Polymers
·
2024
·Vol. 16
·期 6
·778
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IF 4.7
Xin Wang,Jinming Liu,Haiming Chen,Shihao Zhou,Dongsheng Mao
With the vigorous development of the Internet of Things, 5G technology, and artificial intelligence, flexible wearable sensors have received great attention. As a simple and low-cost power supply in wearable sensors, the triboelectric nanogenerator (TENG) has a wide range of applications in the field of flexible electronics. However, most polymers are thermally poor conductors (less than 0.1 W/(m·K)), resulting in insufficient heat dissipation performance and limiting the development of TENG. In this study, a high-performance non-woven fabric TENG with strong thermal conductivity (0.26 W/m·K) was achieved by introducing ZrB2into the polyurethane (PU) matrix. The excellent output performance with an open circuit voltage (Voc) of 347.6 V, a short circuit current (Isc) of 3.61 μA, and an accumulated charge of 142.4 nC endows it with good sensitivity. The electrospun PU/ZrB2composites exhibit excellent sensing performance to detect body movements in situ, such as pressing, clapping, running, and walking. Moreover, the generated power can light up 224 LED bulbs as a demonstration of self-powering ability.
研究领域:
材料科学
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能源技术
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DOI
PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Fei Zhao,Shouyang Zhang,Yao Guo,Qiang Song,Yeye Liu,Yameng Jiao,Caixiang Xiao,Qingliang Shen
High-temperature-resistant, high-strength, and lightweight multifunctional aerogels are urgently required for critical thermal management in harsh conditions, but balancing many factors is highly difficult. Zirconium carbide nanowires (ZrCnws) have received increasing attention due to their exceptional high-temperature stability. In this work, ZrCnws aerogels were prepared by freeze-drying and heat treatment methods without metal catalysts. The single ZrCnw shows a cylindrical structure with a smooth surface. The growth of ZrCnws relied on S-L-S mechanism. ZrCnws aerogels have a density of approximately 24.38 mg/cm 3 and low thermal conductivity of 33.8 mW/(m•K) at room temperature. ZrCnws aerogels have 74.88% height retention after 100 cycles of compression at 30% strain and exhibit a specific EMI SE of 1458.61 dB•cm 3 •g −1 in the X band. This work provides a feasible method for ZrCnws aerogels and verifies that the prepared ZrCnws aerogels have potential applications in the fields of thermal insulation and electromagnetic shielding.
研究领域:
材料科学
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物理学
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DOI
高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Xinting Cao,Niaz Ahmad,Chaoyuan Zeng,Haonan Pei,Ze Hua,Ruiwen Shao,Leining Zhang,Wen Yang
Developing high-voltage LiCoO 2 (LCO) is essential in realizing practical all-solid-state lithium batteries (ASSLBs). However, high voltage-induced structural instability and oxygen evolution are crucial for the fast degradation of layered metal oxide cathodes. This study reveals that the zirconization on the near-surface region of LCO shows superior electrochemical performance at high voltage (≥ 4.5 V). High-angle annular dark field-scanning transmission electron microscopy firstly reveals the formation of sub-nanoscale Li 2 CoZrO 4 with disordered rock salt ( α -LiFeO 2 ) phase on the surface of LCO. Furthermore, zirconization could prevent the bending of the Co–O layers at high voltage, significantly inhibiting the formation of microcracks after many cycles and enhancing the structural stability of LCO, as further confirmed by high-resolution transmission electron microscopy. Further, Electron paramagnetic resonance and Electron energy loss spectroscopy provide direct experimental evidence that lattice oxygen on LCO at high voltage has greatly deactivated in sub-nanoscale zirconization (Li 2 CoZrO 4 ). Density functional theory calculations reveal that Li 2 CoZrO 4 enhances the stability of lattice oxygen. Therefore, in ASSLBs, LZSO@LCO cathode exhibits impressive electrochemical cycling stability, e.g., 78.1% capacity retention after 1000 cycles at 0.5 C and 71.2% capacity retention over 100 cycles at 0.1 C at an extremely low temperature of −20 °C.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Hao Chen,Fang Wang,Kaixin Wang,Yadong Wu,Chongshen Guo
Undoubtedly, taking full advantage of near-infrared light (NIR) for the photocatalytic reaction is a promising way to realize the efficient utilization of solar energy. In this work, zirconium carbide (ZrC) has been exploited as a NIR-driven photoactive substance for the simultaneous photodegradation of organic pollutants and photothermal sterilization of Escherichia coli ( E. coli ). The metallic nature and NIR-responsive localized surface plasmon resonance (LSPR) behaviors of ZrC are revealed by both experimental evidence and density function theory (DFT) calculations. ZrC exhibits extremely wide spectral absorbance, excellent NIR-triggered photosensitive effect and photothermal conversion efficiency. Activation kinetics was performed with DFT to investigate the activation process of O 2 to •O 2 – . In addition, a possible NIR-mediated photocatalytic mechanism of ZrC was proposed on the basis of above DFT simulation and radical scavenging experiments. Metallic ZrC with NIR-responsive activity provides a new perspective for designing full-spectrum-driven photocatalysts.
研究领域:
环境科学
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材料科学
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微生物学
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DOI
PubMed
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 9
·096312
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IF 1.449
Junnan Zhang,Xuening Rong,Chang Xu,Aming Xie,Shuxin Deng
The developing of electrically conductive materials with extreme thermostability is of great importance in the field of microwaves absorption (MA). However, the dielectric loss of ZrB2 (a typical high-temperature and conducting ceramic) at microwave band still remains to be unexplored. In this paper, we systematically investigate the chemical structures, dielectric properties and MA performance of ZrB2 ceramic at microwave band. High MA performance can be achieved through the regulation of filler loading ratio of ZrB2, where the maximal absorption reaches −43.0 dB at 13.26 GHz at only 1.5 mm. A multi-polarization resonance loss is thought to be the main reason behind the excellent MA performance of ZrB2. This research opens up the exploration of high-temperature ceramic as MA materials.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 37
·22722-22727
·
IF 3.108
Jing-Xiao Wang,De-Wei Ni,Shao-Ming Dong,Guang Yang,Yan-Feng Gao,Yan-Mei Kan,Xiao-Wu Chen,Yan-Peng Cao,Xiang-Yu Zhang
Nanocrystallized zirconium carbide (ZrC) powder was synthesized by an aqueous solution-based process using zirconium acetate and sucrose as starting reagents. Polyvinyl pyrrolidone (PVP) was used to combine the reactants to form a suitable precursor for ZrC. Through such a novel aqueous solution-based process, fine-scale mixing of the reactants is achieved in an environmentally friendly manner. The formed precursor can be converted to ZrC by carbothermal reduction reaction at 1600–1650 °C. Thanks to a limited amount of residual free carbon, the as-synthesized ZrC powder had an ultra-fine particle size (50–100 nm) and a low oxygen content less than 1.0 wt%. The conversion mechanisms from as-synthesized pre-ceramic precursor to ZrC powder were investigated systematically and revealed by means of FTIR, TG-DSC, XRD, Raman, SEM and TEM.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Sustainable Energy & Fuels
·
2020
·Vol. 4
·期 6
·3102-3114
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IF 5.503
Jian He,Yufei Xu,Zhaozhuo Yu,Hu Li,Wenfeng Zhao,Hongguo Wu,Song Yang
The effective and economically feasible tandem synthesis of γ-valerolactone (GVL), a renowned bio-based platform molecule with great promising applications in the production of drop-in chemicals, liquid fuels and polymers, is significantly vital and challenging. Herein, we for the first time describe a direct and effective catalytic system based on ZrOCl2·8H2O capable of facilitating the one-pot one-step tandem synthesis of GVL from bio-based furfural or furfuryl alcohol in 2-propanol by integrating sequential transfer hydrogenation, ring-opening, and transfer hydrogenation–cyclization reactions. A maximum GVL yield of 63.3% and 52.1% was achieved from furfuryl alcohol and furfural at 200 °C, respectively. The synergistic effect of [ZrO(OH)2]n·xH2O species and Brønsted acid species H+, derived from in situ hydrolysis of ZrOCl2·8H2O, is accountable for its remarkable catalytic performance. Moreover, calcination of the leftover solid after tandem synthesis of GVL could fabricate a hollow microrod ZrO2 material, in which the formation of a microrod morphology and hollow structure was probably attributed to the electrostatic repulsion forces among particles in the alcohol solution and removal of generated humins/coke during the reactions within collected solids via calcination, respectively. Importantly, hollow microrod ZrO2 innovatively featuring a high BET surface area, a large amount of acid–base sites and facile active-site accessibility thereby exhibited a superior performance in the catalytic transfer hydrogenation of biomass-derived aldehydes or ketones to ZrO2 prepared by the precipitation method.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-9
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IF 4.011
Zhao Shijiao,Ma Jingtao,Xu Rui,Lin Xuping,Cheng Xing,Hao Shaochang,Zhao Xingyu,Deng Changsheng,Liu Bing
Zirconium compounds has been widely attention over the last decades due to its excellent physical and chemical properties. Zirconium nitride nanopowders were synthesized via a simple direct carbothermic nitridation process of internal gel derived zirconia in the presence of nano-sized carbon black. The effects of reaction temperature, dwell time and molar ratio of carbon black to Zr (C/Zr) on the phase composition, grain size and crystal parameters of products were studied. Based upon the analysis of crystallite phase evolution and microstructure characterization, it was found that zirconium oxynitride is intermediate product and then O atoms in oxynitride were extracted by oxygen getter, carbon black. Anion sites were directly replaced by N atoms to form rock-salt type nitride in carbothermic nitridation process.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
PHYSICS LETTERS A
·
2025
·
IF 2.6
YuanZe Xu,HaiPeng Si,ShiCai Xu,WeiHao Liu,ZeZheng Zhang,Jian Shi,ShouZhen Jiang
Traditional surface-enhanced Raman scattering (SERS) substrates typically rely on electromagnetic enhancement, which is predominantly generated by noble metal particles. While their practical limitations hinder widespread application. In contrast, semiconductor substrates have garnered increasing attention in the SERS field due to their capacity to address many of the shortcomings associated with noble metal particles. In this study, we investigated the SERS effect and enhancement mechanism of a novel transition metal carbide (ZrC), further enhancing its performance through morphological alterations and element doping. The detection limits for Rhodamine 6G and Methylene blue using the prepared substrate were found to be remarkably low at 1 × 10 -8 M and 1 × 10 -6 M. To elucidate the enhancement mechanism, Density Functional Theory and Finite Element Analysis were employed. These simulations demonstrated that the observed enhancement arises from chemical mechanisms. The charge transfer process between the SERS substrate and the probe molecule resulted in significantly amplified Raman signals.
研究领域:
材料科学
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光谱学
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理论化学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Zhibo Chen,Tohru S. Suzuki,Hailong Wang
High-aspect-ratio ZrB 2 rod crystals were synthesized via a molten-salt-mediated boro/carbothermal reduction using ZrOCl 2 · 8H 2 O/B 4 C/C as the raw material and NaCl as the flux material. This synthesis may improve the poor fracture toughness of monolithic ZrB 2 ceramics. X-ray diffraction and scanning electron microscopy confirmed that the heat-treatment temperature of 1550 °C and the addition of 50 wt% NaCl were the most effective in the preparation of ZrB 2 grains with a high aspect ratio. Thermogravimetric and differential scanning calorimetry was used to study the influence of NaCl addition, which increased the liquid-phase content. Finally, the growth of ZrB 2 grains along the c-axis into rod-like morphology at elevated temperatures was investigated by transmission electron microscopy . This work revealed that the addition of NaCl has a positive effect on the reducing of synthesis temperature and increasing of products particle size. The ZrB 2 rod crystals synthesized have diameters and aspect ratios of approximately 1 μm and 30, respectively.
研究领域:
材料科学
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陶瓷
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晶体生长
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）