FOOD CHEMISTRY
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2026
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IF 10.4
Xiaolu Zhou,Ling Xia,Yufei Hu,Gongke Li
Preparation of γ-Al2O3/Eu-BTC for catalytic sensing toward terpenes. • A cyclic cataluminescence array sensor based on k-values corresponding to terpenes. • Investigation of the k -value pattern on the variation of terpene composition. • Origin identification of 86 hop samples based on characteristic terpenes. Hops are crucial to beer flavor, but their geographically dispersed origins are prone to confusion, while the significant variation in terpene ratios among hops from different regions provides key support for its origin identification. In this study，γ-Al 2 O 3 /Eu-BTC composite was synthesized for cyclic cataluminescence array sensor to terpenes. The results showed that the corresponding reaction decay coefficients ( k -values) for myrcene, farnesene, and humulene were 24.3, 32.0, and 73.8, respectively, enabling terpene-specific fingerprinting. Binary and ternary terpene mixtures exhibited predictable k -value variations, with relative standard deviations below 9.6%. A rapid detection method for hops identification was developed and successfully applied to 86 samples from six different origins. The method demonstrated both feasibility and accuracy, highlighting its potential as a rapid, simple, and efficient technique for origin identification of hops and other aromatic plants. Download: Download high-res image (160KB) Download: Download full-size image
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Yu-Zheng Wang,Shu-Qi Li,Zi-Kai Zhou,Chao-Jun Chen,Wei Yang,Si-Nuo Zhang,De-Zheng Yang
The development of mild and green ammonia synthesis is a significant and challenging research. In this study, a nanosecond pulse-driven coaxial double dielectric barrier discharge reactor was combined with M/γ-Al 2 O 3 (M = Co, Ni, Co–Ni) catalysts for efficient ammonia synthesis. Key parameters including pulse voltage, gas flow rate, and N 2 /H 2 molar ratio were systematically investigated. The Co–Ni/γ-Al 2 O 3 catalyst achieved the best energy efficiency of 1.11 g/kWh and a synthesis rate of 226.33 μmol g −1 h −1 under optimal conditions, which is 3.44 times higher than that of the plasma only system. Characterization revealed superior metal dispersion, smaller metal particle size, and larger specific surface area for Co–Ni/γ-Al 2 O 3 . Electrical diagnostics and optical emission spectroscopy (OES) showed that catalyst packing enhances discharge intensity and promotes key active species (N 2 ∗, N 2 + , and H α ). Synergistic effects between Co and Ni sites promote ammonia formation. This work provides new insights for designing high-efficiency plasma-catalytic ammonia synthesis systems.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Guanglin Cao,Xiao Chen,Huibin Liu,Weilin Shen,Changhai Liang
The catalytic reduction of nitroaromatic compounds to aromatic anilines is a widely employed route for producing high-value refined chemicals and large-scale commodities. Developing highly efficient catalysts represents a promising strategy to achieve continuous and selective hydrogenation of functionalized nitroarenes under flow conditions. In this work, γ-Al 2 O 3 @Ni/FeO x egg-shell microspherical catalysts featuring high atomic dispersion, high specific surface area, and tunable active sites are designed by strategically harnessing hydrotalcite-inspired characteristics, which integrates a Ni–FeO x interfacial synergy into an egg-shell architecture for continuous-flow selective hydrogenation. In the continuous flow selective hydrogenation of o -chloronitrobenzene, the γ-Al 2 O 3 @Ni/FeO x -3 egg-shell microspherical catalyst presents a turnover frequency (TOF) of 30.16 h −1 , substantially higher than those of γ-Al 2 O 3 @Ni and γ-Al 2 O 3 @FeO x . Compared with the uniform Ni 3 Fe 1 /Al 2 O 3 catalyst, the egg-shell catalyst also exhibits enhanced mass transfer efficiency. The egg-shell catalyst enables an increased presence of electron-rich Ni δ- sites and FeO x species rich in oxygen vacancies on the surface of γ-Al 2 O 3 microspheres. Due to the formation of Ni δ- -O v -Fe 2+ , the egg-shell catalyst exhibits remarkable H-spillover capability, significantly enhancing the selective hydrogenation of o -chloronitrobenzene to o -chloroaniline. The apparent activation energy of the γ-Al 2 O 3 @Ni/FeO x -3 catalyst is only 22.99 kJ mol −1 , much lower than those of other egg-shell catalysts, indicating the synergistic integration of metallic Ni sites and oxygen vacancies. In addition, the as-prepared γ-Al 2 O 3 @Ni/FeO x -3 egg-shell catalyst presents long-term stability over 80 h and broad substate scope. This work offers comprehensive guidance for the rational design of industrial egg-shell catalysts, as well as establishes a solid foundation for the continuous flow selective hydrogenation process, aimed at producing substituted anilines from functionalized nitroarenes.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Yonghai Gou,Jun Pang,Chaochao Dong,Zhenzhen Qiu,Huidong Mo,Jilin Wang,Rui Zhang
YAG:Ce-Al 2 O 3 composite ceramics were prepared by the Joule-heating sintering at 1850 °C within 3 min. • YAG:0.012Ce-8Al 2 O 3 ceramic shows relative density of 99.62% and transmittance of 42.3% at 600 nm. • YAG:0.012Ce-8Al 2 O 3 ceramic shows bright yellow-green emission with quantum efficiency of 80.12%. • The assembled white LED achieves a LE of 138.5 lm∙W ‐1 , and white LD delivers a LF of 392.3 lm. YAG:Ce-Al 2 O 3 composite ceramic phosphors are promising all-inorganic color converters for high-power white LEDs/LDs, but the conventional preparation requires prolonged high-temperature sintering. In this work, (100 − y )Y 3- x Al 5 O 12 : x Ce 3+ - y Al 2 O 3 (YAG: x Ce- y Al 2 O 3 , 0.002 ≤ x ≤ 0.024, 0 ≤ y ≤ 12 wt%) composite ceramic phosphors were prepared by graphite-assisted Joule-heating sintering. Dense ceramics were obtained at a nominal mold temperature of 1850 °C within 3 min. The effects of Ce 3+ concentration and Al 2 O 3 content on phase composition, microstructure, optical transmittance, luminescence behavior and thermal stability were investigated in detail. The optimized YAG:0.012Ce-8Al 2 O 3 ceramic exhibited a relative density of 99.62%, an in-line transmittance of 42.3% at 600 nm (0.5 mm thickness), an internal quantum efficiency of 80.12%, and a retained emission intensity of 84.26% at 150 °C. The introduction of Al 2 O 3 refined YAG:Ce grains and enhanced excitation-light scattering, thereby improving excitation-light absorption and emission output. The 0.4 mm-thick ceramic-based white LED device achieved a luminous efficacy of 138.5 lm∙W ‐1 , while the 1.2 mm-thick ceramic delivered a luminous flux of 392.3 lm under 450 nm laser excitation. These results indicate that the Joule-heating sintering provides a rapid-processing route for ceramic phosphors toward white LED/LD applications.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Wang Liu,Yanhai Cheng,Gongyuan Tu,Fanwei Xia,Jinyong Yang,Qiang Ye
Al 2 O 3 -metal interpenetrating composites are attractive for protective structures, but conventional infiltration often produces interfaces dominated by mechanical interlocking, which restricts interfacial bonding and load transfer. In this study, an integrated manufacturing route was developed to fabricate Al 2 O 3 -FeCoCrNiMn high-entropy alloy (HEA) interpenetrating composites. An Al 2 O 3 -HEA auxetic honeycomb skeleton was first prepared by digital light processing (DLP) 3D printing. HEA slurry was subsequently introduced into the designed pores by gel casting, followed by integrated debinding and vacuum hot-press sintering. This dual HEA introduction strategy embeds HEA particles in the printed ceramic skeleton while filling the pores with HEA slurry, thereby promoting interfacial diffusion and the formation of a continuous ceramic-metal interpenetrating structure. HEA incorporation improved the densification of the Al 2 O 3 -based skeleton and facilitated the formation of a Cr-rich interfacial diffusion layer at the Al 2 O 3 /HEA interface. For the representative 20 wt% HEA composition, high-vacuum sintering yielded a compressive strength of 1218 MPa and a volumetric energy absorption of 7.68 MJ/m 3 . The route enables co-processing of architected alumina with a high-melting metallic phase while linking printability, densification, and interface development.
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COMPOSITES SCIENCE AND TECHNOLOGY
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2026
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IF 9.9
Xiaohang Yu,Zhaotian Ba,Yu Long,Meng Xin,Guohua Fan,Chuncheng Hao
Traditional polymer-based dielectric energy storage materials are typically limited by the compromise between low dielectric permittivity and inadequate breakdown strength. This trade-off represents a major bottleneck that severely restricts the enhancement of energy storage performance. In this work, we introduced a ternary composite design that synergistically integrates two-dimensional MXene nanosheets and insulating Al 2 O 3 nanoparticles into a polyvinylidene fluoride (PVDF) matrix. In this structure, the MXene component induces strong interfacial polarization, significantly enhancing the effective dielectric constant, while the Al 2 O 3 filler acts as a nanoscale barrier, inhibiting charge injection and leakage conduction, thereby maintaining high breakdown strength. With a low filler loading of 0.2 wt%, the film demonstrated a dielectric permittivity of 18.15 and a dielectric loss of 0.028. Moreover, the breakdown strength attained 124% of that measured for pure PVDF, and the maximum discharge energy density increased to 4.76 J/cm 3 . This design provides a novel route for energy storage utilizing advanced dielectric materials. Download: Download high-res image (238KB) Download: Download full-size image
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MATERIALS CHEMISTRY AND PHYSICS
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2026
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IF 5.2
Kuanping Gong,Yongquan Jiang,YongMan Choi
We describe the synthesis and characterization of CaSe 1-x S x :Eu (0 ≤ x ≤ 1) phosphors, uniformly coated with alternating metal oxide layers via a customized fluidized-bed chemical vapor deposition (FB-CVD) technique. Through precise sintering control, the phosphor composition is engineered for tunable red emission under 450 nm blue excitation. First-principles calculations show that Eu 2+ substitution introduces localized Eu 4f states just below the conduction band minimum, enabling efficient blue excitation and red emission, while sulfur substitution enhances lattice stability by increasing intrinsic chalcogenide migration barriers. This energy-level configuration explains efficient Eu 2+ luminescent center activation, yielding intense red emission. Moreover, Se substitution with S increases the anionic migration barrier progressively, consistent with experimental observations of CaSe 1-x S x degradation in humid environments due to Se's inherent instability. However, this moisture susceptibility is markedly reduced via uniform, conformal FB-CVD barrier coatings on individual phosphor particles. Stabilized CaSe 1-x S x phosphors serve as promising components in high-performance warm white light-emitting diodes (W-LEDs), enabling blue-to-red light conversion. As a result, fabricated W-LEDs retain >95% of initial luminance after 1000 h of operation, with negligible chromaticity coordinate shifts.
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高影响因子
Journal of Materials Research and Technology-JMR&T
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2026
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IF 7.3
Yunjia Hu,Renli Fu,Zeya Huang,Meng Meng,Jindan Tian,Xing Gao,Yunan Liu
This study developed a soldering process for joining Al to Cu-metallized ceramic substrates, aiming to overcome the formation of brittle intermetallic compounds in Sn-based solders, which usually lead to low joint strength. Zn foils coated with Sn-10Zn or Sn-20In solders were used as hybrid solders to bond Ni-plated Al components to Cu-metallized Al 2 O 3 substrates at 220 °C. With increasing soldering time, the solder on the Zn surface gradually transformed into NiZn 3 , and the formation mechanism of the NiZn 3 phase was analyzed from thermodynamic and kinetic perspectives. The shear strength of the joints increased with prolonged soldering times, reaching a maximum of 67 MPa for the Sn-10Zn/Zn solder at 240 min. In the Sn-10Zn joints, NiZn 3 formed a continuous transition layer that effectively reduced stress concentration. In contrast, the Sn-20In/Zn joints showed discontinuous NiZn 3 layers and significant interfacial stress, resulting in lower shear strength.
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POLYMER ENGINEERING AND SCIENCE
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2026
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IF 3.6
Jiaqi Guo,Qiuyue Wang,Yanxia Cao,Yanyu Yang,Jianfeng Wang,Wanjie Wang
Polyamide 1012 (PA1012) composites with balanced strength and toughness were fabricated by blending with lanthanum-neutralized polyolefin elastomer (POE) ionomers and nano-alumina grafted with nylon short chains (Al 2 O 3 -PA). Al 2 O 3 -PA was synthesized based on in situ polymerization, while POE ionomers with different glutamic acid/maleic anhydride mole ratios were prepared through melt-blending. The multiple interactions between La 3+ -carboxyl/amide groups and dynamic networks formed by chain entanglement of Al 2 O 3 -PA with PA1012 and POE ionomers significantly improved PA1012's mechanical properties. Compared with pure PA1012, the impact toughness (92.0 kJ/m 2 ) of PA1012/POE ionomer/Al 2 O 3 -PA composites was 14 times higher while the tensile strength (53.4 MPa) retained 86.1% of its value. Rheological characterization showed decreased melt viscosity, helping with processing challenges in rubber-toughened plastics. The toughening mechanism was attributed to matrix yielding, elastomer particle deformation, and dynamic network destruction. This work provides an efficient strategy for designing high-performance polyamide composites with balanced mechanical properties and enlarging their applications in automotive, electronics and military fields. Highlights Preparation of POE ionomer and Al 2 O 3 -PA. Investigating synergistic interactions of POE ionomer with Al 2 O 3 -PA. Enhanced improvement in mechanical performance of PA1012 composites. Exhibiting a dynamic network based on rheological measurements.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Peng Shu,Yunzhu Ma,Wensheng Liu,Juan Wang,Shuwei Yao
Al 2 O 3 -ZrO 2 biphasic fibers were of considerable interest due to their superior mechanical properties and thermal stability. Despite this, precise control over fiber structure and further enhancement of thermal stability remained significant challenges. This study investigated the regulation of phase transformation behavior and thermal stability in Al 2 O 3 -ZrO 2 fibers through Sc 2 O 3 doping. The findings demonstrated that Sc 2 O 3 doping facilitated the formation of α-Al 2 O 3 and t-ZrO 2 phases within the fibers. In samples containing 1 wt.% Sc 2 O 3 , the average crystal size of α-Al 2 O 3 was 160 nm, while t-ZrO 2 crystals displayed a bimodal nanoscale distribution. The Weibull strength of these fibers reached 1.99 GPa. Following exposure to 1200 °C for 100 h, most α-Al 2 O 3 crystal sizes remained within the 200-300 nm range. The mechanism by which Sc 2 O 3 doping affects structural evolution and enhances the thermal stability of Al 2 O 3 -ZrO 2 fibers was also examined.
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PROGRESS IN ORGANIC COATINGS
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2026
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IF 7.9
Zhao-Xu Chen,Xin-Ran Li,Hao Li,Run-Chao Zheng,Xian-Ze Meng,Lian-Kui Wu,Fa-He Cao
Polyurea coating offers robust protection against weathering and corrosion, yet the limited wear resistance remains a bottleneck for long-term service in marine environments. In this study, a high-performance polyurea coating incorporating APTES-modified Al 2 O 3 nanoparticles was developed on Q235 steel. The surface-grafted amino groups not only improve the compatibility between Al 2 O 3 nanoparticles and polymer matrix but also facilitate the establishment of strong interfacial bonds within the polyurea network, thereby significantly bolstering the coating's mechanical properties and environmental durability. Compared to pure polyurea, the composite coating achieves a 41.1% lower mass loss under a 1000 g load and 2000 wear cycles, demonstrating reliable wear resistance. Moreover, the nanoparticles enhance the structural compactness of the coating and increase the tortuosity of the diffusion pathways for corrosive mediums, leading to a remarkable enhancement in corrosion protection. After immersion in 3.5 wt% NaCl solution for 120 days, the low-frequency impedance modulus (| Z | f =0.01Hz ) of the composite polyurea coating remains above 10 11 Ω·cm 2 . Meanwhile, the composite polyurea coating exhibits superior resistance to UV aging. These findings demonstrate the great potential of this nano-alumina-reinforced polyurea composite for application in high-performance protective coatings.
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JOURNAL OF ELECTRONIC MATERIALS
·
2026
·Vol. 55
·期 9
·7684-7697
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IF 2.8
Wang Guangping,Li Jie,Liu Jianhua,Yang Zhenhua
The primary crystallization temperature of an electrolyte is a critical parameter in the aluminum electrolysis process, determining the operating temperature of the electrolytic process. Therefore, the initial crystallization temperature is one of the most critical physicochemical properties of the electrolyte in the electrolytic aluminum process. However, the Na 3 AlF 6 -AlF 3 electrolyte system, which is predominantly used in industrial electrolysis systems, operates at high temperatures. Lowering the electrolysis temperature would lead to numerous issues, including reduced current efficiency and increased cell voltage. Therefore, we propose low-temperature aluminum electrolysis in the Na 3 AlF 6 -K 3 AlF 6 -Li 3 AlF 6 -AlF 3 -KF-Al 2 O 3 electrolyte system. The synergistic effect of K 3 AlF 6 and Li 3 AlF 6 on the initial crystallization temperature within this system was investigated. Results indicate that at a cryolite molar ratio (CR) of 1.7–2, each unit of K 3 AlF 6 added reduces the initial crystallization temperature by an average of 2–4°C, while each unit of Li 3 AlF 6 added lowers it by an average of 0.5–3.5°C. Analysis of the cold-quenched electrolyte phases indicates the formation of phases such as Na 5 Al 3 F 14 , K 2 NaAlF 6 , and Na 2 LiAlF 6 within the electrolyte system. This study systematically measured the initial crystallization temperatures of the Na 3 AlF 6 -K 3 AlF 6 -Li 3 AlF 6 -AlF 3 -KF-Al 2 O 3 electrolyte system. It significantly advances the progress of the aluminum electrolysis industry toward green and low-carbon development, opening new technical pathways for achieving energy conservation and emission reduction targets in aluminum electrolysis production processes. Graphical
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