ACS Applied Electronic Materials
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2025
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IF 4.7
Shikun Zhang,Jun Qian,Yu Qi Jun,Jia-Qi Bai,Jingshuai Chen,Mingyuan Wu,Song Sun,Chang-Jie Mao
Polymer-based thermally conductive films face significant challenges related to interfacial thermal resistance, especially when required to deliver both efficient heat dissipation and electromagnetic interference (EMI) shielding in advanced electronic applications. In this study, we present a multifunctional composite system by incorporating copper-decorated hydroxylated graphene (Cu-GOH) and MXene (Ti3C2TX) into a poly(vinylidene fluoride) (PVDF) matrix. The hybrid filler network is engineered through dual interfacial interactions: Cu···π bonding with the graphene framework and Cu–O coordination with the MXene surface, establishing continuous thermal and electrical transport pathways. At an optimized filler loading (22.5 wt % Cu-GOH and 2.5 wt % MXene), the composite achieves: (i) a through-plane thermal conductivity of 3.64 W·m–1·K–1, representing a 19.22-fold enhancement over pristine PVDF; (ii) an in-plane electrical conductivity of 6.44 × 10–4 S·cm–1; and (iii) robust X-band EMI shielding effectiveness (≥25 dB across 8–12 GHz), exceeding military-grade requirements. Additionally, the hierarchically organized filler architecture enhances mechanical integrity, addressing the common trade-offs between functionality and durability in polymer composites. These findings demonstrate the potential of Cu-GOH/MXene/PVDF composites for integration into high-performance thermal management and EMI shielding components in aerospace systems, satellite communications, and next-generation renewable energy technologies.
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RSC Advances
·
2025
·Vol. 15
·期 13
·9997
·
IF 4.6
Zhendong Fu,Jiahe Qiu,Ping Gong,Danhong Zhang,Liping Wang
The precise and sensitive quantification of total antioxidant capacity (TAC) is indispensable for evaluating the quality of foods rich in antioxidants. In this investigation, a novel nanozyme exhibiting robust oxidase activity was synthesized via a sonochemical doping process utilizing copper ions and the modification of 2-propylimidazole onto nanoceria. Subsequently, a CeO2@Cu-PrIm/ox-TMB assay system was successfully formulated, furnishing a practical and highly sensitive analytical tool for TAC determination. The colorimetric sensor exhibited a linear response over a concentration range of 1 μM to 70 μM, accompanied by a limit of detection (LOD) of 1.26 μM under meticulously screened conditions. This assay displayed substantial practical utility for TAC analysis in fruits, attributed to its exceptional accuracy and selectivity. This research endeavor may offer a novel direction for the design of nanozymes and colorimetric biosensors possessing heightened oxidase activity, thereby advancing the field of analytical chemistry and food science. Schematic depicting the reaction system of CeO2@Cu-PrIm/ox-TMB assay for the determination of TAC.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Mingxian Duan,Yeshuang Wang,Huiling Fan,Zhelin Su,Chao Yang,Jiawei Kou,Ju Shangguan
Thiophene (C 4 H 4 S) removal from coke oven gas is critical to its subsequent high valuable utilization but remains a challenge. MOF-199 was considered as a promising candidate for C 4 H 4 S adsorption removal owing to its nature of enriched opened Cu sites. However, the presence of mixed valence of Cu(II) and Cu(I) in MOF-199 makes it puzzling to their respective contribution to the removal of C 4 H 4 S. Herein, a series of MOF-199 with different Cu(I) contents were synthesized using different methods, including hydrothermal, solution diffusion, and ultrasonic, and their C 4 H 4 S adsorption performance were investigated. The respective contributions of Cu(II) and Cu(I) to the C 4 H 4 S removal was systematically discussed. The collected results indicated that although the samples prepared with different methods present a remarkable difference in textural characters, the latter was found to have a negligible influence on the C 4 H 4 S removal owing to MOF-199(H) affording an inferior surface area and pore volumes but performing the best C 4 H 4 S removal capacity of 53.7 mg S/g. The co-adsorption results of CH 3 SCH 3 and C 4 H 4 S indicated that the excellent performance of MOF-199(H) mainly attributed to the presence of Cu(I), which provides active sites for C 4 H 4 S adsorption through π complex coordination. Cu(II) species was also found to the C 4 H 4 S adsorption via soft-acid-base coordinated interaction, but its contribution is 8.3 mg S/g, only accounting for 15.5 %. Additionally, the adsorption of C 4 H 4 S on MOF-199(H) was found to follow the intra-particle diffusion model and the Langmuir models. Moreover, MOF-199(H) also exhibited an excellent regeneration performance due to the weak interaction between C 4 H 4 S and their opened Cu sites, the C 4 H 4 S adsorption capacity still reaches 50.6 mg S/g after three regeneration cycles, about 94 % of its initial value. The results collected in this study will provide new insights for the manipulation of performance of C 4 H 4 S adsorption on the MOF-199.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Bin Zhang,Ziwen Han,Yanjun Xin,Yanjie Zhang,Wenqian Li,Boda Li,An Ding,Jun Ma,Xu He
Herein, vacuum ultraviolet (VUV) was introduced to enhance the activation rate of peroxymonosulfate (PMS) by copper ions for the first time. Compared with ultraviolet (UV), the redox cycle rate of Cu(II)/Cu(I) was prominently enhanced by VUV due to the combined driving effect of UV, hydrated electron and active hydrogen atoms. The accelerated Cu(II)/Cu(I) cycle in VUV/PMS/Cu(II) system led to 2.89 times higher degradation efficiency of 2,4-dichlorophenol (2,4-DCP) than that by UV/PMS/Cu(II) system. More importantly, the initial Cu(II) concentration (5 μM) in VUV/PMS/Cu(II) system was only 1/5 of the guideline value in WHO standards for drinking water, and the initial PMS concentration was also 1 order of magnitude lower than that in most PMS based systems for water treatment. Furthermore, the reaction mechanism and possible degradation pathways of 2,4-DCP were also proposed. This study verified the possibility for the utilization of trace Cu(II) in water to decompose refractory micro-pollutants by PMS activation.
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ACS Catalysis
·
2025
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IF 13.1
Yuan Li,Ruizhe Li,Pingping Rui,Jingwen Cheng,Yunxiang Li,Hong Yuan,Shuxin Ouyang
Fischer–Tropsch synthesis (FTS) offers a route for converting syngas from nonpetroleum resources into valuable chemicals, such as light olefins. χ-iron carbide (χ-Fe5C2), the key active phase for olefin production, is plagued by poor stability under practical conditions. Here, we propose a synthesis-to-catalysis full-process Cu-assisted strategy that integrates synthesis, photothermal conversion and reaction regulation into a design framework, thereby enabling a Cu/Fe5C2@C catalyst with improved durability and catalytic performance. The optimized 0.20Cu/Fe5C2@C catalyst achieves 48.7% light olefins selectivity, a 3.1-fold increase in light olefin yield compared to Fe5C2@C, and markedly improved long-term stability under photothermocatalytic FTS. Mechanistic studies reveal that the full-process synergy of Cu enhances catalytic performance by promoting the formation of a highly graphitized carbon shell to stabilize χ-Fe5C2 during synthesis, enhancing photothermal conversion efficiency via localized surface plasmon resonance, and optimizing reactant activation and the CH2* intermediate transformation toward light olefins. This work establishes a full-process regulation paradigm that integrates multistage functions, offering a transformative approach toward high-performance, durable solar-driven FTS for nonpetroleum resource utilization.
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ACS Omega
·
2025
·
IF 4.3
Dongpeng Sun,Shumei Kang,Jinghao Li,Hong Chen,Xintong Li,Hongyan Qi
Copper-based metal–organic frameworks (Cu-MOFs) show great promise in corrosion protection due to their large specific surface area and inherent antibacterial properties. However, when applied to epoxy resin (EP) coatings, their tendency to agglomerate and the instability of the passive films formed during corrosion compromise the anticorrosion performance of the composite materials. To overcome these challenges, this study synthesized a series of zinc–copper bimetallic MOFs (Zn/Cu-MOFs) by incorporating zinc ions with similar ionic radii during the synthesis process. The surface morphology and ion release characteristics of the Zn/Cu-MOFs were comprehensively characterized using FE-SEM, XRD, FTIR, XPS, and ICP-OES. Subsequently, taking Zn10/Cu-MOF (fabricated with a Zn2+-to-Cu2+ volume ratio of 1:9) as an example, the anticorrosion performance of the nanoparticles was assessed in both solution and coating systems. Remarkably, Zn10/Cu-MOF nanoparticles achieved a corrosion inhibition efficiency of 89.7% for carbon steel after 24 h of immersion. Furthermore, electrochemical impedance spectroscopy (EIS) and salt spray tests on the coatings demonstrated that Zn10/Cu-MOFs impart efficient corrosion resistance and self-healing ability to the EP matrix. After 40 days of immersion in 3.5 wt % NaCl solution, the Zn10/Cu-MOF@EP coating exhibited a significantly higher low-frequency impedance modulus (|Z|0.01 Hz ≈ 108 Ω·cm2) compared to Cu-MOF@EP (∼106 Ω·cm2) and pure EP (∼105 Ω·cm2).
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2018
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IF 3.441
Pingfang Yan,Maoyou Ye,Zhijie Guan,Shuiyu Sun,Yanping Guo,Jingyong Liu
As an efficient metal-trapping agent, conventional dithiocarbamate is prone to poor flocculation, and difficult recovery, and it is challenging to reuse it in applications. In our study, to address these problems, a novel and efficient chelating agent was developed in the form of a magnetic dithiocarbamate chelating resin. This resin was used to adsorb EDTA-Cu from wastewater. Furthermore, the Cu absorption mechanism of the new resin was investigated. The magnetic dithiocarbamate chelating resin is a composite polymer material with dithiocarbamate functional groups and a good magnetic response. The resin showed a high Cu removal efficiency of 99.19%, and an improved sedimentation performance. Moreover, the resin can be effectively recycled, and it was reused twice after desorption with 4% thiourea, it retained an absorption rate of 89.95%. The adsorption mechanism was based on chemical adsorption. The sulfur atoms of the resin had coordinated with the Cu of EDTA-Cu and formed a stable coordination compound. This research of the resin not only enriches the metal-trapping agent, but also provides a new idea for treating low concentration complex metal pollutants.
研究领域:
环境科学
·
材料科学
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FUEL
·
2020
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IF 5.578
Rong Dai,Ziliang Zheng,Kai Shi,Xu Wu,Xia An,Xianmei Xie
Ethanol steam reforming (ESR) has drawn great attention for sustainable H 2 production. Design active and sinter resistant nanocatalysts are critical issues for ESR reaction. Herein, a core–shell structured Pt-Cu@Ni-SiO 2 nanocomposite for ESR reaction has been synthesized via a one-pot facile encapsulation strategy, which is featured by highly active and sintering resistance for ESR reaction. Structural and morphological characterizations revealed that each Pt-Cu@Ni-SiO 2 nanocomposite contained a 3 nm Pt-Cu core and multiple Ni nanoparticles with diameters of around 3 nm anchored on the SiO 2 shell. The Pt-Cu@Ni-SiO 2 nanoreactor exhibited higher ethanol conversion (99.99%) and H 2 selectivity (70.32%) and an excellent stability with no loss of activity after 50 h of reaction at 450 °C. The advantages were originated from the ultra-small size of metal nanoparticles and the unique core–shell structure provides a great opportunity to give full play to the catalytic activity of active sites thus guaranteed excellent catalytic activity. Compared with the supported Pt-Cu@Ni-SiO 2 catalyst, the Pt-Cu@Ni-SiO 2 nanoreactor exhibit good stability and sintering resistance due to the encapsulation of the metal nanoparticles and the enhanced metal-support interaction. Thus, it is supposed that this type of catalyst opens a new strategy for the design of the ESR catalyst.
研究领域:
化学工程
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材料科学
·
催化反应
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高影响因子
Water
·
2021
·Vol. 13
·期 13
·1732
·
IF 3.103
Yuanyuan Yu,Yongjun Sun,Jun Zhou,Aowen Chen,Kinjal J. Shah
In this study, a high-efficiency magnetic heavy metal flocculant MF@AA was prepared based on carboxymethyl chitosan and magnetic Fe3O4. It was characterized by SEM, FTIR, XPS, XRD and VSM, and the Cu(II) removal rate was used as the evaluation basis for the preparation process. The effects of AMPS content, total monomer concentration, photoinitiator concentration and reaction time on the performance of MF@AA flocculation to remove Cu(II) were studied. The characterization results show that MF@AA has been successfully prepared and exhibits good magnetic induction characteristics. The synthesis results show that under the conditions of 10% AMPS content, 35% total monomer concentration, 0.04% photoinitiator concentration, and 1.5 h reaction time, the best yield of MF@AA is 77.69%. The best removal rate is 87.65%. In addition, the response surface optimization of the synthesis process of MF@AA was performed. The optimal synthesis ratio was finally determined as iron content 6.5%, CMFS: 29.5%, AM: 53.9%, AMPS: 10.1%. High-efficiency magnetic heavy metal flocculant MF@AA shows excellent flocculation performance in removing Cu(II). This research provides guidance and ideas for the development of efficient and low-cost flocculation technology to remove Cu(II) in wastewater.
研究领域:
环境科学
·
材料科学
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2026
·
IF 9.2
Maolin Wang,Haoyang Fu,Yanchun Fan,Gang Zhao,Tianwen Liu,Yi Liu,Qingqing Wu,Ying Huang
Persulfate (PS)-based advanced oxidation of polycyclic aromatic hydrocarbons (PAHs) in carbonate-rich water is severely constrained by radical scavenging and surface passivation of iron-based activators. Here, a dithionite–zerovalent iron–copper (DTN–ZVI–Cu) ternary system was developed to promote persulfate activation toward predominantly non-radical oxidation under bicarbonate-rich conditions. DTN and ZVI accelerated Cu(II)-to-Cu(I) reduction while simultaneously regenerating the ZVI surface, thereby sustaining Cu-centered redox turnover and facilitating the formation of Cu(III)-like oxidizing species. In parallel, DTN promoted sulfur-centered conversion pathways that favored 1 O 2 generation. These non-radical oxidizing pathways are generally less susceptible to inorganic-anion scavenging than conventional sulfate and hydroxyl radicals. Under standard conditions, the system achieved 91% acenaphthene removal within 60 min ( k obs = 0.039 min −1 ), an 8.7-fold kinetic enhancement over ZVI/PS alone. Moderate bicarbonate further promoted degradation, with k obs reaching 0.13 min −1 at 250 mg/L HCO 3 − , which is consistent with a plausible role of copper–carbonate complexation in stabilizing Cu redox cycling and favoring non-radical oxidation pathways. XPS analysis suggested that DTN–ZVI coupling elevated the reactive copper pool (Cu(I) + Cu(III)) to 57% of total surface copper. Applied to synthetic wastewaters, the system maintained 90–96% PAH removal at optimal dosages, indicating strong performance across complex saline matrices. This work demonstrates the feasibility of using coexisting Cu(II) as a catalytic resource for non-radical persulfate activation in carbonate-rich water.
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高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Xingjia Liu,Ziyang Liu,Kai Zhou,Chenyong Wang,Suyuan Liu,Xue-Zhi Song,Xiaofeng Wang,Zhenquan Tan
The electrochemical nitrate reduction reaction (NO 3 RR) offers a sustainable route for ammonia synthesis and wastewater remediation, yet developing efficient and stable electrocatalysts remains challenging. Herein, we report a high-performance heterostructured electrocatalyst, Cu-Cu 2 O@C-350, derived from controlled pyrolysis of a Cu-BTC metal-organic framework. Calcination at 350 °C transforms the precursor into a three-dimensionally interconnected coral-like carbon architecture embedded with Cu/Cu 2 O heterojunctions, exposing abundant active sites and facilitating mass transport. The optimal catalyst exhibits exceptional NO 3 RR performance, achieving a high ammonia yield of 46.63 mg h −1 mg cat −1 and a Faradaic efficiency of 98.43% at −0.7 V vs. RHE. In situ Raman spectroscopy reveals the synergistic mechanism that metallic Cu sites initiate nitrate reduction to nitrite, while Cu + sites facilitate deep hydrogenation of nitrite to ammonia. Density functional theory calculations demonstrate that the built-in electric field at the Cu-Cu 2 O interface induces directional electron transfer from Cu to Cu 2 O, optimizing intermediate adsorption and lowering the kinetic barrier. Finally, a rechargeable Zn-NO 3 battery with Cu-Cu 2 O@C-350 as the cathode delivers a peak power density of 2.07 mW cm −2 , highlighting its potential for practical energy conversion. This work provides valuable insights into the rational design of MOF-derived heterostructured electrocatalysts for efficient electrocatalytic reactions.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Wei Feng,Jian Zhang,Yong Xiao,Peng Cao,Guoqiang Luo,Qiang Shen
Active metal brazing of Si 3 N 4 /Cu joints typically forms a rigid TiN/Ti 5 Si 3 interface that suffers from significant thermal mismatch. This study demonstrates an alternative strategy for engineering the interfacial reaction pathway using a (Cu20Sn) 100-x Ti x filler. A distinct Cu 2 Ti 4 O interfacial layer formed through oxygen participation in the interfacial reaction during brazing. Thermodynamic analysis reveals that the Ti-O reactions possess a significantly greater driving force than conventional Ti-N and Ti-Si reactions. The resulting Cu 2 Ti 4 O phase establishes a beneficial coefficient of thermal expansion (CTE) gradient across the joint, thereby effectively mitigating interfacial thermal stress. Joint brazed with 5 wt% Ti achieved the highest shear strength of 137.3 MPa, which is attributed to the optimized morphology of a discontinuous Cu 2 Ti 4 O layer and the reduced brittle CuSn 3 Ti 5 precipitation. These results demonstrate a new approach for interfacial engineering of non-oxide ceramic joints, confirming that trace oxygen can act as an effective microstructural modifier.
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