Synthesis of anatase TiO2 nanotubes derived from a natural leucoxene mineral by the hydrothermal method
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Author list: Aphairaj D., Wirunmongkol T., Niyomwas S., Pavasupree S., Limsuwan P.
Publisher: Elsevier
Publication year: 2014
Journal: Ceramics International (0272-8842)
Volume number: 40
Issue number: 7 PART A
Start page: 9241
End page: 9247
Number of pages: 7
ISSN: 0272-8842
eISSN: 1873-3956
Languages: English-Great Britain (EN-GB)
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Abstract
Anatase TiO2 nanotubes were synthesized from a natural leucoxene mineral by the hydrothermal method at 105 °C over a period of 24 h. The prepared samples were calcined at various temperatures from 100 to 1000 °C in air for 2 h. The samples were characterized by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), thermogravimetry-differential thermal analysis (TG-DTA), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and Brunauer-Emmett-Teller (BET) analysis to determine the specific surface area. The XRD patterns revealed that the as-synthesized samples were titanate (H2Ti3O 7) nanotubes. The as-synthesized samples calcined at 400 °C showed anatase TiO2 with inner and outer diameters of ∼6 nm and 16 nm, respectively, and lengths in the range of 20-100 nm. The BET surface area of the anatase TiO2 nanotubes was ∼82.98 m2/g. The photocatalytic activity of the anatase TiO2 nanotubes was observed to be higher than that of commercial anatase TiO2 nanoparticles (JRC-01). © 2014 Elsevier Ltd and Techna Group S.r.l.
Keywords
hydrothermal, Leucoxene, Nanotube
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