Laser & Photonics Reviews
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2021
·Vol. 15
·期 11
·2100392
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IF 13.138
Jianwei Qiao,Yayun Zhou,Maxim S. Molokeev,Qinyuan Zhang,Zhiguo Xia
It remains a critical challenge to develop narrow-band emitters for wide color gamut displays. Herein, it is designed by the selective site occupancy engineering and an unprecedented narrow-band green-emitting phosphor is prepared through chemical substitution. By introducing Ga 3+ ions into Sr 2 LiAlO 4 :Eu 2+ phosphor, the distribution of Eu 2+ ions in Sr1 and Sr2 sites is effectively controlled, and only one type of luminescent centers Eu 2+ (Sr1) is remained in Sr 2 LiAl 0.6 Ga 0.4 O 4 :Eu 2+ due to the compression effect of Sr2O 8 polyhedra. Sr 2 LiAl 0.6 Ga 0.4 O 4 :Eu 2+ phosphor presents an extremely narrow-band green emission centered at 512 nm with a full-width at half-maximum of only 40 nm. The wide color gamut (107% National Television System Committee) of the as-fabricated white liquid crystal displays and the vivid figures captured from the projector demonstrate the potential application of narrow-band emitter for wide-color gamut displays. This work provides the design principles of realizing narrow-band emission by selective site occupancy engineering and can set the stage for the exploring of Eu 2+ -activated phosphor for high definition displays.
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高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2023
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IF 4.6
Xinhua Liu,Chengkun Ma,Shaowei Lu,Rongzheng Xu,Keming Ma,Xingmin Liu,Lu Zhang
In this paper, the health monitoring of Al 7075 friction stir welded structure was carried out, including elastic and plastic deformation during stretching and bending. A thin film sensor composed of MXene and single-walled carbon nanotubes was developed by simple mixing and vacuum filtration. This flexible MXene/SWCNT thin film sensor combining the sensitivity of MXene with the stability of carbon nanotubes and can be pasted on the surface of Al 7075 FSW joints through polyimide encapsulation to achieve structural health monitoring . The experimental results show that the MXene/SWCNT sensors encapsulated in polyimide can effectively capture the micro strain of different areas during stretching and bending. When the strain of the welded structure is less than 3000, only elastic deformation occurs in different regions of the welded structure, and the sensors located in different regions show the same resistance change rate. When the strain is greater than 3000, the resistance change rate of the sensors in the thermal-mechanical affected zone and heat affected zone obviously, and when the external force is released, there is residual resistance , which proves that the plastic deformation occurs in the welded structure at this time. By comparing the resistance change rate of the sensors in different regions, it can be inferred whether plastic deformation occurs. As the strain further increases, the resistance change rate of the sensor further increases and make a stable response until the structure breaks. This sensor can be used to track the whole process monitoring of welded structure before fracture.
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Chemical Engineering and Processing-Process Intensification
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2023
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IF 4.3
Lixiang Zhu,Shuo Wang,Jiaxing Wang,Jiabao Zhu,Xiaodong Li,Meishuai Zou
The Al-water reaction has attracted many attentions as it's a convenient method for on-demand hydrogen generation. Although a variety of additives have been demonstrated to promote the activity of Al, the most likely mechanism is simply the inference made from surface conditions and reaction characteristics. In this study, the activation of two kinds of active Al-10Bi alloys powders was prepared by both melting alloy and mechanical alloy methods. The activity of the as obtained powders was analyzed through various methods including XRD, SEM. 3D characterization of active Al powders was conducted using synchrotron X-ray tomography to reveal the inner structure of ball milled active Al alloy powders. Results show that ball milling could effectively introduce a large number of cracks both on the surface and the inner of powders. The number of cracks increased further after adding salt during ball milling. The relation between the inner structure of the Al alloys and their hydrolysis reaction products was also discussed. The specific surface area, the number and distribution of cracks alloy phase are all important factors that influence the hydrolysis reaction of the active alloy powder.
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CONSTRUCTION AND BUILDING MATERIALS
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2018
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IF 3.485
Lei Cao,Jintang Guo,Jianhua Tian,Yang Xu,Miaomiao Hu,Meiyu Wang,Jinjie Fan
Ca/Al-Layered Double Hydroxide (Ca/Al-LDH), was a kind of important anionic clays with broad applications owing to its properties of exchangeable anion and adjustable particle size. In this study, Ca/Al-LDH had been successfully prepared by co-precipitation method, and it was found that the particle size, crystallinity and morphology of Ca/Al-LDH could be tuned via changing ethanol/water ratio of solution. More interestingly, with the increase of the Ca/Al-LDH’s dosage, the different crystal structure of Ca/Al-LDH had promoting effect on the development of the early strength of the cement slurries, however, the change trend of the strength growth rate of various kinds of cement slurries were quite different. Meanwhile, experimental results disclosed that the crystallinity and particle size of Ca/Al-LDH determined its interaction with cement hydration particles. That was likely to lead to a change in tricalcium silicate (C 3 S) and tricalcium aluminate (C 3 A) hydration process of accelerating or retarding under the different Ca/Al-LDH content, thus enabling the early strength development of slurry to exhibit different trends. And this finding could provide further interpretation for the effect of hydrotalcite-like materials on cement hydration process and offer a theoretical exploration for its practical application in the future.
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COMPOSITES PART B-ENGINEERING
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2026
·
IF 14
Haizhu Li,Fuyang Sun,Dinghua Hu,Changrui Wang,Qiang Li,Xuemei Chen
The heat dissipation bottleneck induced by the high-power density of electronic devices is a core challenge that limits their operational stability and long-term reliability. Herein, diamond-Cu and diamond-Al composites (DCC and DAC) were systematically investigated with respect to material preparation, performance characterization, and reliability under extreme environments. X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy analyses indicate the presence of W-derived carbide-containing interfacial regions and close contact between the diamond particles and the Cu and Al matrices. Among the investigated particle-size distributions and diamond volume fractions, maximum thermal conductivities of 793.9 and 775.8 W m −1 K −1 were obtained for the DCC and DAC, respectively, while the DCC exhibited a maximum flexural strength of 405 MPa. The DCC underwent interfacial electrochemical corrosion in an acidic salt spray environment with a pH of 3.5, resulting in a maximum degradation of thermal conductivity of 26.8%. A gold-nickel protective coating with a thickness of at least 3 μm effectively suppressed micro-galvanic corrosion and significantly enhanced the corrosion resistance of both DCC and DAC. Furthermore, the composites exhibited excellent structural and thermal stability under high/low temperature, damp heat, and vibration conditions. Infrared thermal imaging tests verified their excellent heat dissipation performance. At 16.7 W cm −2 , the DCC and DAC reduced the heat-source temperature by 88.1 and 66.9 K, respectively, relative to 70Si/Al, with thermal stabilization reached within approximately 300 s. The developed composites demonstrated stable thermal performance under the prescribed laboratory environmental and mechanical loading conditions, indicating their potential for high-reliability electronic thermal-management applications.
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Nanomaterials
·
2026
·Vol. 16
·期 16
·1015
·
IF 4.8
Xin Lin,Jiayi Tu,Jinyun Zhao,Fangfang Wu,Xingping Fu,Hao Lin,Jiapeng Hu
In this study, a hierarchical rod-assembled, polypyrrole-modified Ce–Al–La trimetallic metal–organic framework (Ce–Al–La–MOFs@PPy) composite was successfully synthesized through a solvothermal method combined with in situ polymerization for efficient fluoride removal from aqueous solutions. The incorporation of conductive polypyrrole (PPy) into the multimetallic MOFs effectively enhanced the structural stability, surface properties, and adsorption performance of the material. Adsorption experiments demonstrated that the optimal metal-to-ligand molar ratio was 3:1, and the prepared adsorbent exhibited excellent fluoride removal performance under weakly acidic conditions (pH = 5). The maximum adsorption capacity calculated from the Langmuir model reached 216.92 mg·g−1at 45 °C. Adsorption kinetics were well fitted by the pseudo-second-order model, indicating that the adsorption process was mainly governed by chemisorption. Mechanism investigations based on FTIR and XPS analyses demonstrated that fluoride removal mainly occurred through electrostatic attraction and coordination exchange between fluoride ions and the Ce/La active sites. In addition, the composite exhibited good selectivity, anti-interference ability toward coexisting ions, and satisfactory fluoride removal performance in practical industrial wastewater. These findings suggest that Ce–Al–La–MOFs@PPy is a promising adsorbent for efficient fluoride-contaminated wastewater treatment.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2026
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IF 3.9
Yifan Yue,Baohe Wang,Aiping Wang,Fuying Zhao,Jing Zhu,Jing Ma
The catalytic efficiency for methyl methacrylate (MMA) production via aldol condensation of methyl propionate (MP) and formaldehyde (FA) depends on the acid–base and structural properties of the catalyst. Inspired by this, a synergistic design strategy is implemented by fabricating Cs/Al-MCM-41 catalysts, where Al doping preserves ordered mesopores and tunes acid–base properties. This approach generates an optimal density of medium acid sites together with a balanced distribution of weak-to-medium base sites, leading to 90% MMA selectivity and a space-time yield of 0.29 g/(gcat·h). Moreover, the mesoporous confinement not only enhances the dispersion of Cs active species but also suppresses the condensation of coke precursors, thereby significantly improving the catalyst stability. Density functional theory (DFT) calculations reveal that basic Cs–O–Si sites and acidic Al sites cooperatively activate MP and FA, promoting aldol condensation. This work demonstrates that the integration of targeted acid–base regulation with structural confinement provides a rational catalyst design principle for efficient aldol condensation.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Xiudong Zhu,Wei Guo,Zhang Wei,Zhe Sheng,Xiongchao Lin,Deping Xu,Yonggang Wang
M 3+ controls phase evolution: Al/Ga form Cu-Co alloy; In 3+ leads to CuIn, CoIn 2 , In 2 O 3 separation. • Surface hydroxyls and bridged CO provide dual CHₓ sources for C 2+ OH formation. • Medium-strength basic sites and Cu + fraction, not total basicity, govern C 2+ OH selectivity. • Smaller M 3+ radius (Al 3+ ) strengthens metal-support interaction, enhancing dispersion and performance. The modulation of trivalent cations in layered double hydroxide (LDH)-derived catalysts provides an effective strategy for tuning the multifunctional active sites for higher alcohol synthesis. In this study, a series of layered CuCoM catalysts (M = Al, Ga, In) was synthesized via alkaline co-precipitation and evaluated for higher alcohols synthesis via CO hydrogenation. The results demonstrate that the introduction of M 3 + is essential for constructing the LDH precursor structure and significantly influences the phase evolution, morphology, textural properties, reducibility, surface basicity, and chemical states of the catalysts. Among the catalysts tested, CuCoAl exhibited the best overall performance, achieving a CO conversion of 35.60%, an ethanol selectivity of 39.97%, and a C 2 + alcohols selectivity of 73.47%. Structural characterization revealed that CuCoAl had the highest specific surface area and the most uniform dispersion of Cu and Co species, which favored the exposure of accessible active sites. CO 2 -TPD, XPS, and in situ DRIFTS results further indicated that CuCoAl contained abundant surface hydroxyl groups and a higher fraction of Cu + , which promoted the formation of formate species, facilitated non-dissociative CO insertion, and enhanced CH x generation through both formate hydrogenation and bridged CO dissociation on Co sites. The superior catalytic performance of CuCoAl is thus attributed to the synergistic effect of highly dispersed Cu-Co active sites, abundant surface hydroxyl groups, and optimized Cu + /Co interfacial functionalities. This study provides mechanistic insights into trivalent-cation regulation in LDH-derived CuCo catalysts and offers a rational strategy for the design of efficient catalysts for higher alcohol synthesis from syngas. Download: Download high-res image (174KB) Download: Download full-size image
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Zhongwei Hu,Yi Wu,Haotian Zhou,Zhanjun Yang,Dan Zhang,Qiaofeng Han,Lifeng Xie,Fahad Ali
Defect−rich Al powder was prepared via eco−friendly glycolic acid etching. • Combustion mechanism shifted from melt-dispersion to defect-mediated diffusion. • Apparent activation energy of Al/CuO system was reduced by 25.2%. • Enhanced interfacial affinity boosted combustion dynamics with shorter ignition delay and higher peak pressure. To overcome the inherent limitations of micron-sized aluminum (μm-Al) in energetic applications, that is, prolonged ignition delay and incomplete combustion, this study proposes an eco-friendly surface engineering strategy via controlled glycolic acid etching. The deliberate acidification of 10 μm-Al yields a sub-micron pit architecture that simultaneously enhances the reactive surface area and active Al content. When integrated into Al/n-CuO thermites, the optimized etched Al (8-hour etching) demonstrated superior reactivity. Kinetic analysis revealed a 25.25% reduction in activation energy (from 479.08 kJ·mol −1 to 358.12 kJ·mol −1 ) compared to the raw Al system. More importantly, constant-volume combustion tests showed that the etched Al thermite exhibited a peak pressure of 342.02 kPa and a violent pressurization rate of 5.86 MPa·s −1 , which are 1.4 and 3.2 times those of the raw Al counterpart, respectively. These enhancements, coupled with a 53.67% increase in combustion temperature and a 27.8% reduction in ignition delay, are attributed to the alleviated interfacial mass transfer barriers provided by the pit structure. This strategy offers an eco-friendly pathway to tailor the combustion kinetics of metallic fuels for advanced energetic composites. Download: Download high-res image (228KB) Download: Download full-size image
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Da Li,Xin Ai,Ting Sun,Jingrong Li,Yanan Bai,Bin Ma,Jing Ren,Enze Li,Zihe Pan
LDH was in-situ embedded at the sponge skeleton surface. • Embedding LDH at a proper content resulted in smaller pore size, larger porosity, narrow pore size distribution. • The adsorption capacity of LDH epoxy sponge is as large as 8.10 mg/g. • After 15 times cycle adsorption, Li removal rate maintained as 47.87%. • The LDH embedded epoxy sponge showed excellent mechanical robustness and elasticity. Lithium-aluminum layered double hydroxide (Li-Al LDH) powders are still severely restricted in practical Li adsorption due to the unsatisfactory adsorption capacity, severe active component loss and inferior long-term cycling stability. Herein, we propose a novel Li-Al LDH-epoxy lithium adsorption sponge, which is fabricated via an in-situ embedding strategy, where active LDH components are uniformly anchored onto the skeleton surface of the sponge during the pore-forming process. The as-constructed LDH coating on the sponge skeleton presents an ultrathin filmy morphology with a thickness of only several micrometers, which not only well preserves the intrinsic elasticity of the pristine sponge matrix, but also significantly reinforces its mechanical strength. Meanwhile, the resultant hierarchical porous architecture further contributes to the prominent improvement of lithium adsorption performance. The optimized LDH sponge delivers a large specific surface area of 413.26 m 2 /g, a well-defined hierarchical pore system with dual pore sizes of 150 μm and 13.13 nm, and a high lithium adsorption capacity of 7.85 mg/g. More importantly, the composite sponge can stably withstand 50 compression-strain cycles under a high strain of 60% without obvious structural failure. This sponge-supported LDH composite porous system provides a brand-new design paradigm for developing high-performance adsorbents toward practical lithium extraction applications. Download: Download high-res image (115KB) Download: Download full-size image
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Bin Xu,Huabing Wang,Xianlin Wang,Youbang Ye,Jiacheng Zhang,Cailing Yang,Dekang Gao,Yang Jin,Diantang Zhang
This study develops a conductive material that remains stable in air at extremely high temperatures. Traditional conductive materials, such as carbon- or metal-based systems, often degrade or oxidize near 1000 °C, which limits their use in harsh environments. To solve this problem, we designed a composite material made of heat-resistant aluminum oxide fibers and a gallium–indium liquid metal. A needle-based method was used to distribute the liquid metal evenly through the fiber network, creating continuous conductive pathways. The material was then tested under high temperatures in air to evaluate its electrical stability and mechanical response. The results show that it maintained stable electrical performance at 1000 °C in air for three hours, with very small resistance changes. After repeated heating and cooling between room temperature and 1000 °C, the resistance remained highly stable. High-temperature treatment also reduced the material’s sensitivity to bending and pressure. Structural analysis indicates that a stable oxide layer formed during heating, while the fiber framework preserved the overall structure. These findings provide a simple and effective strategy for designing flexible conductive materials for high-temperature and harsh-environment applications.
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Molecular Catalysis
·
2026
·
IF 4.3
Dandan Zuo,Wuyu Wang,Miaojia Song,Peng Zheng,Sa Li,Qi Zhang,Xinghua Zhang,Longlong Ma
A ternary Cu-Nb/Al-MCM-41 catalyst achieves 99.60 % 2-methylfuran selectivity at 160 °C under atmospheric H2. • Al incorporation enhances metal dispersion and generates balanced Brønsted-Lewis acidity for controlled C O hydrogenolysis. • Nb promotion enables efficient H2 activation and strengthens Cu-Nb interfacial electronic coupling. • The catalyst exhibits excellent long-term stability and can operate continuously in a fixed bed for 500 h. The selective hydrodeoxygenation (HDO) of furfural (FAL) into 2-methylfuran (2-MF) is a crucial transformation for upgrading lignocellulosic biomass into liquid fuels. Herein, a series of Cu-Nb catalysts supported on mesoporous MCM-41 were developed. Over the optimized Cu-Nb/Al-MCM-41 catalyst, FAL was completely converted and the selectivity of 2-MF was 99.60 % at only 160 °C under ambient hydrogen pressure. Structural analyses revealed that Al incorporation reinforced metal-support interactions, enhanced Cu dispersion, and producing moderate Brønsted-Lewis acid sites, which synergistically facilitated hydrogen transfer and selective C O bond cleavage. In situ DRIFTS and XPS measurements confirmed a tandem hydrogenation-dehydration pathway proceeding via furfuryl-alcohol (FOL) intermediates, where Nb promoted H 2 activation and Al-derived acid centers accelerated dehydration at interfacial Cu-Nb-Al sites. The catalyst maintained high activity and selectivity during 500 h time-on-stream in a fixed-bed reactor, although slight deactivation was observed after prolonged operation. These findings establish a clear structure-function correlation between electronic modulation and acid-metal synergy, offering a sustainable strategy for efficiently producing furan-based biofuels under mild conditions. Download: Download high-res image (291KB) Download: Download full-size image
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危险品化学品经营许可证（带存储）