Synthesis and electronic structure of low-density monoliths of nanoporous nanocrystalline anatase TiO2

Kucheyev, S. O.; Baumann, Theodore F.; Wang, Y.M.; Buuren, T. van; Satcher, Joe H.

doi:10.1016/j.elspec.2005.01.157

Cited by 18 publications

(17 citation statements)

References 13 publications

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“…4a Ti upper spectrum, 700 °C) prominent peaks which are related to the crystal field splitting of Ti 4+ in an octahedral symmetry. The first two peaks (at 458 EV and 460 eV) belong to the 2p 3/2 (t 2g and e g ) and the third and fourth peak (464.35 eV and 466.7 eV) belong to the 2p 1/2 (t 2g and e g )transitions [49][50][51][52][53]. In addition, the TEY`s and TFY`s are rather similar for all annealing temperatures which indicates equivalent bulk and surface properties.…”

Section: Titanium Ti L 23 Absorption and Emission Spectramentioning

confidence: 84%

“…7 (a) a of the low temperature sample (#350 °C, lower spectrum) is the only one which shows similarities to rutile polymorph TiO 2 [53]. The bulk sensitive TFY exhibited considerable deviations.…”

Section: Oxygen K Absorption and O K Emission Spectramentioning

confidence: 99%

“…This particular feature corresponds to a Ti 4+ ion in the rutile type structure (D 2h ) with a slight distortion from the O h symmetry. Ti in the anatase phase shows an opposite intensity distribution (peak A larger than peak B) [52,53,54]. Because anatase is typically the low temperature phase one would first expect an anatase structure for the #350 °C sample.…”

Section: Titanium Ti L 23 Absorption and Emission Spectramentioning

confidence: 99%

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Investigation of the amorphous to crystalline phase transition of chemical solution deposited Pb(Zr0.3Ti0.7)O3 thin films by soft X-ray absorption and soft X-ray emission spectroscopy

Schneller

Kohlstedt

Petraru

et al. 2008

J Sol-Gel Sci Technol

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Abstract:Chemical solution deposited (CSD) complex oxide thin films attract considerable interest in various emerging fields as for example, fuel cells, ferroelectric random access memories or coated conductors. In the present paper the results of soft-x-ray spectroscopy between 100 eV and 500 eV on the amorphous to crystalline phase transition of ferroelectric PbZr 0.3 Ti 0.7 O 3 (PZT) thin films are presented. Five CSD samples derived from the same wafer coated with a PZT film pyrolyzed at 350 °C were heat treated at different temperatures between 400 °C and 700 °C. At first the sample were morphologically and electrically characterized. Subsequently the soft-x-ray absorption and emission experiments were performed at the undulator beamline 8.0 of the Advanced Light Source of the Lawrence Berkeley National Laboratory. Soft-x-ray absorption spectra were acquired for the Ti L 2,3 -, O K-, and C K-edge thresholds by using simultaneously the total electron yield (TEY) and total fluorescence yield (TFY) detection methods. For two samples, annealed at 400 °C and 700 °C, respectively, the resonant inelastic soft-x-ray 2 spectroscopy (RIXS) was applied for various excitation energies near the Ti L-, O K-edges. We observed clear evidence of a rutile phase at untypically low temperatures. This rutile phase transforms into the perovskite phase upon increasing annealing temperature. These results are discussed in the framework of current microscopic models of the PZT (111) texture selection.

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Section: Titanium Ti L 23 Absorption and Emission Spectramentioning

confidence: 84%

Section: Oxygen K Absorption and O K Emission Spectramentioning

confidence: 99%

Section: Titanium Ti L 23 Absorption and Emission Spectramentioning

confidence: 99%

See 1 more Smart Citation

Investigation of the amorphous to crystalline phase transition of chemical solution deposited Pb(Zr0.3Ti0.7)O3 thin films by soft X-ray absorption and soft X-ray emission spectroscopy

Schneller

Kohlstedt

Petraru

et al. 2008

J Sol-Gel Sci Technol

View full text Add to dashboard Cite

show abstract

“…And only several reports about synthesis of monolithic TiO 2 through sol-gel method have been presented [26,29]. It is because that the high reactivity of titanium alkoxides makes it hard to control structure development during hydrolysis and condensation [25].…”

Section: Introductionmentioning

confidence: 99%

“…However, generally substrate would decrease the mass transfer efficiency, therefore free-standing porous TiO 2 with shapes in large length scale is a favorable alternative. The synthesis of porous monolithic TiO 2 [25,26] has been reported and attracted increasing attention. The monolithic shape makes it easy to separate and recover TiO 2 during application and the porous structure could facilitate the mass transfer during reaction.…”

Section: Introductionmentioning

confidence: 99%