MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jianhui Xin,Mengxia Yan,Zhuqing Wang,Xin Luo,Xue Yu,Jiangyang Mo,Jingqiao Guo,Jine Wang
Nanozymes have been widely used in the field of biosensing owing to their high stability, low cost and adjustable catalytic activity. It is of great value to develop methods to construct nanozymes and to study their application. Here, a bimetallic synergistic enhancement CuFe@TA nanozyme was obtained by a simple and environmentally friendly one-pot aqueous phase method, in which Cu 2+ and Fe 3+ were bound to tannic acid (TA) by the strong coordination. In this process, the polyphenols in TA have reducing property that ensure the formation of hetero-valent metal pairs (Fe 3+ /Fe 2+ , Cu 2+ /Cu + ), thus enhancing the conversion of H 2 O 2 into more reactive radical species. Notably, the synthesized CuFe@TA nanozyme exhibited higher oxidase-like and peroxidase-like catalytic activities than a single metal ion due to the synergistic effect of the two transition metal components. Besides, based on the cascade catalysis of glucose oxidase (GOx) and CuFe@TA nanozyme, a sensitive colorimetric sensing platform for glucose assay was constructed with a good linear range of 3.03 ∼ 363.6 µM and a calculated limit of detection of 2.59 µM. This as-developed method was applied to detect glucose in real human serums and juice drink samples sensitively and accurately, consistent with measurement results made by commercial glucose meters. This work broadens the species of nanozymes, and provides a more sensitive glucose detection platform in medical diagnostics and the food industry.
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高影响因子
RSC Advances
·
2024
·Vol. 14
·期 18
·12954-12965
·
IF 3.9
Thi Viet Ha Luu,Hong Yen Xuan Nguyen,Quoc Thang Nguyen,Quang Bac Nguyen,Thi Ha Chi Nguyen,Ngoc Chuc Pham,Xuan Dung Nguyen,Trung Kien Nguyen,Ngoc Nhiem Dao
This study attempted to improve the photocatalytic activity of zinc oxide (ZnO) semiconductors in the visible light region by introducing the co-doping of carbon (C) and tantalum (Ta) to ZnO (ZTC) using a simple hydrothermal method with the respective precursors. The obtained uniform ZTC nanoparticles with an average crystal size of 29.30 nm (according to Scherrer's equation) revealed a redshift with a decrease in bandgap (Eg) from 3.04 eV to 2.88 eV, allowing the obtained photocatalyst to absorb the energy of the visible light for photocatalysis. Furthermore, the Zn 2p and Ta 4f core level spectra confirmed the presence of Zn2+ and Ta5+ in the ZTC sample. In addition, the infrared spectra identified hydrogen-related defects (HRDs), while the O 1s spectra indicated the existence of oxygen vacancies (VO). Electrochemical tests revealed improvement in the electron conductivity and charge separation of the obtained materials. To follow, the photocatalytic performance assessment was conducted by varying the C/Zn2+ ratios (5, 10, and 15 mol%) in ZTC samples, the initial RhB concentration (7, 15, and 30 ppm), and the pH of the RhB solution (3.0–10.0). The photodegradation on ZTC samples showed the most effectiveness for a 7 ppm RhB solution with a C/Zn2+ ratio of 10 mol% in the slightly alkaline medium (pH 9.0). Additionally, ZTC also exhibited commendable durability after being reused several times. The nature of RhB photodegradation was proposed and discussed via a mechanism at the end of this work.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yang Liu,Jia-Ji Liang,Wei-Ming Guo,Chao Chang,Xiao-Ming Duan,De-Chang Jia,Hua-Tay Lin
High-temperature thermal stability plays a crucial role in the structural application of pressureless liquid-phase sintered SiC (PLS-SiC) ceramics. In this paper, a PLS-SiC ceramic processed with CeO 2 –Al 2 O 3 as sintering additives with excellent high-temperature thermal stability was achieved by incorporating (Hf, Zr, Ta, Nb, Ti)B 2 (HEB) particles. Results showed that PLS-SiC ceramics with HEB-free underwent a structural change from dense to porous microstructure after annealing at 1800 °C/1 h. Conversely, PLS-SiC ceramics with the addition of 10 vol% HEB exhibited excellent thermal stability, as evidenced by the retention of their dense microstructure after exposure to annealing at 1800 °C/1 h. The possible primary reasons for this significantly different response to the thermal stability could be probably attributed to fact that HEB reacted with CeAlO 3 and SiC to form solid-phase products, subsequently inhibiting the formation of gas-phase products after decomposition of CeAlO 3 alone in a high-temperature vacuum environment. In addition, the formation of a compact protective outer layer containing Hf–Ta containing diboride in PLS-SiC ceramics during the annealing process could effectively hinder the volatilization of volatile substances at a high temperature.
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Advanced Materials Technologies
·
2024
·
IF 6.4
Xiujie Guo,Wenjing Qin,Changshun Gu,Xinxin Li,Mengyao Chen,Hanlin Zhai,Xiangchuan Zhao,Hengchao Liu,Boxin Zhao,Yan Zhang,Yanli Wang,Shougen Yin
Conductive hydrogel is considered a promising wearable sensor material. Developing flexible conductive hydrogel sensors with stretchability, adhesion, and stability remains challenging. In this study, a transparent, self-adhesive, antifreeze, anti-UV, stretchable, conductive, and reusable hydrogel with polyacrylamide/glycerol/gelatin/tannic acid/Fe 3+ (PGGT-Fe 3+ ) structure is successfully constructed through a simple one-pot polymerization method. The PGGT-Fe 3+ hydrogel is composed of dual networks of polyacrylamide and gelatin for organic cross-linking, using water/glycerol as the dispersion medium, and incorporates a viscous substance: tannic acid, and a conductive substance: metal ions (Fe 3+ ). Due to the introduction of the abundant amino, carboxylic acid, and hydroxyl functional groups on gelatin and tannic acid, the PGGT-Fe 3+ hydrogel exhibits excellent and repeatable adhesion capabilities on various surfaces (including glass, metal, plastic, and pigskin) with maximum adhesion strength of 98 kPa when attached to pigskin. Furthermore, based on the stable conductive network and high conductivity, the hydrogel not only exhibits strain sensitivity, fast response, and stability but also can stably collect epidermal bio signals. In conclusion, this work provides a new approach to the design and development of next-generation multifunctional conductive hydrogels and opens up vast possibilities for their applications in the flexible electronics field.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xiangping Feng,Lei Zhang,Chao Li,Ming Shen,Runguo Zheng,Zhiyuan Wang,Hongyu Sun,Yanguo Liu
Cubic phase Li 7 La 3 Zr 2 O 12 (LLZO) is a promising electrolyte material for all-solid-state rechargeable lithium-ion batteries. The homogeneous densification of the garnet solid electrolyte ceramic material is crucial for enhancing its ionic conductivity performance. Herein, an Al/Ta co-doped strategy is employed to stabilize the cubic phase structure of LLZO and is combined with a two-step sintering method to enhance densification, in order to investigate its effect on microstructure, ionic conductivity, and electrochemical properties . During the formation process, amorphous Li 2 O reacts with doped Al 2 O 3 to create a Li–Al–O liquid phase at the grain boundaries. Combined with two-step sintering to ensure that the desired material transformation is achieved, resulting in a dense microstructure and better mechanical properties. The solid electrolyte Li 6.4 Al 0.1 La 3 Zr 1.7 Ta 0.3 O 12 under two-step sintering (LLZATO-2) is successfully synthesized, delivering an ionic conductivity up to 7.33 × 10 −4 S cm −1 at room temperature and an activation energy of 0.22 eV. This work also highlights the critical role of co-doping combined with two-step sintering in preparing well-performing solid-state electrolytes and all-solid-state lithium-ion batteries.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Haoyu Wang,Ping Han,Ying Yu,Shaolong Han,Yue Qiao,Yuehan Li,Bin Sun,Zheng Gu
Conductive hydrogels have been extensively investigated and demonstrate promising applications in wearable and flexible sensors. However, their broader implementation in this field is hindered by the insufficient strain sensitivity, susceptibility to mechanical damage with limited self-recovery, and inadequate adhesion to human skin. Herein, we present a multifunctional MXene/TA@CNC electronic hydrogel patch (MTC e-patch) by integrating highly conductive two-dimensional (2D) transition metal carbides (MXene) and tannic acid-coated carboxylated cellulose nanocrystals (TA@CNC) with polyvinyl alcohol and borax. And dynamic three-dimensional (3D) network is formed through synergistic dynamic hydrogen bonding and dynamic borate ester linkages. The incorporation of TA@CNC effectively prevents the oxidation of MXene, thereby extending the operational lifespan of hydrogels. The flexible covalent crosslinked network, combined with the rigidity of TA@CNC, imparts the MTC e-patch with excellent electrical conductivity (1.62 S/m), superior mechanical strength (≈1.35 MPa, 930 %), robust adhesiveness (≈28 kPa), and high self-healing capability (92 %). The rapid (161 ms) and sensitive (Gauge factor = 4.39) sensing performance of the developed wearable sensor enables the precise detection of subtle human motions, such as swallowing, throat vibrations during speech, and pen strokes during writing. Even when damaged, the sensor continues to provide stable signal output, demonstrating significant potential for applications in smart wearables, electronic skins, and human–machine interfaces.
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Advanced Science
·
2022
·Vol. 9
·期 31
·2203890
·
IF 17.521
Xin Peng,Yuan Li,Tianjie Li,Yucong Li,Yingrui Deng,Xian Xie,Yi Wang,Gang Li,Liming Bian
Achieving robust underwater adhesion by bioadhesives remains a challenge due to interfacial water. Herein a coacervate-to-hydrogel strategy to enhance interfacial water repulsion and bulk adhesion of bioadhesives is reported. The polyethyleneimine/thioctic acid (PEI/TA) coacervate is deposited onto underwater substrates, which can effectively repel interfacial water and completely spread into substrate surface irregularities due to its liquid and water-immiscible nature. The physical interactions between coacervate and substrate can further enhance interfacial adhesion. Furthermore, driven by the spontaneous hydrophobic aggregation of TA molecules and strong electrostatic interaction between PEI and TA, the coacervate can turn into a hydrogel in situ within minutes without additional stimuli to develop enhanced matrix cohesion and robust bulk adhesion on diverse underwater substrates. Molecular dynamics simulations further reveal atomistic details of the formation and wet adhesion of the PEI/TA coacervate via multimode physical interactions. Lastly, it is demonstrated that the PEI/TA coacervate-derived hydrogel can effectively repel blood and therefore efficiently deliver the carried growth factors at wound sites, thereby enhancing wound healing in an animal model. The advantages of the PEI/TA coacervate-derived hydrogel including body fluid-immiscibility, strong underwater adhesion, adaptability to fit irregular target sites, and excellent biocompatibility make it a promising bioadhesive for diverse biomedical applications.
研究领域:
材料科学
·
生物材料
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生物医学工程
·
组织工程
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PubMed
高影响因子
Frontiers of Physics
·
2022
·Vol. 18
·期 1
·1-10
·
IF 5.142
Xu Meng,Guo Lei,Chen Lei,Zhang Ying,Li Shuang-Shuang,Zhao Weiyao,Wang Xiaolin,Dong Shuai,Zheng Ren-Kui
Weak antilocalization (WAL) effect is commonly observed in low-dimensional systems, three-dimensional (3D) topological insulators and semimetals. Here, we report the growth of high-quality Ta 0.7 Nb 0.3 Sb 2 single crystals via the chemical vapor transport (CVT). Clear sign of the WAL effect is observed below 50 K, probably due to the strong spin—orbital coupling in 3D bulk. In addition, it is worth noting that a relatively large MR of 120% appears under 1 T magnetic field at T = 2 K. Hall measurements and two-band model fitting results reveal high carrier mobility (>1000 cm 2 · V −1 ·s− 1 in 2–300 K region), and off-compensation electron/hole ratio of ∼8:1. Due to the angular dependence of the WAL effect and the fermiology of the Ta 0.7 Nb 0.3 Sb 2 crystals, interesting magnetic-field-induced changes of the symmetry of the anisotropic magnetoresistance (MR) from two-fold (≤ 0.6 T) to four-fold (0.8–1.5 T) and finally to two-fold (≥ 2 T) are observed. This phenomenon is attributed to the mechanism shift from the low-field WAL dominated MR to WAL and fermiology co-dominated MR and finally to high-field fermiology dominated MR. All these signs indicate that Ta 0.7 Nb 0.3 Sb 2 may be a topological semimetal candidate, and these magnetotransport properties may attract more theoretical and experimental exploration of the (Ta,Nb)Sb 2 family.
研究领域:
凝聚态物理
·
材料科学
·
量子输运
·
拓扑物态
·
半导体物理
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jiping Zhao,Youlong Xu,Yizhuo Li,Jingping Wang,Xiangdong Ding
For electrochemical etching, it is often assumed intuitively that the high specific surface area (SSA) is largely dependent on the aggressiveness of the corrosive agent. Today, however, we present a different perspective. In this study, we combine theoretical calculations and electrochemical experiments to fully understand the mechanisms of Cl - and Br - in the three stages of the tantalum (Ta) pitting process, including passivation film breakdown, Ta anodic dissolution and re-passivation. The results show that both Cl - and Br - cause the breakdown of the passivation film and the dissolution of Ta atoms, with the former having a more pronounced effect. However, MD simulations show that the re-passivation of Ta occurs only in Br - containing media but not in Cl - containing media. This means that Ta is protected by adsorption of dissolved oxygen while being destroyed by Br - , but is only dissolved in NaCl solution. The same result is observed in our electrochemical experiments. In addition, the specific capacity of etched Ta foil in NaBr solution is as high as 325μF/cm 2 while it is only 48μF/cm 2 in NaCl. It is precisely the protective rather than the destructive effect of the etchant that is more important for obtaining high SSA.
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高影响因子
Journal of Macromolecular Science Part B-Physics
·
2024
·
IF 1.2
Zeguang Yang,Zhi Gao,Hongwei He,Lan Jia,Fuyong Liu,Wenwen Yu,Yonggang Li
The polyethylene terephthalate (PET) fibers surfaces were modified by complexing tannic acid (TA)-iron ions (Fe3+) to form a metal skeleton structure on the fibers. In this system a large number of phenolic hydroxyl groups, epoxy groups and other active groups on the fibers surfaces can stabilize the metal skeleton structure and enhance the interfacial peeling performance between the fibers and the composite rubber matrix. The modified PET fibers were analyzed by scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and mechanical properties. The results showed that the peeling strength between the modified fibers and the rubber matrix was increased 45%. This method has the advantages of simple operation, mild conditions and low cost, which provides a new idea for the preparation of rubber/polyester fiber composites with excellent mechanical properties.
研究领域:
材料科学
·
高分子科学
·
表面改性
·
复合材料
·
化学工程
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Zhipeng Lin,Jialing Zhuang,Shunyu Chen,Xiufeng Xiao
The development of hydrogel dressings that integrate mechanical compliance, continuous monitoring capability, and on-demand therapeutic functions remains a critical challenge in advanced wound management. Herein, a multifunctional conductive organohydrogel (POTEL) composed of a dual-network polyacrylamide/oxidized sodium alginate (PAM/OSA) hydrogel integrated with tannic acid-functionalized MXene (TA@MXene) nanosheets and lithium chloride was synthesized in a water/ethylene glycol binary solvent system. The resulting POTEL organohydrogel exhibited superior mechanical properties (fracture strain > 1400 %), high electrical conductivity (2 S/m), significant antifreezing performance (stable to −70 °C), and prolonged moisture retention. It also demonstrated an outstanding photothermal antibacterial efficacy under NIR irradiation, achieving > 99 % inactivation against both S. aureus and E. coli. When employed as a strain sensor, the material showed a high sensitivity (gauge factor = 2.70 at 100 % strain) and robust cycling durability (>100 cycles). In a full-thickness skin defect model, the POTEL organohydrogel significantly accelerated wound closure and tissue regeneration through combined photothermal antibacterial action and electrical stimulation (ES), which collectively attenuated inflammatory responses and enhanced collagen deposition. This work provides a scalable strategy for designing multifunctional hydrogels capable of simultaneous monitoring and wound healing, demonstrating a great potential as next-generation smart wound dressings and skin-conformal electronic sensors.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yanru Yuan,Yingfan Li,Xu Peng,Dong Zhang,Ziyi Xu,Peiyi Gao,Jinghe Guo,Bohan Ding,Yanxiang Wang
With the rapid development of flexible electronics and wireless communication technologies, lightweight and flexible electromagnetic interference (EMI) shielding materials are in high demand. However, conventional homogeneous MXene/polymer composites often exhibit excessive surface reflection and insufficient internal electromagnetic attenuation. In this work, a tannic acid-modified MXene (TA@MXene)/waterborne polyurethane (WPU) composite film with a thickness-direction asymmetric structure was fabricated through a solution-casting process combining gravity-driven sedimentation and solvent evaporation. TA modification improved the dispersion stability of MXene nanosheets and facilitated the formation of an asymmetric conductive structure within the WPU matrix. The resulting composite film exhibited anisotropic electrical conductivity and effective EMI shielding performance in the X-band. At a TA@MXene loading of 12.5 wt%, the film achieved an EMI shielding effectiveness of 34.3 dB and an SSE/t value of 4975 dB cm 2 g −1 . In addition, the composite film maintained good mechanical flexibility, tensile strength, and improved flame-retardant performance. This work demonstrates an effective strategy for constructing multifunctional MXene-based flexible shielding materials through spatial regulation of conductive networks.
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高影响因子
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