Materials Literature
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Kinetics is the study of rates of chemical processes, which includes investigations of how different experimental conditions can influence the speed of a chemical reaction and the reactions mechanism. In this paper, the influences of several parameters including particle size and mass of copper-based oxygen carrier, r…
The feasibility of making new strength agent by cooking corn stalk rich in hemicellulose was studied. Corn stalk was cooked by normal ethanol pulping with best process parameters obtained by early discovery. The effect of corn stalk agent on physical strength of package board (made by 20% mineral fibre and 80% recycle…
The title complex, [Co (ncpb)(μ-4,4'-bpy)(H2O)2](4,4'-bpy) (1) (4,4'-bpy = 4,4'-bipyridine, ncpb = 5-nitro-4-carboxylatophenylboronic acid), was synthesized from a hydrothermal reaction of CoCl2·6H2O, ncpb ligand and 4,4'-bpy, and characterized by single-crystal X-ray diffraction analysis. The complex 1 crystallizes i…
Mesoporous MCM-41 molecular sieve was synthesized hydrothermally and selected tetraethoxysilane as silica source. Solid superacid SO42- / SnO2 was supported on MCM-41 by dipping and roasting. The samples were characterized by XRD, TEM, and FT-IR. Solid superacid evenly dispersed on MCM-41 with a good pore structure. T…
Anatase/brookite mixtured TiO2 nanoparticles have been synthesized by using a two-step process through a chimie douce technique. The as-prepared powders were characterized by Fourier transform infrared (FT-IR) spectra, X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM),…
A conceptual design of tritium-breeder blanket for prototype DEMO is introduced. In this concept, Li4SiO4 pebbles are chosen as tritium-breeder material and Be for neutron multiplication. To confirm the thermal effectiveness,a CFD code FLUENT is used for the calculation. The result indicated that, the thermal effectiv…
Green liquor, a process liquor of alkali recovery in pulp and papermaking industry, pretreatment used in poplar kraft pulping process and the influences of pretreatment conditions on pentosan extraction have been studied. The results show that the influence of green liquor dosage on pentosan extraction is the most rem…
The cylinder head is one of the most important and complex parts in the internal combustion engine. In this paper, in view of three-dimensional finite element applications covered in the cylinder head, it mainly discusses the development trend both at home and abroad from the cylinder head finite element model establi…
The GaAs photocathode has been widely used in optoelectronic devices such as image intensifiers and photomultiplier tubes, but it is inevitable for these devices to withstand a variety of mechanical shock. In order to study the impact on the GaAs photocathode’s photoemission performance caused by mechanical shock, GaA…
Microchannel plate is widely used in the field of low light level night vision, photomultiplier, tubes, X-ray enhancer and so on. In order to meet the requirement of microchannel plate electron multiplier, we used the method of thermal oxidation to produce a thin film of silicon dioxide which could play a role in elec…
Titanium and gallium co-doped zinc oxide (TGZO) thin films with highly (002)-preferred orientation were grown on glass substrates by magnetron sputtering. The effect of thickness on structure and optical properties of the deposited films were investigated by X-ray diffractometer and spectrophotometer. The results show…
O lixão desativado do município de Lages está localizado entre as coordenadas 27º46´15,38’’S e 50º15´10,92’’O em uma área de 48.000 m2 com extensa rede de drenagem, cujo entorno encontram-se áreas de proteção permanente e reflorestamentos com pinus. Coletou-se amostras de solos compostas entre as profundidades de 0-20…
TiO2 photocatalysts doped by Fe3+ with different contents were prepared by adsorption phase synthesis. The influence of Fe3+ doping with various concentrations on the crystallization of TiO2 was explored by XRD. Then photodegradation experiments of methyl-orange were employed to evaluate the activity of these photocat…
In this paper, a low carbon steel was used as the substrate to prepare the carbon nanostructural materials by the oxygen-acetylene flame method. The experimental results show that the composite products including nodular carbon nanoparticles and amorphous carbon were obtained on the substrate after a mechanical polish…
Pr-Zr mixed oxides prepared by co-precipitation were used as oxygen carriers for converting methane into synthesis gas through gas-solid reactions. The structural evolution and reducibility of Pr-Zr oxygen carriers with calcination temperatures from 600 to 1200°C were investigated by XRD and TPR techniques and correla…
A orange organic light-emitting device has been fabricated with a structure of ITO/m-MTDATA (45 nm)/NPB (8 nm)/ DPVBi:DCJTB 0.5 % (15 nm)/TPBi (x nm)/Alq3 [(60-x) n /LiF (1 nm)/Al£¬where x=0, 4, 7 and 10, respectively. N-arylbenzinmidzoles (TPBi) was used as the excton-blocking layer resulting mixture of lights from D…
Ultrasound energy could strengthen the adsorption of dyes on fiber. The acceleration efficiency of ultrasound was investigated by dyeing cotton with reactive dyes. The experimental findings showed the accelerative efficiency of ultrasound decreased with the prolongation of dyeing time and increment of dyeing temperatu…
Lanthanum doped TiO2 powders were prepared by hydrolysis of titanium tetra-n-butyl oxide and La (NO3)3 in solution. The resulting powders were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-Vis absorption spectroscopy. The photocatalytic activities of doped samples were evaluated…
Estimating the reduction potential of methane (CH4) emissions in order to provide some advices for reducing them in paddy ecosystem. In order to study the temporal and spatial variation characteristics and the reduction potential of CH4 emissions, conducting a database of CH4 emissions of rice growing seasons and rice…
Activated carbon as a supporter, using a redox reaction of MnSO4H2O and KMnO4, carbon-supported amorphous MnO2 catalysts were prepared for zinc-air battery positive. Using XRD and specific energy curve, the effects of MnO2/C and the corresponding zinc-air battery were studied by carbon material type and its amount, c…