Raman study of barium titanate with oxygen vacancies

Zhang, W.H.; Chen, L.; Yu, Tiantang; Chen, J.; Zhang, J.X.

doi:10.1016/j.physb.2011.09.046

Cited by 65 publications

(30 citation statements)

References 19 publications

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“…The cubic structure belongs to space group Pm3m which does not present firstorder Raman-active modes and, consequently, their spectra do not show any band. However, the tetragonal structure belongs to space group P4mm and it presents bands at, approximately, 180 cm -1 , 265 cm -1 , 305 cm -1 , 520 cm -1 and 720 cm -1 corresponding to irreducible representations (A1(LO)), (A1(TO)), (B1), (A1, E(TO)) and (A1, E(LO), respectively [47,49]. The band located at 305 cm -1 is the most often used to differentiate between the cubic and tetragonal structure by Raman spectroscopy because this peak disappears when the tetragonal structure is not the main one.…”

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confidence: 99%

BaTi1−xCuxO3 perovskites: The effect of copper content in the properties and in the NOx storage capacity

Albaladejo-Fuentes

López-Suárez

Sánchez-Adsuar

et al. 2014

Applied Catalysis A: General

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Please cite this article as: V. Albaladejo-Fuentes, F.E. López-Suárez, M.S. Sánchez-Adsuar, M.J. Illán-Gómez, −x Cu x O 3 perovskites: the effect of copper content in the properties and in the NOx storage capacity., Applied Catalysis A, General (2014), http://dx.doi.org/10.1016/j.apcata. 2014.09.032 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. XRD and Raman spectroscopy results indicate that all the copper containing catalysts present a distortion of the original tetragonal structure due to the incorporation of copper into the lattice.The XPS and H 2 -TPR results reveal that the copper catalysts, except for BaTiCu0.5 catalyst, present two copper species (with different electronic interaction with the perovskite) and active surface oxygen species. Additionally, it seems that the fraction of copper with a strong electronic interaction with the perovskite or incorporated into the perovskite structure increases with the copper content.The active sites created on the BaTi 1-x Cu x O 3 perovskite surface bring to the catalysts activity for the NO to NO 2 oxidation and for the NOx adsorption. The NOx storage capacity increases with the copper content and reaches a limit for the BaTiCu2 catalyst (300 µmol/g, at 420ºC) which is within the range of the values reported for the noble metal-based catalysts.

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confidence: 99%

BaTi1−xCuxO3 perovskites: The effect of copper content in the properties and in the NOx storage capacity

Albaladejo-Fuentes

López-Suárez

Sánchez-Adsuar

et al. 2014

Applied Catalysis A: General

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“…It confirms the tetragonal phase of pure BT. The band at 719 cm -1 is assigned to the A1+E(LO) mode [14]. [15] all these peaks are characteristic of the hexagonal phase.…”

Section: Resultsmentioning

confidence: 96%

Dielectric Anomalies of BaTi1-xFexO3 Ceramics for x = 0.0 to 0.6 of Fe Doping Concentration

Gouitaa¹,

Lamcharfi²,

Bouayad³

et al. 2017

Asian J. Chem.

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“…On the other hand, for the peak at approximately 720 cm -1 , the Bi 12 TiO 20 and BaTiO 3 peaks overlapped completely, and separation of the individual material peaks was difficult. As shown in Figure 3, the Raman peaks of the samples can be divided into three groups: the Bi 12 TiO 20 -related peaks labeled p1-p10 [19,20], the BaTiO 3 -related peaks labeled p11-p14 [21] and the Fig. 4(a)).…”

Section: Resultsmentioning

confidence: 99%

Amorphous phases and composition dependence of piezoelectricity in BaTiO 3 –Bi 2 O 3 polar amorphous ceramics

Zhao

Wang

et al. 2016

Ceramics International

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Raman study of barium titanate with oxygen vacancies

Cited by 65 publications

References 19 publications

BaTi1−xCuxO3 perovskites: The effect of copper content in the properties and in the NOx storage capacity

BaTi1−xCuxO3 perovskites: The effect of copper content in the properties and in the NOx storage capacity

Dielectric Anomalies of BaTi1-xFexO3 Ceramics for x = 0.0 to 0.6 of Fe Doping Concentration

Amorphous phases and composition dependence of piezoelectricity in BaTiO 3 –Bi 2 O 3 polar amorphous ceramics

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