MICROCHEMICAL JOURNAL
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2026
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IF 5.1
Jinquan Liu,Siru Liu,Jiao Shi,Dongyun Xu,Guoqing Qin,Yuxiang Duan,Ruoxuan Chen,Xuan Wang,Yan Tan,Shengyuan Yang,Le Li
The development of reliable sensing platforms for the simultaneous detection of multiple heavy metal ions has remained challenging in environmental monitoring. Herein, a novel ratiometric electrochemical sensor was developed using a Cu-MOFs@MnO 2 NSs composite for the simultaneous quantification of Pb 2+ and Hg 2+ . The composite was synthesized through a facile approach and functionalized onto a screen-printed carbon electrode (SPCE) to establish an efficient sensing interface. This design capitalized on the synergistic properties of both components: MnO 2 nanosheets provided abundant surface hydroxyl groups and enhanced electrical conductivity, while Cu-MOFs contributed a large specific surface area with multiple binding sites for metal ion enrichment. Significantly, the incorporated Cu-MOFs functioned as an internal reference, delivering a stable built-in signal for ratiometric analysis. The developed sensor achieved impressive detection limits of 22.69 nmol/L for Pb 2+ and 30.07 nmol/L for Hg 2+ , while maintaining high selectivity and reproducibility in complex matrices. This study not only established a reliable platform for the accurate detection of Pb 2+ and Hg 2+ but also promoted the adoption of ratiometric strategies in electrochemical sensing to support environmental protection and public health security.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2020
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IF 3.807
Wanqi Zheng,Yanyan Liu,Peipei Yang,Yuyu Chen,Jia Tao,Jianqiang Hu,Peng Zhao
Diabetes is a metabolic disease characterized by hyperglycemia, which can only be controlled by treatment at present. In order to monitor the course of diabetes, it is significantly important to develop a sensor with superior sensitivity, which can detect the glucose accurately and rapidly. In this paper, the copper-based metal organic framework (Cu-MOF) was found to have a significant electrocatalytic effect on glucose, and the synergistic effect of nanocomposite of Cu-MOF and carbon nanohorns (CNHs) was utilized to construct an effective biosensing interface for the glucose. Under the optimal conditions, Cu-MOF/CNHs modified glass carbon electrode (GCE) showed favorable electrochemical properties toward glucose in the wide range from 250 nM to 1.2 mM with a limit of detection of 78 nM (S/N = 3). Meanwhile, the Cu-MOF/CNHs/GCE was applied for the blood glucose analysis and achieved comparable results with clinical method (hexokinase method). The determination of glucose in commercial pear juice also indicated its reliability and accuracy. The proposed strategy not only provided a sensitive detection method for glucose but also paved a new way for the application of metal organic framework .
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DOI
高影响因子
Science China-Materials
·
2026
·
IF 7.7
Guan Yongmao,Yang Liqing,Guo Chen,Chen Mingde,Chen Qinfang,Wang Pengfei
This work presents a cracked template and vacuum metal evaporation strategy for fabricating structurally randomized copper (Cu) mesh films. Regulating the internal stress distribution within the coating during template cracking enables the controlled fabrication of Cu mesh films with varying discrete degrees of mesh aperture area and distinct probability distributions of metal line inclination. The influence of structural parameter randomization within the Cu mesh films on properties has been systematically investigated, encompassing higher-order diffraction energy homogenization, optoelectronic performance, and electromagnetic interference shielding effectiveness (EMI SE ). Results demonstrate that increasing structural randomization effectively suppresses higher-order diffraction energy, achieving a reduction to −3.93 dB in normalized higher-order diffraction energy. Furthermore, the Cu mesh film exhibited minimal degradation on imaging system performance, with resolution decreasing only marginally from 80.6 to 71.8 lp/mm. Simultaneously, the most randomized Cu mesh film demonstrates an ultra-low sheet resistance (3.31 Ω/sq), high visible light transmittance (88.7% at 550 nm), an exceptional figure of merit (FoM=913.69), and robust EMI SE within the X-band (average SE of 33.18 dB). These findings underscore that metal mesh films incorporating structural randomization offer an effective strategy for enhancing EMI shielding in high-performance optoelectronic imaging systems.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121808
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IF 7.5
Shuyan Miao,Jing Zhou,Zhen Xu,Yuting Wang,Rui Liu,Tian Gan
This work presents a disposable, integrated three-electrode sensor fabricated on paper via vacuum filtration of single-walled carbon nanotubes for rapid and sensitive detection of phthalylsulfacetamide (PSA) in environmental water. To improve performance, the working electrode was functionalized with a two-dimensional copper-based catalyst synthesized by one-pot pyrolysis, which provides high electrocatalytic activity. A molecularly imprinted polymer (MIP) layer was then constructed on the electrode surface through a dual-functional monomer strategy, generating specific recognition cavities complementary to PSA. The synergistic integration of the catalytic Cu-based material and the selective MIP enabled rapid, accurate, and sensitive PSA detection. Experimental results show a broad linear detection range (10 nM to 60 μM), a low detection limit (3.86 nM), good reproducibility (RSD of 3.9 %), good long-term stability (RSD of 1.5 % over 30 days), and high anti-interference performance against structural sulfonamide analogues and common environmental contaminants. When applied to spiked environmental water samples, the method achieved a recovery rate of 95.2–106 %, demonstrating its feasibility for on-site antibiotic residue detection.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Ao Li,Luyao Sun,Suting Weng,Zhichen Liu,Qunhong Liu,Hongwei Zhang,Xiaojun Bao,Pei Yuan
Copper-based catalysts are widely studied for glycerol hydrogenolysis due to their high 1,2-propanediol (1,2-PDO) selectivity. However, their performance is fundamentally limited by the low hydrogenation activity of metal copper and the unbalanced distribution of acid-base sites. Herein, we designed a MgO-coordinated Cu x /Mg y -Al 2 O 3 catalyst through lattice-selective doping, where Mg 2+ incorporation generates interfacial Mg-O-Al acidic sites while surface MgO clusters provided tunable basicity. The optimized Cu 0.3 /Mg 0.1 -Al 2 O 3 catalyst achieves complete glycerol conversion with 94.2% 1,2-PDO selectivity at 250 °C/3.5 MPa H 2 , surpassing conventional Cu-based catalysts. Through In-situ diffuse reflectance infrared Fourier transformations spectroscopy (DRIFTS) analysis combined with CO 2 /NH 3 -TPD measurements reveal that Mg doping stabilizes metastable Cu + species and establishes an adjustable acid-base distribution, crucial for selective C O cleavage. Mechanistic analysis identifies a sequential dehydration-hydrogenation pathway, where the synergistic interaction between Cu + active centers and precisely tuned acid-base dual sites promotes intermediate transformation kinetics, and effectively suppresses undesired side reactions through spatial confinement effects. This work establishes a design principle for multifunctional catalysts in biomass upgrading.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
·
IF 4.598
Chenhao Cao,Tianci Yan,Jingtian Tong,Junfei Duan,Piao Liu,Chenqian Bie,Guang Zeng,Zhaoyong Chen
Tin-based anode materials have emerged as a promising candidate for lithium-ion batteries due to its inexpensive cost and high theoretical specific capacity, whereas its potential application is limited by severe capacity attenuation and inferior cycling stability due to the huge volume fluctuation during lithiation/delithiation. Herein, SnO 2 /Cu@Carbon composite was fabricated to overcome this problem through a facile co-precipitation approach followed by carbon coating. In the as-prepared composite, SnO 2 and Cu particles are uniformly embedded in N -doped carbon network matrix. Such unique sandwich-like product can greatly alleviate the large volume expansion and SnO 2 aggregation that is conducive to the electron/ion migration, and significantly improve cycling permanence. Therefore, the optimized sample shows impressive long-term stability even at high current density of 1.0 A g −1 (348 mAh g −1 after 1000 loops without obvious capacity decay). Moreover, a comprehensive dynamic analysis of the lithium storage was performed, implying that the increased Li + diffusion coefficient and pseudocapacitive contribution after cycling may account for the improved electrochemical performances.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 39
·18926-18937
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IF 3.925
Hua He,Zhiguang Guo
Superhydrophobic conductive materials have attracted much attention because of their wide applications in oil–water separation, electromagnetic shielding, and human motion detection. Herein, we adopt a facile method to prepare a superhydrophobic conductive fabric. In brief, the composite fabric is composed of a cheap and elastic textile base, an interface layer polydopamine (PDA), functional layer aligned carbon nanotubes (ACNTs) and Cu nanoparticles, and low surface energy materials such as polydimethylsiloxane (PDMS). In this method, we encapsulate Cu nanoparticles on the surface of ACNTs, which improves the electrical conductivity of the fabric. PDMS could not only protect the indicated Cu nanoparticles from oxidation but also endow the fabric with superhydrophobicity and thus corrosion resistance. The results show that the PDA/ACNTs/Cu/PDMS fabric can maintain good electrical conductivity and excellent chemical stability and mechanical durability even after bending (500 times), solution immersion, and water washing. Furthermore, the combination of superhydrophobicity and electrical conductivity endows the PDA/ACNTs/Cu/PDMS fabric with an excellent electrocaloric effect and deicing performance. More interestingly, the prepared fabric can also be used to monitor human movements. This superhydrophobic conductive fabric has potential application prospects as waterproof materials, wearable electronics, heaters, and in other fields.
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高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Zhuo Xing,Juhai Weng,Chi Ma
A series of Zn 2- x Cu x GeO 4 ceramics were prepared by the solid-phase sintering method. Cu 2+ substitution for Zn 2+ facilitated the single-phase formation and benefited densification via lowering the sintering temperatures , hence thereby the microwave dielectric properties were largely improved. A representative composition with x = 0.08 revealed a homogenous Zn 2 GeO 4 phase with good microwave dielectric properties: ε r ∼ 7.47, Q × f ∼ 56,980 GHz, and τ f ∼ −13.9 ppm/°C when sintered at 1000 °C. To evaluate the potential application of low-temperature cofired ceramics (LTCC), sintering aids (B 2 O 3 ) were added to the x = 0.08 sample to reduce its sintering temperature to below 960 °C. A dramatic improvement in Q × f ∼ 107,415 GHz was observed with only 0.5 wt % B 2 O 3 addition. Chemical compatibility was confirmed via cofiring with silver electrodes at 940 °C. All the merits show promising potential for advanced substrates.
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高影响因子
ENERGY & FUELS
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2022
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IF 4.654
Xuesong Shan,Keru Song,Fengyue Shi,Dongyu Zhao
Copper nanoparticles are uniformly supported on acidified carbon nanotubes (CNTs/Cu NPs) by a mild liquid-phase reduction method without surfactants or bridging molecules. The surface of copper nanoparticles is smooth without impurities. Then, polystyrene (PS) microspheres are prepared by emulsion polymerization and composited with CNTs/Cu NPs (CNTs/Cu NPs/PS). Nanocopper/carbon nanotubes as the core and polyaniline as the shell were prepared via situ polymerization as a core–shell structure (PANI@CNTs/Cu NPs/PS). At a high temperature, the PS cracks and eliminates materials, forming porous structures, and the polyaniline is carbonized, realizing nitrogen doping of the material (NCMP). The results indicated that the acidified carbon nanotubes played a crucial role in the synthesis procedure, achieving consistent growth of copper on carbon nanotubes. The size of evenly dispersed copper nanoparticles is about 5–15 nm. When NCMP is applied as an electrode material, it demonstrates excellent electrochemical performance as a high-performance supercapacitor.
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高影响因子
FUEL
·
2022
·
IF 8.035
Chaohe Zheng,Mingze Su,Haibo Zhao
As the kinetic influencing factors were not considered properly in the previous studies, the obtained activation energies of copper oxidation were discrepantly ranging from 15.0 kJ/mol to 100.0 kJ/mol. The gas diffusion in the crucible and sample layer, the surface reaction and the defect diffusion of copper cations all have an impact on the conversion process of copper oxidation samples. Using the high diameter-height ratio crucible in our self-made TGA could effectively eliminate the gas diffusion in the crucible and reduce the error of the kinetic tests. Based on the previous four-step oxidation mechanism, the kinetic parameters of copper oxidation are identified using a grain-scale kinetic model, coupling with a defect transport model. The potential kinetic impact factors including the particle polydispersity, gas diffusion, defect diffusion, surface reaction and particle sintering are adequately considered in this work. First, it is found that the copper oxidation is not dominated by the defect diffusion in the solid product layer, but governed by the surface reaction in the gas–solid interface. The copper oxidation is likely to be adsorption-limited during the surface reaction in the gas–solid interface, and the intrinsic activation energy is identified as 48.0 kJ/mol. The particle-scale model is then performed to investigate the impact of physical properties of oxygen carrier particles. It can significantly accelerate the conversion rate of copper oxidation by means of decreasing the particle size and increasing the porosity. However, it is not advisable to decrease the grain size too much when preparing the oxygen carriers, for this will only increase diffusion resistance inside the particle for small grain. Finally, it can be found that in most conditions of the air reactor, Cu-based oxygen carrier with the grain size of 220–300 nm exhibits the best oxidation performance.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Nan Xin,Guihua Tang,Tian Lan,Yifei Li,Jiawei Kou,Min Zhang,Xin Zhao,Yinan Nie
Two-dimensional (2D) layered transitional metal dichalcogenides (TMDCs) semiconductors like MoS 2 have been predicted to be promising thermoelectric (TE) materials due to their high carrier mobility. However, the TE performance of MoS 2 film is severely hindered by the high in-plane thermal conductivity. In this work, based on reversing grain orientation reducing in-plane thermal conductivity, Cu doping is used to increase the carrier concentration for optimization of electrical properties. The Cu-doped MoS 2 films have prepared by magnetron sputtering (MS) combined with post-sulfurization chemical vapor deposition (CVD). The composition, structure, thermal and electrical properties were systematically investigated by experiment and DFT calculation. Results indicate that Cu doping may slightly reduce the Seebeck coefficient of MoS 2 film, but effectively narrow the band gap and improve the carrier concentration, thus improving the electrical performance. In addition, MS combined with CVD method can effectively increase the degree of grain misorientation, making the in-plane thermal conductivity of Cu-doped MoS 2 film much lower. Combined with the above optimization, a promising maximum ZT value among TMDCs 0.137 at 425 K was obtained in Cu 6 -MoS 2 film. This study provides a new strategy to synchronously regulate the thermal and electrical properties of TMDCs films to improve their thermoelectric performances.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yaru Xi,Zuoyi Xiao,Hui Lv,Haodong Sun,Shangru Zhai,Qingda An
Copper oxide (CuO) and copper (Cu) have been viewed as the prospective pseudocapacitive electrode materials for supercapacitors. Nevertheless, the poor electron transfer capacity, loading amount, and cycling stability limit their wide applications, which can be addressed by developing the CuO based heterojunction on conductive carbons. Here, a CuO/Cu@C comprising CuO/Cu nanoflowers and chitosan-derived N -doped porous carbon was compounded by simple mechanical mixing, freeze-drying, and carbonization. The composite heated at 700 °C exhibited a high specific capacitance of 2479F/g at 0.5 A/g and excellent cycling stability with capacitance retention of 82.43 % after 10 000 charge–discharge cycles. In addition, the asymmetric supercapacitor (ASC), i.e., CuO/Cu@C-700//AC assembled by CuO/Cu@C (as a positive electrode) and activated carbon (AC, as a negative electrode) displayed a great energy density of 76.87 W h kg −1 at 374.5 W kg −1 and kept as high as 25.83 W h kg −1 even at 14998 W kg −1 . Our work provides a new pathway to preparing transition metal oxide-based electrode materials with distinguished electrochemical performances.
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PubMed
高影响因子
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