JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Peibo Li,Guoqiang Luo,Xiaoshan Zhang,Xiao Wang,Zhihao Wu,Yi Sun,Qiang Shen
As one of the most commonly used binary alloys , the effect of intermetallic compounds (IMCs) of Al-Cu alloys in powder metallurgy on their structure and properties is instructive for tailoring Al-Cu alloys for different applications. In this investigation, a series of Al-Cu-Ag alloys with varying Cu compositions were fabricated via hot pressing. TEM analysis identified CuAl 2 as the primary intermetallic compounds , with Ag existing in forms including Ag 2 Al, elemental Ag, and an Ag-(Cu) solid solution . The modulation of Cu content influenced the state of Ag and the mechanical behaviors of the Al-Cu-Ag alloy. Particularly, the high Al/Cu alloy, benefiting from a synergistic effect comprising stacking faults, nanoscale precipitates, and solid solutions, exhibited outstanding mechanical properties. Conversely, the Al-50Cu-3Ag alloys displayed significant brittleness , attributed to the adverse impact of large-scale intermetallic compounds and increased grain size due to the formation of CuAl 2 . The incorporation of nanoparticles effectively mitigated the grain size in high Al/Cu alloys. This study elucidates the correlation between the evolution of intermetallic compounds and composition in Al-Cu alloys, offering novel insights into the reinforcement of both Al-based and Cu-based alloys.
研究领域:
材料科学
·
金属学与热处理
·
粉末冶金
·
结构材料
·
合金设计
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DOI
高影响因子
Small
·
2026
·
IF 11.8
Kainan Hong,Yutao Lu,Fuyao Huang,Yichi Zhang,Zihao Zhou,Yuanyuan Zheng,Ya Huang,Huisheng Peng,Peining Chen
Electronic textile is a promising platform for next-generation wearable systems, where transparent conductive fibers are essential building blocks for optoelectronic functions. Current transparent conductive fibers are typically realized by coating conductive nanomaterials onto a polymer fiber substrate. However, this strategy generally suffers from weak interfacial adhesion and thus causes conductivity degradation under mechanical deformations or environmental exposure. In this work, we report a high-performance transparent conductive fiber based on disulfide-functionalized thermoplastic polyurethane. Silver nanowires (AgNWs) react with sulfur atoms in the disulfide groups to form robust Ag-S covalent linkages, thereby stabilizing the AgNWs network. The resulting fibers exhibit a balanced combination of high conductivity (2.7 × 10 3 S/m) and optical transmittance (81%). Their conductivity and optical transmittance can be tuned by adjusting the AgNWs loading, while maintaining high transparency and superior mechanical durability under harsh conditions, including 1000 cycles of bending, twisting, and abrasion. We further integrate these fibers into electroluminescent fibers and display textiles through wrapping or weaving. These devices exhibit high brightness, uniform emission, and long-term operational stability. This interfacial engineering strategy improves compatibility between conductive networks and flexible polymers, enabling high-performance electronic fibers and textiles.
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高影响因子
Journal of Bionic Engineering
·
2022
·Vol. 19
·期 2
·507-515
·
IF 2.995
Li Mingrui,Wei Yongjie,Ma Bowen,Hu Yang,Li Dongdong,Cui Xiaoqiang
The loosening of implant due to bacterial infection brings great difficulties to the implantation of bionic titanium devices. In this study, the Zeolitic Imidazolate Framework 8 (ZIF-8) and silver ions were added to the surface of titanium alloy to obtain a uniform coating, which has nice biological activity and antibacterial property. The material structure characterizations, such as X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), proved that titanium is successfully modified with ZIF-8 and silver ions. It has micro- and nano-level characteristics, rough porous morphology, and excellent apatite inducing ability. The water contact angle experiment shows that the addition of ZIF-8 greatly increases the hydrophilicity of material, which provides conditions for the attachment of osteoblasts. The polarization curve obtained from the electrochemical test proves that the addition of ZIF-8 coating improves the corrosion resistance of titanium. The release of silver ion has a strong growth inhibitory effect on E. coli , and exhibits excellent antibacterial properties. Therefore, the preparation of ZIF-8/Ag coatings on 3D printed titanium provides a new option for the development of orthopedic implants.
研究领域:
生物材料学
·
表面工程
·
纳米医学
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骨科植入物
·
抗菌治疗
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DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 10
·期 9
·7783-7793
·
IF 1.5
Fen Wang,Xian Jing Yang,Qi Guo Chen,Mei Chao,Chun An
Pd/Ag/Cu electrode was successfully prepared on Ag dendrites with Cu substrate (Ag/Cu) by galvanic replacement reactions, and was characterized by scanning electron microscopy, X-ray diffraction and transmission electron microscopy. The electroreductive dechlorination reaction of 2,3-dichlorophenol on Pd/Ag/Cu electrode was investigated by cyclic voltammetry and in situ FTIR techniques. Compared with Pd/Cu, Ag/Cu and Cu electrodes, Pd/Ag/Cu electrode exhibited the highest electrocatalytic activity for electroreductive reaction of 2,3-dichlorophenol. C-Cl bond was broken by reaction of adsorbed 2,3-dichlorophenolate with (H) ads Pd on Pd/Ag/Cu electrode surface. The main intermediate was 2-chlorophenolate, and the final product was phenolate.
研究领域:
环境化学
·
电催化
·
材料科学
·
分析化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Rujing Wang,Jingyu Peng,Song Wang,Jialin Bai,Hanzhuang Zhang,Rongmei Yu,Wenyu Ji
Metal film electrodes are frequently adopted in flexible quantum-dot light-emitting diodes (FQLEDs) to form microcavity structures, which accelerate the recombination of excitons and thereby enhancing the efficiency of devices, especially under high driving current density. However, metal films prepared by thermal evaporation grow according to the Volmer-Weber nucleation mechanism, thereby resulting in the formation of numerous metal islands on the target substrate. The serious leakage current and light scattering (hence weakened microcavity effect) caused by these islands lead to inefficient FQLEDs. Here we fabricated a highly uniform and smooth Ag-based flexible electrode by utilizing an ultrathin polyethyleneimine as the nucleation-inducing seed layer. A smooth surface with a root-mean-square of approximately 3.7 nm and an ultralow sheet resistance of 3.65 Ω sq −1 have been obtained for the Ag film with a thickness of only 16 nm. Thus, a high-efficiency FQLED is achieved with the maximum external quantum efficiency up to 25.6 %. Furthermore, this device exhibits ultralow efficiency roll-off, characterized by the external quantum efficiency of over 20 % across an extremely wide luminance range, from 300 to 160,000 cd m −2 , meeting all display and lighting requirements.
研究领域:
光电子学
·
纳米材料
·
柔性电子学
·
量子点器件
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DOI
高影响因子
SOLAR ENERGY
·
2023
·
IF 6.7
Jie Yu,Dan Zhu,Cong Qi,Wenjie Zhang
In order to collect solar energy into vapor more efficiently, Ag@Fe 3 O 4 nanoparticles with good photothermal properties were prepared in this study, and nanoparticle films were prepared by vacuum filtration of nanofluids to load nanoparticles on filter membrane, which exhibit good evaporation performance. The effects of fluid depth, nanoparticle loading surface density and light intensity on the evaporation performance were investigated. The experiments showed that the evaporation performance is the best at a light intensity of 2 sun, a surface density of 1.0 g/m 2 and a fluid depth of 30 mm (evaporation efficiency of 0.599 and heat efficiency of 0.824). In addition, the surface density is not conducive to the increase of water temperature when it exceeds a certain range. The increase of nanoparticle film surface density is mainly beneficial to evaporation rather than heat storage.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Xuelian Chen,Tong Zhou,Xiqiang Pan,Hong Li
We demonstrate a simple approach for fabricating polydopamine microcapsules decorated with silver nanoparticles (Ag@PDA MCs) as highly efficient catalysts for water purification . Polydopamine microcapsules (PDA MCs) were formed on the MnCO 3 template from self-polymerization and the removal of template under mild EDTA solution, followed by in situ reduction of Ag + by PDA and growth of monodispersed Ag nanoparticles . Under optimized conditions, the Ag@PDA MCs exhibits 41.56 wt% of Ag loading contents and superior catalytic performance for the degradation of organic pollutants with rate constant of 2.93 min -1 for methylene blue and 1.03 min -1 for 4-nitrophenol. The excellent catalytic activity can mainly be ascribed to high surface roughness of microcapsules, high Ag loading ratio, and uniform distribution of Ag nanoparticles . In addition, this catalyst can be recycled for five times with degradation efficiency higher than 98%. The Ag@PDA MCs possessed fast reduction rate, high catalytic activity, and good recyclability as well as facile preparation and easy separation, showing great potential for the application in wastewater treatment .
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高影响因子
TALANTA
·
2023
·
IF 6.1
Tingting Zhang,Gongying Wang,Juan Bao,Chang Liu,Weihua Li,Zhe Kong,Xiuyun Sun,Jiansheng Li,Rui Lu
A crucial issue in analytical science and physiology is the detection of histamine with high sensitivity, specificity and credibility, which served as an important neurotransmitter in biofluids. Despite the high sensitivity of surface-enhanced Raman spectroscopy (SERS) at the level of single molecule, there are still challenges in providing high sensitivity for histamine with a small cross section. For the selective detection of histamine using SERS, a highly sensitive sandwich structure substrate combining Fe 3 O 4 and an Ag-based SERS nanotag was developed. The Fe 3 O 4 @SiO 2 –COOH served as a capture component for enriching histamine. Upon functionalized Ag nanoparticles with glycine (Gly) and (3-Aminopheyonyl) boronic acid (APBA), they were then used to connect with histamine and serve as a SERS nanotag, respectively. A linear relationship between the Raman intensity and the histamine concentration was observed over the range 10 −4 -10 −8 M with a limit of detection of 7.24 × 10 −9 M. This methodology also exhibited good selectivity in the presence of other neurotransmitters. With our new approach, histamine can be detected sensitively and reliably in fish samples, which indicates the potential prospect of an effective method for analyzing histamine in complex specimens.
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PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Yinghua Li,Wenyue Yin,Ning Yang,Yuxin Li,Chaoqun Zhu,Lu Liu,Haibo Li,Xi Chen
A kind of easily recyclable and composite photocatalyst based on Ag/AgCl/Bi 2 O 3 /BiFeO 3 (AABB) and modified zeolite (MZ)/activated carbon (AC) were made, and investigated for the degradation of levofloxacin hydrochloride (Lev-HCl) in wastewater. The structures and morphologies of AABB@loading materials were firstly characterized. The results showed that under visible light , the optimal conditions for photodegradation were: mass ratio of MZ to AABB 3:2, AABB@MZ dosage 1–1.2 g/L, initial concentration of Lev-HCl <18 mg/L. Under these conditions, 72.09%∼ Lev-HCl could be degraded within 1.5 h. In addition, AABB@MZ could be easily recovered by gravity settling for 30 min and reused three times with 74.7% recovery rate. Photoluminescence (PL) combined with electron paramagnetic resonance (EPR) showed that photocatalysts mainly produced ·O 2 − and ·OH, which played a major role in the degradation process. Finally, a possible catalytic mechanism for AABB@MZ was suggested.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Wenjuan Zhang,Yuheng Li,Yaxian Wang,Youliang Wang,Miao Kou,Xiangyue Yang,Qianqian Chu,Kun Zhao
An efficient route is proposed to synthesize a novel three-dimensional (3D) magnetic MXene aerogel (3D MXene/Fe 3 O 4 ). 3D MXene were synthesized by self-assembly of 2D MXene Ti 3 C 2 T x using ethylenediamine (EDA) as crosslinking inducer, then Fe 3 O 4 was in situ coprecipitation onto 3D MXene. 3D MXene/Fe 3 O 4 was applied as an adsorbent for Ag(I) removal from aqueous solutions. 3D MXene/Fe 3 O 4 exhibits a cross-linked 3D porous network with magnetic Fe 3 O 4 nanoparticles uniformly dispersed on its surface and edges. The maximum adsorption capacity of 3D MXene/Fe 3 O 4 for Ag(I) was 2385 mg g −1 . The kinetics and isothermal process during adsorption were described accurately by the pseudo-second-order model and the Freundlich isotherm model, and the adsorption process was driven by chemisorption and multilayer adsorption, where the diffusion mechanism involved surface diffusion and intraparticle diffusion. Furthermore, the 3D MXene/Fe 3 O 4 are recyclable, retaining 71% of the initial removal rate after 5 adsorption/desorption cycles.
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PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2023
·Vol. 220
·期 17
·2300261
·
IF 2
Ting Li,Mengzhou Ma,Junhai Wang,Qiang Li,Yunwu Yu,Qianqian Zou,Xinran Li,Xiaoyi Wei,Tingting Yan,Yulan Tang
As an efficient, safe, and environmentally friendly technology, semiconductor photocatalysis has been widely used in the removal of antibiotics from wastewater. In this work, a novel Ag/BiOI/g-C 3 N 4 composite photocatalytic material, BiOI/g-C 3 N 4 , g-C 3 N 4 , and BiOI are prepared as the photocatalysts. The morphologies, chemical properties, and photocatalytic performances of the photocatalysts are characterized using scanning electron microscope, transmission electron microscope, X-ray diffraction, X-ray photoelectron spectroscopy, Fourier-transform infrared spectrometer, ultraviolet–visible spectroscopy (UV–Vis) diffuse reflectance spectra, and photoluminescence spectra. In addition, tetracycline hydrochloride (TC) and ceftiofur sodium aqueous solutions are used to simulate wastewater and the photocatalytic degradation performances of the photocatalysts are investigated and compared under visible light. Compared to g-C 3 N 4 , BiOI, and BiOI/g-C 3 N 4 , the Ag/BiOI/g-C 3 N 4 demonstrates superior performance, increasing the removal rates of TC and ceftiofur sodium to 85.6% and 90.2%, respectively. The photocatalytic mechanism of the Ag/BiOI/g-C 3 N 4 may involve the promotion of the visible light–harvesting ability and inhibition of the recombination of photogenerated electron/hole pairs. Furthermore, the primary active groups in the system are identified as superoxide radicals (·O 2 − ) and hydroxyl radicals (·OH). Herein, some valuable insights into the development of innovative photocatalytic materials are offered for the effective removal of antibiotics from water.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Zhili Li,Jiye Zhang,Pengfei Luo,Jiayi Chen,Bowen Huang,Yuzhe Sun,Jun Luo
Silver chalcogenides demonstrate great potential as flexible thermoelectric materials due to their excellent ductility and tunable electrical and thermal transport properties. In this work, we report that the amorphous/crystalline phase ratio and thermoelectric properties of the Ag2SxTe1–x (x = 0.55–0.75) samples can be modified by altering the S content. The room-temperature power factor of the Ag2S0.55Te0.45 sample is 4.9 μW cm–1 K–2, and a higher power factor can be achieved by decreasing the carrier concentration as predicted by the single parabolic band model. The addition of a small amount of excessive Te into Ag2S0.55Te0.45 (Ag2S0.55Te0.45+y) not only enhances the power factor by decreasing the carrier concentration but also reduces the total thermal conductivity due to decreased electronic thermal conductivity. Owing to the effectively optimized carrier concentration, the thermoelectric power factor and dimensionless figure of merit zT of the sample with y = 0.007 reaches, respectively, 6.2 μW cm–1 K–2 and 0.39, while the excellent plastic deformability is well maintained, demonstrating its promising potential as a flexible thermoelectric material at room temperature.
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高影响因子
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