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学者姓名：隋曼龄
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摘要 ：
An ??-Fe ??? ??-Fe phase transformation occurs in iron when the shock loading pressure exceeds 13 GPa, but all the ??-Fe will reverse back to ??-Fe during unloading, resulting in no residual ??-Fe in the unloaded samples. To prove the occurrence of this process, a series of microstructural characterization techniques were used to study the microstructures of shock-loaded iron, but hard to reach a consensus on the experimental results. Here, by using two conventional electron microscopy techniques, electron backscattered diffraction (EBSD) in scanning electron microscopy and selected area electron diffraction (SAED) in transmission electron microscopy, we reveal six novel phase transformation variants directly related to the reversible phase transformation. On this basis, the essential differences of microstructure between deformation area and phase transformation area are revealed. Further, we propose two fast and efficient methods which can identify the occurrence of the reversible phase transformation by EBSD and SAED, respectively. The universality of these methods has been verified in different shock loading experiments in iron.
关键词 ：
EBSD EBSD ?-Fe??-Fe reversible phase transformation ?-Fe??-Fe reversible phase transformation Phase transformation variants Phase transformation variants Deformation twins Deformation twins Shock-loaded iron Shock-loaded iron
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| GB/T 7714 | Yu, Mingchao , Guo, Zhenxi , Meng, Xin et al. Direct approaches to distinguishing deformation and phase transformation structures in shock-loaded iron [J]. | MATERIALS CHARACTERIZATION , 2022 , 194 . |
| MLA | Yu, Mingchao et al. "Direct approaches to distinguishing deformation and phase transformation structures in shock-loaded iron" . | MATERIALS CHARACTERIZATION 194 (2022) . |
| APA | Yu, Mingchao , Guo, Zhenxi , Meng, Xin , Chen, Yongtao , Yu, Jidong , Sui, Manling . Direct approaches to distinguishing deformation and phase transformation structures in shock-loaded iron . | MATERIALS CHARACTERIZATION , 2022 , 194 . |
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摘要 ：
Metallic MoS2 (i.e., 1T-MoS2) is considered as the most promising precious-metal-free electrocatalyst with outstanding hydrogen evolution reaction (HER) performance in acidic media comparable to Pt. However, sluggish kinematics of HER in alkaline media and its inability for the oxygen evolution reaction (OER), hamper its development as bifunctional catalysts. The instability of 1T-MoS2 further impedes its applications for scaling up, calling an urgent need for simple synthesis to produce stable 1T-MoS2. In this work, the challenge of 1T-MoS2 synthesis is first addressed using a direct one-step hydrothermal method by adopting ascorbic acid. 1T-MoS2 with flower-like morphology is obtained, and transition metals (Ni, Co, Fe) are simultaneously doped into 1T-MoS2. Ni-1T-MoS2 achieves an enhanced bifunctional catalytic activity for both HER and OER in alkaline media, where the key role of Ni doping as single atom is proved to be essential for boosting HER/OER activity. Finally, a Ni-1T-MoS2||Ni-1T-MoS2 electrolyzer is fabricated, reaching a current density of 10 mA cm(-2) at an applied cell voltage of only 1.54 V for overall water splitting.
关键词 ：
(2) (2) overall water splitting overall water splitting bifunctional electrocatalysts bifunctional electrocatalysts hydrothermal synthesis hydrothermal synthesis 1T-MoS 1T-MoS doping doping
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| GB/T 7714 | Wang, Guowei , Zhang, Guikai , Ke, Xiaoxing et al. Direct Synthesis of Stable 1T-MoS2 Doped with Ni Single Atoms for Water Splitting in Alkaline Media [J]. | SMALL , 2022 , 18 (16) . |
| MLA | Wang, Guowei et al. "Direct Synthesis of Stable 1T-MoS2 Doped with Ni Single Atoms for Water Splitting in Alkaline Media" . | SMALL 18 . 16 (2022) . |
| APA | Wang, Guowei , Zhang, Guikai , Ke, Xiaoxing , Chen, Xiangyu , Chen, Xu , Wang, Yueshuai et al. Direct Synthesis of Stable 1T-MoS2 Doped with Ni Single Atoms for Water Splitting in Alkaline Media . | SMALL , 2022 , 18 (16) . |
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摘要 ：
Designing highly efficient photocatalysts is significantly important to degrade the harmful pollutions in water. In this study, photocatalyst of Fe3O4-ED-rGO with dissolved HPV was successfully prepared and electron microscopy characterization revealed that large number of single tungsten/vanadium atom oxide (ST/VAO) was homogeneously deposited on Fe3O4 nanoparticles in SMAO-MrGO-ED sample and occupied the bivalent Fe2+ sites. Meanwhile, phase analysis confirmed that the Fe3O4 nanocomposites were mostly conversed from the reducted Fe2O3 by the hydrolysis of rGO-ED-HPV. Such a highly dispersed monatomic adsorption on the bivalent Fe2+ of polycrystalline SMAO-MrGO-ED nanocomposite not only benefits for the visible light absorption from 2.7 eV to 2.10 eV, but also offers abundantly active sites to get the highest activity of 98.43% and 98.12% for ciprofloxacin (CF) and ibuprofen (IBF) photodegradation, respectively. All these discoveries give us a new insight to design the photocatalysts with high photodegradation efficiency, low cost, short reaction time and good reusability.
关键词 ：
Ibuprofen Ibuprofen Magnetic nanocomposite Magnetic nanocomposite Single metal atom oxide Single metal atom oxide Photodegradation Photodegradation Ciprofloxacin Ciprofloxacin
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| GB/T 7714 | Selvakumar, Karuppaiah , Wang, Yueshuai , Lu, Yue et al. Single metal atom oxide anchored Fe3O4-ED-rGO for highly efficient photodecomposition of antibiotic residues under visible light illumination [J]. | APPLIED CATALYSIS B-ENVIRONMENTAL , 2022 , 300 . |
| MLA | Selvakumar, Karuppaiah et al. "Single metal atom oxide anchored Fe3O4-ED-rGO for highly efficient photodecomposition of antibiotic residues under visible light illumination" . | APPLIED CATALYSIS B-ENVIRONMENTAL 300 (2022) . |
| APA | Selvakumar, Karuppaiah , Wang, Yueshuai , Lu, Yue , Tian, Bohai , Zhang, Zeyu , Hu, Jingcong et al. Single metal atom oxide anchored Fe3O4-ED-rGO for highly efficient photodecomposition of antibiotic residues under visible light illumination . | APPLIED CATALYSIS B-ENVIRONMENTAL , 2022 , 300 . |
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摘要 ：
The growth of plasma electrolytic oxidation (PEO) coating at initial stages is relevant directly with coating's morphologies and properties. In this work, the PEO coating on Al was carried out at a constant current model in an electrolyte containing sodium silicate and potassium hydroxide. The morphology, the phase compositions and the structures of initial stages PEO coatings were examined by detailed microstructural characterization. The result showed the PEO coating anodizing <11 s exhibited typical characteristics of the parallel-sided pores and the concave Al/coating boundary, with a significant temperature rising. After that, the dielectric breakdown occurred, resulting in many micron-size pores formed in the PEO coating. When anodizing time over 15 s, the gas discharge appeared at the coating/electrolyte interface. A plasma-modified layer was found composed of gamma-Al2O3 nanoparticles and amorphous materials covering the coating surface to prevent the coating from being breakdown by electrons in the plasma. After 10 min, the PEO coating transforms into the typical porous ceramic PEO coating. This study is helpful in the design of the new functional surface of the PEO coating, as well as the deep understand of the coating growth mechanism.
关键词 ：
Aluminum Aluminum Anodic films Anodic films Growth mechanism Growth mechanism Plasma electrolytic oxidation Plasma electrolytic oxidation TEM TEM
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| GB/T 7714 | Zhu, Lujun , Ke, Xiaoxing , Li, Jingwei et al. Growth mechanisms for initial stages of plasma electrolytic oxidation coating on Al [J]. | SURFACES AND INTERFACES , 2021 , 25 . |
| MLA | Zhu, Lujun et al. "Growth mechanisms for initial stages of plasma electrolytic oxidation coating on Al" . | SURFACES AND INTERFACES 25 (2021) . |
| APA | Zhu, Lujun , Ke, Xiaoxing , Li, Jingwei , Zhang, Yuefei , Zhang, Zhenhua , Sui, Manling . Growth mechanisms for initial stages of plasma electrolytic oxidation coating on Al . | SURFACES AND INTERFACES , 2021 , 25 . |
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摘要 ：
Since titanium has high afnity for hydrogen and reacts reversibly with hydrogen, the precipitation of titanium hydrides in titanium and its alloys cannot be ignored. Two most common hydride precipitates in α-Ti matrix are γ-hydride and δ-hydride, however their mechanisms for precipitation are still unclear. In the present study, we find that both γ-hydride and δ-hydride phases with different specific orientations were randomly precipitated in the as-received hot forged commercially pure Ti. In addition, a large amount of the titanium hydrides can be introduced into Ti matrix with selective precipitation by using electrochemical treatment. Cs-corrected scanning transmission electron microscopy is used to study the precipitation mechanisms of the two hydrides. It is revealed that the γ-hydride and δ-hydride precipitations are both formed through slip + shuffle mechanisms involving a unit of two layers of titanium atoms, but the difference is that the γ-hydride is formed by prismatic slip corresponding to hydrogen occupying the octahedral sites of α-Ti, while the δ-hydride is formed by basal slip corresponding to hydrogen occupying the tetrahedral sites of α-Ti. © 2021
关键词 ：
Hydrides Hydrides Hydrogen Hydrogen Titanium compounds Titanium compounds High resolution transmission electron microscopy High resolution transmission electron microscopy Scanning electron microscopy Scanning electron microscopy Titanium alloys Titanium alloys Precipitation (chemical) Precipitation (chemical)
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| GB/T 7714 | Li, Jingwei , Li, Xiaocui , Sui, Manling . Formation mechanism of hydride precipitation in commercially pure titanium [J]. | Journal of Materials Science and Technology , 2021 , 81 : 108-116 . |
| MLA | Li, Jingwei et al. "Formation mechanism of hydride precipitation in commercially pure titanium" . | Journal of Materials Science and Technology 81 (2021) : 108-116 . |
| APA | Li, Jingwei , Li, Xiaocui , Sui, Manling . Formation mechanism of hydride precipitation in commercially pure titanium . | Journal of Materials Science and Technology , 2021 , 81 , 108-116 . |
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摘要 ：
Interfacial structure evolution and degradation are critical to the electrochemical performance of LiCoO2 (LCO), the most widely studied and used cathode material in lithium ion batteries. To understand such processes requires precise and quantitative measurements. Herein, we use well-defined epitaxial LCO thin films to reveal the interfacial degradation mechanisms. Through our systematical investigations, we find that surface corrosion is significant after forming the surface phase transition layer, and the cathode electrolyte interphase (CEI) has a double layer structure, an inorganic inner layer containing CoO, LiF, LiOH/Li2O and Li x PF y O z , and an outmost layer containing Li2CO3 and organic carbonaceous components. Furthermore, surface cracks are found to be pronounced due to mechanical failures and chemical etching. This work demonstrates a model material to realize the precise measurements of LCO interfacial degradations, which deepens our understanding on the interfacial degradation mechanisms.
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| GB/T 7714 | Qin, Changdong , Wang, Le , Yan, Pengfei et al. LiCoO2 Epitaxial Film Enabling Precise Analysis of Interfacial Degradations [J]. | CHINESE PHYSICS LETTERS , 2021 , 38 (6) . |
| MLA | Qin, Changdong et al. "LiCoO2 Epitaxial Film Enabling Precise Analysis of Interfacial Degradations" . | CHINESE PHYSICS LETTERS 38 . 6 (2021) . |
| APA | Qin, Changdong , Wang, Le , Yan, Pengfei , Du, Yingge , Sui, Manling . LiCoO2 Epitaxial Film Enabling Precise Analysis of Interfacial Degradations . | CHINESE PHYSICS LETTERS , 2021 , 38 (6) . |
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摘要 ：
Among the twinning modes in hexagonal close-packed (HCP) metals, the mechanism for {11 (2) over bar2}< 11 (2) over bar(3) over bar > mode is particularly confusing and controversial. In the literature reports, there are three possible second invariant planes, i.e. the K-2 planes for {11 (2) over bar2}< 11 (2) over bar(3) over bar > twinning mode: {11(2)over bar>(4) over bar} which has been widely accepted and corresponds to a three-layer zonal twinning dislocation; {11 (2) over bar(2) over bar} that is deemed unfavorable; and (0002) which has only been observed in atomistic simulations and corresponds to a single-layer twinning dislocation. {11 (2) over bar(4) over bar} was predicted by classical twinning theory and the experimentally measured magnitude of twinning shear s in titanium and zirconium seemed to agree well with the prediction. However, {11 (2) over bar(4) over bar} has never been verified in simulations which show that (0002) should be the K-2 plane. This conflict has not been resolved due to the lack of experimental observation of the structure of twinning dislocations. In this work, scanning transmission electron microscopy (STEM) observations are conducted to resolve the twin boundary structure in deformed pure titanium on the atomic scale, combined with atomistic simulations. Atomic resolution STEM unambiguously shows that the twinning dislocation only involves a single twinning plane and the K-2 plane is (0002), which is consistent with the atomistic simulations. The STEM results also reveal a half-shear-half-shuffle process which is manifested by a unique twin boundary structure generated by the glide of single-layer twinning dislocations. To explain these results, the lattice correspondences of all three K-2 planes are examined in great detail. In particular, shear and shuffle required in the lattice transformations are analyzed inside the framework of classical theory. These analyses explain well why (0002) is the more favorable K-2 plane than {11(2)over bar>(4) over bar} and {11 (2) over bar(2) over bar}, and properly resolve the conflict between the prediction of the classical twinning theory and the simulation results. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词 ：
Lattice correspondence Lattice correspondence Twin boundary Twin boundary Twinning dislocation Twinning dislocation
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| GB/T 7714 | Li, Jingwei , Sui, Manling , Li, Bin . A half-shear-half-shuffle mechanism and the single-layer twinning dislocation for {11(2)over-bar2}< 11(2)over-bar(3)over-bar > mode in hexagonal close-packed titanium [J]. | ACTA MATERIALIA , 2021 , 216 . |
| MLA | Li, Jingwei et al. "A half-shear-half-shuffle mechanism and the single-layer twinning dislocation for {11(2)over-bar2}< 11(2)over-bar(3)over-bar > mode in hexagonal close-packed titanium" . | ACTA MATERIALIA 216 (2021) . |
| APA | Li, Jingwei , Sui, Manling , Li, Bin . A half-shear-half-shuffle mechanism and the single-layer twinning dislocation for {11(2)over-bar2}< 11(2)over-bar(3)over-bar > mode in hexagonal close-packed titanium . | ACTA MATERIALIA , 2021 , 216 . |
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摘要 ：
Theoretical studies have shown that surface terminations, such as MAI or PbI layers, greatly affect the environmental stability of organic-inorganic perovskite. However, until now, there has been little effort to experimentally detect the existence of MAI or PbI terminations on MAPbI3 grains, let alone disclose their effects on the humidity degradation pathway of perovskite solar cell. Here, we successfully modified and detected the surface terminations of MAI and PbI species on polycrystalline MAPbI3 films. MAI-terminated perovskite film followed the moisture degradation process from MAPbI3 to hydrate MAPbI3 ⋅H2 O and then into PbI2 , with penetration of water molecules being the main driving force leading to the degradation of MAPbI3 layer by layer. In contrast, for the PbI-terminated perovskite film in a humid atmosphere, a deprotonation degradation pathway was confirmed, in which the film preferentially degraded directly from MAPbI3 into PbI2 , here the iodine defects played a key role in promoting the dissociation of water molecules into OH- and further catalyzing the decomposition of perovskite.
关键词 ：
perovskite solar cells perovskite solar cells humidity degradation humidity degradation deprotonation decomposition deprotonation decomposition surface termination surface termination hydration processes hydration processes
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| GB/T 7714 | Lu Yue , Si Zhixiang , Liu Hongpeng et al. In CH3 NH3 PbI3 Perovskite Film, the Surface Termination Layer Dominates the Moisture Degradation Pathway. [J]. | Chemistry , 2021 , 27 (11) : 3729-3736 . |
| MLA | Lu Yue et al. "In CH3 NH3 PbI3 Perovskite Film, the Surface Termination Layer Dominates the Moisture Degradation Pathway." . | Chemistry 27 . 11 (2021) : 3729-3736 . |
| APA | Lu Yue , Si Zhixiang , Liu Hongpeng , Ge Yang , Hu Jingcong , Zhang Zeyu et al. In CH3 NH3 PbI3 Perovskite Film, the Surface Termination Layer Dominates the Moisture Degradation Pathway. . | Chemistry , 2021 , 27 (11) , 3729-3736 . |
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摘要 ：
本工作实验对比了可见光以及紫外光辐照下甲氨碘化铅(CH_3NH_3PbI_3即MAPbI_3)基钙钛矿太阳能电池器件性能及微结构演变特征差异.结果表明可见光辐照下钙钛矿太阳能电池器件中MAPb I3层发生降解的同时,伴随着Au元素从金属电极一侧向MAPb I3和电子传输层SnO_2的界面处迁移现象.但相较于紫外光,可见光辐照下器件中Au元素的迁移速率慢30倍左右.这是由于器件电子传输层SnO_2具有较低的价带顶位置(-8.4 eV),它吸收紫外光激发出强氧化性的空穴h~+,氧化碘离子I~-生成I原子.而I原子会对金属电极层产生较大的破坏作用,促进Au~+离子的形成.因此可见光辐照下,尽管器件开...
关键词 ：
电子显微学 电子显微学 迁移动力学 迁移动力学 光辐照 光辐照 钙钛矿太阳能电池 钙钛矿太阳能电池 光降解 光降解
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| GB/T 7714 | 卢岳 , 葛杨 , 隋曼龄 . 白光及紫外光辐照下甲氨碘化铅基钙钛矿太阳能电池降解机制差异 [J]. | 化学学报 , 2021 , 79 (03) : 344-352 . |
| MLA | 卢岳 et al. "白光及紫外光辐照下甲氨碘化铅基钙钛矿太阳能电池降解机制差异" . | 化学学报 79 . 03 (2021) : 344-352 . |
| APA | 卢岳 , 葛杨 , 隋曼龄 . 白光及紫外光辐照下甲氨碘化铅基钙钛矿太阳能电池降解机制差异 . | 化学学报 , 2021 , 79 (03) , 344-352 . |
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摘要 ：
Capturing the photolysis process of archetypal perovskite materials (such as methylammonium lead triiodide, MAPbI(3)) into metallic Pb-0 is fundamentally important to understand the photodegradation pathway of organic-inorganic hybrid perovskites (OIHPs). In this study, the photodecomposition pathway of a MAPbI(3) film in an atmospheric argon (Ar) gas environment was quasi-in situ studied comprehensively. Under light illumination, the decomposition of the perovskite film is first triggered at the grain boundaries, along with an obvious generation of metallic lead (Pb-0) nanoparticles. Then, the degradation sites extend into the inner MAPbI(3) grains. By calculating the growth kinetics of the Pb-0 enriched nanoparticles, we can find that it strictly obeys an interfacial diffusion-controlled growth model. Atomic resolution high angle annular dark-field (HAADF) characterization confirms that the Pb-0 enriched nanoparticles are with Pb@PbI2-x (x approximate to 0.4) core-shell structures, while the interface between crystalline MAPbI(3) and amorphous PbI2-x controls the photodegradation pathway of perovskite films. To the best of our knowledge, this is the first time to directly observe the photolysis process of perovskite films in a practical environment (Ar gas and light illumination), particularly with nano or even atomic-scale resolution. Furthermore, the discovery of the interfacial-controlled photodegradation pathway of MAPbI(3) into amorphous PbI2-x and then into Pb@PbI2-x aggregates has never been elucidated before.
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| GB/T 7714 | Lu, Yue , Hu, Jingcong , Ge, Yang et al. Decisive influence of amorphous PbI2-x on the photodegradation of halide perovskites [J]. | JOURNAL OF MATERIALS CHEMISTRY A , 2021 , 9 (26) : 15059-15067 . |
| MLA | Lu, Yue et al. "Decisive influence of amorphous PbI2-x on the photodegradation of halide perovskites" . | JOURNAL OF MATERIALS CHEMISTRY A 9 . 26 (2021) : 15059-15067 . |
| APA | Lu, Yue , Hu, Jingcong , Ge, Yang , Tian, Bohai , Zhang, Zeyu , Sui, Manling . Decisive influence of amorphous PbI2-x on the photodegradation of halide perovskites . | JOURNAL OF MATERIALS CHEMISTRY A , 2021 , 9 (26) , 15059-15067 . |
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