Size effects in the Raman spectra of TiO2 nanoparticles

Choi, Hyun Chul; Jung, Young Mee; Kim, Seung Bin

doi:10.1016/j.vibspec.2004.05.006

Cited by 686 publications

(280 citation statements)

References 38 publications

Supporting

Mentioning

239

Contrasting

Unclassified

Order By: Relevance

“…For all annealing temperatures, Raman scattering reveals the presence of mixed (anatase and rutile) Raman active modes. The 665 cm -1 Eg peak position is shifted to higher wavenumbers compared with literature values [24], which indicate a decrease of the particle size [25]. The spectra also exhibit three main phonon modes, B1g, Eg, and Ag, which appear at 140, 433, and 617 cm -1 , respectively.…”

Section: Structural Propertiesmentioning

confidence: 52%

Annealing Temperature Effect on the Physical Properties of Titanium Oxide Thin Films Prepared by the Sol-Gel Method

K¹,

I²,

Jlassi³

et al. 2017

J Phys Chem Biophys

View full text Add to dashboard Cite

Section: Structural Propertiesmentioning

confidence: 52%

Annealing Temperature Effect on the Physical Properties of Titanium Oxide Thin Films Prepared by the Sol-Gel Method

K¹,

I²,

Jlassi³

et al. 2017

J Phys Chem Biophys

View full text Add to dashboard Cite

“…There is no shift in the peaks. As reported in the literature [5,[15][16][17]] the recorded Raman spectrum of tetragonal anatase TiO 2 has six allowed modes that appear at 144 cm −1 (Eg), 197 cm −1…”

Section: R a M A N S P E C T R O S C O P Ymentioning

confidence: 81%

Characterization of TiO₂ films obtained by a wet chemical process

Sedik

Ferraria

Carapeto

et al. 2017

Journal of Electrical Engineering

View full text Add to dashboard Cite

TiO 2 has an easily tunable bandgap and a great absorption dye ability being widely used in many fields and in a number of fascinating applications. In this study, a wet chemical route, particularly a sol gel method using spin-coating is adopted to deposit TiO 2 thin films onto soda lime glass and silicon substrates. TiO 2 films were prepared by using an alcoholic solution of analytical reagent grade TiCl 4 as titanium precursor at various experimental conditions. The accent was put on the conditions of preparation (spin time, spin speed, precursor concentration, number of coating layers etc), doping and on the post-deposit treatment namely the drying and the crystallization. The results showed a strong dependence on the drying temperature and on the temperature and duration of the crystallization. We found that the solution preparation and its color are important for getting a reproducible final product. The Raman spectra recorded at room temperature, showed the characteristic peaks of anatase which appear at 143 and around 396 cm −1 . These peaks confirm the presence of TiO 2 . The X-ray diffraction (XRD) was used to identify the crystalline characteristic of TiO 2 while the chemical states and relative amounts of the main elements existing in the samples were investigated by X-ray Photoelectron Spectroscopy (XPS). The morphology of the samples was visualized by AFM. We show by this work the feasibility to obtain different nanostructured TiO 2 by changing the concentration of the solution. Photocatalytic activity of TiO 2 films was evaluated. Rhodamine B is a recalcitrant dye and TiO 2 was successfully tested for its oxidation. An abatement of 60% was obtained under sunlight for an initial concentration of 10 mg/l. K e y w o r d s: Titanium oxide, spin-coating, XPS, Raman, XRD

show abstract

“…For the catalyst 4% Cd-Ce 0.2 -TiO x , the Raman peaks located at 143, 194, 395, 512, 640 cm −1 are associated with anatase TiO 2 . Raman peaks located at 468 cm −1 is assigned to fluorite ceria, but it's not obvious, and there is no vibration peak assigned to Cd oxide [23,24]. This means that Cd is well dispersed over Ce 0.2 TiO x support.…”

Section: Raman Resultsmentioning

confidence: 99%