Materials Today Communications
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2025
·
IF 4.5
Jiamu Li,Xin Ban,Aijia Sun,Han Lai,Huayi Li,Zhengchun Yang,Peng Pan,Jie He,Rui Zhang
This study presents a highly sensitive and cost-effective non-enzymatic glucose sensor based on coral-like Cu/nickel foam bimetallic electrodes. Nickel foam was utilized as a substrate for electrochemical deposition of Cu nanoparticles. Comprehensive analyses using X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) confirmed the formation of coral-like Cu/nickel foam bimetallic structure, significantly enhancing the active sites for glucose oxidation. Electrochemical characterization shows that the electrode has excellent sensitivity for glucose detection. The detection sensitivity of cyclic voltammetry (CV) for 10–100 μM glucose can reach 16,826 μA cm −2 mM −1 , and the detection sensitivity of chronoamperometry (CA) for 0–100 μM glucose is 14,828 μA cm −2 mM −1 . The detection limit is as low as 0.04 μM. The sensor exhibited outstanding selectivity against common interfering substances and maintained high stability in artificial sweat for over a week. Considering the typical glucose levels in human sweat (∼50 μM), this sensor holds significant potential for non-invasive blood glucose monitoring applications.
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Zihan Liu,Yao Xu,Yuxin Heng,Fanghua Liu,Chao Tan,Guijiao Wen,Fujian Xu,Juan He,Ke Huang,Xiaoli Xiong,Xue Jiang
In this paper, a wearable flexible patch featuring a non-enzymatic electrochemical sensor based on Cu single-atom catalysts (SACs) anchored on bipyridine-covalent organic framework (COF) electrode was proposed for specific detection of acetaminophen (AP) in human sweat. The electrode modified material is Cu single atom catalytic material (Cu-TpBpy). The bifunctional TpBpy acts as a support for binding individual Cu atoms through abundant and well-organized N-N chelating sites, while simultaneously serving as an active host for specific recognition/adsorption of AP due to its porous structure and active N sites. The resulting Cu-TpBpy with atomically dispersed Cu sites demonstrated high electrochemical activity for AP, attributed to enhanced electron transfer efficiency and reduced binding and adsorption energies. Density functional theory calculations further reveal that the Cu single-atom anchoring on TpBpy provides superior adsorption of AP than TpBpy alone, resulting in lower binding energy, and higher selectivity and sensitivity. The wearable flexible patch, based on Cu-TpBpy, enabled real-time and accurate detection of AP in human sweat and achieved a linear range of 0.3 µM-5 µM and a limit of detection of 13 nM, with satisfied stability and repeatability. This work developed a highly sensitive non-enzymatic sensing method for wearable flexible patches.
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产品关联
DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 9
·1049
·
IF 4.501
Yan Hao,Dajie Zhao,Wen Liu,Min Zhang,Yixiao Lou,Zhenzhen Wang,Qinghu Tang,Jinghe Yang
Selective dehydrogenation of ethanol to acetaldehyde has been considered as an important pathway to produce acetaldehyde due to the atom economy and easy separation of acetaldehyde and hydrogen. Copper catalysts have attracted much attention due to the high activity of Cu species in O-H and C-H bonds oxidative cleavage, and low process cost; however, the size of the Cu nanoparticle is difficult to control since it is easily suffers from metal sintering at high temperatures. In this work, the Cu/KIT-6 catalyst exhibited an ultra-high metal dispersion of 62.3% prepared by an electrostatic adsorption method, due to the advantages of the confinement effect of mesoporous nanostructures and the protective effect of ammonia water on Cu nanoparticles. The existence of an oxidation atmosphere had a significant effect on the valence state of copper species and enhancing moderate acid sites. The catalyst treated by reduction and then oxidation possessed a moderate/weak acid site ratio of ~0.42 and a suitable proportion of Cu+/Cu0ratio of ~0.53, which conceivably rendered its superior ethanol conversion of 96.8% and full acetaldehyde selectivity at 250 °C. The catalyst also maintained a high selectivity of >99% to acetaldehyde upon time-on-stream of 288 h.Keywords:copper;ethanol dehydrogenation;mesoporous silica
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高影响因子
Analytical Methods
·
2012
·Vol. 4
·期 11
·3785-3791
·
IF 1.547
Essy K. Fodjo,Sara Riaz,Da-Wei Li,Lu-Lu Qu,Niamien P. Marius,Trokourey Albert,Yi-Tao Long
A Surface Enhanced Raman Scattering (SERS) substrate based on Ag/β-AgVO3 nanobelts deposited on copper foil (Cu@Ag/β-AgVO3) was used for the detection of carbamate pesticides: carbofuran, carbaryl, isoprocarb and propoxur. Cu@Ag/β-AgVO3 has shown an excellent SERS activity for carbamate pesticides compared to silver nanoparticles (AgNPs). Under optimized conditions, detection limits of 2.5 pM, 10 pM, 50 pM and 75 pM were obtained for carbaryl, carbofuran, isoprocarb and propoxur respectively, suggesting that Cu@Ag/β-AgVO3 is a good candidate for use as a SERS substrate for the trace level detection of these pesticides.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Wenlong Zhang,Bin Yang,Jingquan Liu,Xiang Chen,Xiaolin Wang,Chunsheng Yang
In order to improve the sensitivity and reduce working temperature of tin oxide sensor, two elements of copper, zinc doped tin oxide gas sensor has been successfully synthesized using one-step hydrothermal method. During the preparation process, the common zinc acetate and cupric chloride were adopted as copper, zinc source, respectively. The morphology and structure of the as-prepared sample were further characterized using X-ray diffraction (XRD), energy dispersive spectrometry (EDS), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HR-TEM), selected area electron diffraction (SAED), and ASAP 2460 (used for mesoporous distribution analysis). It’s found that octahedral nanoparticle enclosed by (221) high energy crystal facet had been prepared. The results also demonstrated that the as-prepared tin oxide doped by copper, zinc elements was single crystal structure of tetragonal system and the size of the crystalline grain was about 50 nm. During the gas sensing performance experiments, the sample’s gas-sensing properties have been proved to be greatly enhanced in sensitivity and working temperature. The response value to 50 ppm ethanol at 110 °C of the sample was increased to 210 that was almost 10 times higher than reported values. Besides, the optimal working temperature was decreased to be 110 °C from reported 350 °C.
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DOI
高影响因子
JOURNAL OF CHEMICAL RESEARCH
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2018
·
IF 0.668
Xiaoyun Ma,Daqin He,Zhengjian Chen
A simple method for the preparation of nitriles in moderate to good yield has been achieved by treatment of aromatic and heterocyclic aldoximes with malononitrile in water at reflux in the presence of copper acetate as catalyst. Arylaldoximes with an electron-donating group showed the highest reactivity, their conversion being achievable at room temperature.
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2022
·
IF 10.753
Yingdong Chen,Rongze Sun,Wentao Yan,Mengyao Wu,Yong Zhou,CongJie Gao
In many important industries, such as the textile printing industry, a large amount of dye/salt wastewater is often discharged, which can destroy the ecological environment of the water body. Membrane technology has a great potential in the treatment of environmental problems caused by dye/salt wastewater. Polyvinyl alcohol (PVA) nanofiltration (NF) membrane has a bright future in dye/salt wastewater treatment , however, works on this are rare. Herein, antibacterial PVA NF membrane incorporated with Cu(OH) 2 nanowires for the dye/salt wastewater treatment is reported. The membrane was prepared via coating the solutions containing PVA, glutaraldehyde and Cu(OH) 2 nanowires on the polyethersulfone ultrafiltration membrane. Cu(OH) 2 nanowires has a diameter of 60 nm and was successfully introduced into the membrane. The introduction of nanowires improved the membrane hydrophilicity and roughness, which is conducive to the improvement of membrane flux. Membrane separation performance for one component solution and dye/salt solution were investigated. The introduction of Cu(OH) 2 increases the flux of the membrane obviously (the highest increase is 178.78% (from 21.49 to 38.42 L·m −2 ·h −1 ·bar −1 , for NaCl solution as the feed). Besides, the membrane doped with nanowires also possessed a high dye/salt selectivity . For one component solution, the dye removal rate was over 97.00% while the salt rejection was low (the lowest was 13.18% (NaCl)). For the dye/salt solution, the dye (Congo Red) rejection kept at a high level (98.91%) and the salt (NaCl) rejection was still low (13.71%), while the flux was also high (37.56 L·m −2 ·h −1 ·bar −1 ). The performance is superior to that of many membranes reported in previous works. Moreover, the Cu(OH) 2 nanowires endowed the membrane with an improved and high antibacterial property. The sterilization rate of Escherichia coli and Staphylococcus aureus reached more than 99.99%.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Guannan Yang,Pengyu Wang,Yu Liu,Shuzhou Lu,Bo Luo,Tao Lai,Shiwo Ta,Tingyu Lin,Jiye Luo,Yu Zhang,Chengqiang Cui
Ag-coated Cu particles (Cu@Ag particles) are highly anticipated bimetallic materials with wide electronic applications. However, it is still crucially challenging to obtain well-covered Ag shells and facilitate the synthetic process, and the sintering/migration behaviors of Cu@Ag particles are also poorly understood. In this study, we develop a facile Ag coating method for Cu@Ag particles with the assistance of double complexing agents. Electrochemical analysis reveals that the complexing effect can effectively reduce the potential difference of the Cu-Ag replacement reaction, and thereby improve the coating quality. Cu@Ag particles with compact and uniform Ag shells are obtained, with Ag contents as low as ~10 at%. The as-prepared Cu@Ag particles show significantly improved oxidation resistance and reliable sintering property. Moreover, the Cu@Ag particles exhibit superior ion migration resistance even better than both Cu and Ag particles under an oxygen-containing environment. The results could provide helpful basis for understanding the synthesis, sintering and migration processes of Cu@Ag particles. The comprehensive performance of Cu@Ag particles makes them a promising interconnected material in future electronic industry.
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DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Lijun Ban,Haitao Li,Yin Zhang,Ruifang Wu,Xin Huang,Jianghong Zhao,Yongxiang Zhao
As more technologies have been developed to produce formaldehyde and acetylene from biomass, the condensation–addition reaction between formaldehyde and acetylene provides a green and atom-economic method to synthesize 1,4-butynediol (BD). It is important to design and construct a new efficient copper-based catalyst for formaldehyde ethynylation with multi-center synergy to improve the reaction efficiency. In this work, a CuO–xZnO composite catalyst with an interface structure was constructed. Compared with a CuO-based catalyst, the yield of BD was increased from 19.07 to 70.9% by introducing an appropriate amount of ZnO, and the reaction activation energy decreased from 28.94 to 16.35 kJ/mol, which improved the catalytic reaction efficiency. The results showed that ZnO in the CuO–xZnO catalyst dispersed the active Cu species and also promoted the conversion of CuO to copper acetylide by electron transfer in the interface structure. Moreover, Zn2+ in ZnO acted as a Lewis acid and adsorbed the carbonyl oxygen of formaldehyde, causing the carbonyl electrons to flow to Zn2+, which enhanced the electropositivity of C+ in the formaldehyde molecule. This resulted in a nucleophilic addition reaction between formaldehyde activated by ZnO and acetylene activated by copper acetylide at the interface, which efficiently generated the target product BD.
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DOI
高影响因子
Catalysis Science & Technology
·
2019
·Vol. 9
·期 23
·6749-6759
·
IF 5.726
Wei Chen,Tongyang Song,Jingxia Tian,Peng Wu,Xiaohong Li
Indirect CO2 conversion to ethylene glycol (EG) and methanol (ME) via CO2-derived ethylene carbonate (EC) as the intermediate is an attractive and promising approach. Cu-Based catalysts have been regarded as effective catalysts for the hydrogenation of EC to yield ME and EG. In this work, we prepared Cu/SiO2 catalysts through different methods for the hydrogenation of EC to yield ME and EG. The results show that Cu/SiO2-AE catalysts prepared by an ammonia evaporation (AE) method are superior to Cu/SiO2-DP catalysts prepared by a deposition–precipitation (DP) method. After modification using glucose with an optimal amount, the Cu8G1/SiO2-AE catalysts showed enhanced catalytic performance, furnishing 86% selectivity to ME and 99% selectivity to EG at almost full conversion of EC, with a TOF value for ME formation reaching about 39 h−1. A series of techniques such as N2 sorption, ICP-AES, FT-IR, H2-TPR, H2-TPD, TEM, and XPS were adopted to characterize the physicochemical properties of relevant catalysts. It was found that the Cu/SiO2-AE catalyst had a smaller Cu particle size. After modification with glucose, the Cu8G1/SiO2-AE catalyst had the smallest Cu particle size, the highest hydrogen adsorption ability, and the strongest interaction of Cu with SiO2 so that the highest Cu+/(Cu0 + Cu+) molar ratio was detected. In addition, upon investigation of catalyst stability and reusability, it was found that glucose modification for the Cu/SiO2-AE catalyst can also alleviate the deactivation distinctly.
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高影响因子
INORGANICA CHIMICA ACTA
·
2016
·
IF 1.918
Xuefang Shang,Kui Ren,Jie Li,Wanli Li,Jiajia Fu,Xueli Zhang,Jinlian Zhang
A new copper(II) complex based on Schiff bases of 3-nitrosalicylaldehyde was synthesized and the crystal was also obtained fortunately. Its structure was well characterized by single-crystal X-ray diffraction and HRMS. The complex showed the strongest binding ability and high selectivity for hydrogen sulfide among other anions (AcO − , H 2 PO 4 − , F − , Cl − , Br − and I − ) at neutral pH in organic-aqueous solutions. The possible mechanism was the copper ion was released and combined with hydrogen sulfide after the anion was added. In addition, the further application of the sensor was applied to hela cells cytotoxicity. The above results indicated the copper(II) complex could be used as a sensor for the detection of HS − in the sample of environment, pharmacy, and etc. More importantly, the copper(II) complex also exhibited effective and wide antibacterial activity.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Shanshan Xu,Hongliang Huang,Xiangyu Guo,Zhihua Qiao,Chongli Zhong
Application of metal-organic frameworks (MOFs) in the field of gas separation has been widely explored, however most of the reported MOFs are sensitive to hydrolysis, restricting their applications under practical environments. In this work, Cu-BTC with distinguishing high resistance to hydrolysis was prepared through in-situ functionalization with sodium citrate (SC). The obtained Cu-BTC-SC can hold its structure integrity and preserve its original gas adsorption capacity even after 10 days' immersion in water. On this basis, mixed matrix membranes (MMMs) containing different loadings of Cu-BTC-SC in Pebax® 1657 were fabricated and applied for CO 2 /N 2 and CO 2 /CH 4 separation under humid conditions. The MMMs displayed excellent long-term stability towards humidified test conditions as well as improved CO 2 separation performance compared with the pristine Pebax® 1657 membrane. Specifically, the membrane incorporated with 15 wt% of Cu-BTC-SC demonstrated a CO 2 permeance of 1102.5 GPU together with a CO 2 /N 2 selectivity of 54.8 for the CO 2 /N 2 mixed gas, and a CO 2 permeance of 1069.6 GPU together with a CO 2 /CH 4 selectivity of 32.5 for the CO 2 /CH 4 mixed gas, surpassing the Robeson upper bounds for CO 2 /N 2 and CO 2 /CH 4 separation. These results demonstrate a potential effective strategy for improving the water stability of MOFs and suggest a promising candidate for the fabrication of high performance membranes for practical large-scale CO 2 separation applications.
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高影响因子
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