A method is provided for enhancing the crystallization rate of certain polyetherimide to provide an improved molding mehod for making solvent resistant shaped thermoplastics. Polyetherimide blends containing crystallization rate enhancing agents such as bisimides or imide oligomers also are provided.
Dielectric constant of liquids, gases and solids (Table) In the table are given the values of the dielectric constant of some solids, liquids and gases for constant electric fields or for small frequencies, when the wavelength is infinitely large. Gases are assumed to be at atmospheric pressure; the temperature, including the values of ε ...
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High purity (>99.9%) Rutile TiO 2 single crystal substrates with epi-ready surface polish are widely used as substrate materials for thin film growth and depositions. Rutile phase Titanium Oxide (TiO 2) single crystal is one of the most commonly used materials for optical isolators and special prisms.This is because Rutile TiO 2 has a large birefringence with a high refractive index.
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The significant enhancement of photoelectrochemical performance can be ascribed to the rational coupling of morphological and electronic features of the self-doped TiO 2 NTPCs: (1) the periodically morphological structure of the photonic crystal layer traps broadband visible light, (2) the electronic interband state induced from self-doping of ...
The effect of Co loading on crystal structure of TiO 2 support was studied using XRD. FIG. 4A shows the X-Ray diffraction patterns of TiO 2 photocatalyst with different loadings of Co (in wt. %). The XRD patterns clearly show the characteristic planes of anatase phase at …
A prototype Au–Pd/TiO 2 catalyst was prepared, characterized and tested for the photoreaction of ethanol. XPS Au4f and Pd3d indicated that the as-prepared material is composed of metallic Au, metallic Pd as well oxidized Pd (Pd 2+).Ar ion sputtering (5 min) of the catalyst surface resulted in almost total reduction of Pd 2+ to metallic Pd in addition to considerable reduction of …
TiO 2 and TiO 2-based materials are prototypes for photo-catalytic reactions as they have been shown for many decades to be active for total oxidation of hydrocarbons to clean the environment. In the last decade or so there has been a shift in the objectives for photoreactions mainly towards hydrogen production from renewables. Here we review the fundamentals behind the reactivity of model TiO ...
The choice of TiO 2 crystal phase (i. e., anatase, rutile, or brookite) greatly influences catalyst performance in the gas-phase ketonization of small volatile fatty acids, such as acetic acid and propionic acid. Rutile TiO 2 was found to perform best, combining superior activity, as exemplified by an exceptional reaction rate of 141.8 mmol h −1 g −1 (at 425 °C and 24 h −1) with ...
Polystyrene PS125 was supplied by Sabic Company, Saudi Arabia ; it is produced from styrene monomer by continuous mass polymerization. It is a crystal-like, brittle and hard polymer with high clearness and medium flow. It also has medium viscosity and heat deflection temperatures and makes it suitable for various applications.
TiO 2 were formed by photolithography, e-beam evaporation of 5 nm Ti/160 nm Au, and lift-off. Metallic Ti overlayers deposited on TiO 2 (both bulk crystal and thin film) have been shown to produce a region of interfacial suboxide, TiO x (x < 2). This interfacial layer is …
SABIC® PS 125 is a crystal-like, hard and brittle general purpose polystyrene grade. It is manufactured by continuous mass polymerization of styrene monomer. Possesses medium flow and shows high clarity. It also has medium vicat and heat deflection temperatures and makes it suitable for various applications.
XRD demonstrated that TiO 2 NPs holds of anatase crystal phase with crystallizing size 14–19 nm even after heating at 600 °C. TGA, SEM, and TEM images reveal urea's role, which controls the size, morphology, and aggregation of TiO 2 NPs during the thermal decomposition.
†Fundamental Catalysis, SABIC-CRD at KAUST, Thuwal, Kingdom of Saudi Arabia * Email: [email protected] (K. K) and [email protected] (H. I) Raman Spectroscopy: Raman spectra of the single crystals were obtained using a Thermo Scientific TM DXR TM Raman equipment. All four TiO 2 single crystals were analyzed from 50 to 3400 cm-1 with multiple ...
LNP STAT-KON 9X08403C is a compound based on Liquid Crystal Polymer (LCP) resin containing Carbon Fiber. Added features of this material are: Clean Compounding System, High Temperature, Flame Retardant, Electrically Conductive, Good barrier against water and oxygen. Information provided by SABIC Innovative Plastics for the Americas.
Hydrogen production by Tuning the Photonic Band Gap with the Electronic Band Gap of TiO 2 G.I.N.Waterhouse 1,A.K.Wahab3,M.Al-Oufi3,V.Jovic1,D.H.Anjum4,D.Sun-Waterhouse,J.Llorca2 & H. Idriss3 1School of Chemical Sciences, University of Auckland, New Zealand, 2Institute of Energy Technologies and Centre for Research in NanoEngineering, Technical University of Catalonia, …
Previous work in our laboratory indicated that carbonyl metathesis of aldehydes can be accomplished as a gas-solid reaction on a reduced TiO 2 (001) single crystal under ultrahigh vacuum (UHV). This reaction requires the presence of cations in lower oxidation states on the surface, but does not require Ti 0 as suggested by previous studies in the liquid phase.
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This study systematically re-examines the titania-catalysed photo-oxidation of methylene blue () in aqueous solution at 20 °C, placing particular emphasis on the effects of TiO 2 crystallite size, TiO 2 polymorph (anatase, brookite, rutile and combinations thereof) and experimental test conditions on the rate of photo-oxidation. For all TiO 2 samples tested, the highest rate of photo ...
12%Wang Y, Zhu Y, Yang X, et al. Plasmonic Au decorated single-crystal-like TiO 2-NaYF 4 mesoporous microspheres for enhanced broadband photocatalysis. Chin J Chem, 2017, 35: 949–956. CAS Google Scholar 28. Pan J, Liu G, Lu GQM, et al. On the true photoreactivity order of {001}, {010}, and {101} facets of anatase TiO 2 crystals. Angew Chem Int ...
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Different types of OH are generated depending on the crystal phase of TiO 2.. TMA is a good probe for monitoring the origin and fate of free OH.. The OH f is generated on anatase through a reductive conversion of dissolved O 2.. 18 O-labelled test provides an evidence for the reductive production path of OH f.
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The present invention relates to a photocatalyst for the generation of diatomic hydrogen from a hydrogen containing precursor under the influence of actinic radiation comprising semiconductor support particles comprised of SrTiO 3 and TiO 2 with one or more noble and/or transition metals deposited thereon. Further disclosed is a method for preparing such catalyst and a method for generating ...
Urea is a widespread and affordable additive widely produced in the agricultural industries. However, additives like urea can influence and control the growth of TiO 2 crystals. Under thermal process, it transforms into graphitic carbon nitride (g-C 3 N 4) followed …
Titanium dioxide (TiO 2) is one of the most important pigments. It is widely used because it efficiently scatters visible and absorbs UV light, thereby imparting whiteness, brightness, and opacity when incorporated into a plastic. Titanium dioxide is commercially available in two crystal structures—anatase and rutile.
Xydar® LCP (liquid crystal polymer) is a glass fiber or mineral-filled resin that features excellent flow properties. It can be injection molded into thin-wall components and has outstanding strength at extreme temperatures to 300°C (572°F). Xydar® LCP resin is inherently flame retardant and has outstanding chemical resistance with little ...
SABIC 2018 - 2019 1 year. United States ... crystal structure, composition) of metal oxide and doped metal oxide nanoparticles ... 1. TiO(2) based NPs are capable of scattering and absorbing UV ...
a recent work on TiO 2(110) rutile single crystals we have found similar results (CH 3 radical production from ethanol 23). This was not the case for anatase (101) single crystals. 24 TiO 2 P25 used in this work contains both phases; it is possible that CH 3 radical formation is predominantly linked to the rutile phase.
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crystals were characterized by XPS and STM as reported previously.55-56 To study their bulk properties, we have further characterized them, in this work, by Raman spectroscopy. Figure 1 depicts the Raman spectra of fresh and reduced anatase (101) and rutile (110) single crystals. Anatase TiO 2 has a distorted tetragonal crystal structure ( -I4 ...