SUPERCONDUCTOR SCIENCE & TECHNOLOGY
·
2025
·Vol. 38
·期 7
·075014
·
IF 4.2
Manikandan Krishnan,Jiaojiao Meng,Bai-zhuo Li,Yanmei Ma,Cao Wang,Dilip Bhoi,Yoshiya Uwatoko,Qiang Jing,Bo Liu
Structural, superconducting ground state, and normal state properties on Re-Os-W-Mo-Ta high-entropy alloys (HEAs) were investigated using powder x-ray diffraction, magnetization measurements, electrical resistivity analysis, and specific heat measurements. The structural phase transformation was found to develop through compositional variations of the primary elements of HEAs, leading to the formation of phases such as bcc-type Re23Os5W33Mo34Ta5, σ-type Re31Os18W23Mo23Ta5, and α-Mn-type Re33Os34W11Mo11Ta11. These impurity-free samples, displaying a single-phase structure, exhibit bulk superconducting behavior. Low-temperature specific heat analysis indicates that the bcc-type and σ-type HEAs exhibit weakly coupled, whereas the α-Mn-type HEA exhibits strongly coupled, isotropic and fully gapped superconductivity. Moreover, the stability of bcc-type, σ-type, and α-Mn-type HEAs is significantly influenced by key factors such as valence electron count and electronegativity differences. This study presents observations of structural transformations in HEAs driven by compositional variations without the introduction of additional elements, providing significant insights into the correlation between structural changes and superconducting properties in highly disordered systems.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123941
·
IF 7.5
Mengyuan Yang,Yanling Li,Temitope Fausat Ajibade,Ziang Zhou,Zhaoping Cai,Lixiang Li,Huali Tian
Covalent organic frameworks (COFs) are effective materials for water treatment membranes due to their tunable pore structures and high compatibility. While composite modification strategies combining plant polyphenol tannic acid (TA)-Fe³⁺ and COFs show great promise for TFC membranes, they typically involve organic solvents or complex pre-modification of the fillers. In this study, a green, fully-aqueous layer-by-layer (LbL) self-assembly strategy was employed to prepare TA-Fe(COF-LZU1)/PES membranes. By exploiting the inherent synergy between the rigid crystalline channels of COF-LZU1 and the adhesive TA-Fe network, this approach directly utilizes pristine COF-LZU1 without secondary modification. Unlike conventional methods, the entire process avoids organic solvents, offering a highly sustainable technical alternative. The incorporation of COF-LZU1 significantly enhanced the membrane surface properties, with surface roughness increasing from 17.0 ± 2.2 nm to 43.8 ± 8.5 nm and the water contact angle decreasing from 77.0 ± 1.6° to 20.0 ± 1.0°, thereby substantially improving the membrane’s hydrophilicity. The TA-Fe(COF-LZU1)/PES membrane achieved a pure water permeance of 35.85 L·m - ²·h - ¹·bar - ¹, representing a 11.5% increase over the TA-Fe/PES membrane. It exhibited excellent separation performance, achieving high rejections of 98.3% for Direct Red 80, and further demonstrated robust stability in mixed dye/salt solutions. In five-cycle bovine serum albumin (BSA) tests, the membrane exhibited improved antifouling durability, yielding a flux recovery ratio of 75.5%. Additionally, it operated stably across a pH range of 4–8. This green self-assembly approach provides a practical strategy for preparing composite membranes for dye wastewater treatment.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Chenyi Zhang,Zhenyu Wan,Jiangjie Zhang,Jinni Shen,Chengwei Qiu,Wenxin Dai,Zizhong Zhang
Dual-site Au/Ta-TiO 2 photocatalyst was designed to photocatalytic oxidative coupling of methane. • The incorporation of Ta as an n-type dopant TiO 2 , promoting the reduction of molecular oxygen to superoxide radicals (O 2 • − ). • Au nanoparticles effectively promoted C C coupling. • Au 1wt% /Ta 0.03 -TiO 2 achieved an ethane production rate of 25 mmol∙g −1 ∙h −1 with a C 2+ selectivity of 83%. The photocatalytic oxidative coupling of methane (OCM) offers a promising green route for carbon utilization but is hindered by low conversion rates and over-oxidation. Herein, we engineer a dual-site Au/Ta-TiO 2 photocatalyst that achieves high-performance OCM. The incorporation of Ta as an n-type dopant effectively modulates the electronic structure of TiO 2 , providing abundant localized electrons that promote the reduction of molecular oxygen to superoxide radicals (O 2 • − ). It subsequently participates in the oxidative cycle, ultimately regenerating water and thereby enhancing CH 4 activation. Meanwhile, Au nanoparticles serve as sites for methyl radical coupling, curbing over-oxidation. The concerted catalysis on these two sites leads to outstanding OCM performance. An optimized Au/Ta-TiO 2 catalyst yields a methane conversion rate of 25 mmol∙g −1 ∙h −1 and 83% selectivity towards C 2+ products in a flow reactor that exceeds most reported photocatalysts. This work provides new insights into achieving high-performance photocatalytic methane conversion by precisely driving oxygen activation. This work designs a Ta-doping and Au-loading dual-site TiO 2 photocatalyst to improve the selective conversion of methane to ethane under aerobic conditions for sustainable chemical production. Download: Download high-res image (133KB) Download: Download full-size image
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PubMed
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EUROPEAN POLYMER JOURNAL
·
2026
·
IF 6.8
Haixue Li,Meng Yan,Lisha Yin,Licui Zhang,Dongmei Li,Zhiyong Liu,Fangling Li,Zhongpeng Qiu,Lin Cui
Traditional wound dressings frequently exhibit issues such as inadequate adhesion to irregular wound surfaces, a tendency to induce secondary tissue damage, and limited multifunctionality, posing significant challenges in clinical practice. This study presents a novel injectable hydrogel dressing (CMCS/ODEX/TA/HNTs) that integrates multiple mechanisms, thereby imparting superior hemostatic, antioxidant and antibacterial properties. CMCS and ODEX form a reversible three-dimensional network via a rapid Schiff base reaction. Upon injection, these materials can rapidly gelatinize in situ, adaptively filling the cavities of complex wounds. TA serves as a multifunctional crosslinking agent, significantly enhancing the hydrogel’s mechanical strength, self-healing properties, antioxidant capacity, and broad-spectrum antibacterial activity through robust hydrogen bonds and covalent interactions. A crucial aspect of this enhancement is the incorporation of halloysite nanotubes (HNTs). By leveraging their excellent dispersibility in both the aqueous phase and polymer matrix, along with their unique tubular structure and high specific surface area, HNTs not only improve tissue adhesion and mechanical integrity but also promote platelet aggregation, facilitate the sustained release of bioactive factors, and markedly enhance the hemostatic effect. In vivo experiments on rat tail cut off and liver injury models have revealed that the hemostatic efficacy of CMCS/ODEX/TA/HNTs hydrogel surpasses that of commercial hemostatic sponges, ensuring swift hemostasis. In vitro studies have showcased its substantial antibacterial capabilities, while animal trials have further validated its superior hemostatic performance compared to conventional sponges. The synergistic combination of its multifunctional attributes, encompassing antibacterial, antioxidant, and highly effective hemostatic properties, presents a promising approach for managing wound infections. Particularly suited for challenging emergency scenarios, this hydrogel holds significant promise for clinical translation.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Panpan Du,Junqing Xiahou,Qinghong Meng,Xuejiao Wang,Qi Zhu,Ji-Guang Li
Garnet-type Li 6 (La 1- x Tb x ) 3 MZrO 12 (M = Ta, Nb; x = 0.02–0.06) phosphors were synthesized through solid-state reaction method. XPS and UV-vis spectroscopy analyses revealed that the Nb or Ta component exerted a profound influence on the bandgap energies and Nb/Ta valence states in the host lattice, with which the systematically varying excitation and emission behaviors of the two systems were comprehensively deciphered. It was found that the higher Nb Nb ′ and V O · · defects density and the narrower bandgap in Li 6 (La 1- x Tb x ) 3 NbZrO 12 were detrimental to the quantum efficiency and thermal stability of Tb 3+ luminescence due to the increased process of nonradiative recombination at Nb Nb ′ / V O · · defects and thermal ionization in conduction band. The Li 6 (La 0.95 Tb 0.05 ) 3 TaZrO 12 optimal phosphor showed quantum yields of ∼41 % under 257 nm excitation, a fluorescence lifetime of ∼1.15 ms, color coordinates of around (0.297, 0.586), and can retain as high as ∼79 % of its room-temperature emission intensity at 423 K. The investigation of the impacts of bandgap energies and defects on the luminescence properties provides insights into the fundamental material parameters of Li-stuffed garnet phosphors and offers a pathway for enhancing their luminescence properties.
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JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Xue Mingchen,Jin Liguo,Xu Junhao,Su Chaoying,Liu Xusheng,Fu Yaxian
CsPbIBr 2 inorganic perovskite films have become one of the photovoltaic materials with great development potential due to their excellent wet thermal stability and excellent photovoltaic performance, as well as relatively simple preparation process. However, the preparation process and film-forming mechanism of CsPbIBr 2 thin films are still immature, and the films are prone to structural defects such as pinholes and grain boundaries, resulting in poor film-forming quality. Here, in this study, the controlled preparation of CsPbIBr 2 films was achieved under additive-free conditions by regulating the humidity and temperature during the film-forming process in combination with the substrate preheating treatment (SPT) strategy, and the ambient temperature–relative humidity influence on the grain growth of CsPbIBr 2 ₂ was systematically explored to achieve the highest film coverage at 80–90 °C, and different surface topographies were obtained under different environments, CsPbIBr 2 films with different surface morphology, crystallinity, light absorption properties, and grain size were obtained under different environments. Notably, the CsPbIBr 2 films prepared at 20 °C, RH: 10% exhibited smooth and flat surface morphology, with larger grain size and fewer grain boundaries, and the corresponding carbon-based PSC devices achieved excellent photovoltaic performance, with the Jsc: 10.98 mA/cm 2 , Voc: 1.16 V, FF 0.55, and PCE of 6.95%.
研究领域:
光伏技术
·
材料科学
·
钙钛矿太阳能电池
·
薄膜制备
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International Journal of Applied Ceramic Technology
·
2024
·
IF 1.8
Shuaijun Yang,Mei Wang,Yetong Lv,Huilin Sheng,Yexia Qin
Oxidation resistance is crucial to the potential applications of high-entropy carbides (HECs) at elevated temperatures. Here, we realize the exploration of (Hf, Ta, Zr, Cr)C high-entropy carbides (HEC-TM, TM = Hf, Zr, Ta, and Cr) with good oxidation resistance by optimizing their compositions. To be specific, 21 kinds of HEC- x TM ( x = 0–25 mol%) samples are fabricated by a high-throughput ultrafast high-temperature sintering technique, followed by oxidation testing at 1673 K for 30 min. Among all the HEC samples, the as-fabricated HEC-0Zr samples are proved to possess the best oxidation resistance with an oxidation depth of only 53 µm. Further study on isothermal oxidation kinetics demonstrates that the as-fabricated HEC-0Zr samples follow a linear oxidation law. The good oxidation resistance of the as-fabricated HEC-0Zr samples is believed to result from the (Ta, Me) 2 O 5 phase with a low melting point, which can promote the densification of the oxide layer. This research opens up a new way for efficiently discovering new HECs for extreme applications.
研究领域:
材料科学
·
高温材料
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Hongyu Xu,Jingjing Zhang,Xue Lv
Due to their biocompatibility and tissue-like properties, hydrogels have garnered considerable interest in bioelectronics field. Nevertheless, their practical implementation is limited by factors such as inadequate mechanical strength, weak interface adhesion, and the lack of antimicrobial properties. To address these challenges, a novel conductive hydrogel was synthesized through free radical polymerization, incorporating laponite (LA), tannic acid (TA), polyacrylic acid (PAA), and polyacrylamide (pAAm). An innovative approach was employed to enhance LA's dispersion through ionic liquid (IL) in water through electrostatic interactions. The integration of TA, PAA, and PAAm with LA sheets via multiple hydrogen bonds resulted in excellent mechanical properties. The resulting P(AAm-AA)/IL-LA/TA hydrogel exhibits impressive characteristics, including a fracture stress of 0.44 MPa, a strain of 1800%. Notably, the hydrogel's TA component exhibits strong antibacterial activity against Staphylococcus aureus and Escherichia coli . This advanced hydrogel sensor effectively monitors human movements, displaying a gauge factor of 12.7. Furthermore, its versatile and conductive nature facilitates adhesion to a wide range of substrates, making it a promising candidate for applications in human activity monitoring, electronic devices, and medical health surveillance.
研究领域:
生物医学工程
·
材料科学
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Haimei Zhong,Yiwen Wang,Qinliang Jiang,Huali Tian,Cheng Jiang,Pei Han,Yingying Qin,Lixiang Li,Shuanglin Gui
The trade-off between permeability and selectivity, along with the issue of membrane fouling, has constrained the widespread application of ultrafiltration (UF) membranes in recycling rare earth wastewater. Here, we present the incorporation of tannic acid (TA) modified molybdenum disulfide oxide (O-MoS 2 ) as a functional enhancer to fabricate polyethersulfone (PES) based mixed matrix membranes through a nonsolvent induced phase separation (NIPS) approach. Compared to the unmodified PES membrane, the integration of TA-O-MoS 2 significantly improves the hydrophilicity, porosity in the mixed matrix membrane. By altering the concentration of TA-O-MoS 2 , the TA-O-MoS 2 /PES UF membrane achieves enhanced hydrophilicity and charge properties, resulting in a remarkable improvement in separation performance. Specifically, the optimized membrane M2 (TA-O-MoS 2 addition of 0.1 wt%) exhibits a water flux of 140.98 Lm −2 h −1 bar −1 and a PEG 20000 rejection rate of 91.00 %, representing increases of 180 % and 120 % over the control PES membrane, respectively. Notably, membrane M2 effectively retains 91.31 % of macromolecular organic compounds in rare earth wastewater, while permitting nearly complete passage of inorganic salts, for instance CaCl 2 (3.26 %) and MgSO 4 (4.84 %). Moreover, the TA-O-MoS 2 /PES membrane demonstrates robust antifouling properties and exceptional durability, indicating its significant potential for efficient treatment and resource recovery in rare earth wastewater.
研究领域:
材料科学
·
环境工程
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Frontiers in Materials
·
2021
·
IF 3.515
Zhao Fujian,Ji Xiongfa,Yan Yang,Yang Zhen,Chen Xiaofeng,Ma Limin
The repair of bone defects in load-bearing positions still faces great challenges. Tantalum (Ta) has attempted to repair bone defects based on the excellent mechanical properties. However, the osseointegration of Ta needs to be improved due to the lack of osteoinduction. Herein, tantalum–gelatin–methacryloyl–bioactive glass (Ta–GelMA–BG) scaffolds were successfully fabricated by loading BG in 3D-printed Ta scaffolds through a chemical crosslinking method. The results showed that the composite scaffolds have the ability to promote cell adhesion and proliferation. The incorporation of BG resulted in a significant increase in apatite-forming and osteogenesis differentiation abilities. In vivo results indicated that the Ta–GelMA–BG scaffolds significantly enhanced the osteointegration at the early stage after implantation. Overall, the Ta–GelMA–BG scaffolds are a promising platform for the load bearing bone regeneration field.
研究领域:
生物材料
·
组织工程
·
生物医学工程
·
骨科
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Tingting Liu,Jian Luo,Shangke Liu,Tongtong Li,Haolin Li,Lingyan Zhang,Wei Mu,Nan Zou
Neonicotinoid insecticides have been widely used due to their excellent systemic activity and high insecticidal activity, but the problems of low utilization rate and environmental risk have attracted widespread attention. Controlled-release technology is an approach to realize the efficient utilization of pesticides and reduce environmental pressure. In this study, clothianidin (CLO) controlled-release granules ( [email protected] TA (tannic acid)/Fe (III)) were prepared with TA/Fe (III) coordination chelate as the coating material. These granules exhibited the core-shell structure with 500–1200 µm of particle size, and had obvious release performance and hydrolysis behavior of coating materials. Pot experiments by root application showed that the [email protected] /Fe (III) showed balanced and lasting control efficacy to broad bean aphids. The plants have a stronger capacity for absorption and enrichment and a higher utilization rate of CLO for [email protected] /Fe (III), than those for 10% suspension concentrate (SC). One of the hydrolysates of coating materials, TA, a polyphenolic antioxidant, could improve the bioaccumulation amount and alleviating the oxidative stress response of CLO in plants. Our study illustrates that the controlled-release granules base on TA have efficient controlled-release properties and free radical scavenging performance that may eventually be used as pesticide carriers and antioxidants in the field of plant protection.
研究领域:
农业科学
·
农药科学
·
植物保护
·
环境科学
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PubMed
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 2.463
Jing Gao,Hao Yu,Liya Zhou,Ying He,Li Ma,Yanjun Jiang
Tannic-acid-templated magnetic mesoporous silica nanoparticles (TA-MMSNs) were synthesized for the first time. The TA-MMSNs were monodisperse spherical particles with a diameter of around 250 nm and a magnetization saturation value of 35.26 emu/g. The specific surface area of TA-MMSNs was 423.4 m 2 /g, and the diameter and cumulative volume of the pores were 9.349 nm and 1.071 cm 3 /g, respectively. The TA-MMSNs were used to prepare immobilized NHase (CLNHAs@TA-MMSNs) by forming cross-linked nitrile hydratase aggregates (CLNHAs) in pores of TA-MMSNs using glutaraldehyde as a cross-linker. CLNHAs@TA-MMSNs and free NHase had the same optimum pH (pH 7), and the optimum temperature of CLNHAs@TA-MMSNs (40 °C) was higher than that of free NHase (30 °C). Compared with free NHase, CLNHAs@TA-MMSNs exhibited improved thermal, pH, mechanical and storage stability. Furthermore, CLNHAs@TA-MMSNs was applied in production of nicotinamide, and yield of nicotinamide could reach more than 98%. The tolerance of CLNHAs@TA-MMSNs to high concentration of substrate was better than that of free NHase, and yield of nicotinamide could still reach 29.74% after seven cycles of reaction. The kinetic parameters were investigated and the results indicated a lower substrate affinity and catalytic efficiency of CLNHAs@TA-MMSNs in comparison with free NHase. This work demonstrated that TA-MMSNs could be efficiently employed as supports for enzyme immobilization.
研究领域:
生物化学
·
材料科学
·
酶工程
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危险品化学品经营许可证（带存储）