Surfaces and Interfaces
·
2024
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IF 5.7
Huiyu Tian,Haifeng En,Bingwen Li,Jinxian Zhao
An efficient Cu@C/SiO 2 catalyst for the hydrogenation of dimethyl oxalate (DMO) to methyl glycolate (MG) was prepared by sorbitol-modified ammonia evaporation method followed by calcination in N 2 . The Cu@C/SiO 2 catalyst exhibited the superior catalytic activity and stability for DMO hydrogenation compared with the Cu/SiO 2 catalyst. The optimized Cu@C/SiO 2 –1/4 catalyst exhibited an MG yield of 63 % during 90 h long-term evaluation under temperature of 210 °C, pressure of 1.9 MPa, WHSV of 1.25 g DMO ·g Cu -1 ·h -1 and H 2 /DMO of 150. The characterization results indicated that Cu dispersion can be significantly enhanced by the addition of an appropriate amount of sorbitol and the surface Cu 0 and Cu + species were effectively regulated by the amount of sorbitol. The catalytic activity of Cu@C/SiO 2 was linearly dependent on specific area of Cu + species under the sufficient specific area of Cu° for H 2 dissociation. In addition, the sorbitol–derived carbon species on the catalyst were also favorable for the enhanced stability owing to the suppression of Cu sintering.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Haorong Sun,Hangxi Liu,Ming Fang,Zeyi Chen,Yifeng Zhang,Xiaoli Tan
Heavy metal pollution, particularly Pb 2+ , poses a severe threat to human survival and ecosystem health due to its detrimental effects on organisms. Therefore, evaluating the concentration of Pb 2+ in the environment can help mitigate these risks in advance. In this study, Cu nanoparticles (Cu NPs) modified 2D Cu-Metal-organic frameworks (Cu(NPs)/Cu-MOFs@ITO) are prepared and loaded onto indium tin oxide (ITO) glass by an electrophoretic method to produce an electrochemical sensor (ECS) for Pb 2+ . Cu(NPs)/Cu-MOF-B was synthesized by a simple solvothermal method and characterized by XRD, SEM, TEM , Raman, FT-IR and other methods to analyze the crystal structure, molecular structure and microstructure. The Cu NPs improve the electron transfer ability, and the abundant surface amino groups of Cu-MOF can be used to bind Pb 2+ characterized by CVs and EISs. The excellent energy positions of valence and conduction bands of Cu(NPs)/Cu-MOF facilitate the electron migration in oxidation and reduction of Pb 2+ analyzed by XPS, Mott-Schottky and UV–vis absorption curves. The limit of detection (LOD) reaches 0.065 μM and the sensitivity reaches 99.04 μA μM -1 cm -2 . The Cu(NPs)/Cu-MOFs@ITO ECS can be successfully applied to detect Pb 2+ in water environments with high sensitivity, selectivity and reproducibility, which provides a feasible method for detecting Pb 2+ .
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ACS Applied Electronic Materials
·
2025
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IF 4.7
Ke-Xin Chen,Rui-Chong Li,Li-Yin Gao,Zhi-Chao Meng,Chang Liu,Zhi-Quan Liu
The interfacial reactions between Cu and Sn at the nanoscale, which is critical to the development of microbump (μ-bump) technology, require further understanding. Constructing the nanoscale interface for observing the interfacial behavior during reactions is a challenge. This study investigates the interfacial reactions within Cu/Sn composite nanoarrays fabricated through template electrodeposition to explore the growth process of intermetallic compounds (IMCs). The results reveal that polycrystalline Cu/Sn composite nanoarrays were successfully electroplated with varying Sn fractions, which regulated the growth of IMCs. Additionally, both polycrystalline copper/IMC and nanotwinned copper (nt-Cu)/IMC nanowires were analyzed to explore the effect of the Cu microstructure on IMC growth. Finally, full-IMC nanowires were prepared via high-temperature storage, where twins may act as vacancy sinks at this condition, preventing the formation of voids, which should hold great significance for guiding the preparation of full-IMC μ-bumps in transient liquid-phase (TLP) bonding. This work provides deeper insights into solder joint interface changes in electronic devices during operation.
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高影响因子
ACS Applied Electronic Materials
·
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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高影响因子
RSC Advances
·
2025
·Vol. 15
·期 13
·9997
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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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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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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
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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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高影响因子
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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高影响因子
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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PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
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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高影响因子
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
·
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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高影响因子
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