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您的检索式：作者名="Shifeng Ge"
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| 1 | In situ preparation of g-C3N4/Bi4O5I2 complex and its elevated photoactivity in Methyl Orange degradation under visible light显示文摘A graphite carbon nitride(g-C3N4)modified Bi4O5I2 composite was successfully prepared insitu via the thermal treatment of a g-C3N4/Bi OI precursor at 400°C for 3 hr.The as-prepared g-C3N4/Bi4O5I2 showed high photocatalytic performance in Methyl Orange(MO)degradation under visible light.The best sample presented a degradation rate of 0.164 min^-1,which is 3.2 and 82 times as high as that of Bi4O5I2 and g-C3N4,respectively.The g-C3N4/Bi4O5I2 was characterized by X-ray powder diffractometer(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),Raman,X-ray photoelectron spectroscopy(XPS),ultraviolet-visible diffuse reflectance spectra(DRS),electrochemical impedance spectroscopy(EIS)and transient photocurrent response in order to explain the enhanced photoactivity.Results indicated that the decoration with a small amount of g-C3N4 influenced the specific surface area only slightly.Nevertheless,the capability for absorbing visible light was improved measurably,which was beneficial to the MO degradation.On top of that,a strong interaction between g-C3N4 and Bi4O5I2 was detected.This interplay promoted the formation of a favorable heterojunction structure and thereby enhanced the charge separation.Thus,the g-C3N4/Bi4O5I2 composite presented greater charge separation efficiency and much better photocatalytic performance than Bi4O5I2.Additionally,g-C3N4/Bi4O5I2 also presented high stability.·O2^- and holes were verified to be the main reactive species. | Zhe Feng Lin Zeng Qingle Zhang Shifeng Ge Xinyue Zhao Hongjun Lin Yiming He | 2020 | Journal of Environmental Sciences2020，32，1： | 12 |
| 2 | Designing new work-hardenable ductile Ti-based multilayered bulk metallic glass composites with ex-situ and in-situ hybrid strategy显示文摘To overcome the trade-off between the devisable micro structure and the excellent tensile ductility of bulk metallic glass composites(BMGCs),a novel ex-situ and in-situ hybrid strategy is successfully proposed to design a series of the work-hardenable ductile Ti-based multilayered BMGCs(ML-BMGCs).The asprepared ML-BMGCs,consisting of α-phases,β-phases and amorphous phases,exhibit a controllable multilayered structure of the Ti layers and the amorphous layers with alternative distribution.The size and volume fraction of the crystalline phases are tuned by Nb microalloying.It is found that the ML-BMGCs possess a suitable size and volume fraction of the crystalline phases when Nb microalloying content are5%(at.) or 8%(at.),and they obtain an optimum combination of the specific strength of 243 MPa g kg-1 or 216 MPa g kg-1,and tensile plasticity of 4.33%±0.1 % or 5.10%±0.1%.The deformation mechanism of the as-prepared ML-BMGCs during tension is also revealed.The ex-situ Ti layers and in-situ dendrites together effectively serve as absorbers to suppress the propagation of shear bands and multiply shear bands.And the defo rmation of ex-situ α-Ti phases by dislocation slip and the transformation from in-situ metastable β-Ti phase to orthorhombic α-Ti during tension impart significant work-hardening capability to the ML-B MGCs.The present study provides a guidance of developing novel high-performance BMGCs with a controllable micro structure. | Shifeng Lin Zhengwang Zhu Shaofan Ge Long Zhang Dingming Liu Yanxin Zhuang Huameng Fu Hong Li Aimin Wang Haifeng Zhang | 2020 | Journal of Materials Science & Technology2020，47，15： | 1 |
| 3 | High-temperature Mechanical Properties and Dynamic Recrystallization Mechanism of in situ Silicide-reinforced MoNbTaTiVSi Refractory High-entropy Alloy Composite显示文摘The hypoeutectic composite material composed of BCC phase and in situ precipitated Ti_(5)Si_(3) was prepared by adding Si into MoNbTaTiV high-entropy alloy.The obvious oriented in situ Ti_(5)Si_(3) phase formed eutectic phase with BCC phase in the inter-dendritic area,which leads to excellent properties of the composite.The alloy exhibits ultra-high yield stress of 718 MPa at 1200℃ and obvious compression plasticity.After reaching the maximum strength,dynamic recovery(DRV)and dynamic recrystallization(DRX)caused soften phenomena.The DRX mechanism of the dual-phase eutectic structure is analyzed by electron backscatter diffraction.The DRX of the BCC phase conforms to the discontinuous DRX and continuous DRX mechanisms,while the Ti_(5)Si_(3) phase has a geometric DRX mechanism in addition to the above two mechanisms.The high performance of this composite has enough potential high-temperature applications such as nuclear and aero engine. | Shaofan Ge Shifeng Lin Huameng Fu Long Zhang Tieqiang Geng Zhengwang Zhu Zhengkun Li Hong Li Aimin Wang Hongwei Zhang Haifeng Zhang | 2022 | Acta Metallurgica Sinica(English Letters)2022，35，10： | 1 |
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