Science Advances
·
2022
·Vol. 8
·期 50
·
IF 14.957
Qingxun Guo,Liang Wang,Longbo Yang,Jiashun Duan,Hainan Du,Guoqi Ji,Nian Liu,Xue Zhao,Chao Chen,Ling Xu,Liang Gao,Jiajun Luo,Jiang Tang
Next-generation wide color gamut displays require the development of efficient and toxic-free light-emitting materials meeting the crucial Rec. 2020 standard. With the rapid progress of green and red perovskite light-emitting diodes (PeLEDs), blue PeLEDs remain a central challenge because of the undesirable color coordinates and poor spectra stability. Here, we report Cs 3 CeBr x I 6− x ( x = 0 to 6) with the cryolite-like structure and stable and tunable color coordinates from (0.17, 0.02) to (0.15, 0.04). Further encouraged by the short exciton lifetime (26.1 ns) and high photoluminescence quantum yield (~76%), we construct Cs 3 CeBr x I 6− x -based rare-earth LEDs via thermal evaporation. A seed layer strategy is conducted to improve the device’s performance. The optimal Cs 3 CeI 6 device achieves a maximum external quantum efficiency of 3.5% and a luminance of 470 cd m −2 with stable deep-blue color coordinates of (0.15, 0.04). Our work opens another avenue to achieving efficient and spectrally stable deep-blue LEDs.
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DOI
高影响因子
RARE METALS
·
2024
·Vol. 44
·期 3
·1577-1593
·
IF 9.6
Sun Gao-Xing,Zhu Bin,He Rui,Liang Qi-Dong,Jiang Sheng-Yu,Ren Yan,Pan Xiao-Xiao,Sun Yu-Qing,Lu Mi,Zhang Wen-Xian,Huang Cheng-Huan,Zhuang Shu-Xin
Although lithium-ion batteries are widely recognized as a new generation of energy storage devices, their large-scale application is severely hampered by their low energy density and restricted cyclic stability. Herein, an ingenious dual-modified interface, where the F-doping and fluorocarbon coating co-existed on Li[Ni 0.8 Co 0.1 Mn 0.1 ]O 2 surface, is rationally constructed to elevate its energy density and structural stability attributed to F − grafting between the bulk material and the coating utilizing a robust super-conformal fluorocarbon coating structural framework and more stable F-doped system under high charge/discharge cut-off voltage. In comparison with a single carbon-coated modified Li[Ni 0.8 Co 0.1 Mn 0.1 ]O 2 , the dual-modified sample overcomes the fatal disadvantage of carbon coating stripping during long-period cycles ascribed to the “TM-F-multifunctional coating” connector which firmly combines the bulk material with the coating with a strong interaction force, exhibiting a more stable-reversible structure and excellent comprehensive electrochemical performance under high cut-off voltage. Concomitantly, the F-transition metal bonds with stronger bond energies improve its structural reversibility during the processes of charge/discharge under high voltage. Furthermore, the fluorocarbon coating enhances its charge transfer ability and effectively restrains the interfacial side reactions. Additionally, the climbing nudged elastic band methodology is used to calculate the diffusion energy barrier of lithium-ions in the matrix material, which confirms the fundamental reason for its superior lithium-ion diffusion ability. The high pseudocapacitance contribution ratio is perfectly explained by calculating the adsorption capacity on the surface of the dual-modified sample. Consequently, experiments and theoretical calculations unequivocally confirm its distinguished electrochemical properties under high cut-off voltage. Graphical
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CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Lingzhi Guo,Hongyan He,Yurong Ren,Chao Wang,Mingqi Li
Core-shell F-doped carbon coated SiO composites with interspaces and some small voids (SiO@F-doped C) are successfully fabricated using bulk SiO as starting material. With the assistance of polytetrafluoroethylene (PTFE), both etching and carbon coating of SiO are firstly performed in a single step, which largely lowers the production cost of materials. The SiO@F-doped C composite obtained by annealing the mixture of SiO and PTFE with a mass ratio of 5:3 at 650 °C shows the highest stable discharge capacity with excellent cycling stability. It delivers a stable discharge capacity of about 975 mAh g −1 at a current density of 100 mA g −1 . Even after the current density increases to 1600 mA g −1 , a stable discharge capacity of about 553 mAh g −1 can be achieved. At a current density of 400 mA g −1 , the composite maintains a discharge capacity of 752 mAh g −1 after 350 cycles, the retention of which is 99.2% versus that in the second cycle. Compared with the annealed SiO, in addition to higher conductivity, the ions diffusion rate of the SiO@F-doped C composite increases 2.94 times while the volume expansion falls by more than half, which should be responsible for its significantly enhanced electrochemical performance.
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JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 3.6
Yuheng Zhang,Xin Wang,Nan Chen,Xuezhong Gong,Yao Wang,Olga Grigoryeva,Jun Li,Ihor Rusetskyi,Mykhailo Danilov,Alexander Fainleib,Petro Stryzhak,Jianguo Tang
Cyanate ester resin (CER) is an excellent thermosetting polymer. However, its brittleness and poor mechanical properties limit its application. The innovation of this work lies in the smart collaborative toughening effects of Eu 3+ /Tb 3+ @uCNTs working together with phenolphthalein polyether sulfone (marked as PES-C) on dicyanate ester of bisphenol F. Tb 3+ -complex enhances Eu 3+ @uCNT-effects, and the cooperation of PES-C together with Eu 3+ -Tb 3+ @uCNTs (marked as ET-uC) functions strongly to increase flexural, tensile, and impact strengths by 209%, 120%, and 286%, respectively. When additions of ET-uC ratio at 0.6 wt% and PES-C ratio at 15% to CER. At the same time, we can get more multiple enhancing effects can be observed as below. The introduction of ET-uC reduces the curing temperature of the composite material from 342°C to 271°C. At the same time, the mass loss rate decreased from 87% to 55%. The intensity of luminescent CER/ET-uC/PES-C is much stronger compared to CER/ET-C/PES-C. If the curing temperature is 250°C, the luminescence lifetimes of CER/ET-C/PES-C and CER/ET-uC/PES-C become 411.23 and 731.91 μs, respectively. These strong data confirm that our strategy of ET-uC collaborating with the linear thermal stable polymer of PES-C functions has generated the breakthrough to improve the comprehensive properties of CER. Graphical Schematic diagram of preparation of CER/ET-uC/PES-C composite material.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 7
·1-15
·
IF 2.8
Shen Tao,Chen Hongxia,Fu Hu,Zhang Xinyu,Zhou Mengcheng,Xu Shuangwu,Hu Hanchi,Li Haichen,Zhou Hongming
P2-type layered transition metal oxides with high theoretical specific capacity and operating voltage are considered as one of the highly promising cathode materials for sodium-ion batteries, but the poor cycling stability attributed to the P2-O2 phase transition and Na + /vacancy ordering limits their practical applications. In this paper, a hydrothermal method is used to investigate the improvement of the electrochemical properties of Na 0.75 Ni 0.33 Mn 0.67 O 2 by Zn/F synergistic doping. The synergistic modification of Zn/F not only adjusts the valence distribution of Mn and improves the specific capacity, but also suppresses the phase transition under high voltage and the dissolution of transition metal ions. In particular, Na 0.75 Ni 0.23 Mn 0.67 Zn 0.1 O 1.95 F 0.05 (ZF-5) has excellent cycling performance (82.1% capacity retention after 100 cycles at 1C), compared to just 11.6% for the Na 0.75 Ni 0.33 Mn 0.67 O 2 (ZF-0). Above that, the rate performance is also significantly improved, with the specific capacity reaching 94.7 mAh g −1 even at a high current density of 5 C. Therefore, the Zn/F double doping modification strategy provides a simple and effective method for designing high-performance layered oxide cathode materials.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ying Qi,Huaming Yang,Chunli Li,Hao Li
During the storage/transportation of fruits and vegetables, ethylene-induced over-maturation and spoilage is a serious problem. Currently developed ethylene adsorbents exhibit great potentials due to their low cost and high efficiency, but always lack of water resistance. Herein, we developed Ag/F-Z5(X) adsorbents via the modification of ZSM-5 with different amounts of NH 4 F followed by silver loading, which exhibits enhanced ethylene adsorption and water resistance. Among the samples, Ag/F-Z5(25) featured with the largest capacity (6.44 mg·g −1 ) and the best water resistance, achieving near-complete removal of trace ethylene (100 ppm) at room temperature. Based on the characterizations, NH 4 F modification induced a hierarchical structure within the ZSM-5 framework, concurrently enhancing surface acidity, increasing the proportion of Ag + , and improving the dispersion of metals in the adsorbents. These enhancements collectively contribute to enhanced adsorption and water resistance. Further, banana storage experiments confirmed the actual preservation ability of Ag/F-Z5(25) thanks to the better adsorption and water resistance than unmodified Ag/Z5. These findings offer meaningful insights for developing high-efficient and water-resistant adsorbents to remove trace ethylene, consequently mitigating food aste and enlarging the commercial value of agricultural products.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Chuanjin Lin,Guoquan Suo,Jiarong Li,Rongrong Mu,Laraib Habib,Xiaojiang Hou,Shukai Ding,Jianfeng Zhu
Water-induced deterioration poses a significant threat to sandstone cultural heritage, necessitating effective protective measures. This research investigates a fluorine dual-modified nanocomposite coating composed of nanoplate-like TiO 2 and nanoparticle SiO 2 , utilizing 1H, 1H, 2H, 2H-perfluorodecyl triethoxysilane as the modifier. The study aims to optimize the modifier concentration for enhanced hydrophobicity , while also assessing the coating’s penetration depth and its effect on sandstone breathability. An optimal formulation, consisting of a TiO 2 -to-SiO 2 mass ratio of 75:25 combined with 80 µL of the perfluorodecyl triethoxysilane modifier, yielded exceptional water and oil contact angles of 150.1° and 139.3°, respectively. Even after 210 h of UV exposure, the coating exhibited remarkable stability, with only a minor decrease in contact angles. Furthermore, the treatment effectively preserved the air permeability of the sandstone. This F-modified nanoplate TiO 2 /nanoparticle SiO 2 composite coating demonstrates significant potential for the long-term protection of sandstone cultural relics against environmental weathering, offering a balance of high hydrophobicity and breathability.
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高影响因子
Marine Drugs
·
2025
·Vol. 24
·期 1
·10
·
IF 5.4
Xin Mu,Xinxin Yang,Jian Jiao,Ming Du,Zhenyu Wang
Sea cucumber peptides have been shown to possess a number of functions, including antioxidant, anti-inflammatory, anti-tumor, and anti-fatigue effects, as well as immune regulation and promotion of collagen synthesis. Among these, high F-value oligopeptides are a promising natural active ingredient demonstrating excellent anti-fatigue effects. This study utilized fresh sea cucumbers as the primary raw material, employing membrane separation technology to investigate the simultaneous separation of sea cucumber polysaccharides and peptides. The process for removing aromatic amino acids during the preparation of high F-value oligopeptides from sea cucumbers was optimized, and the mechanism underlying their anti-fatigue effects was explored. A two-step enzymatic hydrolysis method using neutral protease and composite flavor protease was employed, followed by membrane separation using a 10,000 Da molecular weight ultrafiltration membrane, yielding a sea cucumber peptide yield of 45.00 ± 0.12% and a sea cucumber polysaccharide yield of 51.28 ± 0.63%. Following the removal of aromatic amino acids by means of activated carbon adsorption, the F-value of the high-F-value oligopeptides attained 23.82, with a yield of 24.56%. The experimental findings demonstrated that high-F-value oligopeptides exhibited a substantial increase in the swimming duration of mice and a notable enhancement in their grip strength. These observations signified their substantial anti-fatigue potential. Furthermore, studies have indicated that sea cucumber high-F-value oligopeptides reduce metabolites produced by exercise, enhance muscle protection, increase the activity of antioxidant enzymes in the body, and alleviate fatigue, thereby achieving an anti-fatigue effect.
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DOI
PubMed
高影响因子
DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Xiangjun Li,Yuxin Shi,Miaomiao Li,Shengwei Deng,Yinxia Dong,Libo Tong,Zhongze Du,Kuaishe Wang
The exceptional protection of epoxy resin (EP) is restricted in practical applications due to high electrical insulation and inherent microporous defects. In this study, acid-doped polypyrrole (f-PPy)/MXene hybrid nanomaterials incorporated into the EP matrix to construct three-dimensional (3D) conductive network that simultaneously enhances corrosion resistance and imparts antistatic capability. Electrochemical impedance measurements demonstrate a long-term stability, maintaining 9.73 × 10 10 Ω cm 2 even after 14 days of immersion, which is significantly higher than the EP coatings. Compared with pure EP, the composite SiO 2 @f-PPy/MXene/EP coating shows a 3 times reduction in surface resistivity (8.68 × 10 7 Ω m) and exceeds the industrial antistatic threshold by two orders of magnitude. The enhanced anticorrosion is attributed to the synergistic contribution of the triple properties of the SiO 2 @f-PPy/MXene: “labyrinth effect”, redox effect and corrosion inhibition. SiO 2 @f-PPy/MXene 3D conductive network enhances the antistatic ability of EP. This dual-functional strategy addresses the critical gap of combining anticorrosion and antistatic performance in EP coatings and offers a practical route for protective applications on Mg alloys.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 108
·期 10
·e70008
·
IF 3.8
Ying Xue,Zhuo Wang,Caidan Hou,Xin Li,Zixiong Sun
In TiO 2 colossal dielectric ceramics co-doped with In 3+ and Nb 5+ , the electron-pinned defect-dipoles effect is strongly influenced by the adjacent and overlapping interaction between diamond ( Nb 2 5 + Ti 3 + A Ti ${\mathrm{Nb}}_{\mathrm{2}}^{{\mathrm{5 + }}}{\mathrm{Ti}}^{{\mathrm{3 + }}}{{\mathrm{A}}}_{{\mathrm{Ti}}}$ (A = Ti 4+ /In 3+ /Ti 3+ )) and triangle ( In 2 3 + V O · · Ti 3 + ${\mathrm{In}}_{\mathrm{2}}^{{\mathrm{3 + }}}V_{\mathrm{O}}^{ \cdot \cdot }{\mathrm{Ti}}^{{\mathrm{3 + }}}$ ) defect clusters. Although acceptor doping introduces oxygen vacancies ( V O · · $V_{\mathrm{O}}^{ \cdot \cdot }$ ) that facilitate the formation of triangular ( In 2 3 + V O · · Ti 3 + ${\mathrm{In}}_{\mathrm{2}}^{{\mathrm{3 + }}}V_{\mathrm{O}}^{ \cdot \cdot }{\mathrm{Ti}}^{{\mathrm{3 + }}}$ ) defect clusters, this doping inevitably results in the presence of additional diamond ( Nb 2 5 + Ti 3 + A Ti ${\mathrm{Nb}}_{\mathrm{2}}^{{\mathrm{5 + }}}{\mathrm{Ti}}^{{\mathrm{3 + }}}{{\mathrm{A}}}_{{\mathrm{Ti}}}$ (A = In 3+ )) defect clusters. Unfortunately, this structure complexity hinders a clear understanding of the intrinsic relationship between the colossal dielectric properties and low-temperature dielectric relaxation associated with individual defect clusters. Therefore, creating novel defect clusters to achieve high electron localization is crucial for the advanced TiO 2 -based ceramics. Herein, a colossal dielectric constant of up to 3.4 × 10 4 and a low dielectric loss of 0.044 are observed at 1 kHz and room temperature for the first time in cation–anion (In 3+ and F − ) co-doped TiO 2 ceramics. Meanwhile, the materials exhibit excellent frequency stability and meet the temperature requirements defined by the X9R standard. Dielectric relaxation associated with electrons in the low-temperature range of 2–30 K is attributed to the generation of novel diamond defect clusters ( In 3 + Ti 4 + F 2 − ${\mathrm{In}}^{3+}{\mathrm{Ti}}^{4+}{\mathrm{F}}_{2}^{-}$ ). Combined with density functional theory calculations, the notable electronegativity of F − promotes electron localization without relying on V O · · $V_{\mathrm{O}}^{ \cdot \cdot }$ -related defect clusters formations. Overall, the study presents a novel strategy for designing next-generation colossal dielectric ceramics.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Tao Zhou,Yanjun Chen
The advancement of Na 3 V 2 (PO 4 ) 3 has been impeded by its subpar kinetic characteristics, resulting in suboptimal electrochemical performance . In this case, a dual modification strategy involving Ta and F co-doping is employed, along with the incorporation of carbon nanotubes (CNTs), is introduced. Notably, the substitution of high-valence Ta 5+ for V 3+ ions induces an n-type doping effect, thereby increasing the density of free electrons and enhancing electrochemical performance. Moreover, Ta 5+ possesses a comparatively larger ionic radius than V 3+ , which enhances the ease of Na + transport, leading to an increased rate of ionic diffusion. Furthermore, Ta 5+ ions play a crucial role in reinforcing the crystal structure, thereby strengthening the stability of the NVP system. Importantly, during the high-temperature calcination process, the reduction of carbon results in the conversion of Ta 5+ to Ta 3+ , forming a novel conductive TaN phase through its reaction with N 2 . This TaN phase, known for its high conductivity, intercalates into the NVP bulk as interlayers, forming beneficial grain boundaries. Thanks to this unique TaN//NVP heterojunction , the migration of Na + ions is notably accelerated along the grain boundaries rather than within the NVP bulk. The introduction of F contributes to reducing the grain size of active particles, consequently shortening the pathways for Na + migration and improving kinetic properties. Moreover, the presence of carbon layers and the encapsulation of CNTs collaboratively construct a highly conductive cross-linking network, elevating both electronic conductivity and mitigating NVP particle aggregation during high-temperature sintering. Consequently, the modified NVTPF0.07/@CNTs sample exhibits outstanding performance in both half and full cells, underscoring its substantial potential for application in the field of sodium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机固体化学
·
纳米复合材料
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2013
·
IF 5.825
Fa-tang Li,Xiao-jing Wang,Ye Zhao,Ji-xing Liu,Ying-juan Hao,Rui-hong Liu,Di-shun Zhao
A facile and green method was developed for the simultaneous doping of nitrogen, boron, and fluorine in TiO 2 by H 2 TiO 3 via a microwave-assisted route. The ionic liquid (IL) [BMIm]BF 4 serves not only as microwave absorbent but also as a dopant. The IL also shows the ability to self-assemble under microwave irradiation, which causes it to act as an inhibitor for the growth of the TiO 2 particles. The N–B–F-tri-doped TiO 2 obtained exhibits large specific surface area, small crystal size, and a mesoporous structure, and the mechanism for the formation of the N–B–F-tri-doped TiO 2 was proposed. The prepared materials exhibit excellent visible light photocatalytic activity in the degradation of organic pollutants, including methyl orange, rhodamine B, Orange G, and reactive red X, which is attributed to the presence of a Ti–B–N structure on the TiO 2 surface, inducing a narrow band gap of 2.78 eV, and the synergistic effects of N, B, and F, which improve the separation efficiency of the photo-generated electron/hole pairs. The results obtained may provide a new sight for the application of ILs in the microwave-assisted preparation of nanomaterials.
研究领域:
材料科学
·
光催化
·
纳米材料
·
绿色化学
·
环境工程
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高影响因子
危险品化学品经营许可证（带存储）