Journal of Energy Chemistry
·
2018
·
IF 3.886
Yunfeng Bao,Chunlei Huang,Limin Chen,Yu dong Zhang,Long Liang,Jinjun Wen,Mingli Fu,Junliang Wu,Daiqi Ye
Anatase TiO 2 nanosheets (-ns-) with dominant exposed {001} facets were used as support to load copper, and the synthesized Cu/TiO 2 -ns catalysts were evaluated for CO 2 hydrogenation to methanol. Under the reaction conditions, P = 3.0 MPa, T = 260 °C, V (N 2 ): V (H 2 ): V (CO 2 ) = 8:69:23 and gas hourly space velocity (GHSV) = 3600 mL g −1 h −1 , the methanol yield reached an appealing high value, 5.6%. Copper-loading amount, calcination temperature and reduction atmosphere have been investigated in this work, which significantly influence the particle sizes of copper and/or the defect concentration in TiO 2 , then leading to different catalytic performance. Characterizations of XRD, EPR, CO 2 -TPD and FTIR demonstrate that higher specific surface area of Cu is good for the hydrogenation of CO 2 and adequate amount of Ti 3+ plays important roles in CO 2 activation. Both of them facilitate high turnover frequency (TOF) of methanol formation.
✓ 已验证
DOI
高影响因子
Science China-Physics Mechanics & Astronomy
·
2018
·Vol. 61
·期 9
·1-4
·
IF 2.754
Zhang Yue,Liu Wenhao,Si Jin,Zhu Xiyu,He Chengping,Zhao Haonan,Wen Hai-Hu
Superconductivity is observed in a new nontoxic cuprate system Ga-Ba-Ca-Cu-O, with T c = 82 K for GaBa 2 Ca 5 Cu 6 O 14 + δ ( 5 (Ga-1256) and T c = 116 K probably for GaBa 2 Ca 3 Cu 4 O 10+δ (Ga-1234) or GaBa 2 Ca 2 Cu 3 O 8+δ (Ga-1223), respectively. All compounds are fabricated by solid state reaction method under high pressure and high temperature. Samples are characterized by resistivity, magnetization and X-ray diffraction (XRD) measurements. The temperature dependence of magnetization measured in both zero-field-cooled and field-cooled processes on one sample (S1) shows two superconducting transitions at about 82 K and 113 K. The estimated shielding fraction for the phase with T c of 82 K is about 67%, while the fraction for another phase with T c of 113 K is quite small. The XRD Rietveld refinement for S1 indicates two main phases existing in the sample, Ga-1256 with fraction of about 58% and non-superconducting Ca 0.85 CuO 2 with fraction of about 42% respectively. Thus, we can conclude the superconducting phase with transition temperature of 82 K is due to Ga-1256. The resistivity measurement also confirms the superconductivity for S1, and the resistivity reaches zero at about 82 K. The temperature dependence of magnetization for another sample (S2) shows much higher superconducting shielding fraction for the phase with T c of 116 K, which may be a promising prospective for the synthesis of Ga-1234 or Ga-1223 phase.
✓ 已验证
DOI
高影响因子
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.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Jihong Liang,Yifan Zheng,Zongjian Liu
Cu electrodes are prepared by thermal annealing of Cu nanowires under Ar atmosphere at 600–800 °C for 30 min. Investigation of as-prepared electrodes by both X-ray diffractometry and scanning electron microscopy indicates that after annealing a rise in the size of Cu nanowires occurs due to the melting of some small-sized Cu nanowires. When the annealing temperature is not too high (e.g. 600 °C), the melting of small-sized nanowires may create many tightly-connected junctions among big-sized nanowires, leading to the formation of a stable, porous nanowire network. The measurements of both electrochemical active surface areas and electrocatalytic activity of these Cu electrodes demonstrate that their active surface areas decrease with increasing the annealing temperature and the electrode prepared at 600 °C shows the highest activity for reduction of nitrate in acidic medium. Examination of the electrode prepared at 600 °C as nitrate sensor via differential pulse voltammetry reveals that this sensor exhibits excellent performance: a linear response ranging from 8 to 5860 μM (R 2 = 0.999), a sensitivity of 1.375 μA/μM, and a detection limit of 1.35 μM at a signal-to-noise ratio of 3. Compared with the Cu-based sensors reported in the literature, this nanowire-based sensor not only possesses the broadest linear range but also has a very low detection limit. Its stability, anti-interference ability, and application to nitrate detection in real samples are also investigated.
✓ 已验证
DOI
高影响因子
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.
✓ 已验证
DOI
高影响因子
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.
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2021
·Vol. 13
·期 18
·3960-3966
·
IF 5.686
Peng Ren,Qinglin Li,Tao Song,Zhaozhan Wang,Ken Motokura,Yong Yang
In this study, we report a highly stable and efficient single-atom Cu dispersed on N-doped porous carbon as a superior catalyst for azide-alkyne cycloaddition reaction. A broad set of 1,4-disubstituted 1,2,3-triazoles was synthesized in high to excellent yields with good tolerance of various functional groups in a cost-effective, environment-friendly manner. Parallel studies show that the single-atom Cu with unique coordination structure exhibits superior catalytic activity to the metallic Cu nanoparticles analogue. Remarkably, the single-atom Cu catalyst demonstrates robust stability and can be reused several times without variations in activity and regioselectivity. Graphical Single-atom catalysis : A single-atom Cu dispersed on N-doped carbon exhibits superior catalytic activity for efficient and selective AAC reaction to access a broad set of 1,4-disubstituted 1,2,3-triazoles in a facile and environmentally-benign manner. Single-atom Cu catalyst demonstrates both higher reactivity and stronger stability than the supported Cu nanoparticles under the same reaction conditions.
✓ 已验证
DOI
高影响因子
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
✓ 已验证
DOI
高影响因子
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.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yuan Gao,Jiaqi Sun,Pei-Lin Gao,Qi Zhao,Xinyi Yu,Yujie Song,Jun Hu,Dan Wang,Zhi-Gang Shen,Ze-Hai Xu,Hua Sheng,Zhong-Ting Hu
A bactericidal membrane (CNTs-PEI/CZIS) was designed by anchoring Cu-ZnIn 2 S 4 on CNTs-PEI. • In N coordination contributes to the structural stabilization between the CZIS and CNTs-PEI. • CNTs-PEI/CZIS has ultra hydrophilicity/oleophobicity with O/W separation efficiency of ~100%. • CNTs-PEI/CZIS has bactericidal rate of ~100% both at 10 6 CFU mL −1 (artificial) and actual water. • CNTs-PEI/CZIS has excellent self-cleaning and stable long-term antibacterial activity. Membrane technology for water disinfection (MTWD) offers high effluent quality with a small footprint, but its practical application is still limited by bacterial fouling-induced flux decline and insufficient long-term disinfection capability. Herein, we designed a self-cleaning CNTs-PEI/Cu-ZnIn 2 S 4 composite membrane by depositing an ultralow amount of copper-supported ZnIn 2 S 4 (CZIS) nanoflowers (only 2.5 mg per 50 mm-diameter membrane) onto polyethyleneimine-functionalized carbon nanotubes (CNTs-PEI). This membrane preserves the high permeability and hydrophilic-oleophobic characteristics (oil-water separation efficiency of 99.3 ± 0.6%, with a max flux of 6470 ± 500 L m −2 h −1 bar −1 ) is mainly ascribed to the CNTs-PEI construction, as well as the efficient photocatalytic sterilization activity (with an efficiency ~100% under bacterial concentration of 10 6 CFU mL −1 ) and its self-cleaning capability (overall, >6000 L m −2 h −1 bar −1 ) is demonstrated to CZIS nanomaterial. In practical test, the antibacterial efficiency in natural water reaches ~100% even over 20 cycles. The integrated properties of CNTs-PEI/Cu-ZnIn 2 S 4 composite membrane are related to the design of interfacial coupling between CZIS and CNTs-PEI through In N coordination and the combination of visible-light photocatalytic activity. This work provides a promising strategy on constructing a novel composite membrane for overcoming biofouling by bacterial disinfection. A visible-light-driven carbon nanotubes (CNTs)-based composite membrane enables efficient water disinfection and purification. By anchoring Cu-ZnIn 2 S 4 nanoflowers onto hydrophilic-oleophobic PEI-functionalized CNTs, the membrane achieves ~100% bactericidal efficiency and excellent antifouling/self-cleaning performance. Its functionality in bacterial inactivation highlights its potential in sustainable and advanced water treatment technologies. Download: Download high-res image (211KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Xiao-Hui Wang,Yue-Han Qin,Xue Xiao,Yu Chen,Shu-Ni Li
Histidine-functionalized Cu 2 O effectively stabilizes Cu + species under cathodic conditions. • The histidine functionalization enhances the co-adsorption of *CO and *NO x intermediates. • The formation of an interfacial hydrogen-bond network on the catalyst surface accelerates proton transfer kinetics. • The histidine-functionalized Cu 2 O catalyst achieves a high urea Faradaic efficiency alongside a notably high yield rate. Electrocatalytic C-N coupling for urea synthesis from CO 2 and nitrate (NO 3 - ) offers a sustainable alternative to the energy-intensive industrial process. Copper (Cu)-based catalysts are uniquely capable of activating both CO 2 and NO 3 - ; however, the catalytically active Cu + species is prone to over-reduction to Cu 0 under cathodic conditions, leading to poor selectivity and instability. Herein, we report a histidine-functionalized Cu 2 O nanospheres (His-Cu 2 O NSs) that stabilize Cu + under operating conditions. The preserved Cu + electronic structure promotes synchronized adsorption of *CO and *NO x intermediates, while protonated amino groups construct a hydrogen-bonded interfacial water network that accelerates proton transfer. As a result, the optimized catalyst achieves a urea Faradaic efficiency of 42.3% and a yield rate of 41.9 mmol h −1 g −1 at −1.1 V potential, with exceptional stability over 100 h in both H-type and flow cells. In situ spectroscopy and density functional theory calculations reveal that histidine coordination not only enhances *CO adsorption but also lowers the energy barrier for C-N coupling, thereby accelerating C-N bond formation. Meanwhile, the in-situ EXAFS results indicate that Cu + species can effectively be retained after histidine modification. This work establishes a molecular-level design principle for regulating complex multi-reactant electrocatalysis and provides a versatile strategy for promoting efficient C-N coupling reactions. Download: Download high-res image (156KB) Download: Download full-size image Functionalizing Cu 2 O nanospheres establishes a generalizable stabilization-via-delocalization principle providing a blueprint for designing durable organic-inorganic interfaces for electrocatalytic urea synthesis.
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2026
·
IF 4.3
Peng Zhang,Guang-Hui Liu,Yao-Shun Wen,Yu-Hong Kang,Yang-Fan Yin,Sheng Li,Zhi-Hao Ma,Zhi-Xin Li
Crystallinity engineering of La 2 O 2 CO 3 boosts RWGS reaction performance. • Cu/La-24 achieves 58.3% CO 2 conversion with 99.9% CO selectivity at 600 °C. • Higher crystallinity strengthens Cu-support interaction and inhibits catalyst sintering. Reverse water-gas shift (RWGS) reaction offers a promising route for CO production and CO 2 utilization, but its industrialization has been hindered due to the lack of efficient catalysts. Among non-precious alternatives, Cu-based catalysts show high CO selectivity but suffer from poor thermal stability and rapid deactivation. Here, La 2 O 2 CO 3 support crystallinity engineering was adopted to enhance the performance over Cu-based catalysts. Cu/La-24 (high support crystallinity) and Cu/La-6 (low support crystallinity) catalysts were synthesized and evaluated. Compared with Cu/La-6 catalyst, Cu/La-24 catalyst exhibited a better CO 2 conversion (58.3% at 600 °C), while improving the reaction rate and catalytic stability. Characterization results revealed that higher crystallinity strengthened metal-support interaction, enhanced CO 2 adsorption capacity and inhibited catalysts sintering, collectively boosting catalytic performance. This work demonstrates that crystallinity regulation is an effective strategy for designing stable and active Cu-based catalysts, paving the way for designing more efficient catalysts for RWGS reaction. Download: Download high-res image (182KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）