To design a high-performance photocatalytic system with TiO2, it is necessary to reduce the bandgap and enhance the absorption efficiency. The reduction of the bandgap to the visible range was investigated with reference to the surface distortion of anatase TiO2 nanoparticles induced by varying Fe doping concentrations. Fe-doped TiO2 nanoparticles (Fe@TiO2) were synthesized by a hydrothermal me...

The present work shows a detailed study of the effects of preheating in ESR signals of four alkaline feldspar samples. ESR results showed Fe 3+ , Al-O — Al, Ti 3+ and [Pb-Pb] 3+ centers, When the samples were gamma-irradiated, the concentration of the Fe centers deceased in all the samples, but the Al-O –Al center concentration increased after about 50 Gy while that of the Ti 3+ and [Pb-Pb] 3+ ...

We report the first survey of chemical abundances in M and K dwarf stars using atomic absorption lines in high resolution spectra. We have measured Fe and Ti abundances in 35 M and K dwarf stars using equivalent widths measured from λ/∆λ ≈ 33 000 spectra. Our analysis takes advantage of recent improvements in model atmospheres of low-temperature dwarf stars. The stars have temperatures between ...

Titanium (Ti) is a relatively abundant element that has found growing applications in medical science and recently some of Ti compounds are introduced as anticancer drugs. In spite of very limited data which exist on the Ti metabolism, some proteins might be involved in the mechanism of action of Ti. Up to our knowledge, there is not any report in the literature concerning binding of Ti to apol...

The Al–Fe–Ti system has been assessed and the limiting binary systems are shortly reviewed. Based on a thorough review of the literature, isotherms at 800, 900, and 1000 °C have been re-evaluated and a provisional isotherm at 1200 °C is presented for the first time. The effect of alloying the binary phases with the third component is reviewed with regard to the ternary homogeneity ranges, cryst...

Compositional fields for spinels from a wide variety of mafic– a wide range of conditions from mafic and ultramafic ultramafic igneous rock types and tectonic environments have been magmas and, in the case of chromites, are often among determined from a global database of over 26 000 analyses. the first phases to crystallize. They also exhibit a wide These fields are defined using contoured dat...

Introduction: In order to unravel the thermal history of the Martian meteorites Nakhla and Y000593 we applied several geo-thermometers including single and two pyroxene thermometry, the Fe, Ti-thermometer / oxybarometer and TEM microstructures. Application of the Fe,Ti-thermometer/oxyba-rometer: The presence of Fe,Ti-oxide phases enable the application of the Fe,Ti-thermometer /oxybaro-meter [1...