Thermal stability and phase transformation of TiO2 nanowires at various temperatures

• Published in: Microelectronic engineering Vol. 108; pp. 134 - 137
• Main Authors: Asiah, M.N., Mamat, M.H., Khusaimi, Z., Achoi, M.F., Abdullah, S., Rusop, M.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.08.2013; Elsevier
• Subjects: Anatase-rutile transformation; Annealing; Annealing effect; Applied sciences; Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder; Cross-disciplinary physics: materials science; rheology; Diffraction patterns; Exact sciences and technology; Heat treatment; Hydrothermal method; Materials science; Metals. Metallurgy; Morphology; Nanopowders; Nanoscale materials and structures: fabrication and characterization; Nanostructure; Nanowires; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physics; Production techniques; Quantum wires; Rutile; Titanium dioxide; Titanium dioxide nanowires; Titanium dioxide nanowires; Hydrothermal method; Anatase-rutile transformation; Annealing effect; Scanning electron microscopy; Powders; Annealing; Anatase; Phase transformations; XRD; Field emission electron microscopy; Thermal stability; Sodium hydroxide; Hydrothermal growth; Rutile structure; Hydrothermal synthesis; Aqueous solutions; Morphology; Nanowires; Nanopowder; Microstructure; Titanium oxide; Nanostructured materials
• ISSN: 0167-9317; 1873-5568
• DOI: 10.1016/j.mee.2013.02.010

[Display omitted] ► Synthesis of TiO2 nanowires by simple hydrothermal method. ► The influence of annealing temperature was investigated. ► FESEM showed TiO2 nanowires maintain their structures up to certain temperature. ► As-prepared nanowires transformed to anatase structure at 500°C. ► At 900°C, nanowires transform into rod-shaped rutile structure. In this paper, we report the successful synthesis of titanium dioxide nanowires by a hydrothermal method. The precursor, TiO2 nanopowder, was treated in a 10M sodium hydroxide aqueous solution at 150°C for 6h, followed by annealing at 400–900°C. The morphology and structural properties of the nanowires were investigated. The field-emission scanning electron microscopy (FESEM) images and the X-ray diffraction (XRD) pattern showed that the nanowires transformed into an anatase structure at 500°C and that the morphology of the nanowires was maintained. At 900°C, the nanowires transformed into a rod-like shapes with a rutile structure.