Journal of Energy Chemistry
·
2024
·
IF 14
Xuejun Xu,Rutao Meng,Yue Liu,Han Xu,Jianpeng Li,Yi Zhang
Solution-processed chalcopyrite solar cells are widely regarded as a promising alternative method in reducing the cost compared with vacuum-based techniques. It is noted that the absorber layer usually needs to be prepared under a high insert pressure (∼1.6 atm) to suppress element loss or under a mild pressure but additional surface etching is needed for fabricating high efficient solar cell. Herein, a copper gradient structured precursor is proposed to prepare CuIn(S,Se) 2 (CISSe) film under a mild pressure (1.1 atm). The designed gradient Cu not only promotes crystal grain growth and tailors the defects, but also avoids the surface etching of the formed CISSe film for the fabrication of high efficient solar cells. Further, Cu gradient design decreases the conduction band offset of heterojunction, boosting the carriers transport across the p-n heterojunction. Accordingly, a 13.35% efficient CISSe solar cell, comparable to the high efficient CISSe solar cell prepared by this method under high pressure or with film surface etching, is fabricated. This work provides a facile pathway to fabricate high efficient solution-processed chalcopyrite solar cell, avoiding high selenization pressure and film etching, and shows huge potential for solution-processed copper-based solar cells.
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高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Zaharaddeen N. Garba,Saadatu A. Hamza,Chavalit Ratanatamskul
In this study, a novel impregnation method was adopted by adding Cu 2+ to microcrystalline cellulose (MCC) powder, producing a composite material (Cu-MCC) that was used as a sorbent to treat water contaminated by crude oil. The produced Cu-MCC was examined using a variety of characterization techniques. With the application of central composite design (CCD) for testing the influenced parameters, the experimental and predicted oil sorption capacity (OSC) values were 10.61 and 9.86 mg/g, respectively at the optimal condition of initial concentration (120 mg/100 mL), sorbent dosage (80 mg) and reaction time of 78 mins. This indicates that the predicted values from the model agree closely with the experimental values, with only a small error of 0.75. The adsorption data were simulated using five different versions of the linearized Langmuir equations along with the Freundlich and Temkin adsorption isotherms. Langmuir-2, which denotes a monolayer sorption process best describes the equilibrium adsorption data giving maximum sorption capacity of 6.48 mg/g with pseudo-second order model as the best model for the kinetics data. The findings show that Cu-MCC is very promising as an effective material for cleaning up water contaminated from crude oil.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Jianli Liang,Qianqian Song,Jing Lin,Gen Li,Yi Fang,Zhonglu Guo,Yang Huang,Chun-Sing Lee,Chengchun Tang
Porous boron nitride (BN) materials have been considered as a promising material for CO2 capture and storage. It was found that the Cu2+ ion can modify the nucleation mechanism during the synthetic reaction between boric acid and melamine leading to the formation of Cu-loaded BN nanofibers with uniform and smaller diameter. Interestingly, the introduction of Cu was found to dramatically enhance the CO2 adsorption capacity of the BN nanofibers from 1.34 to 2.77 mmol g–1 (at 1 bar, 273 K). The Cu-loaded BN nanofiber not only shows a CO2 adsorption capacity comparable to those of state-of-the-art BN-based CO2 absorbents but also shows unprecedented high recyclability for repeated uses. The mechanisms of the copper-induced CO2 adsorption capacity enhancement were investigated with density-functional theory calculations. It was found that the incorporation of Cu can change the electron transfer between porous BN and CO2 to promote the affinity and adsorption capacity of CO2.
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高影响因子
Nano Research
·
2024
·Vol. 17
·期 6
·4898-4907
·
IF 9.5
Geng Jing,Ji Sihan
Electrocatalytic nitrate ( \({\rm{N}}{{\rm{O}}_3}^ -\) ) reduction to ammonia (NH 3 ) offers a viable approach for sustainable NH 3 production and environmental denitrification. Copper (Cu) possesses a distinctive electronic structure, which can augment the reaction kinetics of \({\rm{N}}{{\rm{O}}_3}^ -\) and impede hydrogen evolution reaction (HER), rendering it a promising contender for the electrosynthesis of NH 3 from \({\rm{N}}{{\rm{O}}_3}^ -\) . Nevertheless, the role of Cu 2 O in copper-based catalysts still requires further investigation for a more comprehensive understanding. Herein, the Cu 2 O/Cu(OH) 2 heterostructures are successfully fabricated through liquid laser irradiation using CuO nanoparticles as a precursor. Experimental and theoretical researches reveal that Cu 2 O/Cu(OH) 2 heterostructure exhibits enhanced electrocatalytic performance for \({\rm{N}}{{\rm{O}}_3}^ -\) to NH 3 because Cu(OH) 2 promotes electron transfer and reduces the valence state of Cu active site in Cu 2 O. At −0.6 V (vs. reversible hydrogen electrode (RHE)), the NH 3 yield reaches its maximum at 1630.66 ± 29.72 \({\rm{\mu g}} \cdot {{\rm{h}}^{ - 1}} \cdot {\rm{m}}{{\rm{g}}_{{\rm{cat}}}}^{ - 1}\) , while the maximum of Faraday efficiency (FE) is 76.95% ± 5.51%. This study expands the technical scope of copper-based catalyst preparation and enhances the understanding of the electrocatalytic mechanism of \({\rm{N}}{{\rm{O}}_3}^ -\) to NH 3 .
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yuxuan Wu,Yinda Li,Yunhao Lu,Jicheng Jiang,Aijun Zhou,Bo Xu,Xiongwen Xu,Jian Tu,Bin Pan,Xinbing Zhao,Jian Xie
Among some practical O3-type layered oxide cathodes, NaNi 1/3 Fe 1/3 Mn 1/3 O 2 (NFM) features a high specific capacity and moderate cyclability. However, sluggish Na + transfer kinetics, low structural stability, and rapid capacity loss during long-term cycling, are still posing a challenge to commercial applications of this material. In this work, we propose a Mg and Cu co-doped O3-type NaMg 0.02 Cu 0.02 Ni 0.33 Fe 0.27 Mn 0.36 O 2 (MC-NFM) with a stable structure and good cycling stability. It was found that the Mn O bonds in MC-NFM are obviously reinforced by synergistic doping with small amounts of Mg and Cu, leading to enhanced structural robustness, decreased Na + migration barrier, and delayed O3-P3 phase transition. As a result, longer cycle life and enhanced rate performance are achieved. MC-NFM can yield a specific capacity of 142.1 mAh g −1 at 0.1C and 116.0 mAh g −1 at 5C, and maintain 83.6 % of its initial capacity after 400 cycles at 1C. This work provides a promising design of O3-type cathode for sodium-ion batteries.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 7
·077510
·
IF 4.386
Tao Zhan,Xiao-Zhen Feng,Yun-Yun Cheng,Guo-Cheng Han,Zhencheng Chen,Heinz-Bernhard Kraatz
Folic acid (FA) plays an indispensable role in human body and sometimes needs to be taken as a drug supplement, especially for pregnant women. Herein, an electrochemical FA sensor was constructed by electrodepositing Cu and ferrocene carboxylic acid (Fc(COOH)) on a glassy carbon electrode (GCE), indicating low cost, simple preparation and short time consumption. Furthermore, the field emission scanning electron microscopy illustrates that Fc(COOH) completely covering Cu nanoparticles (CuNPs) grew to be tufts of loose and porous nanoflowers in situ, which produces a large active surface area to adsorb FA. Results verify that two conjected materials exhibited a good synergistic amplification effect on FA signal. Ultimately, a great linear relationship of FA was established between 100.0 ∼ 1000.0 μM under optimized conditions by differential pulse voltammetry (DPV). The limit of detection was 33.3 μM, and the sensitivity was 0.10149 μA·μM−1·cm−2. The sensor Fc(COOH)/CuNPs/GCE showed satisfactory selectivity and stability and could be used for FA detection in FA tablets samples with an average recovery of 91.43 ∼ 100.68%, and a relative standard deviation less than 3.17%. The consistency and validity were affirmed by comparisons with an ultra-visible spectrophotometer.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Xuesong Shan,Keru Song,Siyu Huang,Jianwen Wang,Fengyue Shi,Dongyu Zhao
The annealing approach is usually used to synthesize carbon-based materials. We use polystyrene (PS) microspheres as a template to composite with carbon nanotubes (CNTs) loaded by Cu-Ni ions. After One-step high-temperature treatment, the PS microspheres disappear, and the composite materials become a three-dimensional porous structure. At the meantime, the Cu-Ni ions are reduced and attached to the material (CNTs/Cu-Ni/CP (CMP)). Then, the CMP material is coated with Polyaniline (PANI). The two-step high-temperature treatment accomplishes the Nitrogen-doped process of the material (CNTs/Cu-Ni/CP@CPANI (CMPN)). Electrochemical analysis indicates that materials have a high specific capacitance value (356F/g at 0.5 A/g). After 10,000 cycles of charging and discharging, the capacitance retention rate is 92.57 %. The assembled symmetrical supercapacitor possesses outstanding energy and power density (11.92 Wh kg −1 at 700.73 W kg −1 ).
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Qiwu Guo,Yu Zhang,Peipei Ai,Jiangtao Zhao,Jinxian Zhao,Wei Huang
Utilizing hexagonal boron nitride (BN) with elevated surface area and numerous exposed edges as a support can significantly enhance the catalytic performance. In this study, defect-rich boron nitride sheet (BNS) was facilely prepared via ball-milling of BN and a Cu/BNS catalyst was developed for dimethyl oxalate (DMO) hydrogenation to ethylene glycol (EG). The treated BNS owned increased edge defects and surface area. These edge defects can disperse and further stabilize the Cu species via the formation of interfacial B-O-Cu bonds, resulting in the high dispersion of Cu species and enhanced interaction between the metal and the support, and thus contributing to the anchoring of the Cu nanoparticles. Consequently, the Cu/BNS catalyst exhibited remarkable catalytic performance and stability, with a high EG selectivity of 98.84 % and stability of 750 h. This work provides a new perspective for the development of two-dimensional boron nitride as a support material for heterogeneous catalysts.
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高影响因子
Journal of Superconductivity and Novel Magnetism
·
2020
·Vol. 33
·期 11
·3607-3613
·
IF 1.244
Zhang Zhanjun
In this work, we reported the Ce-Cu co-substituted M-type strontium hexaferrites Sr 0.7 Ce 0.3 Fe 12- x Cu x O 19 (0.00 ≤ x ≤ 0.50) prepared by using the solid-state method. The specific effect of Ce-Cu co-substitution on the magnetoplumbite structure and magnetic properties were studied systematically. The canonical M-type strontium hexagonal phase has been formed for our prepared sample in all doping range, which also has been confirmed by FTIR spectrum. In all compositional range, by the way, the magnetic competition of ferromagnetism-antiferromagnetism is reduced and gradually disappeared under the increasing substitution. Likewise, an obvious improvement of magnetic properties can be obtained; that is, H c increases from 2850 to 3800 Oe and the value of M s can reach up to 70.305 emu/g. The intrinsic stability and superior magnetic performance of such kind of material indicate a promising potential candidate in multilayer inductors.
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高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Youning Chen,Shuang Jia,Wei Zhao,Juan Song,Yuhong Li,Huan Wang
A novel ethylenediamine chelating resin (PEDA-g-PS) was prepared by grafting poly (glycidyl methacrylate) onto the chloromethylated polystyrene beads via surface-initiated atom transfer radical polymerization (SI-ATRP), and followed by the ring-opening reaction of epoxy and amine groups. The resin was characterized by infrared spectroscopy, scanning electron microscopy and elemental analysis. The adsorption property for Cu(II) and Cd(II) on the resin was examined. By analyzing adsorption isotherm, adsorption kinetics and the influence of solution pH on the adsorption capacity, the adsorption of Cu(II) and Cd(II) on PEDA-g-PS resin was proved to be Langmuir single-layer adsorption model, and adsorption process conformed to pseudo-second-order kinetic equation. The maximum adsorption capacities for Cu(II) and Cd(II) could reach 1.19 and 1.95 mmol·g –1 at pH 3.0 by fitting Langmuir model. The adsorption of the Cu(II) and Cd(II) was hardly affected by common coexisting ions such as Na (I), K (I), Ca (II) and Mg (II), whereas they were slightly decreased when Fe (II) and Zn (II) coexisted in the solution, which illustrated the selective adsorption of Cu(II) and Cd(II) from wastewater. After ten adsorption–desorption cycles, the adsorption capacity of the resin did not change significantly, indicating that the resin exhibited excellent adsorption properties for heavy metal ions and excellent reusability.
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高影响因子
Environmental Earth Sciences
·
2021
·Vol. 81
·期 1
·1-11
·
IF 2.784
Suo Chongxian,Yao Xin,Song Zhiwei,Dong Xiaoqiang
There is an urgency to develop a more economical and environmentally friendly solidifier/stabilizer to treat the heavy metal contaminated soil with improved strength. In this study, the red mud, a kind of solid waste material from the alumina factory, was added into the soil to form the compound solidifier/stabilizer with cement to treat the copper-contaminated soil. The mechanical characteristics of solidified/stabilized soil were analyzed systematically, as well as the microstructure by SEM, EDS, and XRD. Besides, the leaching toxicity of solidified/stabilized soil was also tested. The results show that the red mud residue compound solidifier/stabilizer exhibits a better solidification efficiency than the pure cement, and the copper leaching amount values are all far below the standard limit. In this study, the red mud residue content is proposed as 15–45%. As for the stress–strain relationship characteristic of solidified/stabilized soil, it would differ notably with copper concentration. In addition, the microscopic analyses support the hydration products of solidified/stabilized soil that are mainly composed of hydrated calcium silicate/calcium silicate aluminate hydrate, calcium carbonate, and ettringite, which can solidify/stabilize the copper ion and increase the unconfined compressive strength. Thus, the red mud waste has great potential to be popularized as a source applied in heavy metal treatment.
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高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Yun Gao,Hang Zhang,Jian Peng,Jinsong Wang,Xiaohao Liu,Lingling Zhang,Yao Xiao,Li Li,Yang Liu,Yun Qiao,Jiazhao Wang,Shulei Chou
High-performance, cost-effective cathodes are essential for grid-scale sodium-ion batteries (SIBs). Prussian blue analogs (PBAs) have shown great potential as SIB cathodes, but achieving both high capacity and long lifespan remains challenging. In this study, a series of low-cost ternary PBAs synthesized through structural regulation is presented to simultaneously achieve high capacity, stable cycling performance, and broad temperature adaptability. Among them, CuHCF-3 demonstrates a specific capacity of 132.4 mAh g −1 with 73.3% capacity retention over 1000 cycles. In-depth analyses, using in situ techniques and density functional theory calculations, reveal a highly reversible three-phase transition (monoclinic ↔ cubic ↔ tetragonal) in Na 1.96 Cu 0.45 Mn 0.55 [Fe(CN) 6 ] 0.91 ·□ 0.09 ·2.14H 2 O (CuHCF-3), which is driven by synergistic interactions between Mn and Cu. Mn enhances conductivity, increases the operating voltage, and introduces additional redox centers, while Cu mitigates the Jahn–Teller distortions associated with Mn and buffers volume changes during cycling. This structural synergy results in excellent temperature stability across a wide temperature range (−20 to 55 °C). 18650-type cylindrical cells based on CuHCF-3 with high loading density achieve 73.54% capacity retention over 850 cycles. This study offers valuable insights for designing durable, high-capacity electrode materials for SIB energy storage applications.
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PubMed
高影响因子
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