Herein, a catalytic reductive fractionation of lignocellulose is presented using heterogeneous cobalt catalyst and formic acid or formate as hydrogen donor. The untreated birch wood yields monophenolic compounds in up to 34 wt % yield total lignin, which corresponds 76 the theoretical maximum yield. Model compound studies revealed that main role stabilize reactive intermediates formed during organosolv pulping by transfer hydrogenation hydrogenolysis reactions. Additionally, responsible for...

Proton irradiation with a primary ion energy of 2 MeV was used to simulate radiation damage in UN and (U,Zr)N fuel pellets. The pellets, nominally at room temperature, were irradiated peak levels 0.1, 1, 10 dpa 100 resulting hydrogen concentration most 1 at. %. Microstructure mechanical properties the samples investigated compared before after irradiation. induced an increase hardness, whereas decrease Young's modulus observed for both samples. Microstructural characterization revealed...

Structure–property relationships were established for undoped and europium-doped ZnO nanostructures, correlating their photocatalytic activity with optical structural material properties.

Zinc oxide (ZnO) is a semiconductor with wide range of applications, and often the properties are modified by metal-ion doping. The distribution dopant atoms within ZnO crystal strongly affects optical magnetic properties, making it crucial to comprehend structure down atomic level. Our study reveals its contents in Eu-doped nanosponges up 20% Eu–O clusters. Eu was distributed over ZnO:Eu crystals, an additional amorphous intercrystalline phase observed, especially sample. electron pair...

An efficient, template-free solution-chemical route to nanostructured ZnO sponges is presented: A mixture of Zn(NO3)2·6H2O, Zn(OAc)2·2H2O, and triethanolamine in methanol was evaporated a highly viscous liquid rapidly heated >200 °C for 1-3 min achieve porous, nanocrystalline ZnO. The precursor concentrate obtained on evaporation air characterized by TG, DSC, IR spectroscopy, the product XRD, SEM, TEM, spectroscopy. fast reaction forming started at 140 finished within few seconds. Scherrer...

A low-cost template-free solution chemical route to highly porous nanocrystalline sponges of ZnO-EuO1.5 with 0–5 mol % Eu is presented. The process uses Zn– and Eu–acetate–nitrate triethanolamine as precursors in methanol. After evaporation the solvent heating at 200 °C for 3 min, crystalline ZnO:Eu minor amounts organic residues were obtained. Heating 400 replaced organics carbonate, which its turn was decomposed temperatures below 600 °C, forming sponges. Samples heated 200–1000 min...

Abstract Nanocrystalline ZnO sponges doped with 5 mol% EuO 1.5 are obtained by heating metal–salt complex based precursor pastes at 200–900 °C for 3 min. X‐ray diffraction, transmission electron microscopy, and extended absorption fine structure (EXAFS) show that phase separation into ZnO:Eu c ‐Eu 2 O takes place upon 700 or higher. The unit cell of the clean oxide made 600 shows only ≈0.4% volume increase versus undoped ZnO, EXAFS a local is little affected Eu‐doping an average Eu 3+ ion...

ZnO is a semiconductor with wide range of applications and often the properties are modified by metal-ion doping. The distribution dopant atoms within crystal strongly affects optical magnetic making it crucial to describe structure down atomic level. This study reveals contents in Eu-doped nano-phase sponges up 20% EuO1.5. High-resolution STEM imaging, EELS electron pair-distribution function (ePDF) provided distances. Eu was distributed over ZnO:Eu crystals, but addition, an amorphous...

This study presents a novel approach for the synthesis of WC-Ni cemented carbides with enhanced mechanical properties. A low-cost solution-based route was used to coat WC powders well-distributed metallic nickel dots measuring between 17 nm and 39 in diameter. Varying compositions loadings 2, 6, 14 vol% Ni were consolidated using spark plasma sintering (SPS) at 1350 °C under 50 MPa uniaxial pressure giving relative densities 99 ± 1%. The sintered had an even distribution binder phase all...

A carbothermal nitridation route to nanophase ZrN1-xCx powder using nitrogen gas and a highly homogeneous solution derived carbon-ZrO2 nanocomposite is described. Composites with 2–4 nm sized ZrO2 particles were prepared by hydrolysis of Zr(OPrn)4 sucrose 2–8 sucrose-C:Zr heating 600 °C. The phase-evolution on was elucidated in detail using: TG-DTA, XRD, XPS, IR- Raman spectroscopy, SEM-EDS, TEM-EDS. With 5–8 C:Zr samples heated 1495 °C, somewhat agglomerated single-crystalline Zr(N,C) sizes...

The sintering of a 14 ​wt% nickel nano-dot coated NbC powder was investigated using dilatometry in combination with XRD, ToF-ERDA, PIXE, SEM-EDS/EBSD/TKD, and TEM-HAADF/EDS/EELS for analysis samples heated to 1375, 1405 1500 ​°C, 30 ​min annealing. main step at 1110–1375 succeeded by slower step, centred before the final smaller densification ​°C. grain-growth took place on heating ​°C ​min; from ca. 0.5–5 ​μm (average 1 ​μm) 1375 5–30 10 ​min. NbC0.91-0.94 phase showed micro-hardness...

Abstract Invited for this month's cover is the group of Joseph S. M. Samec at Stockholm University together with Duangamol Tungasmita from Chulalongkorn University. The image shows cobalt‐based heterogeneous catalyst on nitrogen‐doped carbon support outperforming noble‐metal‐based competitors. Communication itself available 10.1002/cssc.201802497 .

A fast, low cost solution route to nickel dot coated NbC powder using Ni(NO3)26H2O, Ni(OAc)24H2O and triethanolamine (TEA) as precursors in methanol solvent was developed. After mixing the precursor with 50–300 ​nm sized evaporation of solvent, heating 150 ​°C, or higher, yielded evenly covered well-dispersed metal dots, 6–25 size, depending on loading temperature. Coatings yielding 4 14 ​wt% were studied at temperatures from 200 700 TG-DTA, XRD, SEM, XPS Ar+-ion etching, TEM/DF, STEM/HAADF/EDS.

Abstract Single and multilayer films of La 0.67 Sr 0.33 MnO 3 CoFe 2 O 4 were deposited by spin‐coating. The all‐alkoxide precursors allowed inorganic gel extreme homogeneity to be formed converted phase pure complex oxides at low temperatures. made with La‐ Ca‐methoxy‐ethoxides Mn 19 12 (moe) 14 (moeH) 10 as 800 °C. obtained extremely 275 °C, using a new ‐methoxyethoxide precursor. decomposition microstructural development on heating was described TG, TEM, XRD IR spectroscopy. showed no...

The detailed structure of ZnO doped with 5 at.% (metal) the large aliovalent Eu3+-ions was investigated using EXAFS to describe local Eu and Zn coordination. microstructure, crystalline phases, contents unit-cell parameters for ZnO:5%Eu sponges synthesised at 200 900 oC were obtained by XRD, SEM, TEM analysis. XRD showed peaks solely h-ZnO 600 sample, while heating 700 higher caused phase separation into h-ZnO:Eu c-Eu2O3. a close zero increase in unit cell-volume ca. 0.4 vol%, compared...

The detailed structure of ZnO doped with 5 at.% (metal) the large aliovalent Eu3+-ions was investigated using EXAFS to describe local Eu and Zn coordination. microstructure, crystalline phases, contents unit-cell parameters for ZnO:5%Eu sponges synthesised at 200 900 oC were obtained by XRD, SEM, TEM analysis. XRD showed peaks solely h-ZnO 600 sample, while heating 700 higher caused phase separation into h-ZnO:Eu c-Eu2O3. a close zero increase in unit cell-volume ca. 0.4 vol%, compared...