JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Jinfeng Li,Yuxuan Li,Yang Liu,Yuan Shao,Wuyang Song,Youjun Lu
： High-entropy nitride ceramics (HENCs) require high sintering temperatures,and exhibit relatively low density and insufficient fracture toughness, greatly restricting their applicability in structural load-bearing scenarios under extreme service environments. To address these limitations, this study employed Fe as a sintering aid and prepared (Hf 0.2 Zr 0.2 Ti 0.2 Nb 0.2 Ta 0.2 )N-Fe composite ceramics with 0–20 wt% Fe via spark plasma sintering (SPS) in the temperature range of 1600–2100 ℃. We evaluated how Fe content and sintering temperature jointly affect microstructure and mechanical properties. The results show that pure HEN ceramics densifies only at 2100 °C, reaching 96.41% relative density, due to sluggish diffusion and lattice distortion. Although high temperature enhances diffusion, it also coarsens the grains to 5.40 ± 2.18 μm. In contrast, adding only 5 wt% Fe enables densification at a reduced temperature of 1700 °C, achieving 98.81% relative density and refining the grain size to 3.25 ± 1.01 μm. Regarding mechanical properties, pure HEN ceramics exhibits a hardness of 19.79 ± 0.49 GPa and a fracture toughness of 3.86 ± 0.32 MPa·m 1/2 . When 5 wt% Fe is added, both mechanical indices increase markedly, with hardness increasing to 21.09 ± 0.35 GPa and fracture toughness to 4.38 ± 0.31 MPa·m 1/2 . These results demonstrate a pronounced synergistic effect of Fe addition and reduced sintering temperature on the microstructure of HEN ceramics. During sintering, by forming Fe-rich interfacial phases, Fe accelerates low-temperature densification, while its segregation at grain boundaries and triple junctions regulates boundary migration, enabling fine grains and high density at reduced sintering temperatures.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2026
·
IF 9.8
Ting Liu,Menghui Yin,Beibei Li,Salifu Nasir,Qiang Chen
The accelerating demand for sustainable, high-rate, and durable energy storage underscores the need for carbon electrodes that simultaneously offer balanced micro–mesoporosity for rapid ion transport and robust heteroatom functionalities for enhanced interfacial chemistry. In the present work, we convert bitumen asphaltenes and recycled cellulose acetate into N/S co-doped hierarchical carbons via ammonium persulfate-assisted co‑carbonization and KOH activation. The optimized carbon combines an ultrahigh specific surface area of 3527 m 2 g −1 , balanced micro–mesoporosity, and uniformly distributed electroactive N/S species (pyridinic/pyrrolic N, C S, SO x ), enhancing conductivity and pseudocapacitance. In three-electrode tests, the electrode delivered 382.5 F g −1 at 0.5 A g −1 with 74% retention at 10 A g −1 . The symmetric aqueous device achieved a specific capacitance of 288.2 F g −1 at 0.5 A g −1 , energy densities of 10.01 Wh kg −1 at 257.4 W kg −1 and 5.42 Wh kg −1 at 6728.3 W kg −1 , and 108.7% capacitance retention after 10,000 cycles at 5 A g −1 . This study advances sustainable energy storage by enabling low-cost, high-performance supercapacitors and promoting solid-waste recycling.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Zhuo Pu,Qiuhao Wang,Liming Tao,Hongqi Fu,Jianyong He,Zhiyong Gao
Zircon is the primary mineral for zirconium and hafnium extraction. However, removing associated gangue minerals such as feldspar from fine zircon ore is challenging due to the limitations of utilizing a single collector. This paper proposed a mixed collector n-octylphosphonic acid (n-OPA)/octyl hydroxamic acid (OHA) to promote the separation of zircon and feldspar. Accordingly, solution chemistry calculations, zeta potential, surface tension measurements and density functional theory (DFT) calculations were performed to study the detailed adsorption mechanism of mixed collector on surface of zircon. Flotation results for single minerals demonstrated that the mixed collector effectively facilitated the separation of zircon from feldspar, achieving a maximum recovery difference exceeding 88.00%. Run-of-mine ore flotation tests indicated that the use of n-OPA/OHA as a collector resulted in a zircon concentrate with a ZrSiO 4 grade of 12.57% and a recovery of 82.21%. In contrast, when sodium oleate (NaOL) was used as the collector, the ZrSiO 4 grade and recovery were 8.33% and 66.01%, respectively. Solution chemistry calculations and zeta potential measurements indicated that at pH 2.0, the mixed collector exists in the forms of n-OPA molecules, n-OPA −1 , and OHA molecules. Following interaction with the mixed collector, the surface potential of zircon significantly decreased by 14.8 mV. Surface tension measurements demonstrated a positive synergistic effect between n-OPA and OHA. DFT calculations revealed that the intermolecular interaction energies between n-OPA-OHA and n-OPA −1 -OHA were 41.5 and 32.8 kJ/mol, respectively, primarily attributed to hydrogen-bonding between them.
✓ 已验证
产品关联
DOI
高影响因子
CURRENT APPLIED PHYSICS
·
2020
·
IF 2.281
Yanqun Chen,Chao Wang,Zheng Ma,Lanwei Li,Shuyao Li,Jianli Wang
n-type Mg 3 Sb 2 –Mg 3 Bi 2 alloy shows as a potential new thermoelectric material (TE) and has been widely researched recently. The pure phase n-type Mg 3 · 20 (Sb 0·3 Bi 0.7 ) 1.99 Te 0.01 were prepared by adjusting Mg content with the Bi impurity phase being effectively suppressed. Then, Co element was doped into the pure phase and the electrical conductivity of samples were improved. With a high power factor of 20.3 μ W cm −1 K −2 for Mg 3·185 Co 0·015 (Sb 0·3 Bi 0.7 ) 1.99 Te 0.01 at 525 K. Additionally, it was found that the phonon scattering is enhanced due to the larger atomic mass of Co comparing to Mg and the lattice thermal conductivity is reduced. As a result, a high ZT value of ~ 1.03 at 525 K is achieved for the Mg 3·185 Co 0·015 (Sb 0·3 Bi 0.7 ) 1.99 Te 0.01 .
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Yi Zhang,Yachuan Shao,Cong Wang,Fei Yuan,Di Zhang,Zhaojin Li,Qiujun Wang,Huan Wang,Zhilin Hu,Bo Wang
Heteroatom doping has been proven to be an effective strategy to improve capacity and cycling stability of host materials by providing abundant defects and active sites for gust ions storage. Therefore, we synthesize N-doped porous carbon materials (NPC) and employ it as an anode for PIBs . The optimized NPC delivers a high capacity (284.9 mAh g −1 ), good rate capability, and long cycle lifespan (213.6 mAh g −1 at 2000 mA g −1 after 400 cycles). Through theoretical calculations, we further reveal that the improvement of electrochemical performance can be considerably ascribed to improved conductivity and adsorption energy induced by N doping .
✓ 已验证
DOI
高影响因子
COMBUSTION AND FLAME
·
2017
·
IF 3.663
Xiaojie Li,Xiaobin Huang,Hong Liu
It is challenging to efficiently ignite traditional liquid hydrocarbons when they are applied in extreme combustion conditions, e.g., scramjet combustor . In this study, the low-temperature ignition enhancement performance of fuel additives of various properties and concentrations in n-decane were investigated theoretically and experimentally. The theoretical results indicate that there exists an optimized relationship between the effective activation energy and vaporization rate. Based on the optimization study, a novel design method for composite fuel additives was proposed. With this method, a metallic organic compound blended with a low-boiling-point auxiliary , methoxydiethylborane/tetrahydrofuran (MDEB/THF) solution, was employed to modify the ignition performance of n-decane. Thermogravimetry analysis and droplet-hot plate impinging experiment were performed to characterize the vaporization rate, ignition temperature , and ignition delay time of n-decane-based hybrid fuels. The experimental results suggest that, at a high concentration of MDEB/THF fuel droplets, the minimal ignition surface temperature is reduced to 160 °C, which is approximately 500 °C lower than that of pure n-decane. The ignition delay time of the fuel droplet is diminished from 353 ms to 45 ms at a surface temperature of 500 °C. Moreover, controlling the low-temperature ignition performance of an n-decane-based hybrid fuels by mixing various proportions of the additive was confirmed to be feasible. The results obtained from this study are of great significance in jet propellant design.
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2026
·
IF 7.2
Jing Zhou,Bo Zhao,Jie Liu,Junhan Ruan,Li Lin,Yi Li
N -nitrosomorpholine (NMOR), as a highly carcinogenic N -nitrosamine, has been widely detected in urban sewer systems. NMOR ranged from 27.2 to 817 ng/L in winter, follow by summer (2.09–453 ng/L), in raw wastewater collected from pumping stations connected to a Wastewater Treatment Plant (WWTP). Especially in winter, NMOR was detected (200–295 ng/L) in the influent, with residue of 98.0–116 ng/L in the effluent. Therefore, it is necessary to control NMOR before the WWTP. However, the corresponding precursors and transformation mechanisms in sewer systems are not yet fully understood. This study has identified NMOR precursors in sewer systems by nontarget analysis combined with targeted analysis. NMOR formation was confirmed by nitrosation and chloramination through distinct pathways from a known (morpholine, MOR) and two unreported ( N -methylmorpholine, NMM and N -methylmorpholine- N -oxide, NMMO) precursors. In addition, NMM and MOR were detected up to 8.65 and 14.3 μg/L in raw wastewater, as well as up to 0.250 and 1.17 μg/L in the effluent. NMOR formation by chloramine could reach to 73.0 ng/L. This study demonstrated the extensive presence of NMOR precursors in raw and treated wastewater, in which new identified precursor NMM might significantly contribute formation of NMOR.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LIQUID CRYSTALS
·
2026
·
IF 1.6
Guang Hu,Lin Liu,Wei Qian,Baolong Zhang,Chenxi Li,Yu Wang,Xiaoyan Gao,Dandan Min,Lei He,Jinquan Wang,Huanjun Lu,Biao Zhang,Stephen M. Kelly
A novel carbazole-N-hexyl acrylate liquid crystal monomer was synthesised to compare its mesomorphic behaviour with several of its non-polymerisable analogues. The compounds exhibit nematic liquid crystalline properties driven by their core-driven molecular anisotropy, incorporating a rigid, highly conjugated molecular core with flexible aliphatic terminal groups. A hexyl chain was strategically incorporated at a lateral position to induce high solubility in organic solvents and lower the phase transition temperatures. Upon cooling, the photopolymerisable acrylate monomer transforms into a nematic phase at 95°C. Owing to a thermodynamically slow crystallisation process governed by high supercooling viscosity kinetics, the material enters an extensive phase coexistence regime below 46°C, where the marble texture and crystalline domains coexist down to −20°C. DSC analysis reveals a prominent cold crystallisation exotherm and a significant melting endotherm during the second heating cycle, with no observable exothermic peaks during the cooling scans. This behaviour contrasts sharply with its non-polymerisable analogues, which display conventional monotropic mesomorphism featuring a sharp melting peak upon heating, followed by distinct isotropic-to-nematic and nematic-to-crystalline exotherms upon cooling. The delayed crystallisation behaviour of the acrylate monomer may be attributed to suppressed crystal nucleation kinetics caused by molecular entanglement of the bulky terminal acrylate groups.
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Muhammad Javed Liaqat,Shahid Hussain,Jahirul Islam,Mohammed Mujahid Alam,Rajesh Kumar Manavalan,Xiangzhao Zhang,Junlin Liu,Guanjun Qiao,Guiwu Liu
Preparation of Co 3 O 4 -SnO 2 heterostructures via hydrothermal method. • Peculiar morphology with abundant active sites and wide surface area. • Enhanced gas response (R g /R a ) of 92.8 with excellent sensitivity. • Excellent response is attributed to rapid charge transfer across p-n heterojunction. The recent development of p-n heterojunction sensors has attracted significant interest in gas sensing applications due to their excellent charge transfer, more active sites, and lower operating temperatures. In this research, Co 3 O 4 -SnO 2 heterostructured composite has been developed and investigated as a highly selective sensor for nitrogen dioxide (NO 2 ). The gas sensing results demonstrated a remarkable response of 92.8 to 100 ppm NO 2 at the optimal operating temperature of 200 °C. The sensor was tested over a wide temperature range (50–300 °C), demonstrating exceptional performance, remarkable repeatability, and consistent baseline recovery. The Co 3 O 4 -SnO 2 heterostructure has excellent long-term stability and consistently reliable detection across varying humidity conditions. The sensor's enhanced sensitivity to NO 2 was validated with selectivity tests for other interfering gases. An improved method revealing the NO 2 sensing approach is proposed, supported by density functional theory calculations to investigate the diffusion efficiency of investigated gases at Co 3 O 4 -SnO 2 heterostructures. The results indicated that Co 3 O 4 -SnO 2 heterostructures are an excellent option for practical NO 2 detection under different environmental conditions. Download: Download high-res image (400KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Zhang Jiakang,Yan Wenjian,Peng Cheng,Zhu Mingzhe,Li Zhipeng,Jiang Haokun,Sun He,Lan Mengjiao,Ma Mingjun,Wu Weilin,Liao Yuanyuan,Yan Cui,Su Huaigang,Zhou Zhongmin
Tin dioxide (SnO 2 ) stands as a premier electron transport layer in n-i-p perovskite solar cells (PSCs), yet interfacial defect-induced carrier recombination and energy-level misalignment impede its commercialization. Herein, we engineer a multifunctional polymeric interlayer by introducing polymerizable dimethyldiallylammonium chloride (DADMAC) at the SnO 2 /perovskite interface. The densely cross-linked P-DADMAC network reinforces mechanical interlocking, enhancing interfacial adhesion and stress dissipation. Concurrently, chloride ions (Cl⁻) from P-DADMAC synergistically passivate defects at both the perovskite buried interface and SnO 2 surface, inducing a graded n + -type band bending. This energy-band engineering reduces the heterojunction energy-level offset by 0.24 eV, thereby facilitating efficient charge extraction and minimizing non-radiative losses. Consequently, n-i-p devices achieve a power conversion efficiency (PCE) of 26.34% with a fill factor (FF) of 85.84% (certified: 26.27%), while a 25 cm 2 module (active area: 14 cm 2 ) attains 22.03% PCE (FF > 80%). This work establishes a paradigm for interfacial multifunctionalization in high-performance photovoltaics.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2026
·
IF 4.6
Shi Qiu,Li Gang,Qin Hongmei,Shi Zhuqun,Xiong Chuanxi,Yang Quanling
Traditional cellulose films lack both effective UV-shielding and durable flame-retardant properties, limiting their use in transparent packaging and protective. In this study, a highly transparent, UV-shielding, and flame-retardant cellulose composite film was fabricated via a solvent-exchange route. Water-insoluble triphenyl phosphate (TPP) flame retardant was diffused through ethanol into regenerated cellulose (RC) gel prepared by NaOH/urea/H 2 O low temperature dissolving system, followed by post-treatment with 3-aminopropyltriethoxysilane (KH550) ethanol solution to improve the compatibility between TPP and RC and drying. The obtained PNSi-RC films exhibit visible-light transmittance exceeding 85% and demonstrate improvement in UV shielding capability. Moreover, the PNSi 7 -RC film achieved a limiting oxygen index (LOI) of 29 and a UL-94 V-0 rating, exhibiting good flame-retardant property. The films remained largely consistent flame-retardant performance after water exposure for 24 h, and the LOI values were almost no changes. This simple strategy can be scalable to the preparation process of other films for green flame-retardant packaging and protective.
✓ 已验证
DOI
高影响因子
POLYMER
·
2026
·
IF 5.1
Jing Huang,Zhen Yuan,Ziyuan Song,Xingliang Liu,Jianjun Cheng
The recent advances in the polymerization of N -carboxyanhydrides (NCAs) potentiated the biomedical applications of polypeptide materials. However, the two-stage kinetics in solvents with low polarity, such as dichloromethane (DCM), typically led to ill-defined polypeptides, as chains entered the faster propagating stage outpaced those remaining in the initiation stage and consumed most of the monomers. Herein, we reported the acetic acid (AcOH) and crown ether (CE) cooperative system to modulate the polymerization process, enabling accelerated and controlled synthesis of polypeptides. The sequential addition of AcOH and CE decoupled the initiating/early propagating stage from the later propagating stage, which guaranteed simultaneous chain growth, yielding well-defined polypeptides with predictable molecular weights and narrow dispersity. Specifically, AcOH attenuated the rate difference and enabled all polypeptides entering propagating stage simultaneously, generating α-helix for CE-catalyzed acceleration. This strategy advances the understanding of the two-stage kinetics in NCA polymerization and offers a robust synthetic route to polypeptide materials, thereby facilitating their downstream biomedical applications.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）