Materials Literature
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MoS 2 and Ni-promoted MoS 2 catalysts supported on γ-Al 2 O 3, siliceous SBA-15, and Zr- and Ti-modified SBA-15 were explored for the simultaneous hydrodesulfurization (HDS) of dibenzothiophene (DBT) and hydrodenitrogenation (HDN) of o -propylaniline (OPA). In all cases, OPA reacted preferentially via initial hydrogen…
Palladium (Pd)-catalyzed cross-coupling reactions are among the most important methods in organic synthesis. We report the discovery of highly efficient and green photocatalytic processes by which cross-coupling reactions, including Sonogashira, Stille, Hiyama, Ullmann, and Buchwald–Hartwig reactions, can be driven wi…
An unprecedented attempt was conducted on suitably functionalized integration of three-dimensional hyperbranched titania architectures for efficient multistack photoanode, constructed via layer-by-layer assembly of hyperbranched hierarchical tree-like titania nanowires (underlayer), branched hierarchical rambutan-like…
Nickel supported on silica-alumina is an efficient and reusable photocatalyst for the reduction of CO2 to methane by H2, reaching selectivity above 95% at CO2 conversion over 90%. Although NiO behaves similarly, it undergoes a gradual deactivation upon reuse. About 26% of the photocatalytic activity of Ni/silica-alumi…
Metal-organic frameworks (MOFs) are hybrid porous materials with many potential applications, which intimately depend on the presence of chemical functionality either at the organic linkers and/or at the metal nodes. Functionality that cannot be introduced into MOFs directly via de novo syntheses can be accessed throu…
Thin films of nickel oxide were deposited with different thicknesses in a mixed atmosphere of O 2 and Ar gases from a high purity target of 99.99% nickel using the reactive DC-sputtering technique. The same amount of the Pt -catalyst was sputtered from a high purity target of 99.99% platinum in Ar atmosphere onto the…
We report high-pressure powder synchrotron X-ray diffraction measurements of overdoped BaFe1.8Co0.2As2 under quasi-hydrostatic pressure up to 40.1 GPa. Our results indicate that a tetragonal (T) to collapsed tetragonal (CT) phase transition occurs at 16.8 GPa and the two phase coexist until 30 GPa, which has not been…
Abstract Generally, the clarification of hydrogen induced component damage cases by means of failure analysis is based on fractographic examinations in combination with hydrogen analyses. However, due to high diffusion rates of hydrogen in steels at RT (room temperature), providing the analytical evidence of an excess…
Novel styrene monomers bearing a five or seven-membered spiroorthoester structure (SOE5, SOE7) were synthesized and their radical polymerizations as well as volume change during crosslinking of the obtained polymers were investigated. SOE5 and SOE7 were prepared from 4-vinylbenzyl glycidyl ether and γ-butyrolactone or…
A detailed experimental investigation of the (19)F nuclear magnetic resonance is made on single crystals of the homometallic Cr8 antiferromagnetic molecular ring and heterometallic Cr7Cd and Cr7Ni rings in the low temperature ground state. Since the F(-) ion is located midway between neighboring magnetic metal ions in…
K 2 Ti 6 O 13 nanowires are excellent inorganic nanomaterials, which have high value and huge potential use in many fields. However, the biocompatibility of K 2 Ti 6 O 13 nanowires will be directly related to its application. But the quantity of its hemocompatibility reports is limited. In this study, K 2 Ti 6 O 13 na…
The formation of ordered one-dimensional graphene ripples of nanometer periodicity with exceptionally large buckling has recently been observed on Ir(001). In this phase, chemisorbed lines of graphene, only a few atoms wide, strongly bind to the substrate along Ir[010], while the whole graphene film markedly buckles b…
The polyimide (PI)/maghemite (γ-Fe 2 O 3 ) nanocomposite fibers with magnetic behavior were prepared by electrospinning from polyamic acid/iron oxide (Fe 3 O 4 ) solution, followed by thermal imidization process. The effect of Fe 3 O 4 nanoparticles content in precursor mixture solution on the properties of PI/γ-Fe 2…
In this study, the effects of two variable parameters namely nanoclay and coupling agent on the durability against fungal attack and water absorption of wood plastic composites (WPCs) were investigated. Composites based on high density polyethylene (HDPE), sanding dusts (SDs), and nanoclay (montmorillonite type) were…
There are a large number of atomically thin graphitic films with a structure similar to that of graphene. These films have a spread of band gaps relating to their ionicity and, also, to the substrate on which they are grown. Such films could have a range of applications in digital electronics, where graphene is diffic…
Presented here is a novel one-step synthesis of oxide or hydroxide nanoparticles using, for the first time, potassium superoxide (KO2). This work demonstrates that the reaction of KO2 with different salt solutions produces grams of stable, near unit-cell sized nanoparticles. This new synthetic technique is applied to…
In this study, the thermally stable poly(amide–imide) (PAI)/cupric oxide (CuO) nanocomposites (NCs) containing 4, 6 and 8 wt% of CuO nanoparticles (NPs) were prepared by ultrasonic technique. At first, the optically active PAI was synthesized from the polymerization of a chiral monomer, N-trimellitylimido-l-valine, wi…
The heat was on! In their Communication on page 5044 ff., P. Woisel, R. Hoogenboom, G. Cooke et al. describe the supramolecular host–guest interactions between a poly(N-isopropylacrylamide) copolymer with naphthalene side chains and the tetracationic macrocycle cyclobis(paraquat-p-phenylene), which enabled the develop…
Microscopic phase separation in immiscible polymer melts can be significantly altered by the presence of dispersed nanoparticles and externally applied electric fields. Inducing order or directionality to the resulting microstructure can lead to novel materials with efficient synthesis. Here, the coupled morphology of…
Novel organic-inorganic hybrids of various sizes were generated by reaction of 1,8-octanediphosphonic acid (ODP) and (NH4)6Mo7O24 in aqueous solution. The formation of rodlike hybrids with variable numbers of covalently bound ODP and polyoxomolybdate (POM) units can be tuned as a function of increasing (NH4)6Mo7O24 co…