CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Dequan Jiang,Ting Wen,Yanzhen Guo,Jie Liang,Zimin Jiang,Chen Li,Ke Liu,Wenge Yang,Yonggang Wang
Anomalous compression behaviors such as negative linear compressibility (NLC) and negative area compressibility (NAC) are emerging functionalities essential for utilities under extreme conditions. Metal–organic frameworks (MOFs) present a large family of NLC/NAC materials under the well-recognized “wine-rack” mechanism. Nevertheless, the working pressure of MOFs is limited to typically no more than 3 GPa. Herein, we report the observation of a rare reentrant NLC behavior of MIL-53(Al) over an ultrawide pressure region up to 41.6 GPa. MIL-53(Al) with the classic wine-rack topology first exhibits an NLC behavior along the c-axis in the pressure region of 0–2.7 GPa, followed by a normal compression process between 2.7 and 12.9 GPa. After that, it is surprising to find that the reentrant NLC property remains at a record-high pressure (>40 GPa) among the previously reported MOFs. The mechanisms of the distinct compression behaviors of MIL-53(Al) in the three stages are studied by combining the X-ray diffraction analyses, Raman spectra, and DFT calculation. Particularly, the photoluminescence of Cr3+ is used as a unique probe for the subtle changes of the local coordination environments of Al3+ under compression. Both the absorption spectra and photoluminescence of Cr3+-doped MIL-53(Al) not only verify the three-stage compression processes but also reveal a hidden structural/electrical phase transition around 22.0 GPa. These findings provide an in-depth understanding of the structure–property relationship of abnormal compression behavior at the local-structure level.
研究领域:
材料科学
·
高压物理
·
无机化学
·
金属有机框架（MOFs）
·
凝聚态物理
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DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2013
·Vol. 29
·期 8
·1804-1808
·
IF 0.869
WANG Shun-Kui,LI Zhi-Jie,XIAO Xue-Zhang,FAN Xiu-Lin,CHEN Zhi-Wen,LI Shou-Quan,GE Hong-Wei,CHEN Li-Xin
The Na-Al-H complex hydride was prepared by reactive ball milling (NaH/Al+CeCl3) and (NaH/Al+CeCl3/yKH) (y=0.02, 0.04) composites under a hydrogen pressure of 3 MPa at room temperature, using NaH and Al powder as raw materials, as well as 2% (molar
fraction) CeCl3 and 2% CeCl3/y% KH (y=0.02, 0.04) as dopant, respectively. The de-/hydrogenation properties show that the addition of KH can effectively improve the dehydrogenation kinetics of second decomposition step for Na-Al-H system. The (NaH/Al+CeCl3/0.02KH)
composite can complete dehydrogenation process within 20 min at 170, with good de-/hydrogenation cycling performance at relatively low temperature (100-140). Calculation by Kissenger method shows that the addition of KH could decrease the apparent activation energy of second decomposition
step for Na-Al-H system, resulting in the decrease of desorption peak temperatures. Phase structure analysis shows that the enhanced second step dehydrogenation kinetics of Na-Al-H composite system is mainly ascribed to the lattice volume expansion of Na3AlH6 resulted
from the addition of KH.
研究领域:
材料科学
·
氢能存储
·
固态化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Wen Jiang Zheng,Ning An,Jian Hai Yang,Jinxiong Zhou,Yong Mei Chen
Tough Al-alginate/poly(N-isopropylacrylamide) (PNIPAM) hydrogel has been synthesized by introducing an interpenetrating network with hybrid physically cross-linked alginate and chemically cross-linked PNIPAM. Varying the concentration of AlCl3 regulates the mechanical properties of the tough hydrogel and tunes its lower critical solution temperature (LCST) as well. The tough Al-alginate/PNIPAM exhibits 6.3 ± 0.3 MPa of compressive stress and 9.95 of uniaxial stretch. Tunability of LCST is also achieved in a wide range within 22.5–32 °C. A bending beam actuator and a four-arm gripper made of bilayer (Na-alginate/PNIPAM)/(Al-alginate/PNIPAM) hydrogel as prototype of all-hydrogel soft robotics are demonstrated. A finite element (FE) simulation model is developed to simulate the deformation of the soft robotics. The FE simulation not only reproduces the deformation process of performed experiments but also predicts more complicated devices that can be explored in the future. This work broadens the application of temperature-responsive PNIPAM-based hydrogels.
研究领域:
材料科学
·
软体机器人
·
聚合物水凝胶
·
刺激响应材料
·
生物医学工程
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DOI
高影响因子
Food Additives & Contaminants Part B-Surveillance
·
2024
·
IF 2.5
Ping Wang,Gexiang Zhang
This study conducted a dietary exposure assessment of chloropropanols and aluminium, after quantifying their content in food. The mean dietary exposure to Al from total grain products was found to be 6.4E–04 mg/kg bw/week, not exceeding the provisional tolerable weekly intake (PTWI). The results showed that the mean dietary exposure of 3-monochloro-1,2-propanediol (3-MCPD) from grain products was higher than the tolerable daily intake (TDI). Deterministic evaluations showed that the mean HQ of 1.5 to Al from fried dough twist was higher than 1. However, the HI values to Al were lower than 1 and the Monte Carlo simulation (MCS) showed that the HQ was greater than 1 at the 99% exposure level. Deterministic and probabilistic methods indicated that HQ values of 3-MCPD from grain products were above 1, whereas the mean HI value was 0.62.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Xiaoxia Ma,Changcheng Bao,Lin Shi,Junzhe Xu,Wei Liu,Jimin Han,Li Yang
Al/CuO nanothermite films are prone to cracks/gaps that alter combustion behavior. This study investigates nanothermite films with engineered gaps, focusing on particle advection. Using high-speed microscopy (70,000 fps, submicron resolution), we find gaps induce a “V-shaped” reaction front, boosting the combustion rate by 6-fold (929 vs. 153.8 mm/s for gap-free films). Maximum enhancement occurs at gaps of 0–200 μm, where molten Al 2 O 3 /Cu particles (~4.8 μm in diameter, ~7 m/s in velocity) traverse the gaps to ignite unreacted regions, acting as the primary driver for accelerated combustion. Beyond 200 μm, enhancement diminishes as particles solidify upon cooling to the phase transition temperature, rebound upon reaching the opposite side, and ultimately cause ignition failure. A condensation model with experimental parameters as input explains this phenomenon: Al 2 O 3 solidifies within the 200 μm range, while Cu solidifies within the 600 μm range. Simulation results confirm that combustion acceleration is significant before both particles are fully solidified, with the enhancement diminishing after Al 2 O 3 solidifies and nearly no combustion acceleration occurring after Cu solidifies. These findings clarify the structure-property relationship of energetic films, laying a solid foundation for the regulation of ignition timing based on the gap-burning rate correlation. The prepared lightweight, thin, and coatable films are suitable for microdevices, further opening up a new path for the development of multi-timing complex logic ignition networks.
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产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2011
·
IF 2.141
Qiang Chen,Dun-qiang Tan,Rui Liu,Wen-xian Li
Electrodepositing Al coatings on W 90 Cu 10 foils in AlCl 3 + LiAlH 4 Tetrahydrofuran–benzene electrolyte was reported in this work. Effects of variations in molar ratios of AlCl 3 /LiAlH 4 , current density and plating time on surface morphology and crystal orientations were studied, and the optimal values of three parameters were preliminarily gained. Results showed that Al coatings displayed dense and cone-shaped micro-crystallites, and the particle size of coatings increased obviously with increasing current density or decreasing the proportion of AlCl 3 . It was indicated that all of the electrodeposits exhibited a strong preferred (111), (220) crystal orientation, and the (220) crystal orientation became strong along with electroplating time and current density, but weak with the proportion of AlCl 3 in baths. On the contrary, the changes of the (111) orientation exhibited an opposite trend.
研究领域:
材料科学
·
电化学
·
表面工程
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DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-11
·
IF 4.259
Wu Chuandong,Ma Kaka,Zhang Dalong,Wu Jialu,Xiong Shuya,Luo Guoqiang,Zhang Jian,Chen Fei,Shen Qiang,Zhang Lianmeng,Lavernia Enrique J.
To provide insight into precipitation phenomena in age-hardening Al-Zn-Mg(-Cu) matrix composites, an Al 7075 alloy composite reinforced with B 4 C particles was selected as a model system. The bulk composites were fabricated via plasma activated sintering and followed by a peak aged (T6) heat treatment. Two types of Al matrix zones were identified in the composite: (1) the regions in the vicinity of the matrix/reinforcement interface, defined as “matrix plastic zone” (MPZ) hereafter, and (2) the regions away from the matrix/reinforcement interface, simply defined as matrix hereafter. The precipitation behavior in the MPZ was characterized and compared to that in the matrix. The MPZ contained a high density of dislocations. The number density of GP zones in the MPZ is lower than that in the matrix while the average size of the GP zones in MPZ is coarser. In addition, semi-coherent platelet η′ precipitates were observed but only in the MPZ. The dislocations and the Al/B 4 C interfaces provide more heterogeneous nucleation sites for the η′ precipitates in the MPZ. The growth and coarsening of the η′ precipitates caused rapid depletion of Mg and Zn solute atoms in the MPZ.
研究领域:
材料科学
·
金属基复合材料
·
物理冶金学
·
析出强化
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY A
·
2015
·
IF 2.693
Daixiong Zhang,Xueming Li
Nano-Al/NiO thermites were successfully prepared as film by electrophoretic deposition (EPD). For the key issue of this EPD, a mixture solvent of ethanol–acetylacetone (1:1 in volume) containing 0.00025 M nitric acid was proved to be a suitable dispersion system for EPD. The kinetics of electrophoretic deposition for both nano-Al and nano-NiO were investigated; the linear relation between deposition weight and deposition time in short time and parabolic relation in prolonged time were observed in both EPDs. The critical transition time between linear deposition kinetics and parabolic deposition kinetics for nano-Al and nano-NiO were 20 and 10 min, respectively. The theoretical calculation of the kinetics of electrophoretic deposition revealed that the equivalence ratio of nano-Al/NiO thermites film would be affected by the behavior of electrophoretic deposition for nano-Al and nano-NiO. The equivalence ratio remained steady when the linear deposition kinetics dominated for both nano-Al and nano-NiO. The equivalence ratio would change with deposition time when deposition kinetics for nano-NiO changed into parabolic kinetics dominated after 10 min. Therefore, the rule was suggested to be suitable for other EPD of bicomposites. We also studied thermodynamic properties of electrophoretic nano-Al/NiO thermites film as well as combustion performance.
研究领域:
材料科学
·
纳米技术
·
含能材料
·
物理化学
·
薄膜技术
✓ 已验证
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2026
·
IF 10.2
Huiyu Huang,Jia Yin,Shuo Zhang,Quanquan Yang,Zhong Chen,Qiang Tang,Xiaomin Qi,Songfei Su,Jinyan Chen,Hao Chen,Kan Zhu,Shengling Qu,Pengzhan Liu
Al-based batteries have been particularly attractive for integration with bioelectrolytes such as sweat and tears, enabling portable and biocompatible power sources. However, their practical applications are severely constrained by sluggish mass transfer and reaction kinetics at the catalytic electrode interface. In this study, we present a compact ultrasound-catalyzed Al-based bioelectrolyte battery (ABBB) to overcome this limitation, for which the catalysis mechanisms arise from the synergistic effects of acoustic pressure, acoustic streaming, and ultrasonic stirring for jointly accelerating interfacial mass transport and electrode reaction kinetics. Experimental results show that the ultrasonic liquid-phase catalysis can dramatically improve battery discharge performance, with peak power enhanced by higher than one order of amplitude (10-fold). Notably, when the artificial sweat mimicking human sweat composition is employed as the electrolyte, the peak power can be enhanced by approximately 5-fold under the ultrasonic excitation, highlighting its feasibility for practical biofluid-powered systems. This work establishes a novel physical-field catalytic strategy for boosting ABBB performance and provides a solid foundation for their applications in self-powered biosensors, wearable medical devices, and green electronic technologies.
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Yi Yang,Yingfeng Wang,Kaizhun Li,Wei Li,Xun Zhang,Maoli Yin,Xiaojuan Li,Zhipeng Ma,Hao Hou
CuS@6/PVA exhibited good photothermal conversion effect within 15 s. • CuS@6/PVA showed excellent photothermal and photodynamic antibacterial properties within 10 min. • Al@CuS/PVA series displayed satisfactory hemocompatibility. Wound infections remains a persistent clinical challenge, and antibacterial functionalization of wound dressings represented a promising and effective approach to addressing this issue. In this study, a series of aluminum-doped copper sulfide/polyvinyl alcohol (Al@CuS/PVA) nanofiber membranes were fabricated via electrospinning combined with an in situ synthesis method. Scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR) and ultraviolet-visible (UV–Vis) spectroscopy were adopted to conduct systematic characterization of the membranes’ structural and morphological properties. The results indicated that aluminum doping significantly enhanced both the photothermal conversion efficiency under near-infrared (NIR) irradiation and the photodynamic activity under simulated sunlight exposure. For CuS@6/PVA, the temperature rapidly increased to above 160 °C within 15 s under 1 W/cm² NIR irradiation, along with efficient reactive oxygen species (ROS) generation. In photothermal and photodynamic antibacterial testing, CuS@6/PVA demonstrated impressive bacterial eradication efficiency. Both Escherichia coli and S. aureus were completely inactivated within 10 min under NIR or simulated sunlight irradiation. Hemocompatibility assessment demonstrated low hemolysis rates (<5%), indicating favorable blood compatibility. These findings demonstrate that Al@CuS/PVA nanofiber membranes possess considerable potential as a dual-mode antibacterial platform for advanced wound dressings and other biomedical applications. Download: Download high-res image (221KB) Download: Download full-size image
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DOI
高影响因子
ChemNanoMat
·
2026
·Vol. 12
·期 6
·e70308
·
IF 2.6
Yongquan Zhang,Yuxin Tang,Jingshun Wang,Lin Bo,Bo Sun,Shengying Wang,Youjing Li,Mingxia Jiang,Tiandong Zhang
Spinel-type LiNi 0.5 Mn 1.5 O 4 is a promising high-voltage cathode material due to its advantages of high charge–discharge potential platform and high-energy density. However, the dissolution behavior of transition metal ions under high operating voltage can cause rapid degradation of the electrochemical performance of the battery, severely restricting the commercial application process of this material. To address the aforementioned bottleneck issues, this study introduced Al element doping during the precursor preparation stage and successfully synthesized Al-doped modified spinel cathode materials. The structural characterization results indicate that Al doping can effectively regulate the crystal morphology of the material, promote the evolution of particles from spherical to regular crystal forms, and reduce the relative content of Mn 3+ , thereby achieving effective suppression of Mn dissolution. Electrochemical testing shows that among the series of doped samples, LiNi 0.5 Mn 1.48 Al 0.02 O 4 exhibits the best rate performance and long-cycle stability: its first discharge specific capacity at 0.2 C can reach 126.7 mAh·g −1 , and after 500 cycles at 1 C, the capacity retention rate is still as high as 98.4%. The excellent electrochemical performance mentioned above confirms that in situ doping in the precursor stage is an efficient and feasible strategy for spinel positive electrode modification.
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Dawei Zhang,Lei Huang,Haoyu Li,Menglin Niu,Zeeshan Abbasi,Yue Li,Tongqi Ye,Xuelan Hou,Maofeng Zhang,Jie Ren
The development of high-activity Ni-based catalysts for efficient CO2 methanation remains challenging, primarily due to Ni particle aggregation under high loading conditions, which limits their long-term stability at low temperature. To address this issue, this work evaluates the effect of doping with typical metals M (i.e., Co, La, Fe, and Ce) on the properties of Ni–Mg–Al layered double oxides (LDOs). The Ni–Co LDO (Ni/Co = 18:2, wt%), with the lowest activation energy (i.e., 54.5 kJ/mol), achieved 80% CO2 conversion and 99.9% CH4 selectivity at 350 °C, while Ni–La LDO only showed 73% CO2 conversion. The catalytic performance of optimized Ni–Co LDO is also quite stable under a 140 h time-on-stream thermal shock evaluation. Comprehensive characterization reveals that Co doping is particularly effective in generating abundant oxygen vacancies, creating numerous interfacial basic sites and stabilizing small Ni particles. In situ DRIFTS analysis further elucidates the resulting differences in reaction intermediates, pathways, and coordination environments, linking the enhanced structural properties to superior catalytic performance.
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DOI
高影响因子
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