Hydrothermal Strontium Titanate Films on Titanium: An XPS and AES Depth‐Profiling Study

Pilleux, M.E.; Grahmann, Carlos R.; Fuenzalida, V.M.

doi:10.1111/j.1151-2916.1994.tb09763.x

Cited by 50 publications

(15 citation statements)

References 35 publications

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“…5(d)), which is agreement with that in Ref. 19). The results obtained from XPS analyses confirm that the valences of Ba, Sr, Ti and O elements of Ba 0:5 Sr 0:5 TiO 3 thin films are þ2, þ2, þ4 and À2 respectively.…”

Section: Sem and Afm Analyses Of The As-grown Filmssupporting

confidence: 82%

Hydrothermal Syntheses of Barium Strontium Titanate Thin Films

Gao

Xiao

et al. 2003

Mater. Trans.

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Crystallized polycrystalline barium strontium titanate (Ba 0:5 Sr 0:5 TiO 3 ) thin films have been synthesized on the titanium metal substrates by an environmentally conscious method of hydrothermal synthesis. The films were characterized by X-ray diffraction (XRD), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and scanning electronic micrographs (SEM) respectively. The XRD analyses show that the as-grown films are a cubic phase containing a little unidentified phase, which would tend to be a pure cubic phase after being annealed at 600 C for 30 minutes; the XPS analyses reveal that the composition of the as grown Ba 0:5 Sr 0:5 TiO 3 films is agreement with the stoichiometry, and the valences of Ba, Sr, Ti, and O elements of the films are þ2, þ2, þ4, and À2 respectively; the SEM photographs show that the films are condensely synthesized; and the AFM analyses show that the average surface roughness and the root-mean-square (rms) of the film measured are 0.257 mm and 0.323 mm respectively. It is concluded that an environmentally conscious method of hydrothermal synthesis can be used for preparing multi-element oxide thin films.

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Section: Sem and Afm Analyses Of The As-grown Filmssupporting

confidence: 82%

Hydrothermal Syntheses of Barium Strontium Titanate Thin Films

Gao

Xiao

et al. 2003

Mater. Trans.

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“…As discussed previously, the samples may contain titanates. By considering this, the peak located at 529.15 eV may be attributed to titanate oxygen as well [62] (a clear deconvolution cannot be carried out as the two species are very close in terms of binding energy), a further evidence in favor of titanates.…”

Section: The Surface Quality Of the Chosen Catalysts -X-ray Photoelecmentioning

confidence: 99%

Associating low crystallinity with peroxo groups for enhanced visible light active photocatalysts

et al. 2018

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A B S T R A C TIn the present study hydrogen peroxide was applied during the synthesis of titanium dioxide (TiO 2 ) photocatalysts to anchor peroxo groups onto the surface to enhance visible light excitability. The effect of changes in the pH value and crystallization temperature was investigated. As-prepared peroxo-titania were characterized by X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), infrared spectroscopy (IR), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity was investigated using phenol as model contaminant under visible light irradiation. IR and XPS measurements confirmed the presence of peroxo groups in the samples, moreover Raman and XPS measurements showed the formation of amorphous sodium titanate. Photocatalytic activity measurements pointed out, that most efficient as-prepared photocatalyst exceeded the photocatalytic performance of all reference materials. The cause of the enhanced photocatalytic activity was attributed to the enhanced visible light excitability and considerable amount of peroxo groups, which were not stable after the reusability experiments of the photocatalysts, suffering a redox reaction with the relatively high amount of Ti 3+ , resulting Ti 4+ and surface OH groups. Therefore, the loss of peroxo groups and concomitantly photocatalytic activity was observed. (Z. Pap).Catalysis Today xxx (xxxx) xxx-xxx 0920-5861/

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“…27 The binding peak positions of Mn 2p 3/2 and Ti 2p 3/2 are in the range of 639.5-642.5 eV and 456.6-457.8 eV, respectively, which is consistent with previous studies. [28][29][30][31][32] From Table 4 we can get the following information: (a) The trivalent manganese ions and titanium ions showed an increasing trend with the increase of LCM content. (b) At the sintering temperature of 1250°C, the content of manganese ions in different valence states changes with the content of LCM.…”

Section: Resultsmentioning

confidence: 99%

Correlation between B value deviation and sintering temperature of perovskite solid solution materials

et al. 2019

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The effects of different sintering temperatures on the system of Ba0.5Sr0.5TiO3–La0.8Ca0.2MnO3 (BST‐LCM) material were investigated by means of scanning electron microscopy, X‐ray, resistance‐temperature measurements, and X‐ray photoelectron spectroscopy. X‐ray diffraction and X‐ray photoelectron spectroscopy confirm that BST‐LCM is completely miscible and BST is the main phase, which under the premise of following the theory of small polaron conduction, titanium ions interact with manganese ions, which affects the electrical properties of the system of BST‐LCM material. For the electrical properties of related, the LCM content is inversely proportional to the activation energy. Through the linear fitting of the experimental data, the empirical formula between the sintering temperature B value and the content of solid solution is obtained, and the approximate B value within a certain range can be preliminarily calculated.

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Hydrothermal Strontium Titanate Films on Titanium: An XPS and AES Depth‐Profiling Study

Cited by 50 publications

References 35 publications

Hydrothermal Syntheses of Barium Strontium Titanate Thin Films

Hydrothermal Syntheses of Barium Strontium Titanate Thin Films

Associating low crystallinity with peroxo groups for enhanced visible light active photocatalysts

Correlation between B value deviation and sintering temperature of perovskite solid solution materials

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