作者：
Fang FengRu ChengFenghua MengChao DengJan FeijenZhiyuan ZhongSchool of Chemical and Bioengineering
Jiangsu Key Laboratory for Environment Functional MaterialsSuzhou University of Science and TechnologySuzhou 215009China Biomedical Polymers Laboratoryand Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Biomedical Polymers Laboratory
and Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China
Two different structured boron sources have been used for the fabrication of LaB6 ceramics and their effects on the sintering temperature, microstructure and emission properties were investigated. The results show tha...
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Reduced graphene oxide/cadmium sulfide (RGO/CdS) hybrid material was synthesized by a one-step solvothermal method, wherein graphene oxide (GO) was a supporting material on which CdS nanoparticles were distributed hom...
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Reduced graphene oxide/cadmium sulfide (RGO/CdS) hybrid material was synthesized by a one-step solvothermal method, wherein graphene oxide (GO) was a supporting material on which CdS nanoparticles were distributed homogeneously, and cadmium acetate (Cd(Ac) 2 ·2H 2 O) was used as the CdS precursor. The supporting material RGO for CdS nanoparticles effectively enhanced their photocatalytic activities for the photodegradation of methylene blue in the aqueous solution. The optimum weight ratio of the GO to CdS in the hybrid material was 5.0%, which exhibited an excellent photodegradation efficiency (94%) and a better removal efficiency of total organic carbon (TOC) (57%), about 2.5 times and 5.1 times higher than that of pure CdS nanoparticles, respectively, under visible light (VL) irradiation. This improved photodegradation efficiency could be attributed to the increased adsorbability for methylene blue molecules, light absorption levels located in visible region, high charge transfer and separation ability, due to the introduction of a two-dimensional RGO network.
The structure, mechanical property and electronic structure of IrY alloy are investigated using the first-principles. The calculated equilibrium lattice parameter of the IrY is in good agreement with the experimental ...
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The structure, mechanical property and electronic structure of IrY alloy are investigated using the first-principles. The calculated equilibrium lattice parameter of the IrY is in good agreement with the experimental value. The calculated cohesive energy and enthalpies of formation is negative value, implies that the structure is stable at ground state. The electronic structure show that hybridization exist between Ir(5d76s2) state and Y(4s24p64d15s2) state and the form metallic Ir-Y bonds along the d-d direction. The calculated elastic modulus of IrY alloy represents high bulk modulus and shear modulus. However, this values of G/B (0.446) is close to brittleness-to-ductile (0.500), indicate that the IrY alloy exhibit brittleness behavior compare with the other Ir-Y alloys.
The full densification polycrystalline cerium hexaboride （CeB6） cathode material was prepared by using the spark plasma sintering （SPS） method in an oxygen free system. The starting precursor nanopowders with an a...
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The full densification polycrystalline cerium hexaboride （CeB6） cathode material was prepared by using the spark plasma sintering （SPS） method in an oxygen free system. The starting precursor nanopowders with an average grain size of 50 nm were prepared by high-energy ball milling. The ball-milled nanopowder was fully densified at 1550 °C under 50 MPa, which was about 350 °C lower than the conventional hot-pressing method and it was also lower than that of coarse powder under the same sintering condition. The mechanical properties of nanopowder sintered samples were significantly better than that of coarse powder, e.g., the flexural strength and Vickers hardness were 211% and 51% higher than that of coarse powder, respectively. The electron backscattered diffraction （EBSD） result showed that the （100） fiber texture could be fabricated by the ball-milled nanopowder sintered at 1550 °C and the thermionic emission current density was measured to be 16.04 A/cm2 at a cathode temperature of 1873 K.
The entanglement resonance in anisotropic spin-1/2 Heisenberg chains of different couplings is investigated when the nearest neighbor coupling is periodically modulated with external magnetic field. When the modulatio...
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The entanglement resonance in anisotropic spin-1/2 Heisenberg chains of different couplings is investigated when the nearest neighbor coupling is periodically modulated with external magnetic field. When the modulation frequency equals twice of the magnetic field, the entanglement resonance is larger than that at other modulation frequencies and decreases as the number of spins in the chain increases. When the modulation frequency equals the magnetic field, the entanglement resonance can be reduced to a quite low value by varying the coupling along z axis.
Ferroelectrics with optical and electro multifunction have great potential applications in future optoelectronic *** is as widely applied technological process in materials science that involves incorporating atoms or...
Ferroelectrics with optical and electro multifunction have great potential applications in future optoelectronic *** is as widely applied technological process in materials science that involves incorporating atoms or ions of appropriate elements into host lattices to yield hybrid materials with desirable properties and *** ferroelectric materials,doping is usually applied to modify electronic properties,modulating dielectric,ferroelectric,as well as piezoelectric ***,we examine the Pr3+ doped SrBi2Ta2O9 (SBT) bismuth layered ferroelectrics and demonstrate that a certain amount of Pr 3+ doped ceramic sample shows a red photoluminescence with blue excitation while simultaneously keeping a strong ferroelectric characteristics at room *** excitation spectra show that the samples have broad blue excitation *** this blue excitation the samples shows a red emission,corresponding to 1D2→3H4 *** blue band attribute to the f-f transitions from the 3H4 ground state to the 3PJ (J=0,1,2) excited states of Pr3+.The red emission excited under blue wavelength which covers the emission wavelength of the commercial blue LED chips,meaning that Pr doped SBT can be used as environmental friendly phosphors without using toxic mercury lamp (ultraviolet excitation source).In addition,SBT is an intrinsic dielectric and ferroelectric *** dielectric and ferroelectric properties were investigated in this *** a multifunctional materials,Pr doped SBT may be useful in sensor,future optical-electro integration and coupling devices.
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