Fabrication, characterization and Raman study of TiO2 nanowire arrays prepared by anodic oxidative hydrolysis of TiCl3

Lei, Yong; Zhang, L.D.; Fan, J.C.

doi:10.1016/s0009-2614(01)00263-9

Cited by 198 publications

(114 citation statements)

References 22 publications

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“…Figure 8 shows the optical band gap calculation scheme of the deposited film: it was found as 3.45 eV and the absorption edge was red shifted. The average value of the band gap of the bulk anatase is 3.2 eV [29]. The band gap widening in the TiO 2 films is mainly attributed to the contribution of crystallite size effects [30,31].…”

Section: Optical Propertiesmentioning

confidence: 99%

Structural and optical properties of electrohydrodynamically atomized TiO2 nanostructured thin films

et al. 2012

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In this paper, we report an alternate technique for the deposition of nanostructured TiO 2 thin films using the electrohydrodynamic atomization (EHDA) technique using polyvinylpyrrolidone (PVP) as a stabilizer. The required parameters for achieving uniform TiO 2 films using EHDA are also discussed in detail. X-ray diffraction results confirm that the TiO 2 films were oriented in the anatase phase. Scanning electron microscope studies revealed the uniform deposition of the TiO 2 . The purity of the films is characterized by using Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS), confirming the presence of Ti-O bonding in the films without any organic residue. The optical properties of the TiO 2 films were measured by UV-visible spectroscopy, which shows that the transparency of the films is nearly 85% in the visible region. The current-voltage (I -V ) curve of the TiO 2 thin films shows a nearly linear behavior with 45 m cm of electrical resistivity. These results suggest that TiO 2 thin films deposited via the EHDA method possess promising applications in optoelectronic devices.

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Section: Optical Propertiesmentioning

confidence: 99%

Structural and optical properties of electrohydrodynamically atomized TiO2 nanostructured thin films

et al. 2012

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“…It should be noted that the frequency of the 144 cm -1 band is very intense and sharp and is nearly equal to that of the rutile phase, which is at 143 cm -1 . However, the difference is that the rutile phase band is sharp but weak (Ohsaka et al 1978;Lei et al 2001). This is important because it confirms that doping the TiO 2 with metal ions does not alter the phase, which is a very important feature when studying the degradation of organic pollutants by photo active semi-conductors.…”

Section: Raman Spectroscopymentioning

confidence: 95%

Synthesis and characterization of carbon-covered alumina (CCA) supported TiO2 nanocatalysts with enhanced visible light photodegradation of Rhodamine B

Mahlambi

Mishra

et al. 2012

Nanotechnology for Sustainable Development

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The anatase phase of titania (TiO 2 ) nanophotocatalysts was prepared using a modified sol gel process and thereafter embedded on carbon-covered alumina supports. The carbon-covered alumina (CCA) supports were prepared via the adsorption of toluene 2,4-diisocyanate (TDI) on the surface of the alumina. TDI was used as the carbon source for the first time for the carbon-covered alumina support system. The adsorption of TDI on alumina is irreversible; hence, the resulting organic moiety can undergo pyrolysis at high temperatures resulting in the formation of a carbon coating on the surface of the alumina. The TiO 2 catalysts were impregnated on the CCA supports. X-ray diffraction analysis indicated that the carbon deposited on the alumina was not crystalline and also showed the successful impregnation of TiO 2 on the CCA supports. In the Raman spectra, it could be deduced that the carbon was rather a conjugated olefinic or polycyclic hydrocarbons which can be considered as molecular units of a graphitic plane. The Raman analysis of the catalysed CCAs showed the presence of both the anatase titania and D and G band associated with the carbon of the CCAs. The scanning electron microscope micrographs indicated that the alumina was coated by a carbon layer and the energy dispersive X-ray spectra showed the presence of Al, O and C in the CCA samples, with the addition of Ti for the catalyst impregnated supports. The Brunauer Emmet and Teller surface area analysis showed that the incorporating of carbon on the alumina surface resulted in an increase in surface area, while the impregnation with TiO 2 resulted in a further increase in surface area. However, a decrease in the pore volume and diameter was observed. The photocatalytic activity of the nanocatalysts was studied for the degradation of Rhodamine B dye. The CCA-TiO 2 nanocatalysts were found to be more photocatalytically active under both visible and UV light irradiation compared to the free TIO 2 nanocatalysts.

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“…So far many kinds of nanowire and nanotube arrays have been prepared using anodic alumina membranes, which include metals, [7,8] semiconductors, [7,[9][10][11] carbon, [12,13] polymers, [14] and other types of materials. After the deposition of the nanowires or nanotubes into the pores of the alumina membranes, the nanowires or nanotubes can be released from the template by simply removing the alumina membranes using acid or alkali solutions, and finally resulting in free-standing nanowire or nanotube arrays.…”

Section: Nanowires and Nanotubesmentioning

confidence: 99%

“…Usually the alumina nano-porous membranes are used to prepared ordered arrays of one-dimensional nanostructures including nanowires and nanotubes. [7][8][9][10][11][12][13][14] Using a two-step replication process, metallic and semiconductor nano-porous membranes can be prepared using the alumina membranes as the original. [5,[15][16][17] Moreover, recent research concerning a surface nano-patterning technique [6,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] using ultra-thin alumina membranes (UTAMs) has successfully fabricated ordered arrays of surface zero-dimensional nanostructures including nanodots and nanoholes.…”

Section: Introductionmentioning

confidence: 99%

Ordered Arrays of Nanostructures and Applications in High‐Efficient Nano‐Generators

Lei

Jiao

et al. 2007

Adv Eng Mater

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Large‐scale ordered nanostructure arrays on substrates, including nanowires, nanotubes, nanodots, and nano‐holes, can be fabricated using template fabrication processes. The controllable structural parameters and properties of the ordered nanostructure arrays make them quite suitable to be used in many device‐related application areas. It is shown that large‐scale nanowire arrays are good candidates for the realization of a nano‐generator based on the piezoelectric effect of ZnO nanowires. The mechanism of a proposed high‐efficient nano‐generator based on an assembled nanowire/nanohole embedded structure shows high application potentials for biological and nanometer‐sized devices.

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Fabrication, characterization and Raman study of TiO2 nanowire arrays prepared by anodic oxidative hydrolysis of TiCl3

Cited by 198 publications

References 22 publications

Structural and optical properties of electrohydrodynamically atomized TiO2 nanostructured thin films

Structural and optical properties of electrohydrodynamically atomized TiO2 nanostructured thin films

Synthesis and characterization of carbon-covered alumina (CCA) supported TiO2 nanocatalysts with enhanced visible light photodegradation of Rhodamine B

Ordered Arrays of Nanostructures and Applications in High‐Efficient Nano‐Generators

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