ANALYST
·
2025
·
IF 3.3
Chenyao Lin,Qiaoping Wu,Menglu Mao,Xuedan Qiu,Chuanfan Ding,Yinghua Yan,Dumei Ma,Qingcao Li
The global rise of carbapenemase-producing Klebsiella pneumoniae (CPKP) poses a major threat to public health due to its high morbidity and mortality rates, driven largely by the production of carbapenemase enzymes. Rapid and accurate detection of carbapenemase activity is crucial for guiding appropriate antimicrobial therapy and controlling nosocomial transmission. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) enables direct detection of carbapenem hydrolysis but is currently limited by the drawbacks of conventional organic matrices, such as high background interference, toxic solvents, and poor reproducibility. In this study, we report a novel nanocomposite matrix, GNP@Zn–Cu/MOF@Au, synthesized via a green, aqueous-phase method without toxic reagents or extreme conditions. This heterostructured material exhibited a large mesoporous surface area, excellent UV absorption, and thermal responsiveness, which enhanced signal intensity, reproducibility, and analytical sensitivity, significantly improving MALDI-TOF MS performance. When applied to the identification of carbapenemase activity in clinical CPKP isolates, the matrix achieved 100% sensitivity and specificity after 1 hour of incubation and 97.3% sensitivity after just 15 minutes. Notably, KPC-2-producing strains were detected with full sensitivity within 15 minutes, while extended incubation enabled reliable identification of low-activity enzymes such as OXA-48. These findings demonstrate the strong potential of GNP@Zn–Cu/MOF@Au as a reliable and sustainable alternative to conventional matrices for rapid and accurate detection of carbapenemase activity in clinical diagnostics.
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DOI
PubMed
高影响因子
Batteries-Basel
·
2025
·Vol. 11
·期 11
·418
·
IF 4.8
Lang Xu,Zhipeng Wang,Ya Li,Jie Ding,Xiang Li,Ziqian Wang,Mingjiao Wu,Qiujian Zhang,Mingwu Xiang,Wei Bai,Fangkun Li,Yongshun Liang
Copper (Cu) doping is recognized as an effective strategy to enhance the electrochemical properties of LiNi1−x−yCoxMnyO2(NCM) cathode materials. However, the influence of Cu2+doping on particle size and grain boundary fusion remains insufficiently explored. A simple microwave-assisted solution combustion synthesis method was used to introduce Cu2+into LiNi0.5Co0.2Mn0.3O2(NCM523), aiming to regulate particle size and grain boundary fusion. The results demonstrate that increasing the Cu2+doping content promotes particle growth, while an appropriate doping level reduces the degree of grain boundary fusion and cation mixing. Benefiting from these structural improvements, the optimized LiNi0.5Co0.2Mn0.29Cu0.01O2(Cu–1) cathode exhibits significantly enhanced electrochemical performance, delivering a discharge capacity of 128.6 mAh g−1after 100 cycles at 0.2 C, which is 32 mAh g−1higher than value of the undoped sample (96.6 mAh g−1). These findings underscore that tailored Cu2+doping can effectively optimize the microstructure of NCM523, leading to superior cycling stability, and provide new insights into the design of high-performance NCM cathodes.
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高影响因子
Advanced Materials Technologies
·
2025
·Vol. 10
·期 13
·2401998
·
IF 6.2
Yongkuan Wu,Haolong Li,Jinsong Leng,Zhichun Zhang,Yanju Liu
This study successfully fabricates an ultra-lightweight buckypaper(BP)-Ni-Cu layered structure film using vacuum filtration and chemical-electroplating methods, achieving a thickness of 34 µm and a surface density of 50 g m − 2 . The film exhibits a notably low surface square resistance of 9.5 mΩ □ −1 . Regarding electromagnetic shielding performance, it exhibits exceptional effectiveness across multiple frequency bands: 96.67 dB in the Partial S-band (2.6–4 GHz), 65.05 dB in the C1 band (4–6 GHz), 64.23 dB in the C2 band (6–8 GHz), 87.04 dB in the X band (8–12 GHz), and 90.46 dB in the Ku band (12–18 GHz). In terms of mechanical properties, compared with the tensile fracture strength of 33.67 MPa of the BP film, the tensile fracture strength of the BP-Ni film is enhanced to 51.9 MPa, and that of the BP-Ni-Cu film is elevated to 49.43 MPa. Additionally, the film demonstrates good thermal stability at temperatures up to 300 ° C. It also exhibits favorable electrical conductivity. Overall, considering its excellent characteristics, including multi-band shielding and ultra-lightweight properties, this film presents a novel and highly promising solution for aerospace electromagnetic shielding applications.
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高影响因子
Polymers
·
2020
·Vol. 12
·期 4
·783
·
IF 3.426
Ke Wang,Qian Ma,Yuanming Zhang,Shudong Wang,Guangting Han
In this study, Cu/Ag/polydopamine (PDA)/polyester (PET) fabrics were fabricated for multi-functional textiles. The PET fabrics were firstly modified by dopamine to form a polydopamine (PDA) layer on the fiber surface, then Ag nanoparticles (Ag NPs) were anchored on fiber surface through chelation between PDA and Ag+ions, and the Ag NPs were further used as catalytic seeds for in situ reduction of Cu nanoparticles (Cu NPs). The surface morphology, chemistry, and crystalline structure of the prepared PET fabrics were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). As expected, Cu NPs were evenly dispersed on the surface of fibers. The Cu/Ag/PDA/PET fabrics showed good antibacterial property againstEscherichia coliand exhibited excellent electromagnetic interference (EMI) shielding ability. The Cu/Ag/PDA/PET fabrics with high performance antibacterial and EMI shielding properties can be applied as functional protective textiles.Keywords:Cu NPs;Ag NPs;polydopamine;PET fabrics;antibacterial;electromagnetic interference shielding
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2016
·Vol. 41
·期 4
·1509-1517
·
IF 3.277
Shanshan Fu,Guojuan Ren,Shuang Li,Fang Chai,Chungang Wang,Fengyu Qu
In this work, cyclic annular Au–Cu nicotinates were synthesized through a facile one-pot method. Cupric nitrate trihydrate, hydrogen tetrachloroaurate and nicotinic acid were used as the initial reactants; nicotinic acid was found to be an excellent ligand. The Au–Cu nicotinate annularity rings were characterized by X-ray diffraction, transmission electron microscopy and scanning electron microscopy with energy-dispersive X-ray spectroscopy. Specifically, the shape of the assembled Au–Cu nicotinate rings can be readily controlled by changing the ratio of the reactants and the reaction time. The mechanism of growth of the Au–Cu nicotinate annular rings was also investigated; the results of the experiments indicate that the Au–Cu nicotinate annular rings were assembled from ultrathin nanosheets. The Au–Cu nicotinate rings exhibit excellent catalytic activity toward the reduction of nitrophenols (including 2-nitrophenol, 3-nitrophenol, 4-nitrophenol and 4-nitrothiophenol) by sodium borohydride in water. Experimentally, the optimized ratio of the components was found to be Au : Cu : nicotinate close to 1 : 4 : 1. Kinetic rate investigations were carried out for the Au–Cu NRs-catalyzed reactions at different cycles. Importantly for their use as catalysts, the Au–Cu nicotinate rings can be recycled and exhibit good reusability. These results indicate that Au–Cu nicotinate rings are an effective catalyst for environmental wastewater treatment.
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高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Jinlian Bi,Liyong Yao,Jianping Ao,Shoushuai Gao,Guozhong Sun,Qing He,Zhiqiang Zhou,Yun Sun,Yi Zhang
The issues of rough surface morphology and the incorporated additives of the electro-deposited Cu layers, which exists in electrodeposition-based processes, is one of the major obstacles to improve the efficiency of Cu(In,Ga)Se 2 (CIGSe) and Cu 2 ZnSnSe 4 (CZTSe) solar cells. In this study, the pulse current electro-deposition method is employed to deposit smooth Cu film on Mo substrate in CuSO 4 solution without any additives. Grain size of the deposited Cu film is decreased by high cathode polarization successfully. And the concentration polarization , which results from high pulse current density, is controlled successfully by adjusting the pulse frequency. Flat Cu film with smooth surface and compact structure is deposited as pulse current density @ 62.5 mA cm −2 , pulse frequency @100,000 Hz, and duty cycle @ 25%. CIGSe and CZTSe absorber films with flat surface and uniform elemental distribution are prepared by selenizing the stacking metal layers electro-deposited by pulse current method. Finally, the CIGSe and CZTSe solar cells with conversion efficiency of 10.39% and 7.83% respectively are fabricated based on the smooth Cu films, which are better than the solar cells fabricated by the rough Cu film deposited by direct current electro-deposition method.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Ruonan Guo,Yiliang Zhu,Xiuwen Cheng,Junjing Li,John C. Crittenden
In this study, bimetal layered double hydroxides (Co x Cu y -LDHs) containing a carbonate interlayer were synthesized using coprecipitation with a variety of Co/Cu mole ratios. Meanwhile, the corresponding layered double oxides (Co x Cu y -LDOs) were prepared as controls. In this study, Electrical energy per order was performed to evaluate economic analysis. Correspondingly, we found that Co x Cu y -LDHs possessed a significantly better PMS activation capability than the corresponding metal oxide composite (Co 3 O 4 /CuO). Compared with other Co x Cu y -LDHs, Co 2 Cu 1 LDH possessed the best PMS activation capability for LOM degradation and the lowest electrical energy per order (EE/O) value during the reaction. Additionally, Co 2 Cu 1 LDH presented an excellent stability and worked over a wide pH range. The hydroxide states of Co(III), Co(II), Cu(I) and Cu(II) were all able to activate PMS, indicating that there were many active sites on the surface of Co 2 Cu 1 LDH. The involvement of radicals in this reaction system was determined via scavenger experiments and electron paramagnetic resonance (EPR). Meanwhile, it's worth noting that a mathematical model was developed to quantify the involvement of SO 4 − and OH. Subsequently, we determined PMS activation mechanism and LOM decomposition pathway for the PMS/Co 2 Cu 1 LDH system.
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高影响因子
iScience
·
2025
·
IF 4.1
Hong Qian,Binxia Yuan,Yuhao Liu,Li Wang,Rui Zhu,Pengyu Dong
TiO 2 has low photocatalytic activity due to its easy recombination of photogenerated charges and low visible light utilization efficiency. This study utilized the keto-enol tautomerism principle of fructose in an alkaline environment to successfully obtain Cu 2 O/TiO 2 (CT), Cu 2 O/TiO 2 /Cu (CTC), and TiO 2 /Cu (TC) catalysts. As Cu(I) transformed into Cu(0), the bandgap narrowed, significantly enhancing visible light absorption. Photocatalytic tests showed that CT-0.15 exhibited the highest hydrogen production rate (279.53 μmol g −1 h −1 ), which was 25.18 times higher than that of TC-2. However, CTC-1 had the highest CO production rate (10.58 μmol g −1 h −1 ). Optoelectronic test revealed that CT-0.15 and CTC-1 had higher separation efficiency of photogenerated exciton. Density functional theory (DFT) calculations indicated that the change in the valence state of Cu influenced the reaction mechanism, with CT being favorable for the adsorption of H + in HER and CTC promoting the adsorption of CO 2 in carbon dioxide reduction reaction (CO2RR).
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PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Zikang Hou,Baogang Zhang,Xia Li,Yuanjie Liang
Tailoring a highly active interlayer in Pd electrodes is critical for determining electrode performance and stability. In this study, an active Cu-porphyrin interlayer is electrodeposited onto the sponge nickel (SN) skeleton. The modified sponge nickel is subsequently used to support Pd particles and fabricate an effective Pd/Cu-P/SN composite electrode. Compared with the initial Pd/SN electrode, the increase in dechlorination efficiency is 3.59 times for the Pd/Cu-P/SN electrode. Furthermore, substantial improvements in both mass activity and current efficiency are achieved, with respective increases of approximately 14.2-fold and 4.2-fold relative to the untreated electrode. These significant enhancements are ascribed to the well-designed active Cu-porphyrin interphase. Specifically, the Cu-porphyrin interlayer on the SN skeleton provides an enlarged specific surface area, thus accommodating a greater dispersion of Pd particles. Additionally, the confinement of Pd particles on Cu-porphyrin regions leads to the establishment of Pd Cu interfaces, and this interfacial intimacy expedites the evolution of active hydrogen, leading to a high electrocatalytic removal rate even at an elevated 4-chlorophenol concentration. The Pd/Cu-P/SN composite electrode presented here shows a great application potential for the electrocatalytic treatment of organic chlorophenol wastewater, which also paves a new avenue for enhancing electrode properties through rational introducing of metal-porphyrin interphase.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Cheng Chen,Li Liu,Jing Guo,Lixiang Zhou,Yeqing Lan
Sulfur-doped copper-cobalt bimetallic oxides (S-CuYO) with abundant Cu(I) were successfully synthesized by a co-precipitation method and were for the first time utilized to activate peroxymonosulfate (PMS) for the degradation of chloramphenicol (CAP). For comparison purposes, sulfur-doped monometallic oxides (S-CuO and S-CoO) and non-doped copper-cobalt bimetallic oxide (CuCoO-1) were also prepared via the same processes. The results demonstrated that S-CuCoO had the highest catalytic activity among the catalysts. The sulfur-doped catalyst significantly improved the catalytic performance and stability. More than 98% of CAP (20 mg/L) was removed within 15 min at the initial pH = 5. The superior catalytic activity of S-CuCoO mainly resulted from the synergy of Cu(I) and Co(II). The presence of Cu(I) improved the conversion of Co(III) to Co(II), which maintained the high catalytic performance of S-CuCoO. In addition, the produced Cu(II) was further converted to Cu(I) by lattice oxygen (O 2− ), ensuring an adequate supply of Cu(I) in the catalyst. Radical quenching experiments revealed that both the SO 4 − and OH radicals were generated by the interaction of S-CuCoO with PMS, thereby contributing to the efficient degradation of CAP and the OH radicals played a larger role. The main intermediates of the CAP degradation were identified by high-performance liquid chromatography–mass spectrometry (HPLC-MS/MS). Theoretical calculations of the frontier electron densities (FEDs) were performed to determine the possible degradation pathways of CAP.
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高影响因子
Journal of Nanomaterials
·
2019
·
IF 2.233
Manlin Li,Weiqiu Huang,Bo Tang,Fujiao Song,Aihua Lv,Xiang Ling
The Cu-BTC, a widely studied metal-organic framework (MOF), has been applied in various fields such as gas adsorption, separation, storage, and catalysis. However, the Cu-BTC collapses due to the replacement of the organic linker by water molecules under humid conditions, which limits its practical application in industries. In consideration of the undesirable water effect on the framework stability of Cu-BTC, a stable activated carbon (AC) was incorporated into it by the in situ method to yield a composite material AC/Cu-BTC with high water stability. XRD and SEM patterns proved that the AC7%/Cu-BTC successfully retains its crystal structure after being exposed to water molecules. The adsorption amount of n-hexane vapor of the AC7%/Cu-BTC after water vapor adsorption-thermal desorption is 307% of that of the Cu-BTC. The addition of the AC changes the adsorption active sites and reduces the strong affinity of the Cu-BTC to water molecules, resulting in the AC7%/Cu-BTC having a much lower adsorption rate for water vapor than the Cu-BTC. Therefore, the AC7%/Cu-BTC can be protected from a large amount of water molecules and avoid structural collapse caused by the disconnection between the copper center and the organic linker. The composite displays a potential value for stable applications of MOF-based materials under ambient conditions.
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高影响因子
STAR Protocols
·
2022
·
IF 0
Xiaotong Li,Qian Liu,Jianghao Wang,Hao Bin Wu
Summary Heterostructured catalysts based on Cu and oxides are promising for the efficient conversion of CO 2 to multi-carbon products. In this protocol, we describe the fabrication and characterization of Cu/oxide heterostructured catalysts and the evaluation approach of electrochemical CO 2 reduction reaction (CO 2 RR) performance in an H-type cell. We also provide the details of in situ surface-enhanced Raman measurement and theoretical calculations. The protocol can be useful for constructing self-supported electrodes and assessing the CO 2 RR performance of as-fabricated electrodes. For complete details on the use and execution of this protocol, please refer to Li et al. (2022) .
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