TiO₂Nanorods Preparation from Titanyl Sulphate Produced by Dissolution of Ilmenite

Abstract

Abstract. One-dimensional titanium oxides (TiO 2 ) nanorods have substantial applications in photocatalytic, nanoelectronic, and photoelectrochemical solar cells. These applications require large quantities of materials and a production technique suitable for future industry fabrication. We demonstrate here a new method of TiO 2 nanorods production from ilmenite sands (FeTiO 3 ). In this process, the roasted ilmenite sand was separated from the iron content and dissolved in the sulphuric acid solution. Separation process of TiO 2 from ilmenite has been carried out by roasting, leaching and precipitation processes. The roasting process was conducted by the addition of Na 2 S at a temperature of 800°C that had been deomposed ilmenite into hematite (Fe 2 O 3 ), anatase TiO 2 , rutile TiO 2 , Na 2 SO 4 , NaFeS 2 and NaFeO 2 . Separation TiO 2 from titanyl sulfate (TiOSO 4 ) after leaching in H 2 SO 4 solution was conducted by hydrolysiscondensation step and complexation step of Fe 2+ content. KCNS solution was used as a complexing agent. The xerogel synthesized TiO 2 then was prepared to 1-D nanostructure of TiO 2 nanorods by hydrothermal process under alkaline condition. By the two-step method, we finally gain the 1D nanorods TiO 2 extracted from ilmenite sand. The characterization using the Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) obtained the nanorod morphology at a diameter about 9.6 nm.

Study of influence of iron, phosphorus, potassium, tantalum and fluorine on the properties of TiNb2O7

“…the gases from the reactions are exhausted in the synthesis system, as well as the water contained, in the form of steam and conducted to a gas scrubber system. The reaction is proposed below in 2 reactional steps (Wahyuningsih, 2017).…”

Leaching of ilmenite to produce titanium based materials: a review

“…Ilmenite obtained from Bangka, Indonesia was subjected to a more elaborate digestion procedure by Refs. [44,[64][65][66]. Ilmenite was preoxidized in open air for 6 h at temperatures ranging from 400 to 1100 °C.…”

“…When Na 2 S is added to ilmenite before roasting, Upon treatment with H 2 SO 4 (3, 3.5, 4.5, 6 and 9 M) the following reactions may occur and it was found that the ilmenite was more soluble in 6 M H 2 SO 4 . Fe 2+ and Fe 3+ ions are complexed with KSCN to prevent the contamination of the intermediate TiO(OH) 2 formed during the hydrolysis-condensation process of titanyl sulfate to produce TiO 2 as the final product [44,[64][65][66],…”