Microstructure of nanosized TiO2 obtained by sol-gel synthesis

Gotić, Marijan; Ivanda, Mile; Sekulić, Andreja; Musić, Svetozar; Popović, Stanko; Turković, Aleksandra; Furić, Krešimir

doi:10.1016/0167-577x(96)00061-4

Cited by 97 publications

(42 citation statements)

References 17 publications

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“…1b). Such an upward shift of the anatase band at 144 cm -1 can be explained by a decrease in the size of the anatase particles [60][61][62] and the breaking of the TiO 2 stoichiometry [63][64][65]. During the milling process, the band of anatase at 632 cm -1 was overlapped with a rutile band appearing at 611 cm -1 , so the resulting band was shifted to the lower position.…”

Section: Raman Measurements Of Ball-milled Crystallinementioning

confidence: 99%

The mechanochemical stability of hydrogen titanate nanostructures

Plodinec¹,

Friščić²,

Iveković³

et al. 2010

Journal of Alloys and Compounds

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The structural stability of some nanostructured titanates was investigated in terms of their subsequent processing and possible applications. With the aim to investigate their mechanochemical stability, we applied high-energy ball milling and studied the resulting induced phase transitions. Hydrogen titanates with two different morphologies, microcrystals and nanotubes, were taken into consideration. The phase-transition sequence was studied by Raman spectroscopy and X-ray powder diffraction, while the morphology and crystal structure, on the nanoscale, were analyzed by high-resolution transmission electron microscopy. During the mechanochemical treatment of both morphologies, the phase transitions from hydrogen titanate to TiO2 anatase and subsequently to TiO2 rutile were observed. In the case of hydrogen trititanate crystals, the phase transition to anatase starts after a longer milling time than in the case of the titanate nanotubes, which is explained by the larger particle size of the crystalline powder. However, the phase transition from anatase to rutile occurred more quickly in the crystalline powder than in the case of the nanotubes.

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Section: Raman Measurements Of Ball-milled Crystallinementioning

confidence: 99%

The mechanochemical stability of hydrogen titanate nanostructures

Plodinec¹,

Friščić²,

Iveković³

et al. 2010

Journal of Alloys and Compounds

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“…34 Despite the number of publications related to SnO 2 and Raman spectroscopy, however, they have not generally been reported for SnO 2 . [12][13][14][15] An exception to this is our previous paper 11 in which we demonstrated them to be an effective way of evaluating not only the average nanoparticle size, but also the whole size distribution.…”

Section: Low Frequency Modes Of Sno 2 Nanoparticlesmentioning

confidence: 99%

The complete Raman spectrum of nanometric SnO2 particles

Diéguez

Romano‐Rodríguez

Vilà

et al. 2001

Journal of Applied Physics

741

422

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The complete Raman spectrum of SnO 2 nanoparticles in presented and analyzed. In addition to the ''classical'' modes observed in the rutile structure, two other regions shown Raman activity for nanoparticles. The Raman bands in the low-frequency region are attributed to acoustic modes associated with the vibration of the individual nanoparticle as a whole. The high-frequency region is activated by surface disorder. A detailed analysis of these regions and the changes in the normal modes of SnO 2 are presented as a function nanoparticle size.

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“…have been studied to enhance the decomposition efficiency [3]- [5]. On the other hand, sol-gel, reactive sputtering, vacuum evaporation, chemical vapor deposition and so on have been also studied to fabricate anatase-TiO 2 layer [6]- [8], in which the orientation, the surface roughness, the defects etc. are expected to be control in addition to fabrication of the multilayer [9].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photo-Induced Property of LPCVD-TiO<SUB>2</SUB> Layer on PCVD-TiO<SUB>x</SUB> Initial Layer

Yamauchi¹,

Yamamoto²,

Hatakeyama³

2015

MSCE

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Plasma-assisted chemical vapor deposition (PCVD) was applied for amorphous TiOx deposition on Pyrex-glass substrate at low temperature below 90˚C to control orientation of anatase-TiO2 layer by low pressure chemical vapor deposition (LPCVD) using TTIP-single precursor. Preferentially <112>-oriented anatase-TiO2 layer was successfully deposited with the orientation ratio as high as 68% on the initial layer of the thickness around 70 nm. Contact angle water was quickly decreased by UV-irradiation on the highly <112>-oriented TiO2 layer comparing with the layer directly deposited on glass, whereas surface roughness on the former was significantly reduced in comparison to that on the latter. Methyleneblue (MB) aqueous solution with the concentration of 2 mmol/L was used to evaluate photocatalytic property on the layer. Rate constant of MB-decomposition via first order kinetics increased with the orientation ratio above 60% was resulted in 2.3 × 10 −1 min −1 for the layer with <112>-orientation ratio of 68%, whereas the constant was 2.8 × 10 −3 min −1 for the layer directly deposited on glass.

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Microstructure of nanosized TiO2 obtained by sol-gel synthesis

Cited by 97 publications

References 17 publications

The mechanochemical stability of hydrogen titanate nanostructures

The mechanochemical stability of hydrogen titanate nanostructures

The complete Raman spectrum of nanometric SnO2 particles

Enhanced Photo-Induced Property of LPCVD-TiO<SUB>2</SUB> Layer on PCVD-TiO<SUB>x</SUB> Initial Layer

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Microstructure of nanosized TiO2 obtained by sol-gel synthesis

Cited by 97 publications

References 17 publications

The mechanochemical stability of hydrogen titanate nanostructures

The mechanochemical stability of hydrogen titanate nanostructures

The complete Raman spectrum of nanometric SnO2 particles

Enhanced Photo-Induced Property of LPCVD-TiO&lt;SUB&gt;2&lt;/SUB&gt; Layer on PCVD-TiO&lt;SUB&gt;x&lt;/SUB&gt; Initial Layer

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Enhanced Photo-Induced Property of LPCVD-TiO<SUB>2</SUB> Layer on PCVD-TiO<SUB>x</SUB> Initial Layer