JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Yu Xin,Haoyi Mou,Chang Miao,Shuqing Nie,Minyue Wen,Guowen He,Wei Xiao
The SnCu-SiO 2 @CNFs composite nanofibers are successfully fabricated by electrospinning and subsequent heat treatments, in which the Sn-Cu alloy particles are uniformly confined in carbon nanofibers (CNFs) in the presence of SiO 2 . The characterization results show that incorporating SiO 2 into the CNFs matrix can mitigate the problem of the phase separation between Sn-Cu alloy particles and CNFs and increase the fibrous structural integrity of the composite electrodes. Importantly, the SnCu-SiO 2 @CNFs-1.0 composite electrode displays the improved electrochemical performance when the amount of Cu(Ac) 2 is controlled at 1.0 mmol, in which the discharge specific capacity of the electrode not only delivers 501.8 mAh/g after 100 cycles at 100 mA/g, but also retains 467.4 mAh/g after rate cycles when the current density is abruptly recovered to 100 mA/g. Moreover, the SnCu-SiO 2 @CNFs-1.0 electrode can possess an enhanced Li + diffusion coefficient of approximately 1.58 × 10 −16 cm 2 s −1 and a high Warburg coefficient of 568.9 Ω cm 2 s −0.5 at room temperature. The enhanced electrochemical performance can be partly ascribed to the complete encapsulation of Sn-Cu alloy particles by the CNFs matrix, and partly to the promotion of the over-all electronic conductivity. Furthermore, the flexible and conductive CNFs matrix and the stable Cu 6 Sn 5 phase can conjoinedly accommodate the volume change of the electrodes during charge/discharge processes. Therefore, the facile strategy for encapsulating Sn-Cu alloy particles into CNFs may offer some a prospective instruction for the alloy anodes in the field of energy storage.
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Ruxia Song,Shihong Zhang,Yi He,Teng He,Hongjie Li,Bo Liu,Zhifei Zhang,Yahui He
A new type of Ni-Cu/Si 3 N 4 nanocomposites was prepared by pulse electrodeposition technology, which can be used for corrosion protection in seawater environment. XRD , SEM, AFM, EDS and XPS were used to study the structure, morphology, and surface composition of the deposited layers. The hardness and anti-corrosion performance of the deposits were evaluated using a microhardness tester and an electrochemical workstation. Meanwhile, the samples were characterized by EIS , SEM, EDS and XPS after immersion in simulated seawater for 7 days, 14 days, and 28 days. The results show that the average crystallite size of the nanocomposite with face-centered cubic structure is 13.2 nm, and has a dense granular nodular structure without obvious defects. EDS and XPS demonstrated the successful embedding of Si 3 N 4 nanoparticles with uniform distribution in the coating. Besides, it was found that embedding Si 3 N 4 particles in Ni-Cu alloy coatings can significantly strengthen the microhardness and anti-corrosion performance of the material. Furthermore, the Ni-Cu-Si 3 N 4 (0.7 g·L −1 ) nanocomposite exhibited excellent corrosion resistance even after immersion in simulated seawater medium for 28 days.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Fei Xu,Yexiang Cui,Di Bao,Dan Lin,Sicheng Yuan,Xiao Wang,Huaiyuan Wang,Yongli Sun
Effective heat removal through polymer composites has become a crucial issue in thermal management. Constructing a 3D interconnected filler network in polymer matrix is generally considered to be one of the most effective strategies for enhancing thermal conductivity of polymer-based composites. Herein, a unique 3D interconnected Cu network was successfully fabricated to enhance the thermal transfer properties of epoxy composites. We used Carbon felt (CFelt) as 3D skeleton to electroplate Cu on the CFelt surface for constructing the 3D Cu film network, which can serve as continuous heat conductive highways. The highly thermally conductive epoxy composites were then prepared by impregnating epoxy resin into the 3D Cu-plated CFelt (Cu-CFelt) network. Taking advantage of the 3D interconnected Cu heat transfer channel, an ultrahigh thermal conductivity of 30.69 W m −1 K −1 was achieved, which exhibited nearly 140 times higher than that of pure epoxy (0.22 W m −1 K −1 ) and 110 times higher than that of CFelt/epoxy composite (0.28 W m −1 K −1 ). And our composite exhibited outstanding thermal behaviors during heating and cooling processes. Additionally, the obtained composite maintained good mechanical properties and presented superior electrical conductivity of 7.49 × 10 4 S cm −1 . Our work reveals that the novel 3D Cu-CFelt/epoxy composites have strong application prospects in thermal management materials.
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高影响因子
DIAMOND AND RELATED MATERIALS
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2019
·
IF 2.29
Congyang Lu,Xiaomei Feng,Yifu Shen,Ye Tian,Jian Jiang,Linquan Hu
In this work, diamond/Cu-1Cr composite coatings were successfully prepared on T2 Cu substrate via mechanical milling method. The effects of high temperature annealing on the microstructure, wear resistance and thermal conductivity of coatings have been studied. The results showed that the diffusion ability of copper and chromium was enhanced to form segregation after annealing at 700 °C, while chromium carbides were formed on the surface of diamond. When the annealing temperature was higher than 800 °C, the loose lamellar structure was formed from the surface to the inside of the coating. The friction coefficient of the annealed coating at light load was lower than that of the unannealed coating, much lower than that of pure copper. The wear resistance of the unannealed coating was far superior to that of pure copper, but it decreased slightly after annealing. After annealing at 700 °C, the thermal conductivity of the coated sample was significantly improved to 346.91 W·m −1 ·K −1 . Increasing the annealing temperature would result in the deterioration of heat conduction.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Liqianyun Xu,Liuyang Zhang,Bei Cheng,Jiaguo Yu,Ahmed A. Al-Ghamdi,S. Wageh
Poor conductivity and rate capability are the obstacles faced by nickel-cobalt composites as electrode materials for supercapacitor application. Herein, simple electrochemical treatment conducted by cyclic voltammetry is applied and the overall performance of the active material is considerably enhanced. We discover that this treatment triggers the formation of Ni-Co-Cu ternary composite and optimizes the crystal structure of the untreated counterpart. The areal capacitance of the treated sample rockets up to 6.13 F cm −2 at 2 mA cm −2 , almost 13 times higher than the untreated ones. Besides, the resistance is substantially reduced by cyclic voltammetry treatment. Moreover, the Coulombic efficiency and stability are concurrently elevated. The reasons behind this treatment are mulled over and reasonable hypothesis is suggested. This study provides a cheap and effortless way to reform the structures of as-obtained samples as well as vigorously raise the performance of current available materials.
研究领域:
材料科学
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电化学
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纳米材料
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能源存储
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功能材料
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高影响因子
ACS Applied Materials & Interfaces
·
2017
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IF 7.504
Jinlian Bi,Jianping Ao,Qing Gao,Zhaojing Zhang,Guozhong Sun,Qing He,Zhiqiang Zhou,Yun Sun,Yi Zhang
Electrodepositon of Ga film is very challenging due to the high standard reduction potential (−0.53 V vs SHE for Ga3+). In this study, Ga film with compact structure was successfully deposited on the Mo/Cu/In substrate by the pulse current electrodeposition (PCE) method using GaCl3 aqueous solution. A high deposition rate of Ga3+ and H+ can be achieved by applying a large overpotential induced by high pulse current. In the meanwhile, the concentration polarization induced by cation depletion can be minimized by changing the pulse frequency and duty cycle. Uniform and smooth Ga film was fabricated at high deposition rate with pulse current density 125 mA/cm2, pulse frequency 5 Hz, and duty cycle 0.25. Ga film was then selenized together with electrodeposited Cu and In films to make a CIGSe absorber film for solar cells. The solar cell based on the Ga film presents conversion efficiency of 11.04%, fill factor of 63.40%, and Voc of 505 mV, which is much better than those based on the inhomogeneous and rough Ga film prepared by the DCE method, indicating the pulse current electrodeposition process is promising for the fabrication of CIGSe solar cell.
研究领域:
材料科学
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电化学
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光伏技术
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薄膜技术
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高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6
Mengxue Tang,Jiale Zhang,Qixuan Mu,Keyan Chen,Yibing Ji
Background Enantiomers may have differences in biological effects, pharmacological activity, and toxicity. Currently, global regulatory authorities are imposing increasingly stringent approval requirements for single-enantiomer drugs. Coupled with the continued growth of the chiral pharmaceutical market, this makes the development of chiral separation technology an urgent scientific task. Therefore, the separation and analysis of chiral drug enantiomers are directly related to human health. Enzyme-based chiral stationary phase (CSP) is a promising platform. Unfortunately, the fragility of natural enzymes, as well as the complexity and low efficiency of the preparation process, hinder their practical application in chiral separation. Results Metal organic frameworks (MOFs), which have enormous potential in the fields of enzyme immobilization and capillary electrochromatography (CEC) separation, were explored as support materials with good enzyme immobilization performance and CSP with separation abilities. Lipase (from porcine pancreatic) was encapsulated into a metal organic framework (MOF) under the concept of "in situ". Effective enzyme loading capacity enables composite materials (Lipase@HKUST-1) to inherit lipase's natural chiral recognition ability. On this basis, inspired by the same concept, Lipase@HKUST-1 was directly grown in the open column for capillary electrochromatography (CEC). By optimizing the interface combination method and simplifying the column preparation steps, the efficiency and performance of capillary column preparation have been effectively improved. Enantiomer separation of multi-chiral drugs such as naproxen and chlorpheniramine has been achieved. Theoretical calculations further explore potential chiral recognition mechanisms. Significance The effective combination of cost-effective lipase (from porcine pancreatic) and MOF materials enriches the library of chiral materials for enantioseparation. The understanding of the chiral recognition mechanism inspires the design of ideal performance materials. The highly stable MOF separation platform for biological functions has introduced a pioneering research paradigm for the CSP development of OT-CEC.
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 8.2
Yuan Ma,Yongli Li,Lan Jiang,Xin Kong,Xin You,Liang Liu,Rui Bao,Zhenhua Ge,Hao Cui,Feng Liu,Jianhong Yi
The energy-intensive Haber-Bosch process for ammonia synthesis necessitates sustainable alternatives, electrochemical nitrate reduction (eNO3RR) is emerging as a promising route to address nitrate pollution. However, it faces a critical bottleneck: the low ammonia selectivity arising from competitive hydrogen evolution. Herein, we introduce copper carbon dots-supported iron phthalocyanine (Cu-CDs/FePc) - a electrocatalyst featuring dynamic Cu–Fe dual sites that steer tandem e–/H+ delivery for efficient NH3 electrosynthesis. It achieves an outstanding ammonia yield of 17.69 mg h–1 mgcat.–1 with a remarkable Faradaic efficiency of 91.0% at −0.7 V vs RHE in acid conditions, which surpasses many reported transition metal-based electrocatalysts for eNO3RR. In-situ FTIR spectroscopy and density functional theory (DFT) calculations elucidate that dynamic Cu–Fe dual sites orchestrate directional electron–proton relay chains through electronic complementarity: Electron-deficient Cu2+ centers intensify NO3– adsorption/activation, while electron-enriched Fe2+ sites drive *NO2 protonation, and interfacial charge shuttling initiates valence oscillations (Cu+/Cu2+ and Fe2+/Fe3+) effectively lower rate-determining step energy barrier, thereby boosting ammonia selectively while simultaneously suppressing hydrogen evolution. Furthermore, the catalyst exhibits robust stability over 100 h and practical versatility in zinc-air battery systems. This work presents a rational design strategy for high-performance eNO3RR catalysts, offering a significant advance toward efficient green ammonia synthesis and environmental remediation.
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2026
·
IF 3.9
Fu Guoning,Peng Cheng,Wu Wei,Xiong Tianying,Lv Fanghui,Li Kuan,Liu Dong
Copper-based catalysts for Suzuki coupling reactions face limitations in efficiency and stability, while conventional palladium catalysts require high costs and harsh conditions. To address these challenges, we developed a bifunctional copper-loaded black phosphorus (Cu/BP) material. Initially, a series of Cu/BP catalysts (1–5 wt% Cu) were synthesized via wet chemical reduction. Subsequently, catalytic performance was evaluated using vector network analysis and a microwave catalysis system. Key results were obtained: Cu/BP-3 exhibited exceptional microwave absorption (minimum reflection loss: − 36.31 dB; effective bandwidth: 6.64 GHz). Under microwave heating (90 °C) with ultralow copper loading (0.25 mol%) in H 2 O/CH 3 OH (1:1 v/v), > 99.7% bromobenzene conversion was achieved within 2 h. This represents a 5.5-fold enhancement compared to conventional oil-bath heating. The catalyst maintained > 95% yields for bromobenzene substrates bearing strong electron-withdrawing/donating groups and ortho-substituents. Remarkably, > 95.4% activity retention was observed after 10 cycles, with copper leaching < 0.01 ppm. This work demonstrates that Cu/BP efficiently activates C–Br bonds through synergistic dielectric energy localization and interfacial charge transfer (P → Cu). It provides a new strategy for designing green, stable non-precious metal catalysts for microwave-driven reactions.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Hui-ting Hu,Xiao-mei Li,Wen-cai Jiang,Chen Ni,Yu-yang He,Guo-qi Zhang,Hao Yu,Zhi-Bo Hou
Per- and polyfluoroalkyl substances (PFAS) were a class of hazardous contaminants known for their high environmental persistence and toxicity. Due to their strong polarity, wide variety, and broad distribution, a rapid, accurate, and on-site detection method was urgently needed for future screening and emergency response. Herein, a dandelion-like Pd/Cu nanozyme with triple enzyme-like activities (oxidase-like, peroxidase-like, and laccase-like) was synthesized by one-step hydrothermal method. Different PFAS species inhibited these three enzyme-like activities to varying extents. By quantifying absorbance changes, distinct fingerprint patterns were constructed, and a three-channel colorimetric sensor array was developed. This array exhibited high selectivity and robust anti-interference capability for discriminating seven PFAS species. The LDA score plot revealed distinct clustering of different PFAS classes and complex mixtures, indicating clear separability among their fingerprints. The developed nanozyme sensor array was successfully applied to the detection of PFAS in environmental water (river, lake, and tap water). This work provided a novel strategy for selective and reliable detection of PFAS in complex environmental matrices.
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高影响因子
MOLECULES
·
2026
·Vol. 31
·期 15
·2573
·
IF 5.1
Shuzhen Guo,Shanshan Xu,Yuhao Ma
Carbon fiber (CF)-reinforced polyethylene (PE) composites have low density, outstanding corrosion resistance and good processability. These materials are widely promising for household appliances, automobiles and construction industries. Nevertheless, PE is a non-polar inert matrix with extremely low surface energy, leading to poor interfacial wettability and bonding force with CF. Interfacial debonding frequently occurs along with low load transfer efficiency, failing to meet the service requirements of high-performance structural components. In this study, CF was carboxylated with hydrogen peroxide, and Cu-BTC porous materials were in situ grown on the fiber surface to obtain modified CF (CF-Cu-BTC). The CF-Cu-BTC was then incorporated into a low-density polyethylene (LDPE) matrix. The MOF layer improves the interfacial compatibility and bonding force between the fibers and the matrix and enhances the overall mechanical properties and structural stability of the composites. The mechanical performance of CF composites is remarkably superior to that of pure LDPE. Compared with the pristine sample with a tensile strength of 11.04 MPa, the composite exhibits an enhanced tensile strength of 26.63 MPa, an increase of 141.20%. Scanning electron microscopy results confirm that no gaps exist between the CF and LDPE, verifying favorable interfacial compatibility. MOF-modified CF effectively improves the mechanical properties of resin-based composites. This study provides practical guidance for advanced composite applications.
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高影响因子
ACS Applied Energy Materials
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2026
·
IF 5.5
Wenbin Wang,Wei Yang,Xin Yu,Tao Long,Sha Deng,Yinying Zhu,Haodong Sun,Hongwu Zhang,Guanghao Zhou
Developing cost-effective electrocatalysts with accelerated kinetics is pivotal for sustainable hydrogen production via water electrolysis. In this study, we propose a quaternary deep eutectic solvent (DES) system to directly fabricate Co-Cu alloy nanosheets on a NiMo foam substrate via one-step electrodeposition. Comprehensive characterizations reveal that the catalyst undergoes a dynamic surface reconstruction during electrochemical activation, evolving from initial nanosheets into a hierarchical rod-shaped architecture. This process generates a synergistic crystalline/amorphous heterojunction composed of CoOOH and Cu(OH)2, which profoundly optimizes the electronic structure. Consequently, the activated Co-Cu/NiMo catalyst delivers superior oxygen evolution reaction performance, requiring a low overpotential of 241 mV to reach 10 mA cm−2. Microkinetic and practical evaluations further highlight an impressive turnover frequency of 27 s−1 at 250 mV and a near-quantitative Faradaic efficiency of 98.4%. These metrics confirm that the bimetallic synergy fundamentally accelerates the intrinsic per-site reaction kinetics and ensures highly selective charge utilization. Coupled with robust durability exceeding 60 h, this work validates the efficacy of quaternary DESs in materials synthesis and provides valuable insights into reconstruction-induced activity enhancements in transition metal alloys.
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