X-ray absorption ne-structure spectroscopy (EXAFS) to confirm the oxidation state and local active species structure at surface. Active-ilmenite by acid-assisted ball milling process is a distinctive method for the preparation of active-ilmenite product with high active surface. Moreover, the distortion of TiO6 and FeO6 octahedral cluster on the sample surface was detected in all milled samples with acid-assisted ball milling process. The presence of Fe2+, Fe3+ ions and miniature sulfate was also detected on the sample surface by milled product with acid-assisted method.

Keywords: Ilmenite; FeTiO3; ball milling; XANES; EXAFS (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1142/S0218625X18400061

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