RARE METALS
·
2024
·Vol. 44
·期 3
·1577-1593
·
IF 9.6
Sun Gao-Xing,Zhu Bin,He Rui,Liang Qi-Dong,Jiang Sheng-Yu,Ren Yan,Pan Xiao-Xiao,Sun Yu-Qing,Lu Mi,Zhang Wen-Xian,Huang Cheng-Huan,Zhuang Shu-Xin
Although lithium-ion batteries are widely recognized as a new generation of energy storage devices, their large-scale application is severely hampered by their low energy density and restricted cyclic stability. Herein, an ingenious dual-modified interface, where the F-doping and fluorocarbon coating co-existed on Li[Ni 0.8 Co 0.1 Mn 0.1 ]O 2 surface, is rationally constructed to elevate its energy density and structural stability attributed to F − grafting between the bulk material and the coating utilizing a robust super-conformal fluorocarbon coating structural framework and more stable F-doped system under high charge/discharge cut-off voltage. In comparison with a single carbon-coated modified Li[Ni 0.8 Co 0.1 Mn 0.1 ]O 2 , the dual-modified sample overcomes the fatal disadvantage of carbon coating stripping during long-period cycles ascribed to the “TM-F-multifunctional coating” connector which firmly combines the bulk material with the coating with a strong interaction force, exhibiting a more stable-reversible structure and excellent comprehensive electrochemical performance under high cut-off voltage. Concomitantly, the F-transition metal bonds with stronger bond energies improve its structural reversibility during the processes of charge/discharge under high voltage. Furthermore, the fluorocarbon coating enhances its charge transfer ability and effectively restrains the interfacial side reactions. Additionally, the climbing nudged elastic band methodology is used to calculate the diffusion energy barrier of lithium-ions in the matrix material, which confirms the fundamental reason for its superior lithium-ion diffusion ability. The high pseudocapacitance contribution ratio is perfectly explained by calculating the adsorption capacity on the surface of the dual-modified sample. Consequently, experiments and theoretical calculations unequivocally confirm its distinguished electrochemical properties under high cut-off voltage. Graphical
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高影响因子
RARE METALS
·
2022
·Vol. 41
·期 6
·1880-1888
·
IF 6.318
Zhou Yu,Niu Peng-Hu,Li Zhong-Hua,Zhang Pan-Pan,Su Ming-Ru,Dou Ai-Chun,Li Xiao-Wei,Liu Yun-Jian
Modification of Si anode with various coating matrixes is a promising strategy to resolve the unstable solid electrolyte interphase issues. However, the complex preparation process and inherently weak interaction between Si and other matrixes impede its practical application. Inspired by the metallurgical process of aluminum, an aluminosilicate matrix was prepared as coating layer on the surface of Si nanoparticles after heat treatment. Si nanoparticles with a uniform native oxide layer were used as seed crystals for the adsorption of aluminum hydroxide. The strong symbiosis and bond between alumina and silica, such as mullite (3Al 2 O 3 ·2SiO 2 ) or kaolin (Al 2 O 3 ·SiO 2 ·2H 2 O), provide homogeneous and durable contact coating layer. The as-produced Si/SiO 2 ·Al 2 O 3 composite delivers a charge capacity of 1440 mAh·g −1 at 100 mA·g −1 and remains 879 mAh·g −1 at 3 A·g −1 . After 200 cycles, the capacity retention remains high at 76%. The enhanced properties were ascribed to SiO 2 ·Al 2 O 3 synergistic composite coating layer, which could hinder the interfacial side chemical reaction and buffer volume change of Si. Graphical abstract
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2023
·Vol. 50
·期 1
·107-125
·
IF 3.3
Huo Quan,Zhang Xiaolin,Fu Yanfei,Zhao Jiayao,Fu Lei,Miao Jiarun,Sun Haihui,Gao Jing,Liu Suyan
In this work, CuCo@C and CuCoS@C derived from an in-situ synthesis bi-metallic MOF HKUST-1/ZIF-67 (CuCo-MOF) were successfully fabricated by calcination and hydrothermal sulfide strategies. Morphology characterization results indicated that ZIF-67 grew uniformly on the surface of HKUST-1 to form CuCo-MOF. And, benefiting from bi-metallic MOFs precursors, the formed derivatives inherited and possessed good textural properties and dispersing well metal sites, which facilitated diffusions of molecules and enhancements of catalytic performances. In addition, carbon matrix produced in the materials further accelerated electron transporting properties, boosting HER and OER activities. Accordingly, in electrolytic water evaluations, CuCo@C and CuCoS@C showed good HER and OER performance, achieving 97 mV and 180 mV of overpotential at 10 mA cm −2 in an alkaline medium, respectively. Additionally, the catalysts exhibit long-term stabilities. Thus, this study provides a rational way for designing and constructing of high-efficient catalysts for H 2 and O 2 generations from electrolytic water processes.
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高影响因子
FIBERS AND POLYMERS
·
2025
·
IF 2.3
Luo Xiaoying,Yang Jun,Chen Jiang,Ling Xianzu,Jiang Jiayi,Lu Hao,Wan Yizao,Zhang Quanchao
Thermal-responsive shape-memory polymer fibers represent a promising candidate for controllable local drug delivery systems. In this study, we developed thermo-responsive shape-memory fibrous membranes through electrospinning and UV cross-linking, utilizing a blend of poly(p-dioxanone) (PPDO) and poly(ε-caprolactone) (PCL), which were loaded with doxorubicin (DOX). Scanning electron microscopy (SEM) characterization revealed the formation of three types of electrospun fibrous membranes with fiber diameters measuring 1.8 ± 0.4, 3.0 ± 0.7, and 3.7 ± 1.8 μm, designated as PDC-S, PDC-M, and PDC-L, respectively. The results indicated that the chains of PPDO and PCL are crosslinked by UV irradiation through benzophenone and triallyl isocyanurate. Specifically, PPDO functions as hard segments while PCL serves as switching segments. Further investigation demonstrated that the PDC-M membrane exhibited optimal performance with approximately 90% shape fixity ratio and around 82% recovery ratio alongside favorable mechanical properties. After programming, PDC-M displayed controllable drug release behavior capable of releasing DOX in a two-step manner under thermal stimulation. Consequently, they showed significantly enhanced antitumor efficacy along with improved drug-utilization efficiency. Therefore, the PDC membranes prepared through simple blending and UV crosslinking exhibit the desired shape-memory effect, demonstrating significant potential for local antitumor drug delivery applications.
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高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2023
·Vol. 148
·期 22
·12629-12637
·
IF 4.4
Luo Chen,Liu Huiqing,Li Xiang,Dong Xiaohu,Zhang Yaqian,Wang Haitao
The thermal conversion properties of crude oil play a crucial role in the efficient extraction of oil and subsequent combustion propulsion during in situ combustion (ISC). Instead, the thermal conversion of crude oil varies greatly among conditions owing to clay minerals influence within the reservoir. In this work, we comprehensively investigated the combined impact of clay minerals on the thermal conversion behavior of oxidized oil and pyrolyzed oil. The results indicated that different clay minerals demonstrated discrepancies in their catalytic activity toward oxidized oil. Among the clay minerals, kaolinite had a measurably influence on the relative reaction rate of 100 ℃ oxidized oil, furthermore, it would facilitate the oxidized oil fuel deposition. Montmorillonite played a catalytic role in elevating the thermal conversion of 120 ℃ oxidized oil and 350 ℃ pyrolyzed oil, promoting easier high temperature oxidation of 120 ℃ oxidized oil. Illite as well increased comparative reaction rate of the HTO phase of 140 ℃ oxidized oil. Moreover, the activation energy of the reaction in different temperature intervals decreased due to the existence of clay minerals, with chlorite exerting the most pronounced effect on the activation energy in the 100–350 ℃ temperature interval. The powerful adsorption and acidic catalytic interaction of clay minerals were particularly efficient, with pyrolytic reforming of pyrolyzed oil containing montmorillonite being the optimum, which facilitated the volatilization and oxidation reactions of light fraction under low temperature conditions. The thermal catalytic contribution of clay minerals in the storage formation should be taken into account in ISC field applications.
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高影响因子
Science China-Materials
·
2023
·Vol. 66
·期 5
·1820-1828
·
IF 8.1
Zhao Lei,Sun Qijiao,Li Mao,Zhong Yafei,Shen Peiqi,Lin Yunxiang,Xu Kun
Perovskite oxides with flexible compositions and electronic structures have great potential for application in electrocatalytic water oxidation reactions. However, few studies have focused on the application of perovskite oxides in electrocatalytic oxidation reactions of organic molecules, probably due to the absence of active species because of the poor conductivity and high energy barrier of the surface reconstruction. Herein, we report Cu 3 N nanosheets with a typical antiperovskite structure as electrocatalysts for selectively converting methanol to formate. The as-prepared antiperovskite nitride Cu 3 N samples exhibit a Faradic efficiency exceeding 90% for methanol to formate over a wide potential range, which was further confirmed by online electrochemical mass spectrometry and in situ infrared reflectance absorption spectroscopy. Moreover, the high-resolution transmission electron microscopy, X-ray absorption spectroscopy, and in situ Raman spectroscopy results indicate that the core-shell structure formed by generating surface Cu(II) species triggers the electrocatalytic methanol oxidation reaction activity, whereas the pristine Cu 3 N core facilitates the electron transport inside the catalyst during the electrocatalytic process. This study provides a modelable scheme for the highly selective conversion of methanol and introduces a novel nonoxide perovskite material for the electrochemical conversion of small-organic molecules.
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高影响因子
Science China-Materials
·
2023
·Vol. 66
·期 9
·3565-3572
·
IF 8.1
Wu Jingbo,Gao Yanan,Duan Wanchun,Du Xianting,Yu Zhi-Peng,Xu Kun
Designing the interface structure in metal-supported catalysts has been a central challenge in realizing the high efficiency of selective catalysis. Herein, we demonstrate that interfacial charge redistribution at the interface of heterostructured PdNi&Ni 3 N enables selective catalytic hydrogenation of nitrobenzene into azo compounds. Contrarily, the PdNi alloy alone catalyzes the conversion of nitrobenzene into aniline, and the Ni 3 N support was almost powerless to catalyze the hydrogenation of nitrobenzene under the same conditions. Interfacial charge redistribution at the interface of PdNi&Ni 3 N, as evidenced by the X-ray photon spectroscopy results and theoretical calculations, results in a change in the adsorption energy of the organic reaction intermediates, thus altering the hydrogenation reaction pathway to achieve selective production of azo compounds. We believe that this study not only highlights the importance of interface structure in selective catalytic hydrogenation reactions but also inspires more scientific interest in heterostructured metal (alloy)/transition metal nitrides catering to the field of catalysis.
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高影响因子
Food Analytical Methods
·
2024
·Vol. 17
·期 4
·564-573
·
IF 2.6
Duan Yunxuan,Zhang Jing,Jiang Zhilin,Lan Jingsha,Weng Xiaoqi,Zhao Minhui,Chen Jing,Zuo Yong
In this work, based on the degradation of rhodamine B (RhB) and rhodamine 6G (R6G) with the catalysis of MnO 2 nanosheets (MnO 2 NSs) under acidity condition, a colorimetric and fluorescence dual signal sensor array was developed for Baijiu discrimination. Rhodamine B and rhodamine 6G present characteristic UV-vis absorption peaks and fluorescence emission peaks at specific wavelength. MnO 2 NSs could induce the degradation of rhodamine B and rhodamine 6G and weaken the intensity of UV-vis and fluorescence. In the presence of organic acids or Baijiu, the degradation of dyes accelerated and the optical signal could be further weakened. Owing to the various of acidity, the sensor array exhibited different responses to organic acids and Baijiu, resulting in unique fingerprint maps. With the method, 8 kinds of organic acids and formic acid-acetic acid mixture samples were successfully recognized. In addition, 12 kinds of Baijiu with different flavor types were identified with 100% accuracy. Notably, 5 other distilled liquors were also successfully discriminated with no misclassifications. The method not only reduces the amount of dyes, but also improves the specificity of the sensor array, demonstrating the potential application prospects of the dual signal sensor array in Baijiu industry.
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高影响因子
Journal of Coatings Technology and Research
·
2023
·Vol. 21
·期 1
·341-354
·
IF 2.3
Zhang Xueke,Chen Kaimin,Li Ziwei,Zhang Qianqian,Xu Chenming,Chang Yue,Wen Shaoguo
Cationic polyacrylate latex has attracted extensive attention due to its special properties and potential applications in wood primers, metal coatings, and fabric treatments, etc. However, cationic polyacrylate latex has poor durability and stability, which limits its use in practical applications. In this study, a functional cationic monomer (3-chloro-2-hydroxypropyl) dimethyl [2-[(2-methyl-1-oxoallyl)oxy]ethyl] ammonium chloride (DEAC) was combined with two conventional monomers of methyl methacrylate (MMA) and butyl acrylate (BA) to prepare cationic polyacrylate latex by a semi-continuous emulsion polymerization. The obtained latexes showed typical cationic character with zeta potential in the range of + 40 to + 65 mV. The effect of DEAC on the stability of latex was studied and good alkali resistance could be gained at high DEAC content. Water resistance and mechanical properties of the film before and after crosslinking are studied in detail. The results showed that the water absorption reduced from 60.04% to a minimum of 9.18%, and the tensile strength increased from 3.9 to 8.4 MPa, which was comparable to solvent-based polyacrylate films. This work provides a new strategy for the preparation of waterborne cationic polyacrylate latex with improved water resistance and good mechanical properties, etc., which can be applied in papermaking, textiles, wood primers, and other potential fields. Graphical abstract
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高影响因子
TRIBOLOGY LETTERS
·
2024
·Vol. 72
·期 1
·1-11
·
IF 2.9
Yang Chao,Hu Kehui,Xie Guoxin,Yang Guo,Zhang Lin,Kang Jiajie
The lubricating material near the friction area plays a crucial role for many friction components. In this study, utilizing the advantages of 3D printing layer-by-layer accumulation, a lubricating layer containing microcapsules was constructed on the surface of the matrix to achieve active lubrication on-demand. It was found that using on-demand lubrication printing scheme allowed equal amounts of microcapsules to provide superior lubrication compared to integral lubrication. The coefficient of friction (COF) of the composites with on-demand lubrication was reduced to 0.08, with a decrease of 89.6%, compared to the uniform distribution of the conventional lubricant, with no significant reduction in the compressive strength and a reduction in the wear rate by two orders of magnitude; The on-demand lubricated composite has a friction coefficient as low as 0.057 and a compressive strength of about 160 MPa when destroyed. It was demonstrated that the part containing microcapsules on the surface acted as a lubricant, and the part without microcapsules acted as load-bearing. Therefore, the composite material had good mechanical properties and excellent self-lubricating ability. This study pioneered the application of microcapsules in light-curing 3D printing, compared the effects of various printing schemes and different additions of microcapsules added into the photosensitive resins, and provided ideas for the preparation of friction parts with better overall performance.
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高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 41
·期 7
·1115-1122
·
IF 3.815
Zhong Chan-Na,Liu Ya-Dong,Tang Juan,Chen Wei-Shuo,Li Shuang-Cheng,Shao Jun,Hou Hao-Qing
Blending of poly(levorotatory-lactic acid) (PLLA) and poly(dextrorotatory-lactic acid) (PDLA) produces the stereocomplex crystallites (PLA SC), which present higher melting temperature and mechanical properties than that of neat PLLA or PDLA. However, in the PLLA/PDLA blends with higher molecular weights, the phase separation occurs and the SC exhibits weak memory after melting, which lead to a small amount of SC together with a large amount of homochiral crystallites (HC) develop during crystallization from the melt. In this study, a small content of graphite oxide was blended with PLLA and PDLA to form ternary blends, and it was exciting to find that the formation of SC was enhanced gradually with the content of graphite oxide. The SC exclusively developed when 2 wt% graphite oxide was incorporated into the PLLA/PDLA, and the crystallinity with ∼50% was received even during fast cooling from the melt (−50 °C/min). The acceleration formation of SC was speculated due to the interaction between PLA molecular chains and the hydroxyl groups on the surface of graphite oxide and the obstruction of proliferation of graphite oxide.
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高影响因子
FIBERS AND POLYMERS
·
2023
·Vol. 24
·期 10
·3373-3384
·
IF 2.5
Hu Xinyi,Kong Que,Li Rong,Zhou Change,Li Zhiguang
Making a multifunctional hydrogel-based wound dressing is a long-term research goal. Therefore, it is of great significance to develop an ideal wound dressing with desirable biocompatibility, adhesive property, antibacterial property and simple production. Herein, molecular network crosslinking hydrogels were achieved through the nucleophilic addition of polyphenol-sulfur radical using tannic acid and thioctic acid as matrix. The multifunctional tannic–thioctic acid (TATA) hydrogels with excellent rheological properties were prepared by further modification of antibacterial and hydrophobic properties. The successful cross-linking of the molecules was confirmed by infrared spectroscopy, Raman spectroscopy and energy dispersive X-ray spectroscopy (EDX). Complex hydrogels had certain hydrophobic properties, which can slowly absorb wound tissue fluid and keep the wetness of the wound. In addition, the hydrogel had good rheological, antibacterial and antioxidant properties, and also improved blood clotting effect and biocompatibility. These results indicated that TATA hydrogel had the potential prospect to be used as a novel wound dressing for a wide range of medical applications. Graphical abstract
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高影响因子
危险品化学品经营许可证（带存储）