CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Lili Li,Pingan Chen,Yingli Zhu,Fu Chen,Mengke Qiao,Xiangcheng Li,Renchao Che
A lattice distortion strategy is employed to tailor the electronic structure. • Electron localization and enhanced dipole moment delay polarization relaxation. • Lattice distortion prolongs the relaxation time by 33.5%. • Absorption peak shifts to X-band with a reflection loss of −50.6 dB. The high electrical conductivity of transition metal borides gives rise to Ku-band dielectric resonance and loss, while causing poor microwave absorption at the X-band. Here, we design a high-entropy (Ti 0.2 Mo 0.2 Nb 0.2 Ta 0.2 Hf 0.2 )B 2 to regulate the electronic structure via lattice distortion engineering, which retards the polarization kinetics and induces a significant redshift of the dielectric response from the Ku-band to the X-band. The results indicate that the (Ti 0.2 Mo 0.2 Nb 0.2 Ta 0.2 Hf 0.2 )B 2 exhibits atomic-scale dislocations (10–16°) between the boron and metal layers. These lattice defects reduce the projected density of states near the Fermi level by 40–50% and promote electron localization. Simultaneously, atomic displacements of 0.0408 Å and 0.1267 Å along the a and c-axes yield an 8.6% enhancement in the dipole moment, which raises the energy barrier for dipole reorientation. And the increased lattice distortion slows the polarization relaxation time (τ) of the boride by 33.5%. As a result, the absorption peak frequency shifts from Ku to X-band and the corresponding RL min increases from −28.6 dB to −50.6 dB. This work establishes a strategy for controlling the dielectric response frequency and absorbing properties at the lattice and atomic scale. A high-entropy strategy is employed to engineer lattice distortion in transition metal borides. The resulting atomic-scale defects promote electron localization and enhance the dipole moment, which delays polarization relaxation. This effect prolongs the relaxation time (τ) by 33.5%, which leads to a shift of the absorption peak to the X-band and a reflection loss of −50.6 dB, establishing a fundamental design principle for controlling absorption frequency. Download: Download high-res image (161KB) Download: Download full-size image
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高影响因子
CHEMISTRY OF MATERIALS
·
2026
·
IF 7.1
Guo Ao,Yang Si,Chi Yang,Zhang Yu-Xuan,He Tianwei,Ran Mao-Yin,Guo Sheng-Ping
Breaking the rigid centrosymmetric (CS) shackles of rare-earth
thiophosphates remains a significant challenge for designing high-performance
mid-to-far-infrared (MFIR) nonlinear optical (NLO) materials. Herein,
using the CS LiEuPS 4 ( I 4 1 / acd ) as the structural template, a noncentrosymmetric (NCS)
rare-earth thiophosphate AgEuPS 4 ( Ama 2)
can be successfully synthesized via the flux-assisted metal oxide–boron–chalcogen
(MOBQ) solid-state method. This structural transformation is driven
by the “microscopic distortion cascading” strategy.
Quantitative distortion index evaluation validates that the introduction
of soft d 10 -configured Ag + cations induces severely
deformed [AgS 4 ] tetrahedra, which function as highly efficient
“microscopic chemical levers” to propagate intense localized
lattice strains to neighboring [EuS 8 ] and [PS 4 ] units. AgEuPS 4 achieves an exceptional balance among
critical NLO performances: it delivers a strong phase-matchable NLO
response of 2.3 × AgGaS 2 , an enhanced laser-induced
damage threshold (2.0 × AgGaS 2 ), and a moderate experimental
birefringence of 0.101@546 nm. Theoretical analyses reveal that the
macroscopic asymmetry originates from the cooperative superposition
of local polar vectors. This work provides an efficient avenue for
discovering outstanding NCS functional materials through precision
engineering of local lattice strains.
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Journal of Materials Research and Technology-JMR&T
·
2026
·
IF 7.3
Jun'ao Chen,Wenbin Jin,Fang Cheng,Yuxi Yao,Jingyan Zhou,Xutao Huang,Rui Wang,Wenbin Qiu,Pingzhan Si,Qiong Wu
Organic acid doping can enhance the current-carrying capacity of MgB 2 superconductors but may induce cracking and fracture due to microstructural degradation. In this work, MgB 2 bulks with different malic acid doping levels were investigated by combining experimental characterization with cohesive zone model-based RVE simulations to clarify the competition between flux-pinning enhancement and porosity-induced degradation. Increasing malic acid content promoted carbon substitution and lattice distortion, as indicated by the contraction of the MgB 2 lattice parameter a from 3.083 to 3.074 Å and the increase in lattice strain from 0.00202 to 0.00263. The 10 wt% sample exhibited the highest magnetic critical current density among the doped samples, reaching 1.9 × 10 4 A cm -2 at 20 K and 2 T. However, the porosity increased from approximately 6-7% at low and intermediate doping levels to 11% at 10 wt%, leading to stronger stress concentration and intergranular damage. The grain-boundary damage variable D GB decreased to 0.273 at 5 wt% but increased to 0.436 at 10 wt%, indicating a transition from second-phase-assisted crack suppression to porosity-dominated degradation. These findings provide a theoretical basis for managing sintering-induced damage in MgB 2 superconductors, highlighting the balance between performance enhancement and structural integrity during organic doping.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Chong Wan,Suhang Chen,Li Ding,Qingguang Zhu,Qilong Yan,Fengqi Zhao,Kangzhen Xu
To address the challenges of nano-active component agglomeration and incomplete energy release of boron/copper oxide metastable intermixed composites (B/CuO MICs). In this work, the energetic polyvinyl pyrrolidone- nitrocellulose- cyano modified graphitic carbon nitride semi-interpenetrating-polymer-networks (PVP-NC-g-C 3 N 4 -CN sIPNs) were constructed and utilized as substrate to fabricate high energy B/CuO MICs, in which the nanoparticles can evenly disperse on the constructed sIPNs via various covalent and non-covalent interaction due to strong polar of cyano group. The constructed sIPNs can maximize the interface contact area between nano-sized B and CuO particles, and supply more active sites for exothermic redox reaction. Meanwhile, the generated gases will blow away the formed molten B 2 O 3 and other impurities, thereby facilitating interface contact between active B core and oxygen. Thus, the B/CuO shows the highest combustion heat value (10743.8 ± 191.7 J·g −1 ) when the contents of PVP, NC and g-C 3 N 4 -CN-2 are 1.25 wt%, 5.0 wt% and 5.0 wt%, respectively, and the calculated B combustion efficiency greatly increase from 25.9% to 99.6%. Besides, the thermal stability, microwave ignition delay times, burn rate, maximum pressure and pressurization rate values were also evaluated and compared with the effect of PVP-NC and PVP-NC-g-C 3 N 4 on B/CuO. This work will improve the application of B-based MICs in the fields of military and civilian.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yijie Zhang,Kean Chen,Caixia Zhu,Yanxia Wang,Yongjin Fang,Zhongxue Chen,Yuliang Cao
Hard carbon is currently the most widely used anode material for sodium-ion batteries (SIBs), but its practical application is still limited by low Coulombic efficiency and the difficult trade-off between high capacity and low-cost production. As a light element, boron is an attractive candidate for SIB anodes owing to its high theoretical capacity, low cost, and non-toxicity. However, boron has shown intrinsically low Na-storage activity in previous studies. Herein, we propose a ternary synergistic activation strategy to activate the electrochemical Na-storage activity of a boron-rich carbon‑oxygen hybrid composite. In the hybrid network, synergistic B–O–C and B–C bonds construct a continuous three-dimensional framework that integrates high electronic conductivity, strong ion affinity, abundant defect sites, and hierarchical mesoporosity, thereby providing sufficient active sites and fast ion-transport pathways. Benefiting from this activation strategy, the boron-rich carbon‑oxygen hybrid framework (BBaC) delivers a high reversible capacity of 333.4 mAh g −1 and excellent rate capability (107.8 mAh g −1 at 4.0 A g −1 ) in SIBs, together with excellent cycling stability over 800 cycles. Notably, BBaC also exhibits superior electrochemical performance in lithium-ion batteries. This work provides a new ternary synergistic activation strategy for developing boron-rich composites as advanced anode materials for alkali-ion batteries.
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MATERIALS & DESIGN
·
2025
·
IF 7.9
Wojciech Polkowski,Paolo Lai Zhong Lo Biundo,Jianmeng Jiao,Maria Wallin,Adelajda Polkowska,Filip Kateusz,Merete Tangstad
New ternary Fe-Si-B alloys were developed as potential metallic phase change materials (PCMs) for application in ultra-high temperature latent heat thermal energy storage systems (LHTES). By a thermodynamic re-assessment of the Fe-Si-B system, three new Si-rich (approx. 40–50 wt%) compositions were pre-selected for further analyses. The new alloys can provide very high energy density (even above 1 MWh/m 3 ) at melting temperatures around 1150–1200 °C. Furthermore, new PCM candidates have twice lower B content than already developed Fe-26Si-9B alloy, what is beneficial from the economic point of view. For the sake of experimental validation, the PCM candidates were produced by the arc melting technique. The outputs of thermodynamic calculations were verified in detailed microstructural studies and differential scanning calorimetry experiments. In the case of the newly developed Fe-46Si-5B and already designed Fe-26Si-9B alloy, the energy density higher than 1 MWh/m 3 was experimentally confirmed.
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APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Xiaoling Chen,Yujuan Lu,Hui Li,Hongwei Mi,Guoqiang Zhang
Non-radiative recombination is the key bottleneck to overcome the charge separation problem. Here, we use poly(heptazine imide) (PHI) as a model photocatalyst to investigate the effect of internal electric field (IEF) on non-radiative recombination. Introducing electron-deficient boron atoms into the PHI structure leads to an uneven distribution of in-plane charges, spontaneously polarizing the formation of an IEF. This enhanced IEF can exert a force on the carrier in the opposite direction of the Coulomb force, thus effectively weakening the carrier trapping by the charged defect, thereby suppressing the non-radiative recombination. This is the first systematic research of suppressing non-radiative recombination by IEF in photocatalysis, which provides guiding strategies for addressing the bottleneck of charge separation in photocatalysis.
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FUEL PROCESSING TECHNOLOGY
·
2025
·
IF 7.7
Mengxiong Li,Chuxiang Sun,Qingyu Li,Qingchun Yang,Hongxin Wang,Xu Xu
This research investigates the combustion behavior of aluminum and boron loaded gel fuel droplets (10–20 wt%) under high-temperature and high-pressure conditions. High-speed and color imaging captured the combustion process. The addition of gellant induces micro-explosions that enhance the burning rate; however, increasing particle concentration weakens this effect. At high concentrations, early particle shell formation hinders gel layer development, suppressing micro-explosions. Both micro-explosions and particle shells promote liquid-phase combustion. At low concentrations, micro-explosions dominate the enhancement, while at high concentrations, larger, early-formed particle shells are the primary contributor. Increasing ambient pressure reduces micro-explosion intensity but shortens ignition delay and raises the burning rate. Under high pressure, weak micro-explosions offer less enhancement and lead to larger particle agglomerates. Aluminum and boron gel droplets show similar liquid-phase behavior, but differ in particle combustion: aluminum ignites under all conditions, while boron requires higher pressures. The combustion process of high-concentration gel droplets under elevated conditions is divided into four stages: Stable Combustion, Particle Shell Formation, Particle Agglomerate Ignition, and Molten Particle Combustion. This staged model emphasizes the dominant role of particle shells, with minor contributions from micro-explosions.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Qinghao Yang,Xingjiang Hua,Chaofan Quan,Hua Wang,Li Wang,Hairui Xing,Junzhou Yang,Qiang Wang,Ping Hu,Kuaishe Wang
Molybdenum alloy plates were prepared via powder metallurgy and the rolling process, and their microstructure and mechanical properties at room temperature were characterized. The results indicate that the grain size of the molybdenum alloy is significantly refined as the boron content increases. The Mo-1.0B alloy exhibited substantial grain refinement, with an average grain size of 7.12 μm representing a 42.6% reduction compared to 12.41 μm of undoped molybdenum. Microstructure and EBSD analyses demonstrate that boron doping effectively inhibited the recrystallization process in the Mo alloy. Notably, compared to previously studied molybdenum alloys, the newly developed alloys exhibit an unprecedented breakthrough in both strength and plasticity: the ultimate tensile strength of the rolled Mo-1.0B alloy plate reaches 1016.6 MPa, with a total elongation of 8.6%, significantly surpassing that of the 916.3 MPa and 6.5% of pure molybdenum. After annealing at 1200 ℃, the ultimate tensile strength of the rolled Mo-1.0B alloy plate reaches 532.5 MPa, with a total elongation of 67.4%, markedly higher than that of the 505.3 MPa and 46.9% of pure molybdenum. The excellent mechanical properties are primarily attributed to solid solution strengthening, dislocation strengthening, and grain boundary strengthening of Mo-B. Additionally, a quantitative strengthening model correlating strength, dislocation density, solid solution strengthening, and grain size was established, clarifying the strengthening mechanism.
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Xianxian Sheng,Tianliang Wang,Guilu Zeng,Xiang Zhang,Mudassir Habib,Shuguang Lyu
In the advanced oxidation process (AOPs) induced by sodium percarbonate (SPC), reactive oxygen species (ROS) can be scavenged by a large amount of dissolved Fe(II) released within a short time. To address this issue, a slow-release Fe(II) process is proposed in this study, thereby enhancing the degradation of contaminants. SPC/Fe(III)/amorphous boron (B) and SPC/Fe(III)/citric acid (CA) procedures were employed to remove polycyclic aromatic hydrocarbons (PAHs), with B as the reductant and CA as the chelator. Fluoranthene (FLT) removal in SPC/Fe(III)/B process contributed to HO•, while HO• and O 2 − • were responsible for FLT degradation via SPC/Fe(III)/CA system. SPC/Fe(III)/CA system exhibits more adaptability to intricate water quality circumstances compared to SPC/Fe(III)/B system. The bio-toxicity of FLT and their degradation intermediates was evaluated via the Toxicity Estimation Software Tool (T.E.S.T.), revealing a reduction in oral rat LD50, developmental toxicity, mutagenicity, and bioconcentration factor of the degradation intermediates relative to FLT. Both amorphous B- or CA-assisted SPC/Fe(III) processes were shown to be eco-friendly through luminosity inhibition tests with Vibrio fischeri . Experiments on soil slurry revealed that SPC/Fe(III)/CA system was feasible for the removal of complex PAHs, directing the SPC-induced AOPs process for the remediation of PAHs contaminated soils and groundwater.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2026
·Vol. 109
·期 1
·e70521
·
IF 3.8
Yonghui Yu,Limeng Liu,Yinbo Zhao,Yongchao Jin,Jie Wei,Xianghui Yan,Jian Ye,Biao Zhang,Yujin Wang
Synthesis and optimization of tantalum monoboride (TaB) ceramics were investigated to address a gap in the literature where TaB-based bulk ceramics are underexplored despite their predicted excellent mechanical properties. The main focus was put on evaluating influence of extra boron (0.85–1.5 at%), silicon carbide (3–15 wt%), and silicon nitride (1–15 wt%) additions on densification, phase purity, microstructure, and mechanical performance of the TaB ceramics. In the study, a Ta+B powder mixture for stoichiometric TaB was consolidated via reaction reaction hot pressing (RHP) at 1800°C and 1900°C under 30 MPa for 1 h. Because it yielded poor densification (∼62% relative density) and undesirable impurity phases, various processing routes were tried to obtain the desired TaB ceramic, the methods including (i) using B additive and C (introduced as impurity by wear of milling ball coating) to eliminate the minor oxygen-related impurities TaC and Ta 2 O, (ii) using SiC/Si 3 N 4 to deoxidize the reaction system and reinforce the TaB composites, and (iii) using RHP versus spark plasma sintering (SPS) to compare effects of sintering temperatures and time. Thermodynamic analysis was done to facilitate understanding phases formation. The results showed that densification was improved by additions of 0.85–1.5 at% extra B in combination with SPS at 2100°C under 40 MPa for 10–30 min, but the minor impurity phase TaC or Ta 2 O remained. Additions of Si 3 N 4 at 3 wt% and above emerged as effective, achieving near-full density (>97% relative density) and good mechanical properties, with Vickers hardness, flexural strength, and fracture toughness reaching 26.1 ± 1.3 GPa, 705 ± 45 MPa, and 4.40 ± 0.19 MPa·m 1/2 , respectively. Residual oxygen seemed to have been collected in Si 3 N 4 -Si 2 N 2 O aggregates due to the formation of minor Si 2 N 2 O, a beneficial situation, leaving clean TaB grain boundaries for possible better mechanical performance of the TaB-Si 3 N 4 composites at high temperatures. In contrast, SiC addition cannot be recommended because it promoted impurity phases (e.g., TaC, TaSi 2 , Ta 5 B 6 , and Ta 3 B 4 ) and failed to enhance densification (RHP at 1800°C under 30 MPa for 1 h) at low content of SiC additions <5 wt%, while the aimed TaB was completely missed at 5–15 wt% SiC additions.
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高影响因子
FUEL
·
2026
·
IF 7.5
Xinglong Liu,Zhenxiong Wang,Jianbin Li,Qingguang Zhu,Suhang Chen,Kaichuang Zhang,Manhui Wei,Fengqi Zhao,Kangzhen Xu
Boron (B) powders are widely utilized as energetic materials (EMs) due to high combustion calorific value, but the oxide layer (B 2 O 3 ) that adhering on active B core results in long ignition delay time and low combustion efficiency. For solving the negative influence of B 2 O 3 and promoting the combustion performances of B powders, a simple solvent-evaporation self-assembly (SESA) method was employed to guide B particles adhere on the surface of BiF 3 nanosphere, where BiF 3 nanosphere was synthesized by hydrothermal method and nitrocellulose (NC) was used as binder. Then the structural and combustion properties of prepared samples were characterized and investigated by various technical methods. The results reveal that B/BiF 3 /NC (NC: 5 wt%) exhibits the highest calorific value ( Q v = 15.85 ± 0.059 kJ·g −1 ) compared to B/CuO/NC, B/Bi 2 O 3 /NC and B/Co 3 O 4 /NC, which is 1.81 times that of original B/BiF 3 (8.74 ± 0.050 kJ·g −1 ). Moreover, B/BiF 3 /NC shows superior pressurization rate (33.82 ± 2.02 kPa·ms −1 ), moderate combustion process and adjustable combustion rate. This study offers an effective method to improve the combustion of B powders.
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