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铁基改性樟树叶复合材料的制备及吸波性能

安徽大学学报（自然科学版） 2024年第4期48卷 36-43页

作者：恽志强郑赣鸿董浩琪李承肖林翔安徽大学材料科学与工程学院安徽合肥230601

生物炭材料因高的电导率而具有吸收电磁波的潜在优异性能,但其吸收性能的提高受阻抗失配制约.为了解决此问题,通常在生物炭材料中加入磁性材料,以提高吸波性能.通过简单的浸渍和烧结,制备铁基生物炭(樟树叶)复合材料.研究结果表明:相对... 详细信息

生物炭材料因高的电导率而具有吸收电磁波的潜在优异性能,但其吸收性能的提高受阻抗失配制约.为了解决此问题,通常在生物炭材料中加入磁性材料,以提高吸波性能.通过简单的浸渍和烧结,制备铁基生物炭(樟树叶)复合材料.研究结果表明:相对于其他6种铁基生物炭复合材料,该文制备的铁基生物炭复合材料具有较强的综合吸波性能.

关键词：电磁波吸收生物炭铁基化合物樟树叶磁损耗

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Core–Shell Structure and Luminescence of SrMoO_4:Eu^(3+)(10%) Phosphors

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Journal of Materials Science & Technology 2016年第12期32卷 1361-1371页

作者： Yanan Zhu ganhong zheng Zhenxiang Dai Lingyun Zhang Jingjing Mu Anhui Key Laboratory of Information Materials and Devices School of Physics and Materials ScienceAnhui University

SrMoO4：Eu^3＋（10%） phosphors were produced via hydrothermal synthesis and *** systematically analyzed how the morphology and luminescence properties of the phosphors were affected by the synthesis conditions,including the p H of the precursor solution,stirring speed,and postsintering *** samples synthesized at p H = 8 and 9 were spindle-like rods with a core-shell *** the stirring speed increased to Vs = 150 r/min,the core-shell structure *** measurements indicated that the Sr Mo O4：Eu^3＋samples under ultraviolet radiation produced strong red emission centered at 616 *** luminescence properties were greatly affected by the p H,stirring during hydrothermal reaction,and use of *** related mechansim is discussed.

关键词： SrMoO4 Core-sheIlstructure Eu^3+-doped Luminescence

Photocatalytic and Luminescent Properties of SrMoO_4 Phosphors Prepared via Hydrothermal Method with Different Stirring Speeds

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Journal of Materials Science & Technology 2017年第1期33卷 23-29页

作者： Yanan Zhu ganhong zheng Zhenxiang Dai Lingyun Zhang Yongqing Ma Anhui key Laboratory of Information Materials and Devices School of Physics and Materials Science Anhui University Hefei 230039 China

To probe the potential utilities in the photocatalyst and luminescent materials, a series of SrMoO4 samples have been prepared via the hydrothermal preparation with different stirring speeds. These SrMoO4 samples were characterized using X-ray diffraction analysis, scanning electron microscopy, UV-diffuse reflection spectroscopy （UV-vis）. It has been found that the lattice parameters and [MOO4] tetrahedmn distortion of SrMoO4 samples are increased with the increased stirring speed in the process of bydrothermal preparation. By changing the stirring speeds, spindle and succulent-like morphologies have been obtained. UV-vis results show that the band gaps of SrMoO4 samples are sensitive to the stirring speed. As for the luminescent and photocatalytic properties, our experimental results clearly suggest that, compared with those samples without stirring, the luminescent and photocatalytic activities are enhanced with stirring in the hydrothermal preparation. The photodegradation of methyl blue （MB） over SrMoO4 system increases from 30% to 50%; with stirring, which may be related to small band gaps and porous surfaces. Our results indicate that stirring may he one important technique to improve the photocatalytic properties, especially in the process of hydrothermal method.

关键词： SrMoO4 Stirring Hydrothermal synthesis Luminescence Photocatalytic activity

NiCr_(2)O_(4)化合物的磁相变临界行为

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安徽大学学报（自然科学版） 2024年第5期48卷 42-46页

作者：张名锋曹睿阳斯一凡戴振翔郑赣鸿安徽大学材料科学与工程学院安徽合肥230601 安徽大学物理与光电工程学院安徽合肥230601

采用标准固相法制备NiCr_(2)O_(4),并对其结构、磁性能和磁相变临界行为进行研究.研究结果表明:NiCr_(2)O_(4)具有尖晶石结构;当温度低于居里温度TC时,随着磁场强度增加,磁化强度趋于饱和;当温度高于TC,随着磁场强度增加,磁化强度线性增... 详细信息

采用标准固相法制备NiCr_(2)O_(4),并对其结构、磁性能和磁相变临界行为进行研究.研究结果表明:NiCr_(2)O_(4)具有尖晶石结构;当温度低于居里温度TC时,随着磁场强度增加,磁化强度趋于饱和;当温度高于TC,随着磁场强度增加,磁化强度线性增加,NiCr_(2)O_(4)呈顺磁特征;长程和短程铁磁相互作用共存于NiCr_(2)O_(4).

关键词： NiCr_(2)O_(4) 二级相变临界行为居里温度

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Nitrogen-doped TiO_(2)/Graphene Composites Synthesized via the Vapour-thermal Method

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Journal of Wuhan University of Technology(Materials Science) 2022年第6期37卷 1105-1113页

作者： TANG Hailong WANG Min JU Tangtong DAI Yue WANG Meiling MA Yongqing zheng ganhong School of Materials Science and Engineering Anhui UniversityHefei 230039China School of Physics and Optoelectronic Engineering Anhui UniversityHefei 230039China Institute of Physical Science and Information Technology Anhui UniversityHefei 230039China

TiO_(2)/graphene composite was synthesized in the vapor environment of *** order to improve the properties of composite,N-doped of TiO_(2)/graphene with different N/Ti molar ratio was prepared in the vapor environment of deionized water and used urea as the source of *** N-doped occupies in the interstitial sites of TiO_(2) lattice,substitutes for O element in TiO_(2) and for C element in graphene,and simultaneously changes the chemical states of Ti and O elements in TiO_(2).N-doped changes the morphology of TiO_(2) from nano-sheets to nanoparticles,accompanying with the decrease in specific surface area of the composites,first increases the particle size of TiO_(2) and then decreases,and alters the vibration modes of *** composite with RN/Ti=2 exhibits the enhanced photocatalytic degradation performance to methylene blue,and the degradation rate increases from 7.7×10^(−2) min^(−1) for the undoped composite to 9.6×10^(−2) min^(−1).

关键词： TiO_(2)/graphene vapor-thermal nitrogen-doped photocatalytic performance

Fermi level unpinning achievement and transport modification in Hf_(1-x)Yb_(x)O_(y)/Al_(2)O_(3)/GaSb laminated stacks by doping engineering

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Journal of Materials Science & Technology 2022年第26期121卷 130-139页

作者： Lin Hao Gang He Shanshan Jiang Zhenxiang Dai ganhong zheng Jinyu Lu Lesheng Qiao Jingbiao Cui School of Materials Science and Engineering Anhui UniversityHefei230601China School of Integration Circuits Anhui UniversityHefei230601China School of Physics and Optoelectronics Engineering Anhui UniversityHefei230601China Department of Physics University of North TexasDentonTX76203USA

Fermi level pinning and interface instability have hindered the achievement of field-effect-transistors(FETs)with high *** passivation and doping engineering technology have become the main driving force to solve the ***,interface chemistry and transport characteristics determination of Hf_(1-x)Yb_(x)O_(y)/Al_(2)O_(3)/GaSb gate stacks have been achieved by passivation and doping process.X-ray photoelectron spectroscopy characterization and electrical measurements have demonstrated the existence of less intrinsic oxides and elemental Sb at Hf_(1-x)Yb_(x)O_(y)/Al_(2)O_(3)/GaSb interface with optimized doping content,as well as the minimum leakage current density of 2.23×10^(5)A *** energy distribution of interface state based on conductance method has confirmed the achievement of the lowest interface state density of 1.98×10^(13)e Vcm,resulting in Fermi level *** transport mechanisms of Hf_(1-x)Yb_(x)O_(y)/Al_(2)O_(3)/GaSb MOS capacitors as a function of temperature have been investigated systematically and some important electrical parameters have been *** analyses show that sputtering-derived Hf_(1-x)Yb_(x)O_(y)/Al_(2)O_(3)/GaSb(x=0.32)gate stack has potential application in future Ga Sbbased metal-oxide-semiconductor field effect transistor(MOSFET)devices.

关键词： Fermi level pinning High-k gate dielectrics Field effect transistor Electrical transport mechanism Doping

The Enhanced Electrons and Holes Separation for Bi2MoO6/TiO2 Z-scheme Heterojunction by Ag Loading

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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 996-1002页

作者：阮辰亮 WANG Wei 戴振翔郑赣鸿 School of Physics and Materials Science Anhui University School of Physics and Optoeletronics Engineering Anhui University

The Bi2Mo O6/Ti O2and Bi2Mo O6/Ag/Ti O2composites were solvothermally synthesized and characterized by X-ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS),and (high resolution)transmission electron microscopy ((HR)TEM).The Bi2Mo O6/Ti O2and Bi2Mo O6/Ag/Ti O2composites exhibited higher photocatalytic activity than pure Bi2Mo O6.100%of the Rh B dye molecules could be decomposed over Bi2Mo O6/Ag/Ti O2composite in 120 *** enhanced photocatalytic activity of Bi2Mo O6/Ti O2and Bi2Mo O6/Ag/Ti O2composite was attributed to the efficient separation of photoinduced electrons and *** mechanism for the enhanced photocatalytic activity is discussed.

关键词： photocatalysis Ag heterojunction Bi 2 MoO 6 /TiO 2 photocatalytic activity

Thermoelectric properties of Sr_(0.9)La_(0.1)TiO_3 and Sr_(2.7)La_(0.3)Ti_2O_7 with 15% Ag addition

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Journal of Rare Earths 2014年第4期32卷 314-319页

作者：李翰博郑赣鸿戴振翔袁振亨王海秋马永青 Anhui Key Laboratory of Information Materials and Devices School of Physics and Material ScienceAnhui University

15%Ag-added cubic perovskites Sr0.9La0.1TiO3 and Ruddlesden-Popper （RP） phases Sr2.7La0.3Ti2O7 were fabricated via hydrothermal synthesis, cold pressing and high-temperature sintering. The structure and thermoelectric properties were also investi-gated for all samples. The results indicated that Ag precipitated as a second phase. Ag addition made electrical conductivity and ab-solute Seebeck coefficient enhanced, as a result, the ZT values were enhanced both for two series. Compared with cubic perovskite, RP phase was subjected to smaller impact by Ag addition. The reasons for enhancing ZT value and the different impact for two series by Ag addition were also discussed.

关键词： ceramics crystal structure Ag-added thermal conductivity electrical properties rare earths

The Enhanced Electrons and Holes Separation for Bi_(2)MoO_(6)/Ag/TiO_(2)Z-scheme Heterojunction by Ag Loading

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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 996-1002页

作者： RUAN Chenliang WANG Wei DAI Zhenxiang zheng ganhong School of Physics and Materials Science Anhui UniversityHefei 230039China School of Physics and Optoeletronics Engineering Anhui UniversityHefei 230039China

The Bi_(2)MoO_(6)/TiO_(2)and Bi_(2)MoO_(6)/Ag/TiO_(2)composites were solvothermally synthesized and characterized by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),and(high resolution)transmission electron microscopy((HR)TEM).The Bi_(2)MoO_(6)/TiO_(2)and Bi_(2)MoO_(6)/Ag/TiO_(2)composites exhibited higher photocatalytic activity than pure Bi_(2)MoO_(6).100%of the Rh B dye molecules could be decomposed over Bi_(2)MoO_(6)/Ag/TiO_(2)composite in 120 *** enhanced photocatalytic activity of Bi_(2)MoO_(6)/TiO_(2)and Bi_(2)MoO_(6)/Ag/TiO_(2)composite was attributed to the efficient separation of photoinduced electrons and *** mechanism for the enhanced photocatalytic activity is discussed.

关键词： photocatalysis Ag heterojunction Bi_(2)MoO_(6)/Ag/TiO_(2) photocatalytic activity