WATER SCIENCE AND TECHNOLOGY
·
2013
·Vol. 68
·期 6
·1251-1257
·
IF 1.102
Yan Qishe,Zhang Luyun,Jiang Meiling,Zhang Ruiqin,Sun Hongwen
The sorption of chloramphenicol on four types of sediment and the effect of coexistence Cu(II) on the sorption were studied. Sorption isotherms and thermodynamic analysis were employed to dispose the experimental sorption data. Experimental results showed that organic matter was the dominant parameter and the coexistence of heavy metal Cu(II) could promote the sorption of chloramphenicol on four tested sediments. The adsorption parameter analysis showed sorption of chloramphenicol on the sediment was not pure distributional effects, not a strong interaction between molecule and surface, but other weak interactions. Thermodynamic parameters values such as Δ G , Δ H and Δ S were all below zero, which indicated that the sorption was a spontaneous and exothermal process.
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ENVIRONMENTAL ENGINEERING SCIENCE
·
2016
·
IF 1.481
Qiang Li,Juhong Zhan,Bo Chen,Xiangqi Meng,Xuejun Pan
Long-root Eichhornia crassipes (L.R.E. crassipes), as a new kind of macrophyte, was used in Dianchi Lake in recent years, but its comparison in eliminating metals with traditional Eichhornia crassipes was never conducted. In this article, a comparative study on the removal of toxic metals from aqueous solutions by L.R.E. crassipes and E. crassipes was first studied. In total, the removal percentage of toxic metals followed the order of Pb>Cd>Cu>Zn, and L.R.E. crassipes was better than that with E. crassipes. Meanwhile, L.R.E. crassipes had a higher relative growth rate than E. crassipes, and solutions had a better physicochemical property after dealing with L.R.E. crassipes. Results also showed that maximum removal capacity for Zn, Cu, and Cd with L.R.E. crassipes was reached at pH 5. An orthogonal of L16 (44) in the multimetal system was designed to study the effects of cometals on removal of a single metal. Metal removal from the solution involves two stages: adsorption and absorption. Removal mainly occurred in the roots, and the main removal process was adsorption. Adsorption percentages of Pb, Zn, Cu, and Cd were 75%, 43%, 29%, and 61% in the root surface, respectively. Bioconcentration factors of Pb, Zn, Cu, and Cd were 267, 102, 230, and 173 with L.R.E. crassipes, respectively. Based on these results, L.R.E. crassipes could be used as a biodegradable absorbent to purify polluted water bodies fast and effectively.
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Micromachines
·
2018
·Vol. 9
·期 12
·678
·
IF 2.222
Pinhua Zhang,Haoming Sun,Wenhui Guan,Jinjin Liang,Xiaomeng Zhu,Junkai Zhang,Min Chen,Meng Cao,Wenbing Qian,Kefu Gao,Guangliang Cui
The nanostructures with uniform long-range ordered structure are of crucial importance for performance standardization of high-quality surface-enhanced Raman scattering (SERS) spectra. In this paper, we described the fabrication and SERS properties of Au decorated Cu (Au@Cu) nanoarrays. The Cu nanoarrays with uniform long-range ordered structure were first synthesized by in-situ electrochemistry assembly on insulated substrate. The Cu nanoarrays can reach a size of centimeters with strictly periodic nano-microstructure, which is beneficial for the production and performance standardization of SERS substrates. Then Au nanoparticals were decorated on the Cu nanoarrays by galvanic reaction without any capping agent. The obtained Au@Cu nanoarrays exhibit excellent SERS activity for 4-Mercaptopyridine, and the sensitivity limit is as low as 10−8M. Therefore, this facile route provides a useful platform for the fabrication of SERS substrates based on nano ordered arrays.
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JOURNAL OF ELECTRONIC MATERIALS
·
2016
·Vol. 46
·期 5
·2746-2751
·
IF 1.491
Xie Dewen,Xu Jingtao,Liu Zhu,Liu Guoqiang,Shao Hezhu,Tan Xiaojian,Jiang Haochuan,Jiang Jun
Bi 2 Te 3 thermoelectric materials have been developed for refrigeration around room temperature. But the ZT values decrease quickly above 400 K, which need to be improved for applications in power generation. In the present work, P -type Cu/BiSbTe alloys have been prepared via a zone melting method followed by spark plasma sintering. Due to the effects of Cu powders, the as-prepared materials exhibit a shift of the peak Seebeck coefficient value towards higher temperature and suppressed lattice thermal conductivity with increasing Cu powders. A peak ZT value as high as 0.87 has been obtained around 500 K in the BiSbTe alloy with 1 wt.% Cu powder addition, and the ZT values stabilize above 0.8 from 375 K to 550 K. This high and stable value for BiSbTe alloys at such a high temperature is very attractive for its application in power generation devices.
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RSC Advances
·
2023
·Vol. 13
·期 49
·34524-34533
·
IF 3.9
Suo Zhao,Qiao Wang,Jin Liu,Xianglong Hao,Xiao Liu,Wenfei Shen,Zhonglin Du,Yao Wang,Mikhail Artemyev,Jianguo Tang
In this study, ZnS capped Cu–In–S (ZCIS) quantum dots doped with Mn ions are synthesized by a thermal injection method, with luminescence covering almost the entire visible area. The large Stokes shift effectively inhibits the self-absorption effect under luminescence, and the quantum yield of ZCIS quantum dots increased from 38% to 50% after ZnS capping and further to 69% after doping with Mn. First, red-, yellow-, and blue-emitting quantum dots were synthesized and then, polychromatic ensembles were obtained by mixing the trichromatic quantum dots in a different ratio. Using the home-built inkjet printer, multilayered and multicolor mixed patterns were obtained for information pattern storage and multilayer pattern recognition and reading.
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高影响因子
SCRIPTA MATERIALIA
·
2013
·Vol. 69
·期 8
·574-577
·
IF 2.821
Limeng Liu,Lianbing Zhong,Baoyou Zhang,Zhonghong Lai,Feng Ye,Zhiguo Zhang,Yu Zhou
The effects of the addition of 5 mol.% aluminum , copper, silver or gold on the densification , microstructures, mechanical properties and oxidation resistance in thin air of TaC ceramics were investigated. Full density and relatively high flexural strength (up to 738 MPa) were observed in the case of the Au addition after spark plasma sintering at 1700 °C for 5 min under 30 MPa pressure. Due to wetting of the TaC grains by a thin metallic film , the consolidated materials showed enhanced oxidation resistance against thin air.
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JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 18
·9092-9099
·
IF 5.968
Shiguo Chen,Yujuan Guo,Shaojun Chen,Huimin Yu,Zaochuan Ge,Xuan Zhang,Peixin Zhang,Jiaoning Tang
Due to the outbreaks of infectious diseases caused by different pathogenic bacteria and development of antibiotic resistance, researchers are actively searching for new antibacterial agents. Synergistic antibacterial effects provide a new way to prepare antibacterial systems to fight resistant bacteria. In this study, novel copper (Cu)/titanium dioxide (TiO2)/chitosan (CS) (CTC) three-component nanoparticles were facilely prepared via photocatalytic reduction on the basis of the synergistic antibacterial principle. The structure, antibacterial activity and antibacterial mechanism of CTC were investigated systematically. The results showed that this hybrid material exhibits excellent antibacterial ability against Escherichia coli and Staphylococcus aureus due to the synergistic antibacterial effect of the Cu, TiO2 and CS components in the nanoparticles. The minimal inhibition concentrations (MIC) of CTC against E. coli and S. aureus are only 5.22 μg mL−1 and 2.61 μg mL−1, respectively, much lower than the two-component systems. Thus, the encouraging results presented in this study demonstrate great potential applications of CTC as an alternative candidate for an antibacterial agent with high antibacterial activity.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xingjie Lu,Jie Liu,Jiayi Chen,Wenjing Wang,Bingrui Ma,Wenxiang Xia,Yizhen Tang
Cu-Mn electronic coupling stabilizes spinel manganese ion sieves. • Cu doping reduces first-cycle Mn dissolution from 3.33% to 0.21%. • Cu-HMO retains 96.8% of lithium uptake after ten regeneration cycles. • Cu substitution raises Mn-vacancy formation energy by 0.403 eV. • Cu doping strengthens lithium binding from −3.515 to −4.556 eV. Manganese-based lithium ion sieves suffer from Mn dissolution and structural degradation during acid regeneration. Herein, Cu-doped HMO (Cu-HMO) was developed to simultaneously enhance Li + adsorption and structural stability. Cu incorporation preserved the spinel Mn O framework while increasing the specific surface area and regulating the Mn valence distribution. XPS revealed decreased Mn 3+ and increased Mn 4+ fractions accompanied by low-valence Cu species, indicating Cu Mn electronic coupling that suppresses Jahn-Teller distortion and Mn 3+ disproportionation. Cu-HMO exhibited a maximum Li + adsorption capacity of 49.15 mg/g at 298 K and maintained superior performance in the presence of various competing ions. During ten adsorption-desorption cycles, Cu-HMO exhibited improved capacity retention and markedly reduced Mn dissolution, with the first-cycle Mn dissolution rate decreasing from 3.33% for HMO to only 0.21% for Cu-HMO, corresponding to a reduction of approximately 94%. Density functional theory (DFT) calculations showed that Cu substitution increased the Mn-vacancy formation energy by 0.403 eV and strengthened Li adsorption from −3.515 to −4.556 eV. These results demonstrate that Cu-induced electronic regulation provides an effective strategy for constructing stable and selective manganese ion sieves. Download: Download high-res image (208KB) Download: Download full-size image
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2024
·
IF 4
Yong-Xiang Wu,Xun Zhou,Benwang Zhou,Chao Li,Peng Cui,Manhuan Cheng,Yang Wang,Xinsong She
Presently, Cu(OH) 2 nanowire arrays@Cu Foam (Cu(OH) 2 –NWA@Cu Foam) nanostructure has been confirmed to possess an excellent capacity of nonenzymatical electroanalysis of histamine (His). Based on Cu(OH) 2 –NWA@Cu Foam electrode, electrochemical investigations elucidated electron transfer kinetics principles of electrooxidation of His. Substantially, it was realized that a four–electron–transferring dehydrogenation was involved in diffusion–controlled electrooxidation of His, contributing tremendously to establishing as–proposed mechanization of His electrooxidation. At optimal conditions, Cu(OH) 2 –NWA@Cu Foam electrode reflected excellent electrochemical performance such as sensitivity of 3.089 mA mM –1 cm –2 , limit of determination of 94 nM, respond time of 1.6 s and linear respond rang of 0.5–1250 μM. The outperformed electroanalytical performance can be physically explicated by the dedications from larger exposed surface area, bigger interface–hydrophilicity–deduced His diffusion coefficient and less charge transfer resistance. Moreover, the outstanding selectivity, stability and reproducibility of Cu(OH) 2 –NWA@Cu Foam electrode ensured its practical effectiveness in regulating real His levels in fermented mandarin fish. Compared with control group, the mandarin fish by inoculating Lactobacillus sakei subsp . sakei delivered less His contents, deducing that inoculation of Lactobacillus sakei subsp . sakei can effectively depress His generation during fermentation process. Eventually, the one–step as–established Cu(OH) 2 –NWA@Cu Foam nanostructure positioned itself as an upcoming possibility to pursue commercialized utilization.
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Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Lebing Chang,Kun Li,Zeyun Cai,Peng Du,Yongxiao Wang,Chao Zhou,Enxiang Jiao,Ahsan Riaz Khan,Guoqiang Xie,Weizong Bao,Haijun Zhang
Mo alloys have emerged as a promising biodegradable metallic material due to its inherent biocompatibility and mechanical robustness. However, its clinical translation is limited by slow degradation kinetics and intrinsic brittleness. In this study, we propose a powder metallurgy-based strategy to develop immiscible Mo-Cu alloys that overcome these challenges. Cu is introduced as alloying element which due to higher corrosion potential, excellent plasticity and antimicrobial properties. The optimized Mo-Cu alloy shows a notable increase in strength by 150 MPa while maintaining ductility. Moreover, the degradation rate nearly doubles from 2.553×10 -2 to 4.765×10 -2 mm/y) due to microstructural refinement and galvanic effects. In vitro studies further confirm the biocompatibility and enhanced antibacterial performance of Mo-Cu alloys. This work provides a practical pathway for designing next-generation biodegradable implants based on immiscible alloy systems.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2026
·
IF 16.8
Jiaxin Jiang,Huicai Xie,Zhiwen Shen,Zhixing Ye,Junfeng Wang,Lei Zhang,Jianjian Gong,Zhaojun Mo,Jun Shen
EuTiO 3 -based materials (ETO) exhibit impressive magnetocaloric performance, but the low thermal conductivity restricts their practical applications. Therefore, enhancing the thermal conductivity of these materials is crucial to advance their applications in magnetic refrigeration technology. Herein, we present a novel approach to enhance the thermal conductivity of EuTiO 3 -based magnetocaloric materials by constructing continuous Cu networks. For this purpose, copper plating layers were deposited on the surface of EuTi 0.75 Al 0.125 Zr 0.125 O 3 (ETAZO) powders via electroless plating. The influences of plating temperature, pH value, and plating duration on the structure and morphology of the plated copper layer were investigated, obtaining the optimal process for electroless copper plating on ETAZO microspheres. The formation process of copper plating layers was investigated, revealing the mechanism of electroless copper plating. On this basis, continuous Cu networks were successfully constructed in a cold-pressed ETAZO/Cu composite. The high thermal conductivity of copper enables rapid heat conduction through Cu networks, thereby significantly enhancing the thermal conductivity of the composite. Encouragingly, the thermal conductivity of the composite reaches 2.18 W m −1 K −1 at 4.2 K, indicating an increase of 35 times compared to ETAZO (0.06 W m −1 K −1 ). Meanwhile, the maximum magnetic entropy change of the composite under the magnetic field change of 0‒1 T remains 15.6 J kg −1 K −1 , exhibiting impressive magnetocaloric performance. The combination of outstanding magnetocaloric effect and high thermal conductivity enables ETAZO/Cu composite to be a practical cryogenic magnetic refrigerant.
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ChemCatChem
·
2026
·Vol. 18
·期 3
·e01581
·
IF 3.9
Wuyang Xiao,Fuhe Le,Rui Sheng,Xue Yang,Xueying Cao,Wei Jia
Perovskites with tunable compositions and structures are desirable electrocatalysts for water electrolysis. However, achieving efficient hydrogen evolution reaction (HER) in alkaline media using perovskite-based catalysts remains a significant challenge. Herein, a Cu-doped La 0.5 Ba 0.5 CoO 3–δ perovskite was synthesized via a sol-gel method, which exhibits enhanced HER electrocatalytic activity through the construction of dual active sites. X-ray photoelectron spectroscopy (XPS) and x-ray absorption fine structure (XAFS) analyses reveal that Cu doping simultaneously induces the oxidation of Co and the formation of oxygen vacancies, establishing a synergistic charge compensation between the dual active sites. Specifically, oxygen vacancies promote water dissociation by enhancing adsorption, while high-valence Co species reduce charge transfer resistance, thereby facilitating electron transfer during HER. As a result, the optimized La 0.5 Ba 0.5 Co 0.8 Cu 0.2 O 3–δ (LBCC 0.2 ) achieves low overpotentials of 160 mV and 228 mV at current densities of 10 and 100 mA·cm −2 , respectively. Moreover, the catalyst demonstrates outstanding stability, maintaining 200 h for HER operation, outperforming commercial Pt/C. This study highlights the advantage of dual active sites in boosting the intrinsic electrochemical activity and underscores the potential of Cu-doped perovskites for efficient hydrogen production. Graphical A Cu-doped La 0.5 Ba 0.5 CoO 3-δ perovskite (LBCC 0.2 ) was synthesized using a sol–gel method for alkaline hydrogen evolution reaction (HER). The resulting dual active sites, comprising Co species and oxygen vacancies, collectively enhance the electrical conductivity and accelerate HER kinetics of LBCC 0.2 . This leads to a low overpotential of 160 mV at a current density of 10 mA·cm −2 and an excellent stability over 200 h.
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