Ti 2p and O 1s core levels and chemical bonding in titanium-bearing oxides

Atuchin, Victor V.; Kesler, V. G.; Pervukhina, N. V.; Zhang, Zhaoming

doi:10.1016/j.elspec.2006.02.004

Cited by 294 publications

(155 citation statements)

References 78 publications

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“…50 should be taken into account to draw a thorough picture of this advanced material. The spectrum of Ti 2p core level indicates that titanium is always full oxidized as confirmed by the constant position of the peak maximum at 458.8 eV, which is typical of octahedrally 55 coordinated Ti 4+ ions 54 . However, it can be noted that the full width at half maximum of the Ti 2p 3/2 peak for the composite is much higher than the reference TiO 2 powder.…”

mentioning

confidence: 80%

The interaction of oxygen with the surface of CeO₂–TiO₂ mixed systems: an example of fully reversible surface-to-molecule electron transfer

Gionco

Giamello

Mino

et al. 2014

Phys. Chem. Chem. Phys.

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Mixed CeO 2 -TiO 2 systems have been synthesized using the sol-gel technique in a symmetric range of 5 nominal compositions (0.1, 0.5, 0.9 CeO 2 molar fraction respectively). The solid materials have been characterised using a variety of diffractometric and spectroscopic techniques. The intimate contact between the two components during the synthesis leads to heterogeneous systems which are based on the presence, beside the two individual oxide phases, of a mixed phase of a cerium titanate (Ce 2 Ti 2 O 7 , pyrochlore structure) which contains Ce 3+ ions imparting particular optical properties to the solid 10 (pronounced red shift with respect to the band gap transition of the two oxides). Ce 3+ ions are present at the surface of the systems together with tetravalent Ce and Ti ions. The mixed solids can be reduced by annealing under vacuum and, upon reoxidation in mild conditions with O 2 , form superoxide species adsorbed on Ce 4+ which have, as already reported for low loading CeO 2 -TiO 2 systems, peculiar spectroscopic properties with respect to superoxide adsorbed on bare cerium dioxide.

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mentioning

confidence: 80%

The interaction of oxygen with the surface of CeO₂–TiO₂ mixed systems: an example of fully reversible surface-to-molecule electron transfer

Gionco

Giamello

Mino

et al. 2014

Phys. Chem. Chem. Phys.

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“…On the other hand, the oxygen content is always somewhat more than the nominal value (even with the assumption of Mo being completely in the 6+ oxidation state), suggesting the presence of excess surface oxygen species. Indeed, although the most intense contribution to the O 1s line occurs at a binding energy characteristic for TiO 2 -related materials [31], the line shape is asymmetric towards higher binding energies, which can be related to the occurrence of surface hydroxyl groups and adsorbed water (spectra not shown). The carbon content of the samples is predominantly in the graphitic form; both EDX and XPS analysis indicate more carbon than the nominal value.…”

Section: X-ray Photoelectron Spectroscopy (Xps) Examinationmentioning

confidence: 99%

Effect of Mo incorporation on the electrocatalytic performance of Ti–Mo mixed oxide–carbon composite supported Pt electrocatalysts

Vass

Borbáth

Pászti

et al. 2017

Reac Kinet Mech Cat

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“…The subpeak at 529.0 eV is assigned to O atoms bound to Ti of TiO 2 (O-Ti 4+ ), and the subpeak at 526.38 eV is attributed to O atoms of wool fibres bound to Ti of TiO 2 (O-Ti 3+ ). 26 With respect to the S 2p XPS spectra of the untreated fibres, the subpeaks at 163.42 eV (S-S) and 164.67 eV (S-H) are shifted to 163.01 eV and 165.79 eV, respectively. Moreover, a shoulder at lower binding energy of 157.88 eV is observed, and this has been assigned to a new formed by S atoms of wool fibres bound to Ti of TiO 2 (S-Ti 3+ ).…”

Section: Xps Analysismentioning

confidence: 99%

Functional Modification with TiO₂ Nanoparticles and Simultaneously Dyeing of Wool Fibers in a One-Pot Hydrothermal Process

Zhang

Yan

Mao

2014

Ind. Eng. Chem. Res.

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ABSTRACT:Wool fibres are treated with titanate tetrabutyl in the presence of C. I. Reactive Blue 69 dye in one-pot process under hydrothermal conditions. The structural changes of wool fibres before and after treatments as well as the remaining particles are characterized by small-spot Micro X-ray fluorescence (µ-XRF), field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), thermal gravimetric analysis (TGA), and differential scanning calorimetry (DSC) techniques. The properties of percentage of exhaustion, K/S value, colour fastness to light, tension, photocatalytic activity, and diffuse reflectance spectrum (DRS) are also investigated. The experimental results indicate that after treatment with titanate tetrabutyl and C. I. Reactive Blue 69, wool fibres are evenly immobilized with a thin layer of anatase phase TiO 2 nanoparticles with an average grain size of less than 10 nm. The TiO 2 nanocrystals are synthesized and simultaneously grafted onto wool fibres via the C-Ti 4+ , S-Ti 4+ (Ti 2+ ), and N-Ti 4+ bonds. The thermal stability of wool fibres changes a little. The capability of wool fibres to protect against ultraviolet radiation is improved. The tensile properties decrease to some degree. The photocatalytic activity to decolourize methylene blue dye is endowed. A high degree of percentage of exhaustion and K/S value are obtained by adding a certain amount of acetic acid in the precursor solution, which can well be matched with the custom dip dyeing technique.

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Ti 2p and O 1s core levels and chemical bonding in titanium-bearing oxides

Cited by 294 publications

References 78 publications

The interaction of oxygen with the surface of CeO₂–TiO₂ mixed systems: an example of fully reversible surface-to-molecule electron transfer

The interaction of oxygen with the surface of CeO₂–TiO₂ mixed systems: an example of fully reversible surface-to-molecule electron transfer

Effect of Mo incorporation on the electrocatalytic performance of Ti–Mo mixed oxide–carbon composite supported Pt electrocatalysts

Functional Modification with TiO₂ Nanoparticles and Simultaneously Dyeing of Wool Fibers in a One-Pot Hydrothermal Process

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Ti 2p and O 1s core levels and chemical bonding in titanium-bearing oxides

Cited by 294 publications

References 78 publications

The interaction of oxygen with the surface of CeO2–TiO2 mixed systems: an example of fully reversible surface-to-molecule electron transfer

The interaction of oxygen with the surface of CeO2–TiO2 mixed systems: an example of fully reversible surface-to-molecule electron transfer

Effect of Mo incorporation on the electrocatalytic performance of Ti–Mo mixed oxide–carbon composite supported Pt electrocatalysts

Functional Modification with TiO2 Nanoparticles and Simultaneously Dyeing of Wool Fibers in a One-Pot Hydrothermal Process

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The interaction of oxygen with the surface of CeO₂–TiO₂ mixed systems: an example of fully reversible surface-to-molecule electron transfer

The interaction of oxygen with the surface of CeO₂–TiO₂ mixed systems: an example of fully reversible surface-to-molecule electron transfer

Functional Modification with TiO₂ Nanoparticles and Simultaneously Dyeing of Wool Fibers in a One-Pot Hydrothermal Process