Facile method to synthesis of anatase TiO₂ nanorods

Abstract

formation TiO 2 nanorods. The structure of the sample was studied by X-ray diffraction and it revealed that the prepared TiO 2 exhibit a pure anatase phase. While the Fourier transform infrared spectroscopy (FTIR) was showing the vibration patterns in the spectrum of the sample. The morphology of sample was studied by scanning electron microscopy (SEM) and it showed that the synthesised TiO 2 made of nanorods with length about (698 nm) and a diameter (220 nm). IntroductionTitanium dioxide (TiO 2 ) is a semiconductor material that has a wide energy gap (3.2 eV) [1, 2]. Many studies have been focused in the present time on TiO 2 , due to its large surface area and characteristic electrical properties such as physical and chemical stability, high refractive index, low cost, non-toxicity and high photo-catalytic activities…etc. TiO 2 can be found in three crystalline phases: anatase, rutile both tetragonal structure and brookite with orthorhombic structure. Each of these phases have various chemical and physical properties depending on the composition of the atoms, thus leads to a varied performance in its application [3,4]. Anatase and brookite are metastable, while rutile phase is stable under certain conditions [5]. The anatase and brookite phases are easily turned to rutile phase during a high temperature [6,7]. Different morphologies of TiO 2 have been synthesized such as nanorods, nanowires, nanotubes, nanoparticles and nanobelts…etc. One dimension (1D) structures of TiO 2 especially nanorods, nanowires and nanotubes have been attracted a lot of attention due to the unique properties and great applications comparison nanoparticles. TiO 2 with (1D) structures have exhibited the faster process of generating electron-hole and a lower recombination rate comparison TiO 2 nanoparticle [8,9]

Thermal Annealing Effect on Hydrothermal Synthesized Li4Ti5O12/TiO2 as Anode Material for Lithium-Ion Batteries

“…We note that all spectra show the presence of three peaks characteristic of Ti-O bonds in TiO 2 materials, approximately at 535 cm −1 , 677 cm −1 , and 760 cm −1 , respectively. 31,32 The presence of carbon bonds (C-O Using cyclic voltammetry, we can determine the potential required for the insertion/disinsertion of lithium ions in the active material. In our work, cyclic voltammetry curves were recorded in the voltage range from −3.2 V to 0.5 V, with a scan speed of 5 mV s −1 .…”

Effect of Ethylene Glycol:Citric Acid Molar Ratio and pH on the Morphology, Vibrational, Optical and Electronic Properties of TiO2 and CuO Powders Synthesized by Pechini Method

“…The spectra only present a broad band in the range of 500 to 1000 cm −1 , a region in which the anatase phase of TiO 2 shows its characteristic peaks [35,36], reflecting the high purity with which this oxide was synthesized, a result consistent with the XRD observations. Additionally, the shape of this band, wide and with two small minima associated with vibrations due to stretching of the Ti-O and Ti-O-Ti bonds, indicates that the TiO 2 powders, despite being made up of conglomerates of nanocrystallites, have a vibrational behavior typical of nanoparticles [37][38][39][40][41][42] or nanocrystalline mesoporous powders [43], a spectrum that differs from that found in commercial powders and nanorods, which have well-defined peaks or a noisy spectrum within the range between 400 and 1000 cm −1 [44][45][46]. In a comparable way to TiO 2 , the FTIR spectra taken of CuO powders show only representative peaks in the range of 500 and 625 cm −1 , a region in which CuO presents its vibrational modes, thus demonstrating its high purity and nanoparticle vibrational behavior [14].…”

Synthesis of Ag decorated TiO2 nanoneedles for photocatalytic degradation of methylene blue dye

“…It has three natural polymorphs phases: rutile, anatase, and Brookite. The average distances between the Ti 4+ ions in anatase are lower than rutile, rendering it less stable thermodynamically [20,21]. The phase transition from anatase to rutile, however, involves substantial thermal activation and occurs between 700°C-1000 °C depending on the size of the crystal and the quality of the impurity [22][23][24].…”