Materials Today Chemistry
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2025
·
IF 6.7
Ting Zhang,Ruyi Zhao,Bin Yang,Jiaojiao Sang,Zhengzhi Zheng,Tianyu Lu,Xinyu Li,Zihao Xu,Rui Hu,Zihao Lv,Ru Xia,Jiasheng Qian,Ning Jia
Addressing the demand for high-thermal-conductivity composites in flexible electronics thermal management, this study designed a bioinspired composite film based on bacterial cellulose (BC) nanofibers as the flexible matrix. The MXene@TA-Ag/BC (MTAB) composite film with a “brick-and-mortar” biomimetic structure was constructed through vacuum-assisted filtration and hot-pressing processes, incorporating tannic acid (TA)-modified MXene nanosheets with in situ loaded silver nanoparticles (AgNPs). The dihydroxy groups of TA not only facilitated the uniform deposition of AgNPs on MXene surfaces but also formed multiple hydrogen bonds with the BC matrix, significantly enhancing interfacial compatibility. When the mass fraction of the composite filler reached 40 %, the in-plane thermal conductivity of the as-prepared composite films significantly increased from 2.66 W/m·K (of pure BC films) to 10.99 W/m·K, representing an increase of 313.8 % in comparison to that of pure BC matrix. Mechanical characterization further revealed remarkable tensile strength (114.8 MPa), primarily attributed to synergistic stress-transfer between MXene@TA-Ag fillers and the BC matrix. Thermogravimetric analysis demonstrated superior thermal stability with a maximum decomposition temperature of 277.4 °C, indicating suitability for high-temperature applications.The present work achieved synergistic optimization of thermal and mechanical properties through a multi-scale interfacial engineering strategy, offering new insights for developing next-generation flexible thermal interface materials.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Ximing Duan,Jiale Zheng,Pengfei He,Shujun Hu,Chuan Sun,Zhenfeng Hu,Fengchun Jiang,Zenghua Liu,Xiubing Liang
Enhancing the ablation resistance of ultra-high temperature ceramics based on the solid-liquid theory has become a research hotspot in the field of thermal protection. In this study, HfC-TaC micron composite powders were prepared using spray granulation, and a solid-solution (Hf, Ta)C coating was deposited on the Ta10W substrate through the dual solid-solution effect of radio frequency inductively coupled plasma spheroidization and supersonic atmospheric plasma spraying. The phase composition, microstructure, ablation resistance, and underlying mechanisms of the coating were investigated. The results indicate that after ablation for 200 s at 2200 °C and 2300 °C, the high melting point solid-phase products, HfO 2 and Hf 6 Ta 2 O 17 , serve as structural skeletons, while the liquid-phase Ta 2 O 5 acts as a filler, collectively protecting the Ta10W substrate from oxidation and ablation.
研究领域:
材料科学
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陶瓷
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热防护系统
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等离子喷涂
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高温材料
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
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IF 3.779
Xiaolan Chen,Tian Wang,Wanzheng Lu,Tianxiang Cao,Mingzhe Xue,Bing Li,Cunman Zhang
A modified solution method was applied to synthesize cubic garnet solid-state electrolyte Li 7 La 3 Zr 2 O 12 (LLZO) and Li 6.45 Ca 0.05 La 2.95 Ta 0.6 Zr 1.4 O 12 (LCLTZO). The synergetic doping of Ca and Ta is found to induce the formation of cubic LCLZTO with high ionic conductivity of 4.03 × 10 −4 S cm −1 while LLZO without substitution exhibits tetragonal phase with low conductivity. A Li-S cell with sulfur cathode and as-prepared LCLTZO solid electrolyte “separator” was conducted to deliver large initial discharge capacity of 1090 mAh g −1 with high initial Coulombic efficiency up to 92%. Cell with LCLTZO also exhibited better cycling performance at 0.2 C and extremely high Coulombic efficiency (close to 100%) than the cell without solid electrolyte. Better rate performance was also achieved at lower rate (0.2 C, 0.5 C and 1 C) by cell with LCLTZO although it lost advantages at higher rate of 2 C and 5 C due to the limitation of ionic conductivity of LCLTZO. Energy dispersive X-ray spectroscopy (EDS) provided direct evidence that LCLTZO solid electrolyte greatly suppressed the shuttle effect generated by polysulfides . The electrochemical impedance spectroscopy was applied to discuss the difference between cells with and without LCLTZO during the discharge process. Charge transfer reaction referred to soluble polysulfides was found to be slower in cell with LCLTZO than that in cell without solid electrolyte.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yongwei Zhang,Sining Yun,Xinying Qiao,Menglong Sun,Jiaoe Dang,Changwei Dang,Jingjing Yang
Developing high-performance and low-cost catalysts for replacing Pt-based catalysts is a significant challenge for solar cells and water splitting applications. In this work, a bifunctional hybrid catalyst of MnTa 2 O 6 @MPC (MPC: mesh-like bio-based porous carbon) was synthesized, using a co-precipitation approach. Benefiting from the high specific surface area (332.743 m 2 g −1 ), integrating the merits of the electrical conductivity of MPC, the outstanding electrocatalytic ability of MnTa 2 O 6 , and the synergistic effect between MnTa 2 O 6 and MPC, the catalytic activity of MnTa 2 O 6 @MPC was significantly enhanced. To boost the photovoltaic performance of dye-sensitized solar cells, a novel Cu 2+ /Cu + redox mediator and dye (Y123, D35) were adopted for replacing the traditional I 3 - /I - redox mediator and N719 dye, respectively. The resulting advanced solar cell with the Cu 2+ /Cu + redox mediator based on the MnTa 2 O 6 @MPC counter electrode catalyst exhibited a photovoltage of ~0.88 V, and cell efficiencies of 3.41% and 1.92% for the D35 and Y123 dye systems, respectively, which are respectively 16% and 8% higher than that of Pt. MnTa 2 O 6 @MPC also exhibited significant catalytic ability for hydrogen production, yielding a small overpotential of 141.9 mV at a current density of 10 mA cm −2 and a small Tafel slope of 105.0 mV dec −1 in an alkaline medium. This work provides promising guidance for designing bifunctional hybrid electrocatalysts for high-performance new energy devices.
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高影响因子
MICROCHEMICAL JOURNAL
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2014
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IF 3.583
Shengling Sun,Jie Li
A method has been developed for the determination of zirconium (Zr), hafnium (Hf), niobium (Nb), tantalum (Ta), molybdenum (Mo), tungsten (W), and tin (Sn) in seawater by quadrupole inductively coupled plasma-mass spectrometry (Q-ICP-MS). The method is based on separation of the seven elements by extraction chromatography using N-benzoyl-N-phenylhydroxylamine (BPHA) supported on a microporous acrylic ester polymeric resin. The optimized procedure indicates that the BPHA resin has high selective adsorption for Zr, Nb, Mo, Sn, Hf, Ta, and W (known as fluoride soluble elements), whereas other interference and matrix elements are minimally adsorbed. The optimized eluent mixture with their molarity gives satisfactory recoveries for all analytes. The recovery can be achieved 99% for Zr, 97% for Nb, 97% for Mo, 99% for Sn, 99% for Hf, 95% for Ta, and 98% for W, respectively, by eluting with 6 mL of 6 mol L − 1 HF/1 mol L − 1 HCl. Furthermore, the technique for separation and enrichment of these elements provides a low total method blank. The detection limits for this method are 0.5 ppt for Zr, 0.2 ppt for Nb, 1.7 ppt for Mo, 1.0 ppt for Sn, 0.1 ppt for Hf, 0.1 ppt for Ta, and 0.3 ppt for W, respectively. The validity of the method is evaluated by replicate analyses of seawater reference materials; the precision of the results is better than 3% (RSD, n = 4), and the results are in good agreement with certified values. The established procedure has proved to be both practical and effective for seawater sample analyses.
研究领域:
分析化学
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海洋化学
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环境地球化学
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痕量元素检测
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质谱分析
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DOI
高影响因子
Energy Storage Materials
·
2025
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IF 20.2
Tan Wang,Zhe Bai,Xiaotian Gao,Yu Bai,Yaojie Lei,Zhenhua Wang,Guoxiu Wang,Kening Sun
Single-atom catalysts (SACs) have emerged as an effective approach to improve the utilization efficiency of sulfur cathodes in lithium–sulfur (Li–S) batteries, owing to their unique atomic-scale catalytic interfaces. However, achieving fast reaction kinetics for both the liquid–solid and solid–solid conversion of lithium polysulfides (LiPSs) demands a tandem catalysis mechanism with multiple active sites, which remains a major challenge. Herein, we report the first example of an asymmetric Ta–N 5 single-atom catalyst (denoted Ta SAs/NC) with dual active sites engineered to trigger tandem catalysis and thereby promote the stepwise conversion of LiPSs. The asymmetric Ta–N 5 coordination environment induces electron redistribution, thereby intensifying d–p orbital hybridization between the Ta 5d and S 3p orbitals. In this tandem catalytic process, the Ta–S bond predominantly accelerates the liquid–solid conversion of LiPSs, whereas the N5–Li (N5 represents the fifth N atom in Ta SAs/NC) bond serves as the principal active site for the subsequent solid–solid conversion. Li–S batteries with the Ta SAs/NC interlayer exhibit a high capacity retention of 90.42 % after 500 cycles at 7 C. In addition, the cells with a high sulfur loading of 5.03 mg cm −2 deliver an exceptional initial areal capacity of 5.72 mAh cm −2 and maintain 5.01 mAh cm −2 after 30 cycles. Moreover, the pouch cell based on this interlayer exhibits excellent capacity decay of 0.21 % per cycle after 200 cycles.
研究领域:
储能
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材料科学
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电化学
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催化
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纳米技术
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高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 46
·12566-12574
·
IF 5.976
Xiaohui Li,Lei Zhou,Miroslav D. Dramićanin,Qiang Tang,Xiping Jing,Jianxin Shi,Yiqin Xu,Mingmei Wu
Broad emission with a full and continuous color spectrum realized by crystal engineering is extensively desired to simulate natural sunlight and improve the white color quality. Herein, new insight into the modulation of B site order–disorder and intrinsic oxygen defects for complex perovskite (A3B′B2′′O9) Sr3−xScxZnNb2O9 (0 ≤ x ≤ 0.1) phosphors is demonstrated for broad-band emission via crystal engineering. We elucidate that the spectrum of Sr3ZnNb2O9 synthesized at an optimal temperature exhibits two emission bands under near-ultraviolet excitation (λex = 374 nm) which is readily available from near ultraviolet chips. The two broad emission bands can be ascribed to charge transfer from the empty 4d (t2g)-orbitals of Nb5+ ions to the filled 2p-orbitals of O2− ions and the intrinsic oxygen defects. Further, as a proposed strategy to optimize the luminescence property of Sr3ZnNb2O9 (SZN), we realized A-site nonequivalent doping to induce B-site disordering and cancel the luminescence quenching which results from B site ordering. The A-site nonequivalent doping efficiently offsets intrinsic oxygen defects, as validated by systematic analyses of experiments and DFT calculations. Consequently, the novel phosphor Sr3−xScxZnNb2O9 (x = 0.1) shows a high color rendering index (Ra = 82.2) and negligible color shift. In addition, its emission intensity is enhanced by ∼70 times as compared to the pristine Sr3ZnNb2O9.
研究领域:
材料科学
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发光材料
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固态化学
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荧光粉
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光学材料
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高影响因子
CERAMICS INTERNATIONAL
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2021
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IF 4.527
Yuhui Chen,Ruolin Zhang,Shen Hu,Pengyang Jiang,Jun Song,Xiani Huang
In this study, the corrosion resistance and thermal shock resistance of Sc x Ta 0.5−x YSZ (x = 0, 0.05, 0.25, 0.45, and 0.5 mol%) coatings prepared via the solid-state reaction method were compared and evaluated. The corrosion resistance and thermal shock resistance of different materials were analyzed using X-ray diffraction, field-emission scanning electron microscopy, energy-dispersive spectrometry, and stereomicroscopy. Results show that Sc 0.25 Ta 0.25 YSZ has the best corrosion resistance and thermal shock resistance among all tested materials and the number of thermal cycles exceeds 679 at 1150 °C. The excellent properties can be attributed to the small ionic radius of Sc 3+ in the Sc 0.25 Ta 0.25 YSZ composite, which gives the material good thermal stability at high temperatures. In the corrosion process, Sc 0.25 Ta 0.25 YSZ forms highly stable zirconia tantalum , affording good corrosion resistance.
研究领域:
材料科学
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陶瓷
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高温材料
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Lihao Xu,Yang He,Xia Feng,Fengying Dai,Ning Yang,Yiping Zhao,Li Chen
In the separation of oil/water emulsions using membrane separation methods, fouling remains a problem. To improve the fouling resistance effectively, a hydrophilic tannic acid (TA) coating was constructed on the poly(vinylidene fluoride) (PVDF) membrane via dip-coating method. Both the wettability and surface free energy were dramatically enhanced after the introduction of the TA coating. TA deposition with extended dip-coating time did not result in a corresponding increase in the pure water permeate quality, suggesting that there is a trade-off between the enhanced surface hydrophilicity and diminished pore size. Furthermore, the threshold fluxes were determined using the flux-stepping method, and explored to provide guidance on membrane fouling rates for oil/water emulsion filtration. The hydrophilic TA dip-coated PVDF membrane prepared at a dip-coating time of 9 h exhibited the highest threshold flux compared to the other membranes. The experimental evidences of the threshold fluxes can be used to predict the sustainable flux regimes for the TA dip-coated membranes. Constant flux verifiable experiments for oil/water emulsion were performed at fluxes near and below the threshold fluxes. By selecting a constant flux strategy below the threshold flux, membrane over-fouling can be avoided efficiently and the operating period can be prolonged favourably. More generally, operation below the threshold flux recognizes a modest fouling level, arising from the sufficient flux, which would result in the infrequent need for cleaning and is a compromise between capital expenditure and operating costs.
研究领域:
环境工程
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Kim-Sinh Nguyen-Thi,Hasan Fareed,Anh-Dao Le-Thi,Yunho Lee,Seoktae Kang,In S. Kim
The high efficiency and adaptability of reverse osmosis (RO) are two main reasons this separation technology is accepted worldwide, depending on its various uses, such as water purification, desalination, and concentration. The potential of RO can be enhanced by utilizing the hollow fiber (HF) mode, benefiting from higher packing density, ease of cleaning, and cost competitiveness. However, its suitability for RO applications becomes questionable due to its weaker and fragile mechanical resilience. To solve the abovementioned issue and improve the mechanical strength and burst/crush pressure, we propose optimizing the selective layer of the TFC-RO membrane using tannic acid complexation with FeCl 3 . The polyethersulfone (PES) support layer was initially fabricated to host the polyamide (PA) layer. Subsequently, the introduction of tannic acid-ferric chloride complexation was implemented as a sandwich layer between the aqueous and organic phase reactions to host a coherent and selective PA layer to further enhance its performance by controlling the kinetics of interfacial polymerization (IP). The surface morphology, physicochemical properties, and underlying reactions were analyzed using scanning electron microscopy (SEM), atomic force microscope (AFM), Fourier infrared spectroscopy (FTIR), x-ray photoelectron spectroscopy (XPS), and water contact angle measurements. The TFC-RO membrane M_TA0.2/Fe7.5 (7.5 mM FeCl 3 & 0.2 wt% tannic acid) showed significant improvement in pure water permeance and salt rejection along with 7.23 MPa of burst pressure and 68.41 % strain, which proves superior elasticity and mechanical robustness because of PA TA/Fe 3+ complexes formed during the IP. Moreover, the proposed facile tannic acid modification is effective and scalable. It significantly improves the mechanical efficacy of the HF TFC-RO membrane, solving a great problem for its commercial adaptability for RO applications and paving the way for smoother industrial translation for direct human factor applications.
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高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Shuang Mu,Weilin Huang,Wuhui Sun,Ning Zhao,Mengyang Jia,Zhijie Bi,Xiangxin Guo
The solid polymer electrolyte (SPE) is one of the most promising candidates for building solid lithium batteries with high energy density and safety due to its advantages of flexibility and light-weight. However, the conventional monolayered electrolytes usually exhibit unstable contacts with either high-voltage cathodes or Li-metal anodes during cell operation. Herein, heterogeneous dual-layered electrolyte membranes (HDEMs) consisting of the specific functional polymer matrixes united with the designed solid ceramic fillers are constructed to address the crucial issues of interfacial instability. The electrolyte layers composed of the high-conductivity and oxidation-resistance polyacrylonitrile (PAN) combined with Li 0.33 La 0.557 TiO 3 nanofibers are in contact with the high-voltage cathodes, achieving the compatible interface between the cathodes and the electrolytes. Meanwhile, the electrolyte layers composed of the high-stability and dendrite-resistance polyethylene oxide (PEO) with Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 nanoparticles are in contact with the Li-metal anodes, aiming to suppress the dendrite growth, as well as avoid the passivation between the PAN and the Li-metal. Consequently, the solid LiNi 0.6 Co 0.2 Mn 0.2 O 2 ||Li full cells based on the designed HDEMs show the good rate and cycling performance, i.e. the discharge capacity of 170.1 mAh g −1 with a capacity retention of 78.2% after 100 cycles at 0.1C and 30 °C. The results provide an effective strategy to construct the heterogeneous electrolyte membranes with double-side stable electrode/electrolyte interfaces for the high-voltage and dendrite-free solid lithium batteries.
研究领域:
材料科学
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电化学
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能量存储
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DOI
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
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2022
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IF 4.514
Qianrui Xu,Pengcheng Gao,Yang Wang,Wenjie Jiang,Zhifei Wang,Yong Jiang,Zhen Jiao
Porous nanospheres have potential applications in reactions, catalysis and water treatment because of their high surface area, low density and high loading capacity. In this work, a reproducible and well-controlled way to fabricate hollow Polystyrene/Poly(divinylbenzene-co-methacrylic acid)@Fe 3 O 4 /Tannic acid@Ag (PS/P(DVB-co-MAA)@Fe 3 O 4 /TA@Ag) nanocomposites with high catalytic efficiency is developed. Firstly, hollow Polystyrene/Poly(divinylbenzene-co-methacrylic acid) (PS/P(DVB-co-MAA)) nanospheres with an open hole on the surface are produced by supercritical carbon dioxide (scCO 2 ) rapid depressurization methodology. The consequence shows that structure of polymer nanospheres is controllable by altering the reactive conditions, like temperature, pressure, solvent ratio, degree of cross-linking and time. Secondly, the magnetic Fe 3 O 4 and Ag nanoparticles are deposited onto the surface of hollow PS/P(DVB-co-MAA) nanospheres. The result indicates that hollow PS/P(DVB-co-MAA)@Fe 3 O 4 /TA@Ag nanocomposites are highly efficient in degrading dyes, displaying that the apparent rate coefficients of methylene blue (MB), rhodamine B (RhB) and 4-nitrophenol (4-NP) reduction are .0090 s −1 , 0.0239 s −1 , and 0.0073 s −1 , respectively. Besides, hollow PS/P(DVB-co-MAA)@Fe 3 O 4 /TA@Ag nanocomposites can be recycled at least seven times and show no significant loss in catalytic performance.
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