Correlation of Nano Titanium Dioxide Synthesis and the Mineralogical Characterization of Ilmenite Ore as Raw Material
A study on mineral characterization and nano titanium dioxide synthesis from ilmenite ore of Bangka Island, Indonesia, has been carried out using a caustic fusion method and hydrochloric acid leaching. Comprehensive mineral characterization was conducted using X-ray fluorescence spectroscopy (XR...
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| Autores principales: | , , , , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Universitas Indonesia
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/b6bced0ac40a457891efe76a76a9abd3 |
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| Sumario: | A study on mineral characterization and nano
titanium dioxide synthesis from ilmenite ore of Bangka Island, Indonesia, has
been carried out using a caustic fusion method and hydrochloric acid leaching.
Comprehensive mineral characterization was conducted using X-ray fluorescence
spectroscopy (XRF) and X-ray diffraction (XRD) to depict each fractionated
particle's elemental composition and mineralogy, i.e., +80, ?80+100, ?100+150, ?150+200,
-200+325, and -325 mesh. Other analyses performed are VSM to measure the
magnetic properties and SEM to determine the distribution of elements at each
particle size. Based on the characteristics of the ilmenite ore, magnetic
separation was applied for the initial stage and analyzed gravimetrically.
Later processing was the synthesis of nano titanium dioxide, conducted
sequentially, including roasting and leaching. Roasting was run at 900°C with
and without caustic soda, and then hydrochloric acid was applied. In reference
to the elemental analysis, titanium (Ti) concentration is higher in smaller
particle sizes and vice versa for iron (Fe) concentration, so the synthesis of
nano titanium dioxide was carried out using a -100+150 mesh particle size. The
optimum condition for nano titanium dioxide synthesis was 2:1 of NaOH and
ilmenite weight ratio, 20% HCl concentration, and 4 hours of leaching time. The
nano titanium dioxide (TiO2) obtained was then characterized using
XRF, XRD, particle size analyzer (PSA), and transmission electron microscopy
(TEM). Roasting with caustic soda showed better nano titanium dioxide purity
with 96.04% of TiO2 with particle size in the range of 50–80
nanometers. |
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