NANOTECHNOLOGY
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2020
·Vol. 31
·期 32
·325502
·
IF 3.551
Nianfeng Shi,Shupei Sun,Bo Zhang,Qian Du,Yanxin Liao,Xiaoming Liao,Guangfu Yin,Zhongbing Huang,Ximing Pu,Xianchun Chen
Co(OH)2 nanosheets/Cu(OH)2 nanorods composite electrodes for non-enzymatic glucose detection were fabricated by electrodepositing Co(OH)2 nanosheets on Cu(OH)2 nanorods substrate grown directly on the copper sheet via a simple one-step reaction. The Co(OH)2 nanosheets/Cu(OH)2 nanorods composite electrode was characterized by scanning electron microscopy, energy dispersive x-ray spectroscopy, x-ray diffraction and x-ray photoelectron spectroscopy. The glucose sensing performance of the composite electrode was investigated by cyclic voltammetry and chronoamperometry. The composite electrode shows high sensitivity of 2366 µA mM−1 cm−2 up to 2 mM with a lower detection limit of 0.17 mM (S/N = 3). The composite electrode is highly selective to glucose in the presence of various substances that always co-exist with glucose in real blood samples. The response of the composite towards human blood serum was in good agreement with that of commercially available glucose sensors, suggesting that a promising electrode material for highly sensitive and selective non enzymatic detection of glucose can be envisioned.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
·
IF 7.489
Ying Gao,Yihui Wu,Hanwei He,Wenyu Tan
Development of cost-effective and efficient earth-abundant catalysts for hydrogen evolution reaction (HER) is a great challenge. In this study, by one-step potentiostatic electrodeposition, the Ni–Se–Cu electrocatalyst on nickel foam was fabricated as a binder-free HER electrocatalyst. As compared with Ni–Se electrocatalysts, such fabricated Ni–Se–Cu electrocatalyst exhibited prominent electrocatalytic activity to the HER in alkaline electrolyte. This Ni–Se–Cu electrocatalyst exhibits a small overpotential of 136 mV to achieve a current density of 10 mA·cm −2 and high electrochemical stability. The remarkable HER properties of Ni–Se–Cu electrocatalyst mainly originate from high electronic conductivity induced by Cu-doping. This work shows a cheap and simple avenue to develop high efficient non-noble electrochemical electrocatalysts for HER.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Shanshan Xu,Xiangyu Guo,Zhihua Qiao,Hongliang Huang,Chongli Zhong
Cu-BTC is a copper paddlewheel-based metal–organic framework (MOF) with great potential in gas adsorption and heterogeneous catalysis but has restricted practical applications because of its poor water stability. In this work, we propose a strategy for one-step synthesis and in situ functionalization of isopropanol (IPA)-modified Cu-BTC (Cu-BTC-IPA) with enhanced water stability. Successful incorporation of IPA into Cu-BTC was evidenced by proton nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy spectra. The introduction of methyl groups around unsaturated Cu sites can form a methyl-shielding microenvironment, endowing Cu-BTC-IPA with the ability to maintain the topology structure after being immersed in water even for 4 days. After soaking, Cu-BTC-IPA can preserve 95% of its original Brunauer–Emmett–Teller (BET) surface areas and 90% of its initial CO2 adsorption capacity, while Cu-BTC completely lost its crystallinity. In addition, Cu-BTC-IPA managed to preserve its main crystal structure and 83% of its initial BET surface areas after 12 h of immersion in diluted HCl solution (pH = 3). The improved hydrolysis stability mechanism of Cu-BTC-IPA was investigated using density functional theory calculations. The results suggest that the strategy of incorporating IPA into Cu-BTC is very efficient in enhancing its structure stability against water and worthy of further exploitation in improving the structure stability of other MOFs with open metal sites.
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Journal of CO2 Utilization
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2020
·
IF 5.993
Guangyong Shi,Wei Xu,Jichao Wang,Ye Yuan,Somboon Chaemchuen,Francis Verpoort
The coordination of pyridylcarboxylate (isonicotinic acid, IN) with copper (II) fabricates a Cu(IN)-MOF. The characteristic properties of the Cu(IN)-MOF are obtained via different analysis techniques such as XRD, SEM, BET, ICP, TG, etc. The advantage of copper(II) coordinated with a bi-functional organic linker (IN), containing a pyridyl and carboxylate group, is demonstrated by the chemical properties of which the Cu(II)-based MOF exhibits excellent catalytic performance for the CO 2 carboxylation of terminal alkynes. No noble-metal, co-catalyst, or additives are required to execute the reaction. The effectiveness of the Cu(IN)-MOF was demonstrated with a variety of substrates (>11). Moreover, the Cu(IN)-MOF, as a heterogeneous catalyst, can be recycled at least 5 times retaining its excellent catalytic performance. Herein, we report the first copper (II) metal-organic framework (Cu(IN)-MOF) applied for the carboxylation of alkynes with CO 2 demonstrating several advantages such as stable catalyst, avoiding the use of an expensive noble-metal, straightforward synthesis.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Zinashbizu Mengesha Ayalew,Xiangyuan Zhang,Xuejun Guo,Sana Ullah,Siwen Leng,Xiaoyan Luo,Na Ma
Traditional chemical precipitation generates a large volume of sludge required by further hazardous waste disposal. For reducing this drawback, four oligo-ethyleneamine dithiocarbamates (OEDTC), including ethylenediamine-dithiocarbamate (E 1 -DTC), diethylenetriamine-dithiocarbamate (E 2 -DTC), triethylenetetramine-dithiocarbamate (E 3 -DTC) and tetraethylenepentamine-dithiocarbamate (E 4 -DTC) were synthesized to remove Cu, Ni and Zn directly from acidic wastewater. Based on S dose, which was an essential element for metal removal, the treatment effectiveness order of the four OEDTC for Cu and Ni was E 1 -DTC > E 2 -DTC > E 4 -DTC > E 3 -DTC. The theoretical molar ratios of S toward Cu, Ni and Zn for the completed metal removal from single component were 1.5:1, 2:1, 2.2:1 for E 1 -DTC; 2:1, 2.6:1, 2.9:1 for E 2 -DTC; 2:2, 3:1, 3.9:1 for E 3 -DTC; and 2:1, 2.7:1, 2.8 for E 4 -DTC, respectively. The four OEDTC had marked preference for Cu over Ni and Zn from multiple components of simulated wastewater. They showed high removal efficiency for the complex-formed Ni and Zn from actual electroplating wastewater, yielding the effluent residual 0.003–0.008 and 0.021–0.046 mg/L, respectively. When the four OEDTC were precipitated with the three metals, FT-IR suggested the coordination of metals with S and SEM indicated densely packed particle formation. The yielded OEDTC-metals sludge enriched with heavy metals exhibited potential to be recycled.
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高影响因子
MICROCHEMICAL JOURNAL
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2020
·
IF 3.594
Xiu-Fang Huang,Bing-Xue Ren,Chi-Fang Peng,Xin-Lin Wei,Zheng-Jun Xie
In this study, the fluorescence enhancement effect of guanine base on DNA-Cu/AgNCs was reported and fluorescent methods for the determination of Hg 2+ or Cu 2+ ion were established. The effect of adjacent and inserted guanine base (G) sequences in DNA template on the fluorescence intensity of DNA-Cu/AgNCs was investigated. It was found that G 5 sequence extended from the 5′ end of a typical C-riched DNA strand, 5′-CCCTTAATCCCC-3′ (DNA1), demonstrated fluorescence enhancement effect in the preparation of the DNA-Cu/AgNCs. Moreover, this G5-DNA-Cu/AgNCs can be used to determine Hg 2+ and Cu 2+ ions due to fluorescence quenching by the two metal ions while the DNA1-Cu/AgNCs only can determine Hg 2+ ions. Specific assays for Hg 2+ ions and Cu 2+ ions were established through masking Cu 2+ ions by EDTA and Hg 2+ ions by NaBH 4 , respectively. In Hg 2+ determination, a linear range from 5.0 nM to 40 nM was obtained with a detection limit of 1.0 nM. In Cu 2+ determination, a wide linear range from 0.01 µM to 5.0 µM was obtained with a detection limit of 5.0 nM. The recoveries of 89.6–106.8% for Cu 2+ ions and 90.6–106.2% for Hg 2+ ions were obtained in the measurements of Hg 2+ and Cu 2+ ions spiked lake samples, respectively. The results indicate the potential application of the DNA-Cu/AgNCs as a metal ions probes in real samples.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Tengjiao He,Yonghou Xiao,Qidong Zhao,Mengxue Zhou,Gaohong He
Separation of carbon dioxide (CO2) from a CO2/ethylene (C2H4) mixture represents an important and challenging field in industrial applications. Selective adsorption has become an attractive option as an energy-saving and environmentally friendly CO2 capture technology. In this work, an ultramicroporous metal–organic framework (MOF) Qc-5-Cu was prepared by solution method and applied for the highly selective separation of CO2 from an C2H4 stream. The performance of Qc-5-Cu was evaluated by static and dynamic adsorption experiments. It was found that the single-component adsorption capacities of CO2 and C2H4 on Qc-5-Cu at 298 K and 1 bar were 2.48 and 0.74 mmol/g, respectively. The measured breakthrough curves further illustrate that Qc-5-Cu could effectively separate CO2 from the C2H4 stream for more than 10 cycles. The pore size of the obtained Qc-5-Cu was ∼3.3 Å, as characterized by nitrogen adsorption. The ultramicroporous structure of Qc-5-Cu benefits the separation of CO2, as evidenced by the selectivity values of the CO2/C2H4 binary mixture (1:99, v/v) based on the ideal adsorbed solution theory (SIAST ≈ 39.95 avg.), which are larger than some MOFs with open metal sites, owing to the weak interaction between organic ligands with high aromaticity and C2H4, as well as the porous screening effect of Qc-5-Cu on ethylene. The observed high selectivity, excellent stability, and regeneration performance demonstrate that Qc-5-Cu is a promising adsorbent for the separation of the CO2/C2H4 mixture.
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JOURNAL OF SOLID STATE CHEMISTRY
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2021
·
IF 3.498
Wei Shuang,Hui Huang,Ming Liu,Tianyu Bai,Jijie Zhang,Danhong Wang
Copper sulfides are proved to be good candidates as anode materials for sodium ion batteries due to their abundant resources, moderate cost, and relatively high electrical conductivity . However, poor rate performance and cycling life still hinder their development as anode materials for sodium-ion batteries. Herein, we synthesized carbon-coated copper sulfide nanorod assembled into octahedron composites (CuS x @C) by sulfuration of a Cu-based metal-organic framework (Cu-MOF) under different temperatures. These composites with hierarchical structure exhibited superstable cycling performance as anodes of sodium-ion batteries. The CuS x @C sample obtained under 500 °C showed discharge capacity of 208 mA h g - 1 at 2 A g - 1 over 6300 cycles. Porosity and hierarchical stucture facilitate the storage of sodium ion, and carbon-coated structure buffers volume change of anode materials during the electrochemical reaction .
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高影响因子
Journal of Environmental Chemical Engineering
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2021
·
IF 5.909
Linhai Yang,Xuechang Ren,Yujie Zhang,Zuoyan Chen
This article is an in-depth study of the basis of Cu + -decorated triazine-based g-C 3 N 4 (Cu + /g-C 3 N 4 ) nanosheet-activated H 2 O 2 . In this study, peroxymonosulfate (PMS) was activated by Cu + /g-C 3 N 4 under sunlight and used to treat simulated wastewater RhB. The properties of g-C 3 N 4 and Cu + /g-C 3 N 4 were characterized by UV–Vis DRS and PL . The results indicated that the introduction of Cu + in g-C 3 N 4 can enhance the separation of photogenerated electron-hole pairs. The Cu + /g-C 3 N 4 (1:4) samples exhibited the best PMS activation performance under sunlight when 0.5 g/L catalyst dose and 0.5 mmol/L PMS concentration were used, and the removal rate of RhB reached 95.7% in 30 min. Moreover, better catalytic activity of the system can be achieved in the initial pH range of 2.0–10.0. The investigation results of the catalytic mechanisms showed that the prepared Cu + /g-C 3 N 4 catalyst constructs a dual reaction center of Cu + /Cu 2+ cycling and e CB − / h VB + transfer for efficient PMS activation. The degradation of pollutants benefits from the participation of a variety of free radicals, which are generated by sunlight-assisted heterogeneous activation of PMS. This study has resulted in substantial progress in activating multiple oxidants with a single heterogeneous catalyst and provides a feasible way to treat refractory wastewater using Cu + /g-C 3 N 4 with PMS under sunlight.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Yuning Tang,Sa Wang,Xin Zhou,Ying Wu,Shikai Xian,Zhong Li
A facile and efficient room-temperature synthesis approach was proposed to prepare MOF material Cu(Qc) 2 (henceforth called RT-Cu(Qc) 2 ) with ultramicropores. RT-Cu(Qc) 2 was successfully synthesized at room-temperature by means of (Zn, Cu) hydroxyl double salt as intermediate within 1–12 h. The resulting RT-Cu(Qc) 2 exhibited excellent water vapor stability and its C 2 H 6 uptake reached 2.19 mmol/g at 288 K and 1 bar. Its C 2 H 6 /C 2 H 4 and C 2 H 6 /CH 4 uptake ratio at 298 K and 1 bar were up to 3.70 and 22.67, superior to benchmark MAF-49, Cu(Qc) 2 and ZIF-7. Its IAST-predicted C 2 H 6 /C 2 H 4 and C 2 H 6 /CH 4 selectivity reached 4.1 (1:1 v:v) and 35.9 (1:9 v:v) at 288 K and 1 bar, higher than most of ethane-capturing MOFs. Molecular simulation revealed well-defined host–guest match between Cu(Qc) 2 and ethane. Fixed bed experiments confirmed that ethane/ethylene or ethane/methane mixtures can be completely separated using RT-Cu(Qc) 2 . RT-Cu(Qc) 2 has great potential for separation of ethane/ethylene and the recovery of ethane from natural gas.
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高影响因子
Catalysts
·
2019
·Vol. 9
·期 11
·952
·
IF 3.444
Huiyuan Xue,Jingjing Xu,Xingxing Gong,Rongrong Hu
The in-situ hydrodeoxygenation of bio-derived phenol is an attractive routine for upgrading bio-oils. Herein, an active trimetallic Ni-Cu-Co/Al2O3catalyst was prepared and applied in the in-situ hydrodeoxygenation of bio-derived phenol. Comparison with the monometallic Ni/Al2O3catalyst and the bimetallic Ni-Co/Al2O3and Ni-Cu/Al2O3catalysts, the Ni-Cu-Co/Al2O3catalyst exhibited the highest catalytic activity because of the formation of Ni-Cu-Co alloy on the catalyst characterized by using X-ray powder diffraction (XRD), temperature programmed reduction (TPR), N2physisorption, scanning electron microscope (SEM), and transmission electron microscope (TEM). The phenol conversion of 100% and the cyclohexane yield of 98.3% could be achieved in the in-situ hydrodeoxygenation of phenol at 240 °C and 4 MPa N2for 6 h. The synergistic effects of Ni with Cu and Co of the trimetallic Ni-Cu-Co/Al2O3catalyst played a significant role in the in-situ hydrodeoxygenation process of phenol, which not only had a positive effect on the production of hydrogen but also owned an excellent hydrogenolysis activity to accelerate the conversion of cyclohexanol to cyclohexane. Furthermore, the catalyst also exhibited excellent recyclability and good potential for the upgrading of bio-oils.Keywords:bio-derived phenol;Ni-Cu-Co/Al2O3;in-situ hydrodeoxygenation;cyclohexane;hydrogenolysis
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
·
IF 3.131
Enyang Liu,Xiaoli Yin,Jinhui Hu,Sirong Yu,Yan Zhao,Wei Xiong
Many attentions have been attracted to prepare superhydrophobic coatings on the metal surfaces for their prominent properties, especially the self-cleaning and anti-corrosion properties. In this work, a facile electrodeposition method was applied to fabricate hierarchical Cu-Ni coating on the 316 L stainless steel , and the followed myristic acid modification was used to lower the surface energy. The water droplet would remain spherical on this coating, and measured water contact angle and sliding angle were 161.27° and 7.8°, respectively. The contaminants on the coating surface could be easily carried away by the closed water droplets. In addition, the coating could effectively hinder the deposition of salt solution. Besides, the coating could endure long-term acid solution immersion and natural placement. Moreover, it was verified that this superhydrophobic Cu-Ni coating formed a robust barrier to block the transmission of chlorine ions , thus corrosion damage to steel surface could be effectively relieved. This superhydrophobic Cu-Ni coating provides a novel strategy and promising applications for preventing various metal surfaces from being contaminated and corroded.
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高影响因子
危险品化学品经营许可证（带存储）