Surfaces and Interfaces
·
2024
·
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.
✓ 已验证
产品关联
DOI
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+ .
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2025
·
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.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2025
·
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.
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2015
·Vol. 6
·期 9
·3027-3037
·
IF 5.426
Yanan Liu,Yufei He,Daran Zhou,Junting Feng,Dianqing Li
Aiming at the preparation of catalysts with well-controlled structures, bimetallic PdCu catalysts containing only small amounts of Pd were prepared by two different methods for partial hydrogenation of acetylene. The highly dispersed and stable PdCu catalyst with the Pd : Cu atomic ratio of 1 : 40 was obtained from a Pd(OH)2/CuMgAl hydrotalcite (HT) precursor by a modified co-precipitation method. The obtained PdCu catalyst possessed uniform PdCu nanoalloys with an average size of 1.8 ± 0.3 nm. As a comparison, the impregnation method was also employed to prepare bimetallic PdCu catalysts and it was confirmed that the Pd-rich(core)–Cu-rich(shell) structure was dominant. Under identical reaction conditions, approximately 100% conversion and 82% selectivity at 100 °C were achieved using the PdCu nanoalloy catalyst which were 23% and 12% higher than those of the Pd-rich(core)–Cu-rich(shell) catalyst. The preferable activity was ascribed to the homogeneous nanoalloy structure and small size effect. The enhanced selectivity was attributed to the strong synergistic effect of PdCu. More significantly, this superior catalytic performance can be retained after 48 h of continuous reaction due to the excellent resistibility against carbon deposition and the confinement effect.
✓ 已验证
DOI
高影响因子
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.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
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.
✓ 已验证
产品关联
DOI
高影响因子
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.
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2025
·
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.
✓ 已验证
产品关联
DOI
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).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 19
·8930-8939
·
IF 9.931
Yu-Xia Li,Shuai-Shuai Li,Ding-Ming Xue,Xiao-Qin Liu,Meng-Meng Jin,Lin-Bing Sun
Cu(I)-containing materials have great potential in various applications such as in CO adsorption; however, development of an efficient and controllable method to produce Cu(I) sites remains a significant challenge; herein, a two-step double-solvent (DS) strategy is reported for the first time to fabricate Cu(I) sites in a representative metal–organic framework, MIL-101(Cr); this strategy ensures that both introduction of the Cu(II) precursor and its reduction to Cu(I) occur inside the pores and significantly minimizes the aggregation of Cu species. This is difficult to realize through conventional methods used for Cu(II) introduction (wet impregnation) or reduction (liquid-phase reduction). The two-step DS strategy involves selective reduction of Cu(II) to form Cu(I) without the formation of any Cu(0). The obtained Cu(I)-containing materials exhibit an excellent CO adsorption capacity (up to 2.42 mmol g−1) at 298 K and 1 bar, much better than that of the benchmark adsorbents including CuCl/γ-Al2O3 (1.0 mmol g−1), CuCl/MCM-41 (0.57 mmol g−1), and CuZSM-5 (0.11 mmol g−1).
✓ 已验证
DOI
高影响因子
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.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）