CERAMICS INTERNATIONAL
·
2026
·
IF 6
Xinying Zhu,Mingchen Mei,Dingxin Wang,Song Liu,Rui Liu,Xi Kong,Letao Yang,Houbing Huang
Ceramic capacitors with stable dielectric responses at elevated temperatures are of great importance for advanced electronic applications. In this study, high-entropy-engineered (Ba 0.85 Sr 0.15 )TiO 3 –Bi(Mg 2/3 Ta 1/3 )O 3 solid solutions were developed to achieve broad-temperature dielectric stability. Among them, the composition with 25% and 30% Bi(Mg 2/3 Ta 1/3 )O 3 exhibit excellent dielectric properties, exhibiting room-temperature relative dielectric constants of 663 and 680, and dielectric losses of 0.6% and 1.1%, respectively. Particularly, they meet the X9R and X10R specification and dielectric loss of ∼0.6%, with capacitance variation less than ±15% from −74 °C to 265 °C, satisfying the X9R. The composition with 30% Bi(Mg 2/3 Ta 1/3 )O 3 shows the room-temperature dielectric constant of ∼680 and the dielectric loss of ∼1.1%, and showing TCC values within ±15% from −60 °C to 300 °C, which meets the X10R requirement. The improved dielectric temperature stability is associated with high-entropy-induced relaxor behavior together with enhanced high-temperature insulation characteristics, which jointly suppress dielectric loss and leakage current over a broad temperature range. These results demonstrate that high-entropy design is an effective route for developing high-performance temperature-stable dielectric materials for high-temperature capacitor applications.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Jingbiao Ge,Huihui Xue,Yang Yang,Sujuan Zhang,Xiuzhen Zheng,Shifu Chen
To optimize the performance of photocatalytic H 2 production, various effective strategies have been developed to design highly efficient photocatalysts, including morphology control, synergistic reaction design, and utilization of photogenerated charge carriers (PCCs). In this study, a highly efficient Bi-Bi 2 WO 6 /Zn 0.5 Cd 0.5 S (BBWO/ZCS) composite was synthesized by embedding Zn 0.5 Cd 0.5 S (ZCS) nanospheres into Bi-Bi 2 WO 6 (BBWO) microsheets through electrostatic self-assembly method. Although BBWO show poor activity in H 2 generation, it largely improves the performance of ZCS under visible light illumination. When the mass of BBWO is 3 % in the composite, BBWO/ZCS exhibited the highest H 2 production rate (28.0 mmol g −1 h −1 ), much higher than that of pure ZCS. Meanwhile, its apparent quantum efficiency (AQE) is high to 8.45 % at 400 nm. The design of the BBWO/ZCS composite not only improves the migration and utilization efficiency of PCCs, but also offers valuable theoretical insights and experimental references for the development of highly efficient photocatalysts.
研究领域:
材料科学
·
光催化
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可再生能源
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纳米材料
·
环境科学
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DOI
高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Weihao Xia,Haonan Wang,Fengjun Ji,Tiansheng Bai,Xuan Zhou,Jinru Huang,Jingyu Lu,Yuhan Wu,Deping Li,Lijie Ci
Antimony (Sb)-based anode materials suffer from poor cycling stability in potassium-ion batteries (PIBs) due to severe volume changes during charge/discharge processes, which limit their practical application. To address this challenge, a dual strategy of alloying and carbon coating was employed, resulting in the successful synthesis of composite anodes comprising porous carbon-coated SbBi nanoalloys with tunable Sb/Bi atomic ratios. This approach significantly enhances the structural stability and electrochemical performance of Sb-based anodes. The optimized Sb 0.5 Bi 0.5 @C anode exhibits exceptional cycling stability, delivering a high reversible capacity of 316.0 mA h g −1 after 600 cycles at 0.2 C, and remarkable rate capability (230.0 mA h g −1 at 5.0 C). Moreover, it demonstrates improved thermal stability at 45°C, retaining a capacity of 328.6 mA h g −1 after 1000 cycles at 2.0 C. The potassium storage mechanism is elucidated through kinetic analysis and theoretical calculations. Furthermore, full-cell configurations were assembled and evaluated, demonstrating promising practical application potential with similarly outstanding electrochemical performance.
研究领域:
材料科学
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储能
·
电化学
·
纳米材料
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高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Shunqin Luo,Chao Tang,Zhaohui Huang,Chen Liu,Jiawei Chen,Minghao Fang
In this study, bismuth oxyiodide/titanium dioxide (BiOI/TiO 2 ) heterostructures with different molar ratios of Bi and Ti were synthesized by electrospinning and hydrothermal methods . The samples thus synthesized were characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy (TEM), high-resolution TEM, X-ray photoelectron spectroscopy, and ultraviolet–visible diffuse reflectance spectroscopy . The results confirmed the presence of the BiOI/TiO 2 heterojunction with Bi/Ti molar ratios of 0.20–1 by electrospinning and hydrothermal methods . Photocatalytic activity was also evaluated by the degradation of methylene blue (MB) under visible-light irradiation. The 80% BiOI/TiO 2 heterostructure exhibited the best photocatalytic activity for the degradation of MB under visible-light irradiation.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 5
·1-19
·
IF 2.8
He Jiahao,Zhang Guoxin,Xiao Yiyao,Wang Chao,Song Ningning
An effective strategy for improving microwave absorbing performance was proposed in atomically dispersed bimetallic carbon-based composite materials. The atomically dispersed ZnCo-NC@rGO composites were synthesized though metal-mediated formamide (FA) condensation and carbonization. By adjusting the Co/Zn sites loading, the electromagnetic parameters and absorption performance could be effectively optimized. With the Co/Zn ratio of around 0.01, the minimum reflection loss (RL min ) reached − 26.63 dB at absorbing thickness of 1.50 mm, and the maximum effective absorption bandwidth (EAB, RL < − 10 dB) was up to 4.52 GHz (12.78–17.30 GHz) at absorbing thickness of 1.60 mm, covering almost the Ku band. A stronger RL min of − 59.63 dB was obtained with a thickness of 4.70 mm. Different loading of atomically dispersed metal sites induces variations in metal center and ligand structure. This endows ZnCo-NC@rGO excellent impedance matching and synergistic electromagnetic loss effects. In addition, the maximum radar cross section (RCS) reduction value was up to 26.94 dB m 2 at a scattering angle of 0°. This study points out a feasible path for the fabrication of carbon-based ultralight synergistic absorbers.
研究领域:
材料科学
·
电磁学
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高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2017
·
IF 3.169
Xiong Xu,Jianying Yu,Lihui Xue,Canlin Zhang,Bianyang He,Min Wu
To cater for the concept of global green development, it is of importance, in the bituminous road domain, to achieve the objective of the high-quality rejuvenation of waste bitumen. This paper investigates physical properties, rheological properties, morphology and molecular structure of rejuvenated SBS modified bitumen (SMB) with 1, 4-butanediol diglycidyl ether (BUDGE) or trimethylolpropane triglycidyl ether (TMPGE). The results of physical properties indicate that BUDGE and TMPGE can both improve the low-temperature ductility and penetration of aged SMB, and by contrast, BUDGE can make the aged SMB more flexible at low temperature. From the rheological properties, BUDGE or TMPGE can help restore the crack resistance at low temperature and somewhat decrease the rutting resistance at high temperature, which relies on the reduction of fatigue factor and rutting factor of aged SMB. FTIR spectra and fluorescence images show that the original structure of SBS can be partly rebuilt through the chemical reaction between the terminal groups on BUDGE or TMPGE and the oxygen-containing reactive groups on degraded SBS.
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高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2024
·
IF 3.2
Shiwen Song,Song Xiang,Qiya Liu,Min Zhang
A series of Bi/Sn co-doped aluminosilicate glasses were prepared and the optical and structural properties of the samples were investigated. The near-infrared (NIR) luminescence properties of the glass were significantly improved by the co-doping of Bi and Sn. The NIR emission peaks of samples exhibit near 1220 nm. The addition of SnO changes the glass structure and induces a decrease in the number of negative charges in the local field of Bi, which causes the Bi valence state to change from a high valence state to a low valence state. The appropriate amount of Bi 2 O 3 increases the number of Bi luminescent centers and realizes the transformation of the luminescent centers from Bi + to Bi 0 . These results suggest that regulating the doping concentration of SnO and Bi 2 O 3 is a convenient method to control the valence state of active ions and enhance the NIR luminescence properties of aluminosilicate glasses.
研究领域:
材料科学
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光学材料
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光子学
·
玻璃化学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 46
·16584-16592
·
IF 7.059
Sheng Wu,Puxian Xiong,Xiaoqi Liu,Yubin Fu,Quan Liu,Mingying Peng,Yan Chen,Zhijun Ma
A blue emitting phosphor Na2Y2B2O7:Bi3+ was synthesized by a solid state reaction method. The structure characteristics, concentration, temperature-dependent luminescence and light emitting diode (LED) device performance were systematically studied. Adjustable photoluminescence (PL) from blue to green under different excitation wavelengths from 320 to 390 nm was observed, which is attributed to the complex energy transfer between multiple Bi3+ centres. Moreover, strong absorption in the near ultraviolet region (350–400 nm) was observed in Na2Y2B2O7:Bi3+, which is desirable for LEDs excited by near ultraviolet chips. In addition, a thermal quenching experiment was carried out and the calculated activation energy was 0.28 eV, indicating that this new Na2Y2B2O7:Bi3+ phosphor has good thermal stability. Finally, we explored the application of the Na2Y2B2O7:Bi3+ phosphor by encapsulating LED devices. The device Commission of Illumination (CIE) coordinates are (0.3572, 0.3407), and a high color rendering index (CRI) of 91.1 and a low corresponding color temperature (CCT) of 4480 K under 60 mA current were recorded. These characteristics show that this phosphor can be used to prepare white LED devices excited by near ultraviolet chips.
研究领域:
材料科学
·
光电子学
·
固态照明
·
发光材料
·
磷光体化学
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DOI
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Yongliang Cui,Sufu Liu,Bo Liu,Donghuang Wang,Yu Zhong,Xuqing Zhang,Xiuli Wang,Xinhui Xia,Changdong Gu,Jiangping Tu
The notorious lithium dendrite growth, causing the safety concern, hinders the practical application of high-capacity Li metal anodes for rechargeable batteries. Here, a robust and highly ionic conductive solid electrolyte interphase (SEI) layer to protect Li metal anode is in-situ constructed by introducing trace additive of tetrapotassium heptaiodobismuthate (K4BiI7) into electrolyte. The K4BiI7-added electrolyte enables Li metal anode to display a stable cycling for over 600 cycles at 1.0 mA cm−2/1.0 mAh cm−2 and over 400 cycles at 5.0 mA cm−2/5.0 mAh cm−2. In situ optical microscopy observations also conform the suppression of Li dendrites at high current density. Moreover, the in-situ SEI layer modified Li anode exhibits an average Coulombic efficiency of 99.57% and less Li dendrite growth. The Li-S full sells with the modified electrolyte also show improved electrochemical performance. This research provides a cost-efficient method to achieve a highly ionic conductive and stable SEI layer toward advanced Li metal anodes.
研究领域:
电化学
·
能源材料
·
电池技术
·
材料科学
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.9
Shuyan Qi,Yang Wang,Ling Guan,Xu Hu,Haiyang Li
This study addresses antibiotic water pollution by synthesizing Zr-doped Bi₂₄O₃₁Cl₁₀ (Bi₂₄(₁₋ₓ)Zr₁₈ₓO₃₁Cl₁₀) photocatalysts via hydrothermal method for tetracycline hydrochloride (TC-HCl) removal. Zr doping ratios (6–14%) were systematically investigated, with the optimal BZOC4 (12% Zr) degrading 91.24% of 20 mg/L TC-HCl within 120 min under 500 W xenon lamp irradiation (pH = 9). Its reaction rate constant (0.0239 min −1 ) is triple that of pristine Bi₂₄O₃₁Cl₁₀. Zr doping reduces the band gap from 3.12 eV to 2.8 eV, improves visible light utilization (absorption edge red-shifted to 525 nm), accelerates electron transfer, and reduces e − /h + recombination—supported by UV –Vis DRS, PL, and electrochemical tests. Superoxide radicals (O₂ − ·) and holes (h + ) are primary active species, confirmed by radical trapping and ESR. TOC analysis confirms 32.4% mineralization of TC-HCl to CO₂ and H₂O.This work offers new design strategies for bismuth halide-based photocatalysts in antibiotic remediation by integrating structural regulation and electronic modulation via Zr doping.
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高影响因子
Advanced Science
·
2026
·
IF 14.1
Jingdan Lei,Kai Xu,Kunpeng Zhao,Junzhuo Zhou,Haotian Gao,Yifan Yuan,Tian-Ran Wei,Min Zhu,Qihao Zhang,Franck Gascoin,Xun Shi
Thermoelectric Mg 3 (Sb, Bi) 2 has emerged as a rising star in virtue of its promising thermoelectric performance and abundant constituent elements. However, its practical application is hindered by challenges in synthesis and the strong coupling between electrical and thermal transport properties. Herein, we propose a dual-pronged strategy that combines grain boundary engineering and phonon engineering to decouple electron and phonon transport in Mg 3 (Sb, Bi) 2 . By employing a tantalum-tube encapsulated melting technique together with Cu doping, the grain size is markedly increased to ∼25 µm, effectively suppressing carrier grain boundary scattering and enabling single-crystal-like electrical transport with a high carrier mobility exceeding 200 cm 2 V −1 s −1 . Meanwhile, atomic-scale alloy disorder and nanoscale Mg 2 Cu precipitates introduce strong phonon scattering, leading to an ultralow lattice thermal conductivity of 0.36 W m −1 K −1 . Eventually, a peak zT of 1.9 at 750 K and a high conversion efficiency of 10.6% at ΔT = 488 K are achieved, demonstrating the competitive performance of these materials and devices. This study not only provides new insights into the manipulation of grain boundary scattering, but also demonstrates the great promise of Mg 3 (Sb, Bi) 2 for waste-heat harvesting.
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DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 15
·3413-3421
·
IF 7
Qiaorong Tang,Lu Shi,Bing Yang,Wei Liu,Baoxin Li,Yan Jin
The bacterial resistance due to the abuse of conventional antibiotics is regarded as a major problem for bacterial-induced infections and chronic wound healing. There is an urgent need to explore alternative antimicrobial strategies and functional materials with excellent antibacterial efficacy. Herein, guanosine monophosphate (GMP) and glucose oxidase (GOD) were coordinated with copper ions to obtain a bi-functional hybrid nanoflower (Cu-GMP/GODNF) as a cascade catalyst for promoting antibacterial efficacy. Besides the efficient conversion of glucose to hydrogen peroxide, the produced gluconic acid by loading GOD can supply a compatible catalytic environment to substantially improve the peroxidase activity for generating more toxic reactive oxygen species (ROS). So, the glucose-powered cascade catalytic reaction effectively killed bacteria. Moreover, H2O2 self-supplied by glucose can reduce harmful side effects of exogenous H2O2. Meanwhile, the adhesion between the Cu-GMP/GODNF and the bacterial membrane can enhance the antibacterial efficacy. Therefore, the achieved bi-functional hybrid nanoflower exhibited high efficiency and biocompatibility for killing bacteria in diabetes-related infections.
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DOI
PubMed
高影响因子
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