International Journal of Pavement Engineering
·
2022
·
IF 4.178
Junyan Wang,Xin Yu,Gongying Ding,Jingjing Si,Miaomiao Xing,Renxuan Xie
Biobased cold-mix epoxy asphalt (BCEA) was prepared by adopting biodiesel and epoxy soybean oil as asphalt solvent and compatibilizer. The strength and toughness attenuation laws under freeze–thaw (FT) cycles of BCEA were studied through tensile tests, flexural tests, and dynamic mechanical analysis. The attenuation mechanism was explored through scanning electron microscopy, Fourier transform infrared spectroscopy and water absorption tests. The results showed that the first FT cycle significantly weakened the strength and toughness of BCEA. After the third cycle, the attenuation rate of storage modulus, loss tangent, and glass transition temperature of BCEA declined. The attenuation mechanism of BCEA is as follows: (1) post-curing and destruction of the cross-linking network, (2) agglomeration and aging of asphalt, and (3) diffusion and reaction of water. This research provided a theoretical basis for the application of BCEA.
研究领域:
材料科学
·
土木工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Shujun Qiu,Longde Duan,Errui Wang,Jiaxiao Meng,Fen Xu,Lixian Sun,Hailiang Chu
The development of cathode materials exhibiting high capacity and superior cycling performance plays a pivotal role in enhancing the energy density of lithium-ion batteries (LIBs). In this context, lithium-rich layered oxides (LLOs) have emerged as leading candidates among cathode materials owing to their exceptionally high specific capacities. However, prolonged cycling induces the detrimental interfacial reactions between LLOs and electrolytes, leading to oxygen release, transition metal dissolution, and structural microcracks, collectively driving progressive voltage fade and capacity deterioration. In this study, lithium tri(tert-butoxy)hydridoaluminate (LTBA) was employed as a functional electrolyte additive to optimize the electrochemical performance of a model Li-rich layered oxide cathode (Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 , denoted as LMNCO). Remarkably, the LTBA-modified LMNCO exhibited a capacity retention of 83.6% after 300 cycles at 1 C, significantly outperforming the bare electrolyte system (only 45.6% retention). Notably, the voltage fade in LTBA-modified electrolyte was attenuated to 1.31 mV per cycle, representing a 39.4% reduction compared to conventional electrolyte (2.16 mV per cycle). The experimental results indicate that the LTBA additive in electrolyte acts as an HF scavenger and moderate reducing agent, preventing transition metals from dissolving in the LMNCO cathode.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Radiation Research and Applied Sciences
·
2025
·
IF 2.5
Yixiang Liao,Chuyuan Mao,Jinfan Zhang,Guowei Wang,Guoqing Liu,Qiang Yan,Zhengxin Wu,Yong Liu
In this study, erbium (Er)-doped bismuth tungstate (Bi 2 WO 6 ) polycrystalline materials were synthesized using a hydrothermal method. The synthesized products were then systematically characterized through X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy analyses. Moreover, the shielding performance of Er-doped Bi 2 WO 6 against gamma rays was investigated by analyzing its linear attenuation coefficient (LAC), mass attenuation coefficient (MAC), half-value layer (HVL), and tenth-value layer (TVL). The results indicated that Er 3+ ions were successfully incorporated into the crystal lattice of Bi 2 WO 6 without altering its crystal structure. Moreover, as the Er 3+ doping ratio increased, the morphology of Bi 2 WO 6 evolved from a lamellar stacking structure to a more densely clustered flower-like spherical structure. The shielding performance of Bi 2 WO 6 against 59.5-keV gamma rays was significantly enhanced by Er 3+ doping. When the Er 3+ concentration was 12.5 mol%, the LAC, MAC, HVL, and TVL values were 35.66 cm −1 , 12.6 cm 2 /g, 0.019 cm, and 0.065 cm, respectively. For the attenuation of high-energy gamma rays (661.6, 1173, and 1332 keV), an increase in the Er 3+ content resulted in a slow increase in the LAC, small decreases in the HVL and TVL, and almost no change in the MAC.
研究领域:
材料科学
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核工程
·
晶体学
·
辐射屏蔽
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2014
·
IF 4.331
Zaisheng Yan,Helong Jiang,Xiaohong Li,Yuan Shi
The removal of pyrene and benzo[ a ]pyrene (B a P) were investigated in freshwater sediments with amendment of seven different organic matters including cyanobacteria-derived organic matter (COM), plant-derived organic matter (POM), and humic substances (HS). During the 210 days of experiments, the amendment of COM or HS enhanced significantly the removal of pyrene and B a P in sediments, especially with fresh COM (FCOM) treatment much superior to HS. On the contrary, degradation of these polycyclic aromatic hydrocarbons (PAHs) was not significantly improved and even inhibited in POM-amended sediments. The first-order rate constants of pyrene and B a P degradation in the FCOM-amended sediments reached 0.00540 ± 0.00017 d −1 and 0.00517 ± 0.00057 d −1 , respectively, and were about three and five folds of those in the control treatment. The enhanced PAHs degradation in FCOM-amended sediments was related to higher PAH-degrading bacteria number and bioavailability with a result of biostimulation and priming effect by labile carbon and high-value nutrition in FCOM. Thus, this study improved our understanding about effects of settled biomass from cyanobacterial blooms, which occurred frequently in eutrophic aquatic ecosystems, on the natural attenuation of PAHs in sediments. Furthermore, this study would also help develop a new promising approach to remediate PAH-contaminated sediments through utilization of cyanobacterial bloom biomass.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2017
·
IF 4.9
Cui Zhang,Jian Lu,Jun Wu,Yongming Luo
Ulva prolifera ( U. prolifera ) has been frequently involved in terrible algal proliferation in coastal areas. Although it is known to be associated with green tide, its contribution to the natural attenuation of the polycyclic aromatic hydrocarbons (PAHs) in seawater has not been evaluated. In this study, the removal of phenanthrene using U. prolifera collected from coastal water with green tide blooming was investigated. The results showed that phenanthrene could be removed efficiently in the presence of both the live and heat-killed U. prolifera . The phenanthrene concentrations of the live algae treatment decreased smoothly from 10.00 to 0.80 μg L − 1 through the whole process, while those of the heat-killed algae treatment decreased sharply from 10.0 to 2.71 μg L − 1 in one day and kept constantly after that. The in situ monitoring and visualizing using laser confocal scanning microscopy (LCSM) confirmed the accumulation of phenanthrene in U. prolifera . The increase in nutrient and temperature led to the increase of phenanthrene removal rate, while the salinity had less influence on the removal of phenanthrene. The removal efficiency by U. prolifera had a good linear relationship with phenanthrene initial concentration (r 2 = 0.999) even at 100 μg L − 1 which was higher than its environmentally relevant concentrations. High removal efficiency (91.3%) was observed when the initial phenanthrene concentration was set at environmental relevant concentration (5 μg L − 1 ). Results of this study demonstrate a potential new natural attenuation process for typical PAHs in coastal water during the outbreak of green tide. These findings indicate that the outbreak of harmful green tide algae may bring positive environmental benefits in the terms of the removal of harmful organic pollutants from coastal waters.
研究领域:
环境科学
·
海洋生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Hang Peng,Shi-Xi Zhao,Chao Huang,Lü-Qaing Yu,Zou-Qiang Fang,Guo-Dan Wei
Layered lithium-rich transition-metal oxides (LRMs) have been considered as the most promising next-generation cathode materials for lithium-ion batteries. However, capacity fading, poor rate performance, and large voltage decays during cycles hinder their commercial application. Herein, a spinel membrane (SM) was first in situ constructed on the surface of the octahedral single crystal Li1.22Mn0.55Ni0.115Co0.115O2 (O-LRM) to form the O-LRM@SM composite with superior structural stability. The synergetic effects between the single crystal and spinel membrane are the origins of the enhancement of performance. On the one hand, the single crystal avoids the generation of inactive Li2MnO3-like phase domains, which is the main reason for capacity fading. On the other hand, the spinel membrane not only prevents the side reactions between the electrolyte and cathode materials but also increases the diffusion kinetics of lithium ions and inhibits the phase transformation on the electrode surface. Based on the beneficial structure, the O-LRM@SM electrode delivers a high discharge specific capacity and energy density (245.6 mA h g–1 and 852.1 W h kg–1 at 0.5 C), low voltage decay (0.38 V for 200 cycle), excellent rate performance, and cycle stability.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xue Liu,Jianguo Deng,Fuhan Mai,Xin Li,Guohong Pu,Zhihua Deng,Lanxiang Ji,Xiaofeng Bai,Quanping Zhang,Yuanlin Zhou
The development of multifunctional radiation protection materials is crucial to ensure the safety of personnel and equipment in complex nuclear environments. Herein, a flexible radiation protection material integrating self-healing, thermal management, and behaviour response was prepared from Ta 4 C 3 T x MXene, Hydrogen-terminated phenyl polysiloxane, and Polyborosiloxane through esterification, “thiol-ene click” hydrosilylation reaction using L(+)-Cysteine as a bridge. The results showed that when Ta 4 C 3 T x MXene reached 20 wt%, the tensile strength of composite was 0.6321 MPa with the self-healing rate at 90.22 %. And the gauge factor of the material reached 25.83 at 100 % strain. This compensated for the gap between low strain and high sensitivity. Additionally, the multilayer structure of Ta 4 C 3 T x MXene and the absorption properties of Tantalum enable the material to attenuate γ-rays through absorption and scattering mechanisms. The attenuation capability of Ta 2 O 5 and Ta 4 C 3 T x MXene fillers for 59.6 KeV γ-rays was compared at the same Tantalum content. When the Tantalum content reaches 23.81 wt%, the Ta 4 C 3 T x MXene composite contains 20 wt% filler and has an attenuation coefficient of 0.757. Similarly, the Ta 2 O 5 composite contains 22.5 wt% filler and has an attenuation coefficient of 0.734. These results are significant for improving temperature and behaviour monitoring of workers in low-temperature nuclear environments.
研究领域:
材料科学
·
核工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2023
·Vol. 16
·期 6
·8497-8503
·
IF 9.9
Zou Jian,Wu Zhenrui,Tang Ruilin,Ren Zhenzhen,Niu Xiaobin,Wang Liping
Copper sulfide (CuS) is a promising cathode for lithium-ion batteries (LIBs) due to its impeccable theoretical energy density (∼ 1015 Wh·kg −1 and 4743 Wh·L −1 ). However, it suffers from voltage decay leaded energy density loss and low energy efficiency, which hinders its application. In this work, with combined ex-situlin-situ X-ray diffraction (XRD) and electrochemical analysis, we explore detailed degradation mechanisms. For the voltage decay, it is attributed to a spontaneous reaction between CuS cathode and copper current collector (Cu CC). This reaction leads to energy density loss and active materials degradation (CuS → Cu 1.81 S). As for energy efficiency, CuS undergoes a series of phase transformations. The main phase transition processes are CuS → α -LiCuS → Li 2− x Cu x S + Cu → Li 2 S + Cu for discharge; Li 2 S + Cu → Li 2− x Cu x S → β -LiCuS → CuS for charge. Here, α -LiCuS, β -LiCuS, and Li 2− x Cu x S are newly identified phases. These phase changes are driven by topotactic-reaction-related copper diffusion and rearrangement. This work demonstrates the significance of transition-metal diffusion in the intermediates formation and phase change in conversion-type materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Jing Wang,Yuping Wang,Junye Cheng,Yiru Fu,Yao Li,Wangli Nie,Jingwei Wang,Bin Liu,Deqing Zhang,Guangping Zheng,Maosheng Cao
Defect engineering could provide new ideas for the design of transition metal disulfide electromagnetic wave (EMW) absorbers with high performance. Since the effects of dipoles on impedance matching and EMW absorption are crucial for the development of novel absorbers, the polarization attenuation dependence on defect engineering should be understood at micro- and macro-scales. In this paper, it is found that the defect-rich WS 2 nanoflowers synthesized by the cold plasma method possess excellent EMW absorption properties. Cold plasma treatment of materials is easy to perform and maintains the original shape of the material to a high degree. The formation of defects results in abundant electrochemically active sites, increased multiple reflection losses, improved dielectric properties and impedance matching in the materials. The RL min of the defect-rich material with a thickness of 3.19 mm is as high as −54.36 dB at 8.16 GHz, and the effective absorption bandwidth is 4.72 GHz. The results reveal that the formation of defective vacancies enhances the effects of dipole polarization of the material on improving its EMW absorption properties. Thus, this work provides not only a facile preparation route for novel EMW-absorbing materials, but also a new strategy for tunning defects in transition metal disulfides.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2021
·
IF 4.43
Sailing Lei,Zhenzhen Quan,Xiaohong Qin,Jianyong Yu
In electrospinning, the whipping jet plays a significant role in determining the microstructure of electrospun nanofibers . So far, however, it is extremely challenging to control the behavior of whipping jet precisely owing to its small diameter and rapid motion. In the present work, dynamic models are established to predict the velocity of whipping jet, where the velocity is tuned by surface charge. It is found that the variation of velocity of whipping jet with motion time follows a scaling law with an exponent of −1/3. Moreover, the relationship between velocity of whipping jet and axial distance obeys a scaling law with an exponent of −1/2. In addition, the theoretical predictions show a good agreement with the experimental results. This work provides a new strategy for the accurate control of velocity and stretching of whipping jet, promoting the morphological and structural design of electrospun nanofibers .
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
·
2019
·
IF 1.433
Sangmin Lee,Jaebum Son,Dong Geon Kim,Joonbum Choi,Yong Kyun Kim
Production of plastic scintillators using 3D printing technology has gained increased interest, and related researches are being published. However, research results show that the performance of plastic scintillators, such as light yield or decay time, is still poor compared to that of commercial products. In order to improve the scintillator performance, a UV-curable solution was prepared by applying ADS148BE, a new wavelength shifter, from which a plastic scintillator was fabricated using a UV LED curing machine. The maximum emission wavelength of the prepared scintillator occurred at 429 nm. The transmittance at peak emission was 49%. The scintillation efficiency was measured to be 43% of BC408 (Saint-Gobain Crystals). The light yield was determined to be 35% of BC408. It is about 1.9 times better than that of a scintillator fabricated by a UV lamp of a previously published paper [12]. The light output was estimated as 33.7% of BC408. The decay time was approximately 2.46 ns. This is the relative value measured after setting the decay time of the reference scintillator to match the manufacturer’s data. Compared to the UV-curable plastic scintillator of previously reported studies, we have improved the overall performance of our sample and will be able to make precise shapes with a 3D printer.
研究领域:
材料科学
·
核技术
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Results in Physics
·
2019
·
IF 3.042
Dongyong Shan,Jun He,Lianwen Deng,Shuoqing Yan,Heng Luo,Shengxiang Huang,Yunchao Xu
Incorporation of magnetic loss component is more favorable to high-performance microwave absorbing materials. In this paper, the NiFe 2 O 4 -decorated Ti 3 C 2 T x MXene composites were synthesized by the in-situ chemical co-precipitation method. The magnetic NiFe 2 O 4 nanoparticles were attached on the surfaces or inserted into the interlayers of Ti 3 C 2 T x MXene. Interestingly, we reduced effectively complex permittivity and enhanced magnetic loss by increasing the NiFe 2 O 4 content on Ti 3 C 2 T x MXene. Stronger electromagnetic attenuation ability and preferable impedance matching property were achieved and considered to be responsible mainly for improving absorbing peaks as well as bandwidth of the NiFe 2 O 4 -Ti 3 C 2 T x MXene composite. In particular, the NiFe 2 O 4 -Ti 3 C 2 T x -20 sample exhibited an optimal effective absorption bandwidth ( RL < −10 dB) of 7.68 GHz with the material thickness of only 1.5 mm. These findings are believed to pave the way of further promoting microwave absorption performance of Ti 3 C 2 T x MXene from magnetic functionalized decoration of view.
研究领域:
材料科学
·
电磁学
✓ 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）