نتایج جستجو برای: rutile

تعداد نتایج: 2508  

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2010
wang liyong han yuanyuan ding shiwen

ticl4, ammonia, inorganic salts as raw material, nanometer composite-crystal tio2 powders were synthesized by two-step chemical method. precursors were crystallized with different phase and stable composite-crystal tio2 with anatase and rutile phase was prepared at low temperature. quantitative control of crystal phase was realized. remarkable factors including reaction ph value, reaction time,...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2008
Michael L Machesky Milan Predota David J Wesolowski Lukas Vlcek Peter T Cummings Jörgen Rosenqvist Moira K Ridley James D Kubicki Andrei V Bandura Nitin Kumar Jorge O Sofo

The detailed solvation structure at the (110) surface of rutile (alpha-TiO2) in contact with bulk liquid water has been obtained primarily from experimentally verified classical molecular dynamics (CMD) simulations of the ab initio-optimized surface in contact with SPC/E water. The results are used to explicitly quantify H-bonding interactions, which are then used within the refined MUSIC model...

Journal: :iranian journal of pharmaceutical sciences 0
sedigheh joughehdoust islamic azad university, science and research branch, biomedical engineering faculty and young research club, tehran, iran aliasghar behnamghader material and energy research center, tehran, iran abdollah afshar department of material science and engineering, sharif university of technology, tehran, iran

in this investigation, fluor-hydroxyapatite (fha) film was deposited on a titanium substrate by sol-gel method. triethyl phosphite, ammonium fluoride and calcium nitrate in ethanol solutions were used respectively as p, f and ca precursors. typical apatite structures were obtained for all coatings after dipping and subsequent heat treatment at 550, 700 and 800 ºc, the coating layers were invest...

2003
E. J. ESSENE S. B. MUKASA

The prograde metamorphism of eclogites is typically obscured by chemical equilibration at peak conditions and by partial requilibration during retrograde metamorphism. Eclogites from the Eastern Blue Ridge of North Carolina retain evidence of their prograde path in the form of inclusions preserved in garnet. These eclogites, from the vicinity of Bakersville, North Carolina, USA are primarily co...

بدیعیان باغ‌سیاهی, فاطمه , موسوی, ملیحه , یگانه, محبوبه ,

Extension of the optical response with the high efficiency in visible region of the solar light spectrum is one of the research goals of the photocatalysts based on TiO2. In this work, Cr doped TiO2 was synthesized by sol-gel method at different annealing temperature of 400, 600 and 800 oC in order to increase the optical absorption of TiO2. Upon increasing the annealing temperature, the anatas...

Journal: :Scientific reports 2016
Shoyebmohamad F Shaikh Rajaram S Mane Byoung Koun Min Yun Jeong Hwang Oh-shim Joo

Using a simple hydrothermal synthesis, the crystal structure of TiO2 nanoparticles was controlled from rutile to anatase using a sugar alcohol, D-sorbitol. Adding small amounts of D-sorbitol to an aqueous TiCl4 solution resulted in changes in the crystal phase, particle size, and surface area by affecting the hydrolysis rate of TiCl4. These changes led to improvements of the solar-to-electrical...

2016
Hung-Bin Lee Hsueh-Chuan Hsu Shih-Ching Wu Shih-Kuang Hsu Peng-Hsiang Wang Wen-Fu Ho

We propose a simple and low-cost process for the preparation of porous Ti foams through a sponge replication method using single-step air sintering at various temperatures. In this study, the apatite-forming ability of air-sintered Ti samples after 21 days of immersion in simulated body fluid (SBF) was investigated. The microstructures of the prepared Ca-P deposits were examined by X-ray diffra...

2016
Adolfo A. Mosquera Jose M. Albella Violeta Navarro Debabrata Bhattacharyya Jose L. Endrino

The effect of silver on the phase transition and microstructure of titanium oxide films grown by pulsed cathodic arc had been investigated by XRD, SEM and Raman spectroscopy. Following successive thermal annealing up to 1000 °C, microstructural analysis of annealed Ag-TiO2 films reveals that the incorporation of Ag nanoparticles strongly affects the transition temperature from the initial metas...

Journal: :The journal of physical chemistry. B 2005
Pavan K Naicker Peter T Cummings Hengzhong Zhang Jillian F Banfield

Molecular dynamics simulations of titanium dioxide nanoparticles in the three commonly occurring phases (anatase, brookite, and rutile) are reported. The structural properties inferred by simulated X-ray diffraction patterns of the nanoparticles were investigated. The titanium-oxygen bond length as a function of size, phase, and temperature was determined and was found to be dependent on the co...

2012
Zhensheng Hong Mingdeng Wei Tongbin Lan Guozhong Cao

ont matter & 2012 n.2012.02.009 thors. : wei-mingdeng@f .edu (G. Cao). Abstract Wulff-shaped and nanorod-like nanoporous mesocrystals constructed from ultrathin rutile TiO2 nanowires were successfully fabricated for the first time in the presence of the surfactant sodium dodecyl benzene sulfonate (SDBS). SDBS played a key role in the homoepitaxial selfassembly process, in which titanate nanowir...

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