COMPOSITES PART B-ENGINEERING
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2026
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IF 14
Liang Zhou,Muhaiminul Islam Shakil,Jingyi He,Xiyue Zhang,Hongbo Wang
Metal-organic framework (MOF)-derived carbon materials exhibit significant advantages for microwave absorption applications, owing to their high electrical conductivity, structural tunability, and abundant intrinsic defects and heterogeneous interfaces. However, achieving an optimal balance between magnetic and dielectric losses remains challenging for most magnetic metal-based MOFs-derived absorbers. In this study, MIL-125(Ti) was prepared as a template, and TiO 2 @C-x composites were synthesized via a two-step pyrolysis method. Experimental results demonstrate that the pyrolysis temperature significantly affects the graphitization degree of the carbon matrix and the formation of TiO 2 nanoparticles, thereby playing a dominant role in the dielectric and microwave absorption properties of the investigated MIL-125(Ti)-derived core-shell TiO 2 @C composites. Notably, the TiO 2 @C-700 composite delivers an effective absorption bandwidth of 3.2 GHz in 9.2-12.4 GHz at a thickness of 2.01 mm. Therefore, the MIL-125(Ti)-derived TiO 2 @C composites fabricated in this study establish a viable and nonmagnetic strategy for designing tunable, lightweight, and high-performance MOF-derived microwave absorbers.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Junhao He,Duoduo Yang,Kaishen Chen,Yiping Cheng,Xuanling Luo,Xingyu Chen,Chengyun Zhang
Dual fs laser structuring creates hierarchical PDMS SERS substrates. • Secondary laser processing increases nanoscale roughness and hotspots. • Detection limitation down to 10 −10 M with high linearity. • Excellent uniformity (RSD 2.57%) and reusability (<4% decay). • Flexible substrate enables adhesive sampling on curved surfaces. Flexible and sensitive surface-enhanced Raman scattering (SERS) substrates are essential for real-world applications such as wearable sensors and on-site molecular detection. We developed two polydimethylsiloxane (PDMS)-based flexible SERS substrates via the replication of femtosecond (fs) laser-nanostructured titanium (Ti) templates: a single-processed Ti-Fs-PDMS substrate and a dual-processed Dual-Fs-PDMS substrate, the latter incorporating an additional fs laser treatment to enrich nanoscale surface features. Gold was thermally deposited onto the structured PDMS to introduce plasmonic enhancement. The dual-structured substrate exhibits higher roughness and hydrophobicity (water contact angle >130°). SERS performance was evaluated using Rhodamine 6G (R6G) and malachite green (MG), revealing high sensitivity with a detection limit as low as 10 −10 M for Dual-Fs-PDMS and excellent signal linearity (R 2 > 0.99). Furthermore, the Dual-Fs-PDMS substrate exhibits superior signal uniformity (RSD = 3.203%), reusability, mechanical robustness, and good long-term stability over 180 days, as well as the capability for in situ detection on curved surfaces. Three-dimensional electromagnetic field simulations based on AFM-acquired topography indicated that the Dual-Fs-PDMS substrate exhibits a stronger local electric field and a higher density of “hot spots”, correlating with its enhanced SERS performance. These results highlight the potential of Dual-Fs-PDMS as a flexible and high-performance SERS platform for practical applications. Download: Download high-res image (213KB) Download: Download full-size image
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Green Energy & Environment
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2026
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IF 16.7
Zhijun Wang,Kelei Zhuo,Mengya Yang,Li Sun,Dong Sun,Yujuan Chen,Jianji Wang
The trade-off between energy and power density remains a major hurdle for supercapacitors (SCs). This work demonstrates a substantial performance enhancement in aqueous hybrid supercapacitors through synergistic electrode and electrolyte engineering. First, titanium-doped nickel selenide nanospheres (Ti-Ni 0.85 Se) are successfully synthesized via a hydrothermal method using trace Ti 3 C 2 T x MXene as a controllable titanium source. The incorporated Ti atoms induce a slight lattice expansion and optimize the electronic structure, significantly improving the intrinsic conductivity and charge-transfer kinetics of the material. In a 3 mol L -1 KOH electrolyte, the Ti-Ni 0.85 Se electrode delivers a high specific capacity of 586 C g -1 at 1 A g -1 . Furthermore, introducing K 4 [Fe(CN) 6 ] as a redox-active additive provides additional Faradaic capacity via the reversible [Fe(CN) 6 ] 3-/4- couple, boosting the specific capacity of Ti-Ni 0.85 Se to 861 C g -1 . The assembled Ti-Ni 0.85 Se//activated carbon hybrid supercapacitor achieves a high energy density of 35.7 Wh kg -1 at a power density of 1156 W kg -1 , with 71.6% capacitance retention after 3000 cycles. This study validates the synergistic strategy of electrode doping and electrolyte modulation as an effective pathway to break the performance bottlenecks of supercapacitors.
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CERAMICS INTERNATIONAL
·
2026
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IF 6
Jia Wang,Zeru Wang,Chuanyao Dong,Kan Zhang
Titanium alloys are widely used in lightweight mechanical components, but their limited mechanical and tribological properties often lead to failure under service conditions. In this study, a titanium-based micro-arc oxidation (Ti-MAO) composite coating was developed by incorporating hexagonal boron nitride (h-BN) while optimizing electrolyte composition and process parameters. Proper control of h-BN content effectively improved the high-temperature oxidation resistance and tribological properties of the Ti-MAO coating. The research results showed that h-BN could regulate the energy distribution during MAO discharge, promote coating densification, and reduce structural defects. At a concentration of 4 g/L, h-BN maintained good dispersibility. Compared with an additive-free Ti-MAO coating, the h-BN/Ti-MAO composite coating showed an 86% reduction in the oxidation rate constant at 600 °C. Due to the stable layered structure of h-BN over a wide temperature range, the composite coating maintained a friction coefficient (COF) below 0.31 from room temperature (RT) to 500 °C, reduced to below 0.21 within 300 °C. However, excessive h-BN led to particle aggregation and a decline in overall coating performance. In summary, this approach enhances the durability of titanium alloy components through improved oxidation resistance and tribological properties.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Jinting Zou,Xiaohan Li,Yiqing Lv,Jinyan Yu,Ji Yang,Limei Cao
An N 2 -sintered Ti 4 O 7 @Ti cathode achieved >74% Hg 2+ removal in 5 h. • The Ti 4 O 7 @Ti cathode showed preliminary reuse performance in 10%H 2 SO 4 . • Ti 3+ /oxygen vacancies facilitate electron transfer and surface ·H formation. •Direct electron transfer dominated Hg 2+ removal, ·H played a secondary role. Highly toxic and bio-accumulative Hg 2+ can be electrochemically reduced to recoverable Hg 0 . However, preserving electrode integrity and corrosion resistance in strongly acidic media remains challenging. Magnéli-phase Ti 4 O 7 -coated electrodes were fabricated on Ti substrates. The optimized Ti 4 O 7 @Ti cathode, prepared by N 2 -protected sintering, preserved Ti 3+ species and oxygen vacancies, exhibiting a low charge-transfer resistance of 24.25 Ω and a high hydrogen evolution over-potential of −0.94 V vs. RHE. Under optimal conditions (3 V, 25 mm electrode spacing, 300 r·min −1 stirring), the cathode achieved >74.0% Hg 2+ removal within 5 h. Mechanistic analysis suggested that direct electron transfer was the primary Hg 2+ reduction pathway, with active hydrogen species as a secondary contributor. Detected Ti 3+ /oxygen vacancies may enhance interfacial electron transfer and surface active hydrogen generation. The electrode retains 68.0% removal after five cycles in 10%H 2 SO 4 . This work provides a stable Ti 4 O 7 -based cathode design for electrochemical Hg 2+ removal in strongly acidic media. Download: Download high-res image (294KB) Download: Download full-size image
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xingjie Su,Hongzhi Xiao,Linzhao Ma,Qianbiao Du,Hao Li
A series of Li 2 Mg 9 Ti 7- x O 24 (0.1 ≤ x ≤ 0.3) ceramic materials were synthesized via a conventional solid-state reaction. The influence of non-stoichiometric Ti-site content on sintering behavior, phase composition and dielectric properties was systematically studied. Rietveld-refined XRD patterns confirmed that the ceramics exhibited inverse spinel structures. The vibrational properties of the ceramic samples were analyzed using Raman spectroscopy. The results showed that an appropriate Ti-site deficiency (0.1 ≤ x ≤ 0.3) not only reduced the optimal sintering temperature by 40°C but also suppressed impurity formation, as evidenced by reduced minor XRD peaks. Notably, the Li 2 Mg 9 Ti 6.9 O 23.8 ceramic sintered at 1260°C for 4h achieved optimal microwave dielectric properties (MDPs): ε r = 16.25, Q×f = 71,104 GHz and τ f = –48.8 ppm/°C. Furthermore, a novel dielectric resonator antenna (DRA) was designed and simulated based on Li 2 Mg 9 Ti 6.9 O 23.8 ceramics. The DRA exhibited a gain of 6.42 dB and a bandwidth of 280 MHz, highlighting its potential for applications in microwave communication systems.
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PLoS One
·
2017
·Vol. 12
·期 2
·e0172043
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IF 2.806
Jiyu Li,Bin Liu,Yingying Zhou,Zhipeng Chen,Lelun Jiang,Wei Yuan,Liang Liang
Microneedle arrays (MA) have been extensively investigated in recent decades for transdermal drug delivery due to their pain-free delivery, minimal skin trauma, and reduced risk of infection. However, porous MA received relatively less attention due to their complex fabrication process and ease of fracturing. Here, we present a titanium porous microneedle array (TPMA) fabricated by modified metal injection molding (MIM) technology. The sintering process is simple and suitable for mass production. TPMA was sintered at a sintering temperature of 1250°C for 2 h. The porosity of TPMA was approximately 30.1% and its average pore diameter was about 1.3 μm. The elements distributed on the surface of TPMA were only Ti and O, which may guarantee the biocompatibility of TPMA. TPMA could easily penetrate the skin of a human forearm without fracture. TPMA could diffuse dry Rhodamine B stored in micropores into rabbit skin. The cumulative permeated flux of calcein across TPMA with punctured skin was 27 times greater than that across intact skin. Thus, TPMA can continually and efficiently deliver a liquid drug through open micropores in skin.
研究领域:
材料科学
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医学工程
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药物递送
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高影响因子
FUEL
·
2025
·
IF 7.5
Zhengyang Sun,Fei Xu,Shanguang Xu,Xin Han,Shanguo Du,Jie Zhang
The selective hydrogenation of furfural (FAL) to furfuryl alcohol (FOL), catalyzed by the industrially important Cu/Al 2 O 3 catalysts, represents a significant research focus in biomass valorization. In this work, the significant promoting role of Ti modification on the performance of Cu/Al 2 O 3 for this reaction was systematically investigated using a series of Cu-xTi/Al 2 O 3 (x = 1–15 wt%) catalysts. The results revealed that at low Ti loadings (<9 wt%), Ti species were highly dispersed, formed Ti–O–Al interfacial structures with the Al 2 O 3 support, effectively increasing the number of weak acid sites and oxygen vacancies. Importantly, Ti modification optimized the metal-support interaction, enhanced the electron density of Cu species through electron transfer, significantly improved the reducibility of Cu species, and promoted the formation of metallic Cu 0 . However, excessive Ti loading (>9 wt%) led to the formation of crystalline TiO 2 particles that blocked surface active sites. The Cu-9Ti/Al 2 O 3 catalyst exhibited the best performance, achieving 100 % furfural conversion and 100 % furfuryl alcohol selectivity under reaction conditions of 85 °C, 1.0 MPa H 2 , and 4.5 h in isopropanol solvent. In situ DRIFTS experiments confirmed that the reaction followed the pathway of selective carbonyl adsorption and hydrogenation, and the formed furfuryl alcohol underwent rapid desorption, avoiding over-hydrogenation. This work elucidates the dual role of Ti modification in enhancing catalytic performance by tuning support acidity and optimizing the Cu electronic structure, providing insights for designing high-performance non-noble metal hydrogenation catalysts.
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INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2025
·
IF 4.6
Siqi Zhao,Yongqi Lv,Ziwei Zhang,Jinglian Fan
Nano powder plays a key role in preparing high performance tungsten-based materials. It is necessary to synthesize powder with uniform element distribution, low impurity content, and fine particles for preparing higher performance tungsten-based materials with more uniform microstructure, with smaller grain size and higher densification. However, it is difficult to synthesize uniform oxide/carbide reinforced tungsten matrix composite powders with specific structure by traditional powder metallurgy method. In this manuscript, nano W-Y-Ti powders with core-shell structure were synthesized by organic chemical method. The average grain size of W-Y-Ti is 33.33 nm, which indicates the powder refinement is 1 order of magnitude compared with other methods. Moreover, due to the difference of Y 3+ and Ti 4+ , the Y phase tends to form core in W particle and the Ti phase tends to form shell around W particle in these powders synthesized by organic chemical method. This powder structure is conducive to in-situ dispersion of the reinforced phase during sintering and significantly improves the interface properties of the reinforced phase /W matrix phase. The W-Y-Ti composite prepared by SPS shows fine grain size (750 nm) and uniform distribution (Y 2 O 3 is distributed within the W grain, while Ti is distributed at the grain boundaries). It means the microstructure of the powder can be inherited to the bulk materials, which can improve the performance of these composites. This manuscript provides ideas and data basis for the synthesis and preparation of high-strength, tough and high-performance W-based composite materials.
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METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2026
·
IF 3.3
Chen Buxin,Li Yehui,Chen Mao,Liu Lingling,Ma Kaihui,Bai Chenguang,Hu Meilong
To support green transition of vanadium titanomagnetite blast furnace smelting, various low-carbon blast furnace atmospheres, including oxygen-enriched air injection (CO–N 2 ), oxygen-enriched H 2 -rich air injection (CO–H 2 ), and H 2 -rich air injection (CO–H 2 –N 2 ) were investigated to gain insight on the Ti(C,N) formation mechanisms. In this study, thermogravimetric analysis was first employed to investigate the kinetics of the TiO 2 reaction. Arrhenius-based kinetic modeling revealed that these reactions are primarily controlled by solid-state diffusion, and N 2 directly nitrides titanium oxides to TiN, and the activation energy decreases with increasing N 2 content. In contrast, H 2 lowers the activation energy of the reaction and promotes the reduction of TiO 2 to lower-valence oxides. Then, the carbothermic reduction of TiO 2 -bearing slags was investigated. Chemical composition analysis, XRD, and EPMA-WDS mapping demonstrated pronounced atmosphere-dependent variations in the formation of TiC/N phases. In CO–N 2 atmospheres, Ti(C,N) content decreases with increasing CO content and Ti(C,N) tends to agglomerate. With pure CO, only a few, sparsely dispersed TiC particles were detected. Whereas in CO–H 2 atmospheres, increasing the H 2 concentration markedly enhanced TiC formation, yielding uniformly dispersed particles with slight clustering. Therefore, the overall atmosphere effect on the amount of TiC/N formation follows the order: 100 pct CO < 80 pct CO–20 pct H 2 < 80 pct CO–20 pct N 2 < 60 pct CO–40 pct H 2 < 60 pct CO–40 pct N 2 < 30 pct CO–70 pct N 2 atmosphere (conventional blast furnace atmosphere). Graphical
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FUEL
·
2014
·
IF 3.406
Shuai Liu,Wei Zhou,Tao Yu,Ruijie Chai,Liming Lu,Renhe Yin
Layered nanoporous Ti/TiO 2 /Ni–W–B electrode is prepared through electrochemical anodization and electrodeposition for electrocatalytic reduction of coal. Extensive characterizations of the layered nanoporous Ti/TiO 2 /Ni–W–B electrode have been performed using techniques including scanning electronic microscopy, X-ray diffraction, inductively coupled plasma, Brunauer–Emmett–Teller and linear sweep voltammetry. The results indicate that the electrode, which presents layered nanoporous surface network, exhibits high activity for the reduction of coal. In an organic electrolyte system, a liquefaction yield of 51.8% is obtained after electrolysis of coal on the prepared electrode for 24 h at −1.7 V. The electroreduction mechanism of coal is also investigated. IR and 1 H nuclear magnetic resonance results show that active hydrogen (H ∗ ) reacts with functional groups in the coal such as C O, C O and C C, leading to the reduction of unsaturated bonds and the breakage of bridge bonds and part of aromatic rings during the electroreduction of coal.
研究领域:
材料科学
·
电化学
·
能源化学
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Nanoscale
·
2026
·
IF 5.2
Wenshuo Zhao,Yanzhe Zhang,Yong-Li Wang,Tong Wu,Yingying Zhang,Jingjing Sun,Xiangrong Liu,YONGJIE ZHAO
Fe-Mn based layered transition metal oxides are compelling candidates for sodium-ion cathodes owing to their high specific capacity and cost-effectiveness. However, their practical application is hampered by inherent challenges including the Jahn-Teller effect, lattice oxygen loss, transition metal dissolution. In this study, Al/Ti co-doped Na0.67Fe0.4Mn0.4Al0.1Ti0.1O2 (FM-AT) cathode is proposed and prepared. The introduction of Al/Ti, creating strong Al-O and Ti-O bonds, effectively stabilizes the lattice oxygen and elevates the reversibility of anionic redox reactions. Furthermore, the stability of the transition metal layer is effectively enhanced, suppressing transition metal dissolution and the P2-OP4 phase transition associated with TMO2 layer slippage at deep charge states. The FM-AT demonstrates excellent cycling stability, with a capacity of 137.1 mAh g-1 under 20 mA g-1 and a capacity retention of 85.5% after 50 cycles (55.7% for the pristine FM cathode). Even after 200 cycles under 200 mA g-1, a capacity retention of 72.1% is achieved (versus 20.9% for the FM). This work offers a novel method for enhancing the structural stability of iron-manganese based electrode and designing cost-effective, high-performance sodium ion cathodes.
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PubMed
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