With H2O2 as oxidant, phosphotungstic acid (PTA) was used as heterogeneous oxidation desulfurization catalyst via immobilizing on porous MIL-101. By combining the catalytic activity of PTA with the adsorption property of supporter MIL-101, 91.2% of dibenzothiophene (DBT) in model fuel has been removed....

A series of narrow size distribution nanocluster-assembled Pd films with ultraclean surfaces have been synthesized by plasma-gas-condensation cluster deposition system at different substrate temperatures. The electrocatalytic oxidation of formic acid on nanoclusters-assembled Pd film were studied. Cyclic...

Visible-light responsive photocatalyst BiVO4 were synthesized by simple precipitation method, following by calcination process. The phase structure, morphology, specific surface area and optical absorption properties of as-synthesized BiVO4 were characterized by XRD, SEM, BET, UV-Vis DRS and FTIR, respectively....

Five soil samples in different depths of a site in the close vicinity of a Wuhan iron and steel factory (Core 1) were collected. One uncontaminated soil profile (Core 2) was taken for reference purpose. The soil arsenic content and speciation vertical distribution patterns were analyzed by inductively...

In this paper, Fe thiolate complexes Fe(phen(pyS)2 (M) were synthesized and the properties of complexes were characterized by 1H-NMR and MS. The effects of reaction conditions on performanceof Fe thiolate complexes Fe(phen(pyS)2had been studied. The results of catalytic performance implied thatwhen 2.0...

Fe thiolate complexes Fe(bpy)(pyS)2 (M) were synthesized, the properties of complexes were characterized by 1H-NMR and MS and the effects of reaction conditions on catalytic performance had been studied. The results indicated that when the pH value of catalysis system was 11.6, ethanol/water was used...

Fe thiolate complexes Fe(bpy)(pyS)2 (M) were synthesized, the properties of complexes were characterized by 1H-NMR and MS and the effects of reaction conditions on catalytic performance had been studied. The results of catalytic performance implied that when 5% triethylamine was used as electron donor,...

In this paper, Fe thiolate complexes Fe(phen)(pyS)2 (M) were synthesized, the properties of complexes were characterized by 1H-NMR and MS. The effects of reaction conditions on catalytic performance of catalyst M had been studied. The results of catalytic performance indicated that the optimal reaction...

The keratin was extracted from the wool by sodium sulfite dissolving system. And then different ratios of keratin/polyethylene oxide (PEO) formic acid solution were prepared. The rheological properties and conductivity of solution were studied. The influence of the proportion of keratin/PEO formic acid...

By means of decrease of hardness, neutralization and desalination union technology, the drained wastewater of industrial circulating cooling water system can be treated. The purified water quality (total hardness and calcium ion components) is greatly better than fresh water, and completely can be reused...

The octadecylamine-hectorite composite (ODA-hectotie) has been designed and synthesized. The composite is used for removal of methylene blue (MB) from aqueous solution. Research concerning the effects of pH, composite dose, initial dye concentration and temperature are presented and discussed. Experiment...

Synthetic nanomaterials have the disadvantages of large-scale investment, high energy consumption, complex production process and heavy environmental load. Palygorskite mineral nanofibers are typical porous materials widely existing in nature and have the advantage of high surface area, moderate cation...

For the past few years, selenium has permeated various fields in the life science with its strong vitality, and this fields expanded rapidly. In this paper, research progress on macromolecular bioselenium, especially on selenoproteins, selenium-nucleic acids and the selenium polysaccharides were summarized....

A new strategy of high concentration short duration treatment of Thidiazuron (TDZ) for enhancing adventitious buds formation from hypocotyl explants were attempted in Jatropha curcas. The best shoot buds induction (81.91%) and number of buds per explant (10.16) were obtained from hypocotyl explants treated...

A high-frequency protocol for induction of adventitious buds and plant regeneration from cotyledon explant of Jatropha curcas is described. The cotyledon explants of J. curcas cultured directly onto medium containing Thidiazuron (TDZ) induced regeneration of only poor quality adventitious buds that had...

In this work, a base dye was applied to the dyeing of calcium alginate fiber. The dyeing properties, including dyeing time, pH and temperature, were studied. The results showed that this dye had good affinity to alginate fiber, and the dyeing fastness was also good. This research may provide a new approach...

Solid acid S2O2-8/TiO2-La2O3 (STL) was prepared by calcination at high temperature using complex oxide of TiO2 doped La2O3 as the supporter, and anion S2O2-8 as the accelerant. The catalytic synthesis of n-butyl propanoate over STL was selected as the probe reaction to examine its catalytic esterification...

An unsymmetrical photochromic diarylethene, 1-(2-methyl-5-(9-anthracyl)-3-thienyl) -2-[2-methyl-5-(4-n-pentylphenyl)-3-thienyl] perfluorocyclopentene was synthesized at first. Its photochromic and fluorescence properties were investigated in detail. This compound exhibited reversible photochromism, changing...

A new unsymmetrical photochromic diarylethene 1- [3,5-dimethyl-4-isoxazolyl] -2-[2-methyl-5-acetenyl-3-thienyl] perfluorocyclopentene has been synthesized. Its photochromic in hexane solution and kinetics experiment were investigated in detail. The result indicated that this diarylethene had reversible...

A photochromic diarylethene 1, 2-bis-[2-methyl-5-(3-pentyl) phenyl-3-thienyl] perfluorocyclopentene was synthesized and characterized. Its properties, such as photochromism and fluorescence were investigated systematically. Upon irradiation with UV light, it underwent a reversible transformation from...

In order to fill up the deficiency of the theoretical basis about reduction swelling during Bayan Obo iron concentrate roasting and reduction process, The influence of Na2O content on lattice structures of iron oxides at different reduction stages of Fe2O3 briquetting has been investigated by using the...

The properties of hectorite was strongly affected by their microstructures and purity. Here NaxLixMg3-xSi4O10(OH)2ú4H2O multilayer pancakelike structures were fabricated successfully by hydrothermal reaction of Na2SiO3ú9H2O, MgCl2ú6H2O and LiClúH2O in autoclave at 473K. The synthesis process of hectorite...

A new cationic type asphalt emulsifier of aminoethylpiperazine/formaldehyde modified lignin amine was synthesized by the reaction of lignin, N-aminoethylpiperazine, sodium hydroxide and formaldehyde. The synthesis process was detected by online FTIR technique and the intermediate was found. Based upon...

Coalescence effect of the surface disposal devices is greatly impacted by the large amount of aging oil because of its complicated interfacial properties, which heavily affects oil production. The typical aging oil properties are evaluated, interfacial properties and the causes of formation are discussed...

Polyphenols, flavonoids, triterpenoid and VitaminC from Clinacanthus nutans were extracted by ultrasonic-assisted ethanol extraction. The optimal extracting conditions were established as ethanol as solvent, ultrasound treatment time 35min, solid-liquid ratio 1:45 (g/ml), ethanol concentration 70% and...

The Jurassic coal of NW China has huge recoverable reserves but large spontaneous combustion tendency. Studying on spontaneous combustion mechanism of Jurassic coal is behind of the East and north of the Carboniferous Permian. Therefore, understanding the status of fire prevention of Jurassic seam of...

In order to study uniaxial compressive strength of the recycled lightweight aggregate cement mortar test cubes, replacement rate of recycled lightweight aggregate was selected as variables factors, uniaxial compression test of cement mortar was carried out with the use of five different recycled lightweight...

The paper background is based on the soft rock slope of Yizhou--Liuzhai highway in Guangxi province. Polymer cement curing agents are used to reinforcement the soft rock slope to prevent or slow the soft rock slope softening and disintegration, improve long-term stability of soft rock slope engineering....

The synergy of fatigue load and corrosion can affect the mechanical properties of the steel bar, and accelerate its fracture damage. On the basis of different cycles of fatigue load on the bar, four-month corrosion under the action of acid or alkali medium test was carried out. Then the synergy effect...

To investigate the effect of vacancy concentrations on mechanical properties of single crystal -TiAl, the uniaxial tension tests of -TiAl alloy models at different vacancy based on molecular dynamics simulation was performed. The results shows that obvious brittle behavior in stress-strain curve and...

In order to clarify the creep deformation and fracture behaviors of ultra-purified ferritic stainless steel 429Mo for automotive exhaust systems, the creep behaviors of 429Mo steel at 650øC and different applied stress levels were investigated through performing the creep tests and the microstructural...

The ion nitrocarburized layer was prepared on the surface of 42MnCr52 steel sample by using the ion nitrocarburizing process. The nitrocarbonide grains and holes all in smaller scale distribute equably. The nitrocarbonide surface layer is about 18 æm in thickness. The ion nitrocarburized layer is composed...

High temperature aging method was used to accelerate the aging process of 12Cr1MoV steel which is mainly used as pressure vessel, steam pipes and so on. The evolution of the microstructure and mechanical property was systematically investigated during the process. It is revealed that during the aging...

Due to the poor workability of recycled concrete caused by heavy water absorption, coarse surface and multiple spaces of recycled coarse aggregate, it is proposed that pre-allocated self-compacting mortar shall be adopted to prepare recycled concrete, which solves such problems arising from poor workability...

This study evaluates the effects of fly ash microsphere (FAM) on the flowability and cohesiveness performance of cement paste. FAM is a superfine fly ash captured from the coal-fired power stations. It has a mean particle size of around 2 mm and is of spherical shape. An experimental program comprising...

Nb-Al alloy compounds are expected to be high temperature structural materials. However, the low toughness and poor oxidation resistance are the main obstacles to hinder Nb-Al intermetallics from applications. In this paper, a new monoclinic phase of NbAl3 was proposed by particle swarm optimization....

In this paper, we researched the influence of tensile rate on the tensile fracture process of PA6. The results showed that with the increase of tensile rate, the yield strength of PA6 was on the rise, and the elongation at break was on the decline. The elongation at break declined sharply when the tensile...

The torsion behavior tests on Mg-Gd-Y-Zr magnesium alloy have performed before and after liquid nitrogen cryogenic treatment (CT) by torsional test machine. The experimental results show that the torsional strength and plasticity of the alloys have been significantly improved after CT 72h and 96h, compared...

Fatigue failure is one of the main reasons for the engineering structure's failure, and it is of great significance to predict fatigue life of structure. This paper briefly introduced the principle of stochastic fatigue failure calculation analysis, andÿanalyzed random vibration of aÿT-shaped structure...

Adjacent concrete box-beam bridges are widely used in short and medium span bridges. However, this bridge system has long term durability issues caused by shear key failure and reflective cracking in the upper. This paper investigates a new maintenance method of shear key joint. High performance grouting...

The transient damage problems of copper alloys are the central topic for improving the accuracy and lifetime of electromagnetic launcher. The research works on transient damage behaviors of copper alloys under high-speed sliding electrical contact during the past two decades were summarized in this paper...

The distribution of aggregates is intensive at the bottom of concrete model but scarce at the top position when polygon aggregates are packed by traditional random walking algorithm. In order to simulate the randomness of aggregates distribution more effectively and realistically, a bidirectional walk...

25 groups of GAC-20 modified asphalt mixture are designed by referencing the orthogonal design method, the high temperature rutting test are carried out , the related model of the fractal dimension and the high temperature performance evaluation index dynamic stability is established by using fractal...

In this paper, a nonlinear line-spring model with new plastic constitutive relations for the line-spring is presented based on the fully plastic solutions of the single-edge cracked strip subjected to pure tension and pure bending. Numerical solutions of J-integral which characterizes the amplitude of...

The exploration and research have been further developed on Bionics principle in the felidof new wood composites preparation. Originally, the preparation ideas of gel-type wood composite material is based on utilizing the natural wood material which is formed during the long-term evolution of biological...

The influence of different strength (0-1.4T) of DC magnetic field on crystal orientation and mechanical properties of remelting Mg-Y-Cu-Zr alloy reinforced by long period ordered structure were studied. The results show that with the increase of strength of magnetic field, primary phase and second phase...

0.6mol% V2O5-doping 0.996(0.95Na0.5K0.5NbO3-0.05LiSbO3)-0.004FeBiO3 ((KNN-LS- BF)-V2O5) piezoelectric ceramics were synthesized by the solid-state reaction process, and the influence of sintering time on structure and properties of (KNN-LS-BF)-V2O5 ceramics were studied. It was found that all the samples...

The corrosion behavior of 2024 alloy in 0.6 mol/L NaCl solution has been studied by EIS, SECM and SEM at the corrosion potential. The EIS results show that the pitting could have occurred between 2 hr and 6 hr immersion and the corrosion dissolution becomes severe with the increase of immersion time....

Recently, researchers focus on how to prepare practical VO2 films with varied colors. Herein, we developed a facile solution process to modify the spectrum of VO2 so that the color of VO2 film could be tuned. The VO2 nanoparticles were functionalized by the 3-aminopropyltrimethoxysilane(APTMS), andthe...

Boronizing of steel surface leads to the formation of two phases (FeB, Fe2B). FeB phase has high brittleness due to its high hardness. Thus, the traditional boronizing cannot be applied for tools and machine parts, working in conditions of dynamic loads, but the new method of electron- beam heating in...

Boronizing is one of the most effective methods of thermochemical treatment of iron-carbon alloys. Boride layers formed with the diffusion can considerably increase abrasion resistance (up to 5-30 times), heat resistance (up to 1.5-2 times) of steels. The aim of this paper is to study structure and wear...

Based on the ANSYS software, a finite element model using for analyzing the properties of the developed cryogenic composite overwrapped pressure vessels (COPV) is established. The stress and strain conditions under the operational pressure were analyzed including of the overwrapped fibrous layer and...

The stress relaxation of the metallic seal is a general problem during its long-term service, which is harmful for the sealing performance. For the metallic seal, the sealing mechanism and the problem of the stress relaxation are analyzed, and the research methods applied to study the problem of stress...

As the key material of gas turbines used in elevated temperature, the mechanism of delamination and failure of thermal barrier coatings (TBCs) under service conditions has been the hot spot of research for a long time.The influence of thermal gradient on thermomechanical fatigue (TMF) behavior of TBCs...

Based on the research of crashworthiness of advanced composites, PAM-Crash simulation software was utilized to predict the crash behavior of thermoset matrix and thermoplastic matrix. The simulation results demonstrated that the thermoset matrix and thermoplastic matrix showed an ideal fragment collapse...

Thermal insulation coating has attracted more and more attention because of the advantages of economic, construction convenient and good heat insulation effect, and it will be expected to promote the development of coatings market and heat insulation materials applications. Based on the above reason,...

The performance variations of pouring organic glass under the different accelerated aging test conditions whose brand is YB- 3 have been studied, which have reached the specified life, the result show that the overall trends the properties of the YB- 3 being used the specified life slightly decrease...

The surface cleanliness grade of some steel structures which are in the harsh environment such as in tidal and splash zone or are hard to construct on site is difficult to meet the requirements of high grade such as cleanliness grade Sa21/2 (ISO 8501). There may be water, rust and original coating on...

For the purpose of solve seawater pipe's anti-corrosion materials problem and it is allÿofÿvarieties, this thesis come up with the copper alloys-nickel composites by Laser direct writing and the method's application and equipment, this thesis also recommend the copper alloys-nickel composites' laser...

In this paper, the preparation technology of super-fine tungsten powder has been studied by using of induction plasma powder synthesis system, and the flow-ability, particle size, the impurity content of the powder before and after plasma treatment have been measured and compared. The result shows that,...

Silica (SiO2) was used to modify the waterborne ultraviolet (UV) curing wood coatings, and the waterborne UV curing wood coating was prepared by optimizing the process parameters. The mechanical properties of the waterborne UV curing wood coating (hardness, adhesion and impact strength) and gloss were...

The talcum powder was employed for the single modification of waterborne ultraviolet (UV) curing wood coatings, through optimizing process parameters to prepare the waterborne UV curing wood coatings. It was found that when talcum powder content in Waterborne UV curing wood coatings was at 2.0%, the...

The tensile experiments were carried out under different conditions of pulse current on pure titanium. The influence of pulse current density on the the actual stress strain curve, elongation and the tensile strength were also analyzed. The experimental results show that pulse current could change material...

The fatigue properties and S-N curves of the 3mm thickness SUS301L-MT and 5mm thickness SUS304 stainless steel sheet lap fillet welded joints made by plasma arc welding, plasma-MIG hybrid welding as well as resistance spot welding are investigated respectively based on the results of fatigue tests. The...

The effect of adhesive thickness on the vibration features of the steel disc was investigated by the modal analysis, buckling analysis and static analysis based on the practical application. The results from the elasto-plastic finite element analysis show that the natural frequency of the structure is...

The numerical analysis of the inner step length on the stress distribution in weld-bonded single aluminum lap joint was investigated using elasto-plastic finite element method (FEM). The results from the numerical simulation show that the peak stress along the bondline peak stress at the end of lap zone...

The effect of the nugget position on the stress distribution in aluminum single-lap weld-bonded joint was investigated using elasto-plastic finite element method (FEM). The results from the numerical analysis show that all the peak stresses of stress components Sx, Sy, Sxy and von Mises equivalent stress...

The effect of the adhesives modulus from 0.05 GPa to 6 GPa on the stress distribution in weld-bonded single lap Dual Phase 600 steel joint was investigated using elastic finite element method (FEM). The results from the numerical simulation show that all the peak values of the stresses along the mid-bondline...

The die optimization design is an effective way of overcoming the extrusion problems of plastic tube. Due to the obvious influence of the rheological properties of melt on the extrusion shape of the plastic tube, the reasonable cross-section shape of the die is one of most important factors in the die...

Grinding force has important effects on the forming and quality of the hardened layer. The grind-hardening test of 42CrMo steel was carried out on a forming grinding machine. The results show the chief influence factor on the tangential and normal grinding force is the grinding depth, the grinding speed...

The effect of the nugget size from 2 mm to 8 mm in the lap zone of the adherend on the stress distribution in weld-bonded single lap DP 600 steel joint was investigated using elastic finite element method (FEM). The results from the numerical simulation show that the value of the peak stress along the...

Grind-hardening is not only a complex process coupling mechanical, dynamical and thermal effects, but a process containing distinct changes of microstructure and performances in the surface layer of the grinded workpiece. Based on the software Deform-2D, this paper simulated the distribution and variation...

The influence of partial substitution of Fe by Co on the glass forming ability and soft magnetic properties of the Fe71-xNb6B23Cox (x=1, 2, 3, 4) metallic glasses were investigated using X-ray diffraction (XRD), differential scanning calorimetry (DSC), and vibrating sample magnetometer (VSM). These glassy...

As a kind of new lubricant additive, Nano SiO2 particles exist in the form of particle cluster in suspensions. The objective of the present study is to put forward the lubrication behavior of Nano SiO2 clusters in water-based cold rolling liquid through cold rolling experiments of Q235 steel. PH values...

The geometrical structure, electronic properties, surface energy and formation enthalpy of Ni-rich Al-based quasicrystals cluster models have been studied with the generalized gradient approximation (GGA) based on the density functional theory (DFT). Based on the first-principles calculation method,...

Monodisperse -Bi2O3 nanowires with the diameter of 50100 nm and the length-diameter ratio of 60100, were synthesized successfully by solution precipitation method, an efficient and convenient route, with the assistance of oleic acid. X-ray diffraction (XRD) and field-emission scanning electron microscope...

Magnetic core/alumina shell (MFeCA) structured nanospheres were obtained by a hematite core/alumina precursor shell (HFeCAP) nanosphere precursor. A uniform alumina layer was coated on the surface of -Fe2O3 by the self-assembly of a stearic acid/alumina isopropoxide complex. Hematite cores of the nanospheres...

Palygorskite mineral nanomaterials are typical porous materials widely existing in nature and have many micropores and mesopores, which could play an active role in many fields such as thermal insulation functional additive for composite materials. Based on the above reason, this paper briefly summarized...

The built-in electric field across LaAlO3/SrTiO3 heterointerface, which hosts two-dimensional electron gas (2DEG), is studied by off-axis electron holography in transmission electron microscopy (TEM). On the contrary to the well-accepted polar catastrophe model, which indicates a Zener breakdown due...

In this paper, using carbon nanotubes (CNTs) as the carrier, a new type of heterogeneous material Pt-PdNiOx/CNTs was prepared by impregnation reduction method. By means of XRD, TEM, XPS and electrochemical analysis, Pt-PdNiOx/CNTs catalyst of the structure and in the methanol oxidation catalytic mechanism...

Epoxy resin/polyetherimide/graphene nanoplates (EP/PEI/GnPs) composites were prepared by solution blending, and the effects of GnPs on the phase structure and electrical properties of the systems were investigated by scanning electron microscopy (SEM), optical microscopy (OM), digital ultrahigh resistance...

The preparation and attractive performance of cobalt nitroprusside/multi-walled carbon nanotubes (CoNP/MWCNTs) composite electrodes, based on the electrochemical deposition of CoNP onto the surface of MWCNTs modified electrode, was described. The resulting CoNP/MWCNTs composites brought new capabilities...

200 nm-thick Ni80Fe20 films were deposited on anodic aluminium oxide (AAO) and SiO2/Si(100) substrates at 300 K by a magnetron sputtering system with the oblique target. The film grown on the AAO substrate has a network structure while that deposited on the SiO2/Si(100) substrate is continuous. The network...

Spinel LiMn2O4 was synthesized by solid-state method,using Mn2O3 as manganese source. By X-ray diffraction, scanning electron microscope and electrochemical performance test, effects of impurity calcium from manganese source.ie. MnCO3on the electrochemical properties of spinel LiMn2O4 weresystematically...

Mesoporous NiCo2O4 nanocomposites have been successfully synthetized by a xerogel route followed by heat-treatment process using propylene oxide as a gelation agent. The prepared materials are characterized by X-ray diffraction, FESEM, HRTEM and N2 adsorption/desorption. The results suggest the NiCo2O4...

A simple method to fabricate pyroelectric sensors array using standard semiconductor process on Silicon substrate was investigated. 600 nm porous SiO2 film was prepared by spin coating, working as ultra-thin thermal insulator. Good insulation property was achieved owing to its extremely low thermal conductance....

Metal-organic frameworks have drawn great attention over the last two decades owing to their interesting structures and potential applications in various areas such as gas storage, catalysis and energy storage. This porous crystalline material also has potential application in lithium-ion batteries as...

The texturization of monocrystalline silicon wafers using different K2CO3 concentrations under different times and temperatures solution has been investigated. In this paper, the pyramid density, size and uniformity on the wafer surface were discussed in different variables. We found that texturing time...

Gallium nitride (GaN) has attracted much attention for a long time as a promising material for semiconductor device application in the transistors, visible light-emitting sources and high powder diodes. Many investigations are paid to the synthesis method, the process of crystal growth, structure and...

The tin oxide ceramics electrode were prepared by the traditional solid phase sintering method. Influence of different ZnO doping amount on the microstructure and electroconductibility of the ceramics by SEM and XRD and other analytical instrument and the relationship between composition, performance...

The development of white organic light emitting diodes (WOLEDs) holds great promise since they combine the potentialities of high efficiency and inexpensive production with the appealing features of high-color-quality white light. Nevertheless, reliability and color quality still need to be optimized...

We perform first-principles calculations to study the electronic structures and optical properties of rutile SnNxO2-x as a possible photocatalytic material. It is found that N incorporation lead to the enhancement of p states in the energy gap and the decrease of band gap. The optical transition between...

MnO2 is directly deposited on active carbon (AC) to synthesize AC/MnO2 composite to improve the capacitance of electrode material. AC/MnO2 composites are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and N2 adsorption-desorption, and the electrochemical properties are evaluated...

Both two-dimensional (2D) ZnO nanobowl arrays and three-dimensional (3D) ZnO inverse opals were fabricated using hydrothermal method with assistance of the three-dimensional colloidal crystal templates. Scanning electron microscope measurements showed the morphological evolutions of ZnO from rods to...