Co-doped TiO2 nanoparticles were synthesized via non hydrous complex-polymer sol-gel method. A series of Co(x):Ti1-x O2 samples with x = 0.01, 0.03, 0.05, 0.08 and 0.10, were prepared and subsequently annealed at 400 degrees, 600 degrees and 800 degrees C. Structural and magnetic properties of Co(x):Ti1-x O2 have been studied by means of X-ray diffraction and DC magnetometry. All samples anneal...

Ilmenite-type crystals find a variety of technological applications due to their intriguing physical properties. We present the results lattice dynamics studies honeycomb antiferromagnetic ilmenite CoTiO3 single crystal by complementary polarized infrared, Raman, and dielectric spectroscopic techniques that are supplemented DFT calculations. The symmetries frequencies all predicted infrared- Ra...

In recent years, Pillared InterLayered Clays (PILCs) have been widely used in several applications; in particular in adsorption and catalysis. The research interest in this family of solids has increased considerably. Clay minerals provide distinct nanometer-scaled layers and interlayers for engineering them as active catalysts. As such, strategic design and preparation has led to a variety of ...

Prediction of the ceramic pigment's color using theoretical calculations is a new and significant topic. In this work, CoTiO3 Co2TiO4 pigments were synthesized. We modeled these structures performed within DFT+U approach. studied structural, electronic, optical, colorimetric properties structures. used many-body Fxc kernel for long-range correction (LRC) model Bethe–Salpeter equation (BSE) meth...

The mechanical properties of non-vulcanized natural rubber and dialyzed natural rubber-clay nanocomposites have been studied by uniaxial deformations to evaluate the reinforcement efficiency of the clay. We show that while non-rubber molecules contribute to auto-reinforcement, removal of these molecules improves significantly the performance of clay as reinforcement agent. These mechanical prop...

[1] To understand the aqueous history of Mars, it is critical to constrain the alteration mineralogy of the Martian surface. Previously published analyses of thermal infrared (l = 6–25 mm) remote sensing data of Mars suggest that dark regions have 15–20% clay minerals. However, near-infrared (l = 1–3 mm) spectral results generally do not identify widespread clay minerals. Thermal infrared detec...