ENERGY
·
2021
·
IF 7.147
Yifeng Zheng,Shun Wang,Zehua Pan,Bo Yin
Electrochemical CO 2 reduction to CO by using solid-oxide electrolysis cells (SOECs) is a promising option to produce useable fuels using renewable energy. However, traditional cobalt-based air electrodes exhibit high thermal-expansion coefficients and a tendency of Co segregation, compromising long-term stability. Here, Co-free Bi 0.5 Sr 0.5 FeO 3-δ perovskite was explored with Ta doping into the B-site as the air electrode (BSFTx). Doping Ta enabled a decrease in polarization resistance by 45% from 0.31 Ω cm 2 to 0.17 Ω cm 2 at 700 °C. The distribution function of relaxation times analysis suggested that the observed improvements can be ascribed to the enhanced mass-transfer processes, which include oxygen diffusion, association, and desorption. The performance of a cathode-supported Ni-YSZ (ytttria-stabilized zirconia)|YSZ|Gd-doped ceria|BSFTx cell was characterized by an electrolysis current of −0.81 A cm −2 under 1.5 V at 800 °C, which corresponds to a CO-production rate of 4.2 × 10 3 nmol s −1 cm −2 and an electrical efficiency of 98%. Excellent stability of the cell was also demonstrated by steady current density during the 32-h test executed under 1.2 V at 800 °C. The nearly 100% electrical efficiency and the satisfactory performance and stability of SOEC with Ta-doped BSF air electrode indicated its potential use in CO 2 reduction technique.
研究领域:
材料科学
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能源化学
·
电化学工程
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Zhiwei Li,Zhengxiang Bian,Yurong Ren,Zhihui Chen,Jiujun Xu
(1-x)(0.9Ba 1.003 Ti 0.97 Ca 0.03 O 3 –0.1(Bi 0.51 Na 0.47 ) 0.94 Ba 0.06 TiO 3 )-xNa(Nb 0.85 Ta 0.15 )O 3 ( x = 0.03–0.15) ceramics were designed and fabricated through a bidirectional optimization strategy using traditional solid reaction method. The results revealed that the introduction of Na(Nb 0.85 Ta 0.15 )O 3 increased the vacancy concentration at the A site , conducing to improved polarization and reduced grain size. The substitution at the B site disrupted the long-range ordered ferroelectric domains and generated polar nanodomains, leading to enhanced relaxation behavior. The optimum energy storage density of 3.57 J/cm 3 and efficiency of 87.5% were simultaneously achieved under the electric field of 220 kV/cm in the sample with x = 0.09. Moreover, it also exhibits extremely high-power density (∼57 MW/cm 3 ), ultrafast discharge time (∼103 ns), high discharge density (1.35 J/cm 3 ), along with excellent temperature (30‒120 °C) and frequency stability (1‒100 Hz) under the equivalent electric field of 120 kV/cm. This novel design strategy provides theoretical guidance for the development of advanced electrical energy storage devices.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2026
·
IF 7.9
Chen Wang,Yue Li,Wenlin Yuan,Jingting Yang
The incorporation of functional fillers into epoxy coatings is an effective approach to impart specific properties; however, the random distribution of fillers within polymer matrices often limits their utilization efficiency. Herein, a magnetic core–shell nanocontainer (TA@Fe 3 O 4 ) was rationally designed and fabricated by encapsulating Fe–tannic acid (Fe–TA) complexes within hollow mesoporous Fe 3 O 4 nanospheres. In this architecture, Fe 3 O 4 serves dually as a magnetically responsive core for field-directed enrichment and as an intrinsic carrier for tannic acid (TA), thereby eliminating the need for additional carrier engineering. The surface Fe–TA complexes undergo pH-responsive coordination transformation under acidic conditions, enabling the controlled release of TA molecules. The released TA subsequently chelates with the metal substrate to form a compact passivation layer, providing active corrosion inhibition. Magnetic-field guidance significantly shortens the diffusion path of TA, thereby enhancing its delivery efficiency to corrosion-prone regions. Electrochemical impedance spectroscopy revealed a substantial improvement in corrosion resistance: the |Z| 0.01Hz value of the magnetically modulated coating (M-TF/EP) reached 1.41 × 10 10 Ω·cm 2 , approximately one order of magnitude higher than that of non-modulated coating (TF/EP). This work presents a straightforward yet highly effective strategy that integrates magnetic targeting and pH- triggered inhibitor release within a single nanostructure by directly coating the inhibitor onto a magnetic carrier, thereby enabling active and intelligent corrosion protection without complex synthesis procedures.
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Bayu Admasu Beshiwork,Xinyu Wan,Min Xu,Haoran Guo,Birkneh Sirak Teketel,Yu Chen,Jun Song Chen,Tingshuai Li,Enrico Traversa
The sluggish kinetics of the electrochemical oxygen reduction reaction (ORR) in intermediate-temperature solid oxide fuel cells (IT-SOFCs) greatly limits the overall cell performance. In this study, an efficient and durable cathode material for IT-SOFCs is designed based on density functional theory (DFT) calculations by co-doping with Nb and Ta the B-site of the SrFeO 3− δ perovskite oxide. The DFT calculations suggest that Nb/Ta co-doping can regulate the energy band of the parent SrFeO 3− δ and help electron transfer. In symmetrical cells, such cathode with a SrFe 0.8 Nb 0.1 Ta 0.1 O 3− δ (SFNT) detailed formula achieves a low cathode polarization resistance of 0.147 Ω cm 2 at 650 °C. Electron spin resonance (ESR) and X-ray photoelectron spectroscopy (XPS) analysis confirm that the co-doping of Nb/Ta in SrFeO 3− δ B-site increases the balanced concentration of oxygen vacancies, enhancing the electrochemical performance when compared to 20 mol% Nb single-doped perovskite oxide. The cathode button cell with Ni-SDC|SDC|SFNT configuration achieves an outstanding peak power density of 1.3 W cm −2 at 650 °C. Moreover, the button cell shows durability for 110 h under 0.65 V at 600 °C using wet H 2 as fuel.
研究领域:
材料科学
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电化学
·
能源工程
·
无机非金属材料
·
催化化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yan Zhao,Linfeng Hu,Shuo Liu,Yuzheng Liu,Weihong Guo
Metal-ion coordination jointly regulates hydrogel and TA@rGO networks. • PTGS-Fe 3+ reaches 1.10 MPa tensile and 3.33 MPa compressive strength. • Conductivity increases to 17.8 S m −1 despite stronger crosslinking. • Machine learning recognizes hydrogel states and nine human motions. The development of flexible sensors requires hydrogel materials with high mechanical strength, electrical conductivity, and multifunctional adaptability. However, achieving simultaneous enhancement of mechanical and electrical properties remains challenging due to the trade-off between network reinforcement and charge transport. Herein, a modular conductive hydrogel strategy based on metal-ion coordination regulation is proposed. A tannic acid-reduced graphene oxide (TA@rGO) conductive filler is incorporated into a polyacrylamide/sodium alginate (PAM/SA) double-network hydrogel, and the resulting PAM/TA@rGO/SA hydrogel is denoted as PTGS. Subsequently, dynamic coordination interactions between Cu 2+ /Fe 3+ ions and oxygen-containing groups of SA, as well as polyphenolic sites of TA, are utilized to prepare PTGS-Cu 2+ and PTGS-Fe 3+ hydrogels with tunable properties. Metal-ion coordination significantly improves the mechanical performance, with PTGS-Fe 3+ achieving tensile and compressive strengths of 1100 kPa and 3330 kPa, respectively. Unlike conventional ion-conducting hydrogels, where enhanced crosslinking generally suppresses conductivity, TA@rGO-mediated electronic pathways allow metal-ion coordination to simultaneously improve conductivity, reaching 17.8 S m −1 for PTGS-Fe 3+ . Moreover, different coordination states endow the hydrogels with distinct sensing characteristics, including wide-range strain detection, balanced sensitivity and detection range, and high sensitivity at low strain. Combined with machine learning algorithms, the hydrogels enable material-state recognition and accurate classification of diverse human motions. This work provides a modular strategy for designing multifunctional conductive hydrogels with tunable sensing capabilities.
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122376
·
IF 7.5
Ying Xue,Qing Liu,Yang Yv,Xiaonan Hao,Yue Wu,Shulin Sun
Wastewater treatment remains a critical global environmental challenge. In this study, zeolitic imidazolate framework-8 (ZIF-8) was first grown in situ on carboxylated carbon nanotubes (CNT-COOH), followed by coating with tannic acid (TA). The CNT-COOH@ZIF-8@TA composite was successfully synthesized. Subsequently, a series of polyvinylidene fluoride (PVDF)/CNT-COOH@ZIF-8@TA (PZC) separation membranes were fabricated by the non-solvent-induced phase separation (NIPS) method. Separation tests demonstrated the high removal efficiencies (>99%) of PZC membranes for methylene blue (MeB) and auramine O (AO) dyes, along with effective retention of corn oil and pump oil emulsions. Furthermore, the engineered PZC membranes exhibited significant adsorption capacity for aqueous dyes, achieving removal rates exceeding 98% for both MeB and AO. The adsorption characteristics and underlying mechanisms were elucidated through kinetic, isothermal, and intra-particle diffusion modeling. Additionally, the PZC membranes demonstrated catalytic activity towards MeB degradation, and the PZC4 membrane achieved a degradation efficiency of 88.3%. Moreover, to enhance membrane longevity, membrane regeneration was achieved through photocatalytic cleaning under UV irradiation, offering an alternative to conventional cleaning methods. This study systematically analyzed the chemical structure, surface morphology, hydrophilicity, and charge properties of the material through multiple characterization techniques, including Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), Scanning Electron Microscopy (SEM), contact angle measurement, and Zeta potential analysis. The membrane's wastewater purification capability was comprehensively evaluated by combining filtration performance, adsorption experiments, and photocatalytic testing. The designed separation membranes offer promising solutions for the post-treatment of oil spills and the remediation of dye-contaminated wastewater.
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DOI
高影响因子
FIBERS AND POLYMERS
·
2025
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IF 2.3
Zhang Shuo,Guo Mengyao,Wu Jiaqing,Wang Ying,Zhang Xin
A novel spinning method that integrates electrospun nanofiber strips into yarn structures has been developed to produce multifunctional yarns. The resulting yarn exhibited a core-sheath structure, with a core composed of tannic acid-modified magnesium hydroxide/thermoplastic polyurethane (TA@MH/TPU) nanofiber strip, sheathed by either pure cotton or cotton/sodium alginate blended fibers. The TA modification improved the dispersion of MH within the TPU matrix, leading to enhanced membrane strength compared to unmodified MH/TPU at equal loadings. The film containing 7% TA@MH/TPU demonstrated optimal mechanical properties (breaking strength of 1.43 MPa, elongation of 122.93%), flame retardancy (limiting oxygen index of 27.1%), and antibacterial efficacy killing ratios of 80.87% against E. coli and 85.07% against S. aureus . Yarns fabricated with this film, the TA@MH/TPU-cotton (CMSCY) retained the antibacterial functionality (67.48% against E. coli and 79.05% against S. aureus ), and the TA@MH/TPU-cotton/sodium alginate (C/SAMSCY) achieved the flame retardancy with a limiting oxygen index of 27.8%. Notably, the CMSCY yarn showed a high tensile strength of 1.53 MPa, which was 15 times that of the TA@MH/TPU nanofiber film, addressing the application limitations of nanofiber membranes caused by their low mechanical strength. Given that electrospun membranes can be readily functionalized, this spinning method offers a promising strategy for producing composite yarns, particularly for developing multifunctional textile fabrics.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Chao Zhang,Xiulin Han,Bin Zuo,Dewei Li,Changhua Li,Jing Zhang,Xiaoyu Mao,Wei Ren,Songlin He,Yi He,Shihong Zhang
The corrosion and wear of metals have long been persistent challenges for researchers and engineers. This work aims to develop a coating with long-term corrosion resistance, while addressing the poor wear resistance of epoxy coatings. 2D Siloxene (S) nanosheets were prepared using the topochemical method. Using S nanosheets as carriers, a core-shell structure with MoS₂ encapsulating S nanosheets was constructed via a hydrothermal method, endowing the coating with high barrier properties and wear resistance. To further strengthen the long-term corrosion resistance of the coating and improve the compatibility between the core-shell structure and EP resin, a layer of tannic acid was uniformly loaded onto the surface of the core-shell structure through a one-pot coprecipitation method. A systematic investigation was conducted on the corrosion and wear resistance of the coating. The results reveal that the composite coating, exhibiting outstanding corrosion resistance, also shows remarkable wear resistance. The |Z| 0.01 Hz of the composite coating increased from 8.4 × 10⁸ Ω•cm² to 9.62 × 10 9 Ω•cm 2 , with the wear rate dropping by 72.5 %. This investigation yields valuable guidance for the construction of coatings with long-term corrosion resistance, simultaneously providing a new perspective on the application of S nanosheets.
研究领域:
材料科学
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纳米技术
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表面工程
·
腐蚀科学
·
机械工程
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产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Junqi Zhao,Zicheng Chen,Aijian Cao,Jiahao Huang,Suiping Deng,Jingxian Zhang,Langhuan Huang,Shaozao Tan
Bacterial infections pose a significant threat to the healing of human skin wounds, as the reactive oxygen species (ROS) they produce can significantly delay the wound healing process, ultimately leading to the formation of chronic wounds and even endangering human life. Therefore, this study successfully constructed a dynamically reversible hydrogel network through dual crosslinking of Schiff base bonds and hydrogen bonds using oxidized hyaluronic acid (OHA), carboxymethyl chitosan (CMCS), and tannic acid (TA). By loading Cu@PDA, the OCTC2 hydrogel wound dressing was prepared, exhibiting synergistic antibacterial and antioxidant properties through TA/Cu 2+ release and NIR-II photothermal effects. We used FTIR, XRD, SEM, and TEM to thoroughly analyse the specific composition and morphology of the Cu@PDA and hydrogel. We measured the injectability, adhesion, NIR-II photothermal, and antibacterial properties of each group of hydrogels. The results showed that TA and Cu@PDA endowed the hydrogel with excellent antioxidant properties, enabling effective scavenging of various free radicals. Additionally, OCTC2, which possesses sustained-release TA/Cu 2+ capability, achieves antibacterial rates of over 94 % against S. aureus and E. coli . Under the combined effect of NIR-II photothermal therapy, it can achieve highly efficient bacterial killing (99.8 %), effectively promoting the healing of bacterial infection wounds. OCTC2 holds promise as a potential ideal hydrogel dressing for treating bacterial-infected wounds.
研究领域:
生物材料
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伤口修复
·
纳米医学
·
感染控制
·
自由基生物学
·
药用高分子
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 11
·1-12
·
IF 2.8
Yang Zaizhi,Wang Xi,Zhang Liang,Li Hailing,Zhang Hui,Xu Dong
Flash sintering is considered a promising energy-saving and efficient technology for preparing high-temperature ceramics. The effects of limited current on flash sintering parameters, microstructure, and electrical properties of (La 1/2 , Ta 1/2 ) 0.02 Ti 0.98 O 2 ceramic were investigated by the XRD, SEM, XPS, and precision impedance analyzer. With limiting current increase, the grain size of flash sintering sample increases gradually, and the relative density increases first and then decreases. The average grain size is about 1 μm, and the highest relative density is 96.9%. Joule heating runaway and oxygen vacancy defect lead to rapid densification of flash sintering La and Ta co-doped TiO 2 ceramics. According to the EPDD model, doped La 3+ and Ta 5+ ions increase the concentration of oxygen vacancies and free electrons, lead to local polarization of carriers, and obtain a giant dielectric constant of ε ’ = 7.6 × 10 4 and low dielectric loss of tanδ = 0.11. At high temperature, electrons break free from the constraints of defect clusters and accumulate at the interface, leading to interface polarization due to the IBLC model. The giant dielectric properties originate from the combined effect of EPDD and IBLC model.
研究领域:
材料科学
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陶瓷工程
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电气工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Anlin Xu,Zihao Song,Zhiyi Zhou,Pu Yang,Qiqi Zhang,Yunhai Zhang,Yongjun Zhang
Per- and polyfluoroalkyl substances (PFASs) have been widely found in water bodies and may generate negative impacts on the ecosystem. Eectrocoagulation (EC) with a zinc anode is an effective technology to remove PFASs but the dominating interaction forces between zinc flocs and PFASs are still not well elucidated. In this study, we used hexafluoropropylene oxide trimer acid (HFPO-TA), a new perfluorooctanoic acid substitute, as a model to investigate the influence of EC operational parameters on its removal efficiency, including the current density, the pH value, and the electrolyte type. 99 % removal of 40 μM HFPO-TA were achieved in 3-h at optimal conditions. The extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory was innovatively applied to reveal the interfacial free energies between zinc flocs and HFPO-TA and other PFASs. It was found that the hydrophobic force can significantly promote the adsorption of HFPO-TA on the surface of zinc flocs and a strong correlation may exist between the calculated total interfacial free energies and the pseudo-first-order kinetic constants of removing PFASs. FT-IR spectra indicated the specific interactions occurring between carboxylate head groups and zinc flocs. These findings advance the mechanistic understanding of PFASs removal by metal flocs and could support the development of electrocoagulation for removing PFASs.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xin Zhong,Yihang Zhang,Zhiguang Guo
Currently, surfactant-containing oil–water emulsions are the more difficult part of oily wastewater to treat because of their small droplet size and stable oil–water interface. Membrane separation technology is commonly used for emulsion separation due to its surface wettability and adjustable pore size. Here, tannic acid (TA) and 3-aminopropyltriethoxysilane prepolymerization solutions are used as the exchange solvents, allowing growth on the surface and inside of polyvinylidene difluoride (PVDF). Among them, the content of lithium chloride (LCM) hydrate modulates the range and amount of growth. In the pressure range of 0.1–0.7 bar, the modified hydrophilic PVDF-TA/LCM-2 membranes exhibit high pure water permeation fluxes and emulsion separation efficiencies that can be adapted to different separation conditions. At 0.2 bar, the PVDF-TA/LCM-2 achieves pure water permeate flux and emulsion separation fluxes of 1860 and 648 L m -2 h −1 bar −1 , and an emulsion separation efficiency of 99.5 %. In addition, for different kinds of oil-in-water emulsions, the high separation fluxes and high separation efficiencies indicate that PVDF-TA/LCM-2has good emulsion separation performance.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）