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Low temperature synthesis of high-entropy(Y_(0.2)Yb_(0.2)Sm_(0.2)Eu_(0.2)Er_(0.2))_(2)O_(3)nanofibers by a novel electrospinning method

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Journal of Materials Science & Technology 2022年第8期103卷 215-220页

作者： yan xing Wenqing Dan Yicun Fan xing’ao Li New Energy Technology Engineering Lab of Jiangsu Province School of ScienceNanjing University of Posts&Telecommunications(NUPT)Nanjing 210023China

High-entropy ceramics(HECs)show outstanding properties such as amorphous-like thermal conductivities,colossal dielectric constant,superionic conductivity,enhanced electromagnetic wave absorption ability,super hardness and strength,which are promising for structural and functional ***,the high synthesis temperature has become the bottleneck that hinders the scale-up production and practical applications of *** is thus appealing to develop a novel low-temperature process for the synthesis of *** demonstrate the feasibility of low-temperature synthesis,herein,an electrospinning method has been utilized,for the first time,for the synthesis of high-entropy(Y_(0.2)Yb_(0.2)Sm_(0.2)Eu_(0.2)Er_(0.2))_(2)O_(3)*** has been found that after electrospinning from liquid precursors single phase(Y_(0.2)Yb_(0.2)Sm_(0.2)Eu_(0.2)Er_(0.2))_(2)O_(3) solid solution with bixbyite structure can be formed by calcining at a temperature as low as 500℃,which is at least about 1000℃ lower than that used in the solid-state synthesis *** as-prepared(Y_(0.2)Yb_(0.2)Sm_(0.2)Eu_(0.2)Er_(0.2))_(2)O_(3) nanofibers are continuous and uniform with a smooth surface and a small diameter of 150 *** is also intriguing that the average grain size of(Y_(0.2)Yb_(0.2)Sm_(0.2)Eu_(0.2)Er_(0.2))_(2)O_(3) is only about 10 nm,which is much smaller than that in the solid-state synthesized *** addition,all the elements are homogeneously distributed along the *** work demonstrates that high-entropy ceramic nanofibers can be synthesized from liquid precursors at low temperatures through a simple,efficient,and low-cost electrospinning method,which opens up a new avenue for the low-temperature synthesis of HECs.

关键词： High-entropy ceramics Nanofibers Electrospinning Rare earth metal oxides Synthesis

A novel 2D graphene oxide modified α-AgVO_(3) nanorods: Design, fabrication, and enhanced visible-light photocatalytic performance

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Journal of Advanced Ceramics 2022年第2期11卷 308-320页

作者： Jian WU Liangyu LI xing-ao LI Xin MIN yan xing New Energy Technology Engineering Lab of Jiangsu Province School of ScienceNanjing University of Posts&Telecommunications(NUPT)Nanjing 210023China Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China

Silver vanadates are promising visible-light-responded photocatalysts with suitable bandgap for solar ***,the easy recombination of photogenerated carriers limits their *** overcome this obstacle,a novel 2D graphene oxide(GO)modifiedα-AgVO_(3) nanorods(GO/α-AgVO_(3) )photocatalyst was designed herein to improve the separation of *** GO/α-AgVO_(3) was fabricated through a facile in-situ coprecipitation method at room *** was found that the as-prepared 0.5 wt%GO/α-AgVO_(3) exhibited the most excellent performance for rhodamine B(RhB)decomposition,with an apparent reaction rate constant 18 times higher than that of pureα-AgVO_(3) under visible-light *** light of the first-principles calculations and the hetero junction analysis,the mechanism underpinned the enhanced photocatalytic performance was *** enhanced photocatalytic performance was ascribed to the appropriate bandgap ofα-AgVO_(3) nanorods for visible-light response and efficient separation of photocarriers through GO *** work demonstrates the feasibility of overcoming the easy recombination of photogenerated carriers and provides a valuable GO/α-AgVO_(3) photocatalyst for pollutant degradation.

关键词： α-AgVO_(3) graphene oxide modifiedα-AgVO_(3)nanorods(GO/α-AgVO_(3)) photocatalysis graphene oxide(GO)nanosheets in-situ coprecipitation processing

Transcriptome analysis of adherens junction pathway-related genes after peripheral nerve injury

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Neural Regeneration Research 2018年第10期13卷 1804-1810页

作者： Sheng Yi xing-Hui Wang Ling-yan xing Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education Co-innovation Center of NeuroregenerationNantong University

The neural regeneration process is driven by a wide range of molecules and pathways. Adherens junctions are critical cellular junctions for the integrity of peripheral nerves. However, few studies have systematically characterized the transcript changes in the adherens junction pathway following injury. In this study, a rat model of sciatic nerve crush injury was established by forceps. Deep sequencing data were analyzed using comprehensive transcriptome analysis at 0, 1, 4, 7, and 14 days after injury. Results showed that most individual molecules in the adherens junctions were either upregulated or downregulated after nerve injury. The m RNA expression of ARPC1 B, ARPC3, TUBA8, TUBA1 C, CTNNA2, ACTN3, MET, HGF, NME1 and ARF6, which are involved in the adherens junction pathway and in remodeling of adherens junctions, was analyzed using quantitative real-time polymerase chain reaction. Most of these genes were upregulated in the sciatic nerve stump following peripheral nerve injury, except for CTNNA2, which was downregulated. Our findings reveal the dynamic changes of key molecules in adherens junctions and in remodeling of adherens junctions. These key genes provide a reference for the selection of clinical therapeutic targets for peripheral nerve injury.

关键词： peripheral nerve regeneration crushed sciatic nerve RNA-seq adherens junctions remodeling of adherens junctions Venn diagram ingenuity pathway analysis differentially expressed genes comprehensive transcript analysis transcriptomics heatmap neural regeneration

Synthesis and Crystal Structure of K_3[HO{VO(O_2)_2}_2]·H_2O

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Chinese Journal of Structural Chemistry 2004年第11期23卷 1252-1255页

作者： ZHANGHong-yan HUANGZun-xing GUOHong-Xu DepartmentofChemistry FuzhouUniversityFuzhou350002China

The title compound K3[HO{VO(O2)2}2]H2O has been synthesized and its crystal structure was determined by X-ray diffraction method. The crystal is of monoclinic, space group P21/c with a = 6.7078(3), b = 9.9539(6), c = 15.8182(9) ? = 93.702(3), V = 1053.96(10) ?, Mr = 414.20, Dc = 2.610 g/cm3, Z = 4, ?(MoKa) = 0.71073 ? F(000) = 808, = 3.014 mm-1, the final R = 0.0173 and wR = 0.0466 for 2178 observed reflections with I > 2s(I). X-ray diffraction reveals that the coordination polyhedra of V atoms are not chemically equivalent: the V(1) and V(2) polyhedra can be described as pentagonal pyramid and pentagonal bipyramid, respectively.

关键词： peroxovanadate synthesis crystal structure

Effects of built-in electric field and donor impurity on linear and nonlinear optical properties of wurtzite InxGa1-xN/GaN nanostructures

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Chinese Physics B 2020年第8期29卷 479-484页

作者： Xiao-Chen yang yan xing School of Physical Science and Technology Inner Mongolia UniversityHohhot 010021China

The linear and nonlinear optical absorption coefficients(ACs)and refraction index changes(RICs)of 1s-1p,1p-1d,and 1f-1d transitions are investigated in a wurtzite InxGa1-xN/GaN core-shell quantum dot(CSQD)with donor impurity by using density matrix *** effects of built-in electric field(BEF),ternary mixed crystal(TMC),impurity,and CSQD size are studied in *** finite element method is used to calculate the ground and excited energy state energy and wave *** results reveal that the BEF has a great influence on the linear,nonlinear,and total ACs and *** presence of impurity leads the resonant peaks of the ACs and RICs to be blue-shifted for all transitions,especially for 1s-1p *** is also found that the resonant peaks of the ACs and RICs present a red shift with In-composition decreasing or core radius ***,the amplitudes of the ACs and RICs are strongly affected by the incident optical *** absorption saturation is more sensitive without the impurity than with the impurity,and the appearance of absorption saturation requires a larger incident optical intensity when considering the BEF.

关键词： core-shell quantum dot linear and nonlinear optical properties impurity ternary mixed crystal

Research on the energy evolution characteristics and the failure intensity of rocks

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International Journal of Mining Science and Technology 2020年第5期30卷 705-713页

作者： Lin Gao Feng Gao Zhizhen Zhang yan xing School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhou 221116China State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China

It is pretty challenging and difficult to quantitatively evaluate the intensity of dynamic disasters in deep mining *** on the uniaxial loading-unloading experiments for five types of rocks,this paper investigated the energy evolution characteristics,and identified the damage and crack propagation ***,the fragment size distributions of the rocks after failure were *** energy release rate(Ge)and energy dissipation rate(Gd)were then proposed to describe the change of energies per unit volume and per unit *** demonstrated that the more brittle rocks had the shorter stage of unstable crack growth and the lower induced damage at crack damage *** evolution characteristics of the strain energy rates can be easily identified by the crack propagation *** failure intensity index(FId),which equals to the values of Ge/Gd at the failure point,was further put *** can account for the brittleness of the rocks,the intensity of rock failure as well as the degree of rock *** was revealed that a higher FId corresponded to a lower fractal dimension and stronger dynamic failure.

关键词： Energy evolution Crack propagation thresholds Damage Energy release rate Energy dissipation rate Failure intensity

Direct electrospinned La2O3 nanowires decorated with metal particles: Novel 1 D adsorbents for rapid removal of dyes in wastewater

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Journal of Materials Science & Technology 2020年第10期42卷 84-91页

作者： yan xing Jing Cheng Jian Wu Mengfei Zhang xing-ao Li Wei Pan New Energy Technology Engineering Lab of Jiangsu Province School of ScienceNanjing University of Posts£r Telecommunications(NUPT)Nanjing 210023China State Key Laboratory of New Ceramic and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Inorganic nanocomposites have attracted continuous attention as low cost and eco-friendly ***,low adsorption rate and poor cycle performance limit their further ***,lanthanum oxide(LO)ceramic nanowires decorated with nickel nanoparticles(NiNPs)have been synthesized by a facile electrospinning *** decomposition of polymer precursor left high pore volume in the resultant ceramic nanowires,giving the nanowires a high surface *** NiNPs-LO nanowires can remove various dye contaminants with adsorption rate constant higher than most *** importantly,the NiNPs-LO nanowires can be separated and reused conveniently with stable cyclic performance,avoiding not only energy consumption but also secondary *** adsorption performance fits well with pseudo-second-order and Langmuir isothermal model,indicating a monolayer adsorption *** with structural and FT-IR analysis,the excellent adsorption ability is mainly ascribed to the electron interaction between the composite interfaces and contaminates under the assistance of high surface area and *** work provides an ideal recyclable adsorbent for the ultra-fast water purification.

关键词： Nanocomposites Adsorption Nanowires Water purification

Synthesis and characterization of novel ternary deep eutectic solvents

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Chinese Chemical Letters 2014年第1期25卷 104-106页

作者： Yu-Ting Liu yan-An Chen yan-Jun xing Key Laboratory of Science & Technology of Eco-Textile (Donghua University) Ministry of Education College of Chemistry Chemical Engineering and BiotechnologyDonghua University

A series of room-temperature ternary deep eutectic solvents （TDESs） were prepared from imidazolium halides, zinc halides and amides. The [BMIM]Cl-ZnCl2-acetamide （1：1：1） system shows the lowest freezing point （-60℃） and lowest density in the series. The viscosity and conductivity of TDESs have an exponential relationship with temperature and can be fitted by Arrhenius equation.

关键词： Ternary deep eutectic solvents Room-temperature Synthesis Physical properties

Discussion of Garfinkle-Horowitz-Strominger Dilaton Black Hole Entropy

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Communications in Theoretical Physics 2009年第7期52卷 189-192页

作者： WANG Chun-yan GUI Yuan-xing School of Physics and Optoelectronic Technology Dalian University of Technology Dalian 116024 China

We discuss the entropy of the Garfinkle-Horowitz-Strominger dilaton black hole by using the thin film brick-wall model, and the entropy obtained is proportional to the horizon area of the black hole confirming the Bekenstein-Hawking＇s area-entropy formula. Then, by comparing with the original brick-wall method, we find that the result obtained by the thin film method is more reasonable avoiding some drawbacks, such as little mass approximation, neglecting logarithm term, and taking the term L^3 as a contribution of the vacuum surrounding the black hole, and the physical meaning of the entropy is more clearer.

关键词： Garfinkle-Horowitz-Strominger dilaton black hole thin film brick-wall model entropy