Advanced Energy Materials
·
2026
·
IF 25.5
Xue Ke,Yuanyuan Zhang,Fulai Qi,Qian Zhang,Xinqiang Wang,Yanxia Liu,Ke Wang,Jindou Shi,Zichao Shen,Mingchang Zhang,Yuanchao Yang,Fan Gao,Wengang Cui,Zhenglong Li,Yaxiong Yang,Lixian Sun,Jian Chen,Hongge Pan
Magnesium hydride (MgH 2 ) is widely regarded as a highly promising solid-state hydrogen storage material. However, its practical application is severely constrained by high operating temperatures and sluggish hydrogen absorption/desorption kinetics arising from multistep reaction energy barriers. Here, we rationally tailor a quinary Ti-based rutile-type high-entropy oxide to overcome these intrinsic limitations for the first time. The onset dehydrogenation temperature of the hybrid reduces to 195°C, which is 163°C lower than that of pristine MgH 2 . The composite releases 5.88 wt.% H 2 within 10 min at 250°C, accompanied by a 58% reduction in the apparent dehydrogenation activation energy. Moreover, a 1.84 wt.% H 2 uptake can be achieved within only 20 s at room temperature. The coexistence of various multivalent metal cations, lattice distortions, abundant defects, and oxygen vacancies in (TiNbCrTaFe)O 2 substantially reduces the multi-step reaction energy barriers during MgH 2 de/hydrogenation, enabling the overall kinetics to surpass those of all previously reported high-entropy catalyst-modified MgH 2 systems. This work expands the compositional design space and application scope of high-entropy oxides and provides a viable strategy for advanced hydrogen storage and catalytic systems.
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高影响因子
JOURNAL OF THERMAL SPRAY TECHNOLOGY
·
2026
·
IF 3.4
Zhang Yu,Zhou Ping,Liu Xiaomei,Liu Yi,Huang Jing,Wu Shuangjie,Saitoh Hidetoshi,Zhang Botao,Li Hua
Electrochemical chlorine evolution is a promising approach for antimicrobial and wastewater treatment. However, the large-scale applications of conventional electrodes are hindered by the high cost of precious metals and tedious thermal decomposition method. In this study, precious metal-free electrodes for chlorine evolution were fabricated via liquid plasma spraying technique using a Ti 0.35 V 0.35 Sn 0.25 Sb 0.05 feedstock solution with varying total metal concentration. Scanning electron microscopy combined with EDS elemental analysis showed that the coatings exhibited a loose and porous morphology, with Ti, V, Sn and Sb elements uniformly distributed throughout. X-ray diffraction analysis identified characteristic diffraction peaks corresponding to VO 2 , SnO 2 , Sb 2 O 5 and TiO 2 in the coatings. The electrocatalytic properties of the coatings were evaluated using multiple electrochemical techniques, and the electrode prepared using the 1.0 M feedstock solution demonstrated the best performance. Antimicrobial test showed that after 30-s electrolysis, the disinfection rates of simulated tap water against E. coli and S. aureus exceeded 88.1% and 96.8%, respectively, whereas for the 0.06 M NaCl solution, both pathogens were inactivated by over 99.9% within 15 s. Additionally, methylene blue degradation reached 98.4% after 45 min of electrolysis. This study provides a new strategy for producing low-cost chlorine-evolving electrodes with potential application in antibacterial and wastewater treatment.
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2026
·
IF 3.2
Xiao-Dong Kang,Zhi-Gang Zhu,Guo-Hua Zhang
This study proposed a two-step carbothermal reduction-carburization method for preparing high-quality (Ti, W)C solid solution powders. Through separating the carbothermal reduction deoxygenation from the carburization and solid solution process, stepwise precise control was achieved. Using TiO 2 , WO 3 , and carbon black as raw materials, deoxygenation and most of the solid solution reactions were first completed at 1500 °C under a carbon-deficient condition. Subsequently, precise carbon supplementation was conducted, followed by final carburization and solid solution at 1550 °C. The resulting powders possessed excellent characteristics including elevated purity, fine grain size, homogeneous morphology, and optimal dispersibility. High-frequency spark plasma sintering (HF-SPS) was employed subsequently to fabricate (Ti, W)C-based cermets. A systematic elucidation of the reaction mechanisms in the two-step method was conducted, and the effects of W content on the powder characteristics as well as the microstructure and properties of cermets were explored. Results demonstrated that the grain size of the synthesized powders gradually decreased as W content increased, and (Ti 0.69 , W 0.31 )C showed the finest average grain size (0.38 ± 0.12 μm). Increasing W led to a decline in both hardness and fracture toughness ( K IC ) of cermets. Cermet sintered from (Ti 0.88 , W 0.12 )C powder demonstrated optimal mechanical properties, and possessed a hardness of 2030 ± 21 HV 30 and a K IC of 10.35 ± 0.31 MPa m 1/2 , achieving an excellent combination of hardness and toughness.
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MATERIALS LETTERS
·
2026
·
IF 2.6
Mingyang Song,Zelin Meng,Songyang Li,Jianglei Hu,Xi Li
A bifunctional catalyst comprising ordered Ti-mesoporous silica supported H 3 PW 12 O 40 (PW/OMS-Ti) was synthesized via a one-pot hydrothermal method. The composite features well-dispersed Brønsted and Lewis acid sites within an ordered mesoporous framework. Under optimal conditions, the 0.5PW/OMS-Ti0.05 catalyst achieved 99.0% cellulose conversion with 67.0% total reducing sugar and 19.1% 5-HMF yields, demonstrating effective synergistic catalysis. The catalyst also exhibited excellent stability and recyclability over five cycles, highlighting its potential as an efficient solid acid catalyst for biomass conversion.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Bei-Chen Gao,Yu Tian,Run-Ping Liu,Yi-Xin Wang,Yang You,Wei-Ming Guo,Hua-Tay Lin
A two-step method including low-temperature pretreatment and high-temperature homogenization was developed to prepare high-purity (Ti 0.2 V 0.2 Ta 0.2 Nb 0.2 Hf 0.2 )(C 0.75 N 0.25 ) powder. In the first step, the reaction mixture was heated to 1450 ℃ to form intermediate carbonitride phases through carbothermal reduction-nitridation, and the second step at 1700 ℃ produced a single-phase high-entropy carbonitride. The powder prepared by single-step treatment at 1750 ℃ contained 2.28 wt% nitrogen and 0.18 wt% oxygen. In contrast, the two-step powder exhibited higher nitrogen content (2.45 wt%) and lower oxygen content (0.09 wt%), and the formation of a complete single-phase solid solution enabled accurate calculation of its composition (Ti 0.2 V 0.2 Ta 0.2 Nb 0.2 Hf 0.2 )(C 0.78 N 0.21 O 0.01 ). The ceramic prepared from the two-step powder achieved 99.8% relative density, with an average grain size of 4.58 ± 0.32 μm, a Vickers hardness of 22.73 ± 0.51 GPa, and a fracture toughness of 3.16 ± 0.30 MPa·m 1/2 , whereas the single-step ceramic reached only 86.5% relative density.
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Chemical Science
·
2026
·
IF 8.1
Siyuan Ren,Muhammad Abbas,Zhibin Xie,Zilin Lu,Jasim Yousaf,Muhammad Ishaq,Zhuanghao Zheng,Jun Zhao,Shuo Chen,Guangxing Liang
The development of efficient and stable photocathodes from earth-abundant materials is a critical challenge for photoelectrochemical (PEC) hydrogen production. While Cu2ZnSnS4 (CZTS) is a promising absorber due to its ideal bandgap and non-toxic constituents, its performance is plagued by severe interfacial recombination. This work addresses this limitation through the precise engineering of a zinc-titanium oxide (Zn,Ti)O electron transport layer (ETL) in Mo/CZTS/CdS/(Zn,Ti)O/Pt photocathodes. We systematically investigate the influence of atomic-layer-deposited (Zn,Ti)O on the heterojunction's microstructure, band alignment, and charge transfer kinetics. A suite of characterization studies reveals that a suitable ETL thickness forms a dense, conformal coating and establishes an optimal spike-like conduction band offset at the CdS/(Zn,Ti)O interface, which minimizes bulk and interfacial charge-transfer resistance. Consequently, the optimized photocathode achieves a remarkable photocurrent density of 29.2 mA cm−2 at 0 VRHE and a high half-cell solar-to-hydrogen efficiency (HC-STH) of 7.02%. This study demonstrates that fine control of composite ETLs is a powerful strategy to unlock the potential of CZTS and related earth-abundant absorbers for scalable solar fuel production.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Siqi Guo,Wei Feng,Qingyuan Wang,Ruichong Chen
Advanced tritium breeder materials with high lithium density, robust mechanical strength, and fine grain size are prerequisites for the safe and efficient operation of fusion blankets. While Li 2 TiO 3 -Li 4 SiO 4 biphasic ceramics have been developed to balance the trade-offs between single-phase breeders, achieving rigorous control over microstructure stability at elevated temperatures remains a challenge. In this work, a dual-optimization strategy combining solid solution strengthening and biphasic compositing was proposed. Novel Li 2 (Ti,Zr)O 3 -Li 4 SiO 4 ceramic pebbles with various phase ratios (Ti/Si atomic ratio = 1:0.5, 1:1, and 1:2) were successfully prepared for the first time. The introduction of Zr into the Li2TiO3 lattice serves as a grain growth inhibitor, while the Li 4 SiO 4 phase enhances sinterability. The results indicate that pure-phase and well-crystallized powders can be obtained at 700 °C. Interestingly, the addition of Li 4 SiO 4 was found to hinder the phase transition of Li 2 (Ti,Zr)O 3 effectively. Benefiting from the synergistic effect, the pebbles sintered at 1000 °C exhibit a refined grain size of <2 μm, significantly smaller than that of traditional Li 4 SiO 4 -based ceramics. Meanwhile, a satisfactory relative density of ∼82 %T.D. and a high crushing load of >70 N were achieved due to the improved sinterability. This study demonstrates that the Li 2 (Ti,Zr)O 3 -Li 4 SiO 4 ceramic, which integrates the advantages of structural stability from solid solutions and mechanical robustness from biphasic composites, holds great promise as a high-performance tritium breeder.
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高影响因子
POLYMER DEGRADATION AND STABILITY
·
2026
·
IF 8.1
Fei Li,Lixin Liu,Lei Song,Yunlong Sun,Shixue Ren,Lu Li,Rui Wang
The closed-loop recycling of plastics is crucial for polymer sustainability. Bio-based PEF can be depolymerized via glycolysis, but catalysts often exhibit low efficiency. In this work, a titanium-based metal-organic framework (MOF), MIL-125, was synthesized with optimized metal-to-ligand ratios (MIL-125-5 with a Ti/PTA ratio of 1:5) to achieve a high specific surface area of 1719.6 m 2 /g and abundant Lewis acid sites. This catalyst demonstrated exceptional performance in PEF polymerization, yielding a polyester with a M n of 3.7 ×10 4 g/mol, a PDI of 1.9, and low metal residue (176.6 ppm Ti content), under mild conditions (210 o C for esterification and 230 o C for polycondensation). Comprehensive structural and catalytic characterization of MIL-125 was conducted through a combination of advanced techniques. XPS confirmed the existence of crystallographically distinct Ti 3+ /Ti 4+ active sites. The N 2 adsorption-desorption isotherms indicate the presence of microporous and mesoporous structures, with a pore volume of 0.65 cm 3 /g. while TGA revealed exceptional thermal stability exceeding 300 o C. Furthermore, NH 3 -TPD and EPR spectroscopy revealed abundant Lewis acid sites and oxygen vacancies, respectively. These structural features demonstrated a strong correlation with catalytic activity, as further validated through DFT calculations. Remarkably, the same MIL-125 catalyst facilitated closed-loop recycling by enabling depolymerization of PEF via glycolysis at 180 o C and atmospheric pressure, followed by repolymerization without catalyst separation or purification. This process produced recycled PEF (rPEF) with an Mn of 2.7×10 4 g/mol and properties comparable to virgin PEF, underscoring the catalyst's reusability and efficiency. This study establishes MIL-125 as a green, high-performance catalyst for sustainable polyester production and recycling.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
JiaRui Fu,Chuan Wang,Shuai Jiang,Bing Li,Yujue Wang,Ming Lei,Qian Zhao
An Al/Ti dual-doping strategy constructs a P2-type layered oxide with synergistic dual-ion modification. • Al/Ti co-doping enlarges the c-axis spacing and stabilises the layered oxygen framework. • The cathode retains 90.55% of its capacity after 500 cycles at 100 mA g −1 . • The hard carbon full cell delivers good rate capability and long-term cycling stability. Layered oxide cathodes for sodium-ion batteries (SIBs) often suffer from structural degradation and increased interfacial resistance during prolonged cycling. In this research, an Al/Ti dual-doping synergistic strategy is employed on P2-type Na 0.8 Al 0.02 Ti 0.02 (Ni 0.4 Mn 0.6 ) 0.96 O 2 (NNATM) to simultaneously regulate both the bulk lattice structure and interfacial chemical behavior. Al/Ti co-doping enlarges the c-axis spacing, facilitating Na + migration, while the strengthened Al/Ti-O and TM-O bonding interactions stabilize the layered framework and improve interfacial stability during cycling. Electrochemical impedance spectroscopy characterizations confirm a 40% reduction in charge-transport resistance, verifying the promoted interfacial charge conduction capability of the electrode. The NNATM cathode exhibits outstanding electrochemical performance: it delivers a reversible specific capacity of 111 mAh g −1 at 0.1C, and a reversible capacity retention of 90.55% is achieved after 500 cycles at 100 mA g −1 . The investigation provides a reliable method to enhance the long-term stability and reversibility of SIBs cathode. Download: Download high-res image (240KB) Download: Download full-size image
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Materials
·
2025
·Vol. 18
·期 21
·4936
·
IF 3.2
Dan Qian,Yue Shen,Zhanli Geng,Binyu Zhao,Wandong Bai,Shiping Sun,Xiang Li,Jinbo Zeng,Shengdi Zhang,Yumin Wang,Xiufeng Ren
Driven by the demand for lightweight materials, magnesium has gained significant interest due to its abundance and low density. This study systematically investigated the effects of mechanical ball milling time and sintering temperature on the microstructure and mechanical properties of a powder-metallurgy-processed Mg-Al-Ti alloy. The results established a correlation between ball milling and sintering processes, demonstrating that regulating precursor powder characteristics effectively enhances sintering diffusion efficiency. By precisely controlling sintering temperature and powder particle size characteristics, the alloy achieved high density, hardness, and strength at relatively low temperatures, demonstrating comprehensive performance. Optimal properties were obtained at 420 °C sintering conditions: relative density of 98%, hardness of 172 HV, compressive strength of 367 MPa, and nanoscale Young’s modulus reaching 45.15 GPa. Further analysis indicated that intermetallic compounds formed during sintering contributed significantly to the hardness enhancement, with the strengthening mechanism primarily attributed to the synergistic effects of precipitation and solid solution strengthening. The work provides a theoretical basis for further development of high-performance materials by subsequent processing.
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PubMed
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 9
·6075-6086
·
IF 3.9
Xing Guo,Yaxiong Liu,Xiaodong Tian,Zechao Tao,Xi Yan,Zhanjun Liu
The state-of-the-art graphite foams (GFs) are afflicted by large bulk density and low thermal conductivity, restricting their practical application. To alleviate the above problem, herein, an issue-oriented scheme, i.e., an in situ titanium (Ti) assisted catalytic graphitization strategy was proposed by using AR mesophase pitch (ARMP) as a precursor. In a typical preparation process, the mixture of Ti and ARMP underwent a pressurized foam, carbonization, and graphitization procedure successively to obtain GFs. The results showed that the Ti content played an important role in the development of the graphitic microcrystal structure due to the catalytic graphitization of Ti. According to the XRD analysis and molecular dynamics (MD) simulation, we confirmed that Ti promoted graphitization mainly by the generation of TiC during the high-temperature graphitization. The GFs obtained with 11 wt% Ti exhibited the most perfect graphitic crystal structure, with the highest graphitization degree. Thanks to the improved graphitization degree, the thermal conductivity of GFs increased with the added amount of Ti increasing from 0 to 11 wt%. The highest thermal conductivity of 60.8 W m−1 K−1 and the low bulk density of 0.36 g cm−3 could be achieved when the addition amount of Ti was 11 wt%. Meanwhile, apart from the optimization of thermal conductivity and bulk density, the compressive strength was also enhanced as the amount of Ti increased from 0 to 15 wt%. Our work provided a facile and scalable approach to preparing GFs with low density and high thermal conductivity.
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JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Jianling Huang,Hui Wang,Liuzhang Ouyang,Jiangwen Liu,Min Zhu
MgNi-based alloys have high electrochemical capacity as anode of nickel-metal hydride (Ni/MH) battery (≥500 mAh g −1 ). However the capacity decay seriously in charge-discharge cycling, which is previously ascribed to the corrosion of Mg. To solve this problem and reveal the related mechanism, the electrochemcial properties of Mg 0.50 Ni 0.50 , Mg 0.45 Ti 0.05 Ni 0.05 and Mg 0.40 Ti 0.10 Ni 0.50 alloys are studied in combination with their hydrogen storage properties and microstuctural evolution during cycling. This work demonstrates the amorphous phase in milled Mg 0.45 Ti 0.05 Ni 0.50 and Mg 0.40 Ti 0.10 Ni 0.50 alloys has higher resistance to hydrogenation-induced crystallization than milled Mg 0.50 Ni 0.50 alloy. Thus, they show better hydrogen absorption/desorption reversibility and contribute to the reversible electrochemical capacity. Therefore, the cycle performance of the Mg 0.50 Ni 0.50 alloy electrodes shows obvious improvement after partially substituting Mg by Ti. The capacity retention rate increases from 24.0% (Mg 0.50 Ni 0.50 ) to 55.7% (Mg 0.40 Ti 0.10 Ni 0.50 ) after 30 cycles. In addition, the Ti addition results in the formation of TiNi phase, and thus, the alloys show better electrochemical reaction kinetics and their high-rate dischargeability (HRD) is significantly improved. At 300 mA g −1 , the HRD values of Mg 0.50 Ni 0.50 , Mg 0.45 Ti 0.05 Ni 0.50 and Mg 0.40 Ti 0.10 Ni 0.50 alloys are 41.7%, 83.7% and 90.3%, respectively. At higher discharge current density of 1200 mA g −1 , the HRD values are 26.7%, 34.8% and 46.2%, respectively.
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危险品化学品经营许可证（带存储）