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学者姓名：隋曼龄
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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 ：
Ciprofloxacin Ciprofloxacin Ibuprofen Ibuprofen Magnetic nanocomposite Magnetic nanocomposite Photodegradation Photodegradation Single metal atom oxide Single metal atom oxide
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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 ：
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 ：
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 ：
High resolution transmission electron microscopy High resolution transmission electron microscopy Hydrides Hydrides Hydrogen Hydrogen Precipitation (chemical) Precipitation (chemical) Scanning electron microscopy Scanning electron microscopy Titanium alloys Titanium alloys Titanium compounds Titanium compounds
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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 ：
In recent years, the photoelectronic conversion efficiency (PCE) of organic-inorganic halide perovskite solar cell (PSC) devices has been improved greatly. However, these devices are not very stable, and it is hard to avoid the effect of visible or ultraviolet (UV) light on the performance decay of the organic-inorganic halide perovskite devices, and there is rare report on the evolution process of the microstructure of PSCs under the light illumination, let along discussing on the different degradation mechanism of PSCs between the UV and visible light soaking. To address these scientific issues, in this study, we compared the performance evolution of CH3NH3PbI3 (MAPbI(3)) based PSCs during the UV and visible light irradiation. The experimental results show that the perovskite layer has been photodegraded from MAPbI3 into an amorphous phase under the white light LED soaking. Meanwhile, the migration of Au element from the electrode into the interface between MAPbI(3) and SnO2 layers can also be captured. As comparing the kinetics of redox reaction of Au, we found that the formation rate of Au nanoparticle mass in PSCs under UV light irradiation is almost 30 times higher than that under visible light illumination. Considering on the different characteristics of microstructure evolution in PSCs under the UV and visible light irradiation, and theoretically analyzing the energy level of each functional layers in the device, the results confirm that UV light is easy to be adsorbed by electron transportation layer (ETL) of SnO2 to excite the electron-hole pairs, while the photo-excited holes have a low energy level of -8.4 eV, which could oxidize the iodide ions (I-) into atomic iodine (I atom). The I atoms would diffuse into the spiro-OMeTAD layer and metal electrode interface. Due to its strong oxidation property, the I atom would not only destroy the spiro-OMeTAD layer, but also oxidize the Au metal electrode into AuI, which accelerated the generation of Au+. However, under the illumination of visible light, it is hard to excite the electron-hole pairs in SnO2, which prevents the damage on the functional interfaces, and the transportation energy barrier is unchanged. So, the open circuit voltage (V-oc) has a long-term photo-stability. However, the short-circuit current density (J(sc)) decreased rapidly under visible light illumination, which is mostly ascribed to the changes of charge mobility resulting from the migration of Au element and photodecomposition of MAPbI(3) layer. All these results give a new insight to understand the photo-instability of PSC.
关键词 ：
electron microscopy electron microscopy light illumination light illumination migration dynamics migration dynamics perovskite solar cell perovskite solar cell photo-degradation photo-degradation
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| GB/T 7714 | Lu, Yue , Ge, Yang , Sui, Manling . Different Degradation Mechanism of CH3NH3PbI3 Based Perovskite Solar Cells under Ultraviolet and Visible Light Illumination [J]. | ACTA CHIMICA SINICA , 2021 , 79 (3) : 344-352 . |
| MLA | Lu, Yue et al. "Different Degradation Mechanism of CH3NH3PbI3 Based Perovskite Solar Cells under Ultraviolet and Visible Light Illumination" . | ACTA CHIMICA SINICA 79 . 3 (2021) : 344-352 . |
| APA | Lu, Yue , Ge, Yang , Sui, Manling . Different Degradation Mechanism of CH3NH3PbI3 Based Perovskite Solar Cells under Ultraviolet and Visible Light Illumination . | ACTA CHIMICA SINICA , 2021 , 79 (3) , 344-352 . |
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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 ：
The electrochemical hydrogen evolution reaction (HER) in alkaline medium is of great significance for the conversion of renewable energy into hydrogen fuel. Most catalysts exhibit limited HER performance in alkaline electrolytes due to the inefficient dissociation of water to initiate the Volmer reaction. Herein, we report the atomically dispersed tungsten (W)-optimized MoP nanoparticles on N,P-doped graphene oxide (W0.25Mo0.75P/PNC) that possesses high activity with impressively low overpotentials (eta = 70 mV@10 mA cm(-2), eta = 49 mV@10 mA mg(cat.)(-1)) in alkaline medium. The catalyst features with the atomically isolated W atoms that can optimize the surface electronic structure by occupying the vacant Mo sites in the MoP lattice, corroborated by the X-ray absorption spectra, further leading to moderate hydrogen adsorption energy on the surface. The first-principles computation reveals that the atomically dispersed W atoms effectively reduce the water dissociation energy and facilitate the adsorption kinetics, leading to high activity. This work proposes an elegant design principle based on the pseudo-single-atom strategy to facilitate hydrogen electrocatalysis.
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| GB/T 7714 | Chen, Changli , Luo, Wenjia , Li, Haijing et al. Optimized MoP with Pseudo-Single-Atom Tungsten for Efficient Hydrogen Electrocatalysis [J]. | CHEMISTRY OF MATERIALS , 2021 , 33 (10) : 3639-3649 . |
| MLA | Chen, Changli et al. "Optimized MoP with Pseudo-Single-Atom Tungsten for Efficient Hydrogen Electrocatalysis" . | CHEMISTRY OF MATERIALS 33 . 10 (2021) : 3639-3649 . |
| APA | Chen, Changli , Luo, Wenjia , Li, Haijing , Hu, Tao , Zhao, Yizhou , Zhao, Zipeng et al. Optimized MoP with Pseudo-Single-Atom Tungsten for Efficient Hydrogen Electrocatalysis . | CHEMISTRY OF MATERIALS , 2021 , 33 (10) , 3639-3649 . |
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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 ：
deprotonation decomposition deprotonation decomposition humidity degradation humidity degradation hydration processes hydration processes perovskite solar cells perovskite solar cells surface termination surface termination
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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 ：
We have explored that the phase transition of colloidal perovskite CsPbI3 quantum dot (QD) during synthesis and purification processes are mainly induced by the increase of particle size (crystal growth). To stabilize the cubic structure, the metal cations Mn2+ and Zn2+ with smaller ion radius than that of Pb2+ were doped into the QD. These not only caused the lattice constriction and increased the Goldschmidt tolerance factor of perovskite structure, but also enhanced the Pb-I binding energy, all of which improve the tolerance of phase transition induced by the growth of crystal size during purification process. Besides, the doped QD solutions and films show fewer defects and lower trap density than those of the undoped samples, owing to the alleviation of lattice distortion. The results reveal that the Zn-doped and Mn-doped QD solar cells display power conversion efficiency of 13.5% and 12.0%, respectively, much higher than that of the control device.
关键词 ：
Doping Doping Perovskite quantum dots Perovskite quantum dots Phase transition Phase transition Solar cells Solar cells Structure stability Structure stability
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| GB/T 7714 | Huang, Xin , Hu, Jingcong , Bi, Chenghao et al. B-site doping of CsPbI3 quantum dot to stabilize the cubic structure for high-efficiency solar cells [J]. | CHEMICAL ENGINEERING JOURNAL , 2021 , 421 . |
| MLA | Huang, Xin et al. "B-site doping of CsPbI3 quantum dot to stabilize the cubic structure for high-efficiency solar cells" . | CHEMICAL ENGINEERING JOURNAL 421 (2021) . |
| APA | Huang, Xin , Hu, Jingcong , Bi, Chenghao , Yuan, Jifeng , Lu, Yue , Sui, Manling et al. B-site doping of CsPbI3 quantum dot to stabilize the cubic structure for high-efficiency solar cells . | CHEMICAL ENGINEERING JOURNAL , 2021 , 421 . |
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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 ：
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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