Materials Literature
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ZnO,La3+/ZnO,Ce3+/ZnO and La3+-Ce3+/ZnO photocatalysts were prepared by a sol-gel process and characterized by X-ray diffraction,transmission electron microscopy,ultraviolet and visible spectrophotometry,and BET specific surface area analysis.The photocatalytic activity of these photocatalysts was investigated by phot…
The Ce-TiO2/diatomite photocatalytic materials were prepared by low-temperature combustion synthesis(LCS) method,which were characterized by XRD and SEM.The optimized photocatalytic preparation and degradation conditions of the supported photocatalytic materials were studied and determined,which selected Rhodamine B s…
OBJECTIVE To elucidate silica nanoparticle-induced cytotoxicity and its mechanism by investigating the effect of silica nanoparticles on cells. METHODS Cell viability was examined by MTT assay after A549 cells were exposed to 20-and 50 nm silica nanoparticles for 24 h. Radical anion( O 2-·),hydroxyl radical( ·OH),hydr…
Precursor FePO4 was prepared via homogeneous precipitation with Fe3+ as iron source,then LiFePO4 was synthesized by carbon-thermal reduction method using obtained FePO4 as precursor,its electrochemical performance was studied.The results demonstrated that,when precursor was prepared by homogeneous at optimal condition…
Surfactants can significantly reduce the surface tension of the material,in terms of scientific research,production,and application got more and more attention.Gemini surfactants as representative of the development direction of the surfactant,more and more attention of scholars at home and abroad.Compared with a conv…
Fatigue damage of metallic materials has become a major constraining factor in service life of metal parts.The most effective method is applied water jet shot peening to change the residual stress of material surface in order to enhance the fatigue life of the work piece.In this article,based on the finite element the…
The morphology,microstructure and elemental composition of the single-crystal W nanosheets/nanobelts synthesized by chemical vapor deposition,using WO2(OH)2 and H2 as reaction precursor,were characterized by SEM,TEM and EDS.The as-synthesized W nanosheets/nanobelts have a length of 10~60 μm and a thickness of 100~300…
Effect of niobium on phase transformation and lamellar spacing of pearlites of high carbon steels during continuous cooling was studied on Gleeble 1500 thermo-mechanical simulator and microscopes.The results show that adding 0.04wt% niobium to high carbon steels made CCT curves significantly move to the lower right an…
Wood porous ceramsite( WPC) was prepared by calcination with palygorskite( Pg),sawdust and sodium silicate. As prepared ceramsite was proved to meet the national standard of water treatment of WPC. Furthermore,in various tests for the ceramsite,compressive strength was the principal factor to determine the mechanical…
Shot peening of S280 steel was conducted under different processing conditions.Furthermore,the surface morphology,roughness,rotary bending fatigue life,and fatigue fractograph of the stainless steel specimens before and after shot peening were analyzed,and the residual stress field of the steel specimen after shot pee…
A conceptual design of the passive residual heat removal system which can meet the safety requirement was developed for 10 MW Molten Salt Reactor Experiment(MSRE) designed by ORNL. The constitution, main components and main design parameters of the system were presented. Thermal-hydraulic behaviors such as natural cir…
The low-cost diamond/aluminium composites were prepared by the pressureless metal infiltration process,and the microstructure,interface and thermal properties were investigated.The results indicate that the diamond/aluminium composites have high relative density,and the diamond particles distribute uniformly.With the…
Copper oxide nanoflower and iron oxide nanoring were prepared by membrane templating and hydrothermal,respectively.Copper oxide nanoflower and aluminum composite were self-assembled,so did iron oxide nanoring and aluminum.The connection between different materials were enhanced by self-assembly.The heat release and pr…
Research progresses in carbon footprint of textile and apparel products both at home and abroad are reviewed in this article.Combined with the characteristics of textile and apparel production,several issues to be resolved urgently are summarized.These are: accounting boundary is not clear,the actual working hours of…
Objective To screen the active fractions of the analgesic and anti-inflammatory effects in the whole herb of desert plant,Cynanchum komarovii.Methods The 70% ethyl acetate extracts were prepared by microwave assisted extraction method and then were extracted by dichloromethane,ethyl acetate,and n-butyl alcohol for thr…
Along with the rapid development of micro and nanotechnology, the colloidal particles are taking more and more important roles in biological field as detective probes for disease diagnosis and drug carriers for sustained release and targeted delivery. On one hand, to fulfill the demands of these biological application…
In order to describe the yarn' s cross-section geometry of the woven plain fabric,it was necessary to study the flattening of the cross-sections of the yarns along their central lines. 9 kinds of samples of low and medium density fabrics with different tightness in weft and warp directions were designed and crossing p…
The influence of calcium-based particles on the selective non-catalytic reduction(SNCR) process was investigated in a drop tube furnace reactor;the tests under different temperatures(600~1 100 ℃),normalized stoichiometric ratio(NSR) of NH3/NO(0.5~2.0) and O2 concentrations(0.5%~5.0%),with ammonia and urea as reducing…
As one of meshless methods.The material point method is a new numerical simulation method which evolved from the Particle-in-Cell method.The MPM takes advantage of both Eurlerian and Lagrangian methods.Strain and stress values of the material points under impact load are calculated by governing equations and constitut…
Objective To prepare PVA/CS porous hydrogen designed for cartilage defect repair.Method PVA/CS porous hydrogen was prepared by polyvinyl alcohol(PVA),chitosan(CS),and Polysorbate-80(Tween-80).The hydrogen preparation process consisted of emulsifier-foaming,freeze-drying and surfactant-cleaning.The porous hydrogen were…