ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Yu Duan,Zihan Ma,Jiaxuan He,Yingying Huang,Shuo Bao,Jinlin Lu
P2-type layered cathode materials have low energy density due to low initial Na content. In this research, high sodium content P2-type cathode material Na0.8Li0.08Ni0.23Mn0.67Cu0.1O1.92F0.08 (NMC-LF), was synthesized by a simple high-temperature solid-phase method. The strong electronegativity of F allows the local TM-O bond to be transformed into a TM-F bond, and the TMO6 octahedron becomes more stable. The doping of Li+ not only maintains structural stability but also transforms the two-phase reaction in the high-voltage range into a solid-solution reaction. This leads to an effective suppression of the irreversible P2–O2 phase transition in the high-voltage region. At 20 mA·g–1, the initial discharge capacity of NMC-LF reaches 131.05 mAh·g–1. At a high current density of 200 mA·g–1, the discharge capacity reaches 101.9 mAh·g–1 and remains at 99.31% after 150 cycles. The diffusion coefficient of NMC-LF is as high as 8.67 × 10–13 cm2·s–1. Furthermore, the structural evolution during material formation is elaborated by high-temperature XRD, and it is determined that there are no impurities at 900 °C. Under the joint synergy of Li/F/Cu and the design of high sodium content, the long-cyclic and high-rate performance has been significantly improved. In-situ XRD tests show that Li/F/Cu codoping inhibits the P2–O2 phase transition and enhances structural reversibility. This provides a new idea for the research of layered cathode materials.
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiaobo Min,Han Lu,Yun Li,Changhao He,Yiwei Deng,Yunyan Wang,Cong Peng,Yong Ke,Yanfa Hu,Zhidong Xi,Liyuan Chai
Copper slag cleaning has always been critical for ensuring an efficient copper recovery in copper smelting system. However, current cleaning methods focus on copper enrichment, regardless of zinc and lead recovery. In order to address the severe resource wastage of lead‑zinc values in copper smelting slag, this study proposed an innovative copper slag cleaning technique for efficient and in-situ synergistic sulfidation recovery of Cu, Pb and Zn, and investigated the sulfidation mechanisms. A systematic characterization of copper slag was conducted and revealed that Zn 2 SiO 4 and PbSiO 3 are two of the main occurrence phases lost in slag, respectively, and they are the most difficult phases to recovery. Furthermore, thermodynamic, thermogravimetric analysis and experimental results regarding Zn 2 SiO 4 and PbSiO 3 in-situ synergistic sulfidation by CaSO 4 gypsum residue revealed that PbSiO 3 sulfidation mechanism progressed via CaSO 4 → CaS conversion, followed by diffusion of molten PbSiO 3 to CaS particle surfaces where Pb S bonding produced PbS shells. At the same time, Zn 2 SiO 4 involves calcium-promoted decomposition into ZnO and SiO 2 , and subsequent ZnO-CaS interfacial reaction producing ZnS and CaO. In addition, pilot experiments were conducted to detect the feasibility and stability of the proposed technique. Optimal conditions (12.02% sulfurizing agent dosage, 1 °C/min slow cooling) were determined and achieved comprehensive sulfidation rates of 88.55% Cu, 66.26% Pb, and 59.24% Zn, with effective enrichment as matte. Lead‑zinc sulfides attained flotation-required particle sizes (>40 μm) while residual phases showed minimal metal contents. This study addresses the challenge of lead‑zinc resource wastage in copper slag, introducing a novel approach and methodology for its resource utilization.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Yunfei Shen,Yi Liu,Kaisheng Sun,Tiantian Gu,Gang Wang,Yue Yang,Jianxiang Pang,Yang Zheng,Xiaodong Yang,Long Chen
Dendrites growth, chemical corrosion, and hydrogen evolution reaction (HER) on zinc anodes are the main barriers for the development of aqueous zinc-ion batteries (AZIBs). Constructing interfacial protective layer is an effective way to alleviate the side reactions on the anodes. Herein, Cu/Ti 3 C 2 Cl 2 MXene (CMX) with high zincophilic and hydrophobic property is prepared by the lewis molten salts etching method, and the CMX interface protection layer is constructed by a simple spin coating. The CMX coating layer can provide abundant nucleation sites and uniformize the charge distribution through the zincophilic Ti 3 C 2 Cl 2 MXene matrix, leading to homogenous Zn deposition. In addition, the hydrophobic coating contained anti-corrosive Cu nanoparticles can prevent the Zn anode from the electrolyte, beneficial for suppressing the chemical corrosion and HER. Therefore, the stable and reversible Zn plating/stripping is achieved for the Zn anode coated by the CMX, which exhibits the lifespan of over 1400 h at 0.5 mA cm −2 , and even can steadily run for 700 h with 65 mV at 10 mA cm −2 . Furthermore, CMX@Zn shows a high coulombic efficiency of over 100% for 3800 cycles, which indicates that the CMX@Zn electrode has excellent stability and reversibility of Zn stripping/plating. The full batteries assembled with ZnCoMnO/C (ZCM) cathodes also exhibits higher capacity (450.6 mAh g −1 at 0.1 A g −1 ) and cycle stability (capacity retention of 70% after 1500 cycles). This work enhanced the lifespan of AZIBs and broaden the research of multifunctional coating layer to other secondary batteries based on metal anodes.
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高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2024
·
IF 5.4
Qianying Jia,Qinggong Jia,Shijie Zhu,Yufeng Zheng,Shaokang Guan
In the cardiovascular field, coating containing copper used to catalyze NO (nitric oxide) production on non-degradable metal surfaces have shown unparalleled expected performance, but there are few studies on biodegradable metal surfaces. Magnesium-based biodegradable metals have been applied in cardiovascular field in large-scale because of their excellent properties. In this study, the coating of copper loaded in silk fibroin is fabricated on biodegradable ZE21B alloy. Importantly, the different content of copper is set to investigate the effects of on the degradation performance and cell behavior of magnesium alloy. Through electrochemical and immersion experiments, it is found that high content of copper will accelerate the corrosion of magnesium alloy. The reason is the spontaneous micro-batteries between copper and magnesium with the different standard electrode potentials, that is, the galvanic corrosion accelerates the corrosion of magnesium alloy. Moreover, the coating formed through silk fibroin by the right amount copper not only have a protective effect on the ZE21B alloy substrate, but also promotes the adhesion and proliferation of endothelial cells in blood vessel micro-environment. The production of NO catalyzed by copper ions makes this trend more significant, and inhibits the excessive proliferation of smooth muscle cells. These findings can provide guidance for the amount of copper in the coating on the surface of biodegradable magnesium alloy used for cardiovascular stent purpose.
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DOI
PubMed
高影响因子
JOURNAL OF STRUCTURAL CHEMISTRY
·
2018
·Vol. 59
·期 3
·744-747
·
IF 0.521
Sun S.-W.,Wang G.-F.
The synthesis of a novel Cu(I) complex with V-shaped bidentate ligands {[Cu(BIPMO)]×[CuBr 2 ]} n where BIPMO = bis(4-(1 H -imidazol-1-yl)phenyl)methanone is reported. It is characterized by IR spectroscopy, elemental analysis, and single crystal X-ray diffraction. Copper(I) ions in the complex are in a distorted environment in which donor atoms are provided by the bromide anion and nitrogen atoms of BIPMO ligands, respectively. Infinite anion chains formed by CuX 4 (X = Br or N) polyhedra are linked by BIPMO ligands to give rise to layers. Furthermore, the layers are linked into 3D networks through weak intermolecular interactions.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Xin Yang,Guanbao Wei,Jihui Cao,Zhengxin Ding,Rusheng Yuan,Jinlin Long,Chao Xu
Electrochemical conversion of nitrate to valuable ammonia is a promising but challenging study of wastewater treatment and resource recovery. Herein, we reported an MXene-Cu lamellar electrified membrane with confined channels as a flow-through electrode for ammonia (NH3) synthesis by nitrate (NO3–) reduction. The introduction of Cu nanoparticles into Ti3C2Tx-stacked membranes could broaden their plane channels to improve the mass transfer while confining their permeability to achieve modulation of the water flux. By coordination of the catalytic capacity of Cu nanoparticles as well as the tunable water flux, the Ti3C2Tx-Cu flow-through membrane electrodes exhibited excellent electrocatalytic performance. Particularly, in a closed-cycle flow-through mode, the optimized Ti3C2Tx-Cu membranes were able to convert NO3– to NH3 efficiently, even at high feed concentrations. In addition, these membrane electrodes possessed not only excellent long-term durability but also resistance to organic dye contaminations due to their inherent rejection capability, which allowed them to maintain stable electrocatalytic properties in complex solutions. This work demonstrates that the use of MXene-based electrified membranes with confined channels as flow-through electrodes may be an alternative strategy to achieve sustainable NO3– decontamination and NH3 synthesis, which will conduce to the practical application of specific electrified membranes in the electrochemistry field.
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高影响因子
RSC Advances
·
2015
·Vol. 5
·期 91
·74575-74584
·
IF 3.84
Zhenzhen Wang,Shangru Zhai,Jialing Lv,Haixin Qi,Wei Zheng,Bin Zhai,Qingda An
A novel monodispersed hierarchical nanocomposite catalyst of Cu/Fe3O4 was successfully synthesized through a short-time (just 4 h), facile, eco-friendly one-pot hydrothermal method. The as-prepared Cu/Fe3O4 nanocomposite was well characterized and the results showed that the products were spherical in morphology with diameters of about 100 nm. The BET surface area of the nanospheres was 37.16 m2 g−1, indicating that the product showed a porous character, and the major BJH pore size was 3.73 nm. The saturated magnetization of the Cu/Fe3O4 nanospheres was 48.0 emu g−1, which facilitated their separation and recovery with the aid of an external magnet. In addition, the influences of experimental parameters such as the dosage of trisodium citrate dehydrate (Na3Cit) and urea as well as reaction duration time were investigated in detail to fully elucidate the formation mechanism. More charmingly, the Cu/Fe3O4 nanocomposites exhibited excellent catalytic activity towards the reduction of hazardous organic dyes (4-nitrophenol, 4-NP; congo red, CR; methylene blue, MB) in aqueous media in the presence of NaBH4 with very fast kinetics and good stability. The relationship between the Cu precursor addition amount and catalytic ability was also established. Considering the simplicity of the operation procedure, short time, low cost as well as easy recycling of the catalyst, this preparation protocol may shed light on the fabrication of other metal oxide materials; and hopefully, this hierarchical nanocomposite may find potential applications in other domains like heavy metal removal or antibacterial applications.
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高影响因子
Molecular Catalysis
·
2017
·
IF 0
Hao Chen,Houhang Ruan,Xilei Lu,Jie Fu,Timothy Langrish,Xiuyang Lu
Catalytic transfer hydrogenation of furfural to furfuryl alcohol is considered to be a very important industrial process. In this work, non-noble Cu supported on MgO-Al 2 O 3 catalysts have been prepared by co-precipitation and have shown excellent catalytic performance for conversion of furfural to furfuryl alcohol in near-critical iso-propanol. The effects of the Cu state (reduction degree and dispersion) and loading in Cu/MgO-Al 2 O 3 , acidity of catalysts have been investigated by X-ray diffraction (XRD), coupled plasma optical emission spectrometry (ICP-OES), N 2 adsorption and desorption (N 2 -BET) and temperature-programmed desorption of ammonia (NH 3 -TPD), which have led to high activity for producing furfuryl alcohol. The results have shown that the selectivity of furfuryl alcohol has been influenced by the Cu state, Lewis acidity, reaction temperature and reaction time. The mechanisms, Lewis acid- and metal mediated hydrogenation, have shown that a desirable balance of Cu loading and Lewis acidity of catalyst has influenced the activity significantly. Almost 100% furfural conversion, with 89.3% furfuryl alcohol yield has been obtained. Cycling tests have shown that the prepared catalysts have been stable, where recycling the catalysts at least four times has not shown any reduction in activity.
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DOI
Journal of Materials Chemistry C
·
2013
·Vol. 1
·期 10
·2014-2020
·
IF 0
Wei-Dong Xiang,Hai-Long Yang,Xiao-Juan Liang,Jia-Song Zhong,Jing Wang,Le Luo,Cui-Ping Xie
We report the direct synthesis of highly luminescent Cu–Zn–In–S (CZIS) quaternary nanocrystals (NCs) in the non-coordinating solvent 1-octadecene (ODE) using chloride salts of Cu, In, and Zn as metal precursors in the presence of oleic acid and dodecanethiol. The resulting CZIS NCs had a narrow size distribution with an average diameter of 2.5 nm. The photoluminescence spectra can be tuned from 400 nm–850 nm by varying the Cu : Zn precursor ratio, and a relatively high photoluminescence quantum yield (PL QY) of 46% was obtained without any post-processing. The PL decay times of the as-prepared CZIS NCs were tunable via controlling the Cu : Zn precursor ratio and reaction time. The photoluminescence mechanism of the CZIS nanocrystals was discussed using the PL decay curves. EDS analysis revealed that the resulting CZIS NCs were Cu-deficient, and the internal defect-related emission process could be strongly promoted by the large Cu deficiency which is associated with the improvement of PL QY.
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ACS ES&T Engineering
·
2022
·
IF 0
Shuqian Dong,Xu Chen,Linfeng Su,Yingjie Wen,Yuechu Wang,Qihao Yang,Li Yi,Wenwen Xu,Qiu Yang,Peilei He,Yunqing Zhu,Zhiyi Lu
Photo-Fenton degradation as a promising strategy for antibiotic wastewater treatment attracted extensive attention, while the unsatisfactory catalytic performance vitally limits its industrial application. Herein, we demonstrate that confining atomically dispersed Cu into C3N4 (Cu–C3N4) enables fast H2O2 activation and efficient separation of photogenerated electron–hole pairs, resulting in a dramatic improvement of the degradation efficiency of the Photo-Fenton reaction. Photo-Fenton degradation of ciprofloxacin (CIP) was close to 99% within 30 min over optimized Cu–C3N4, corresponding to a pseudo-first-order rate constant of ∼0.0978 min–1, almost 4.5 times higher than pure C3N4 counterpart. The electron paramagnetic resonance, quenching experiments, and X-ray absorption fine structure results reveal that the superior Photo-Fenton catalytic performance is attributed to a nonradical reaction pathway, where the H2O2 is activated by the formation of the O═Cu–N4═O intermediate. The advanced catalyst as well as the refreshing H2O2 activation mechanism are of profound significance for the materials design in the wastewater treatment field.
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BIORESOURCE TECHNOLOGY
·
2021
·
IF 9.642
Yue Han,Chao Liu,Xiangchen Kong,Xing Wang,Yuyang Fan,Ming Lei,Ming Li,Rui Xiao,Longlong Ma
In this study, two counterexamples of lignin preoxidation-hydroconversion were reported. First, two lignin feedstocks were preoxidized with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) in acetonitrile with various dosages (15%, 30%, and 60%). Then, these preoxidized lignins (HELOs and MWLOs) were hydroconverted in supercritical ethanol catalyzed by Cu/CuMgAlO x . Total yields from HELOs were all higher than those from HEL , indicating the good promotion of DDQ preoxidation on the subsequent hydroconversion of HELOs, especially with the DDQ dosage of 15%. Differently, the promotion effect of DDQ preoxidation on the hydroconversion of MWLOs depended on the DDQ dosage as well as the reaction time. Through the comparison of two counterexamples, this work bursted the myth that preoxidation can always promote the subsequent hydroconversion of lignin, revealed the influence of lignin property, preoxidation degree, and reaction conditions on the subsequent hydroconversion of preoxidized lignin, and presented the new insight into the preoxidation-hydroconversion strategy for lignin.
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PubMed
高影响因子
ACS Applied Energy Materials
·
2020
·
IF 4.473
Liting Cui,Zhengjian Li,Haining Wang,Lirui Cui,Jin Zhang,Shanfu Lu,Yan Xiang
It is of great significance to reduce the amount of platinum for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells. In this work, a copper single atom coordinated by nitrogen doped carbon nanotubes is employed as a support for the deposition of platinum nanoparticles (Pt/Cu-SAC), according to the prediction of the density functional theory calculation, which reveals the ORR activity of Pt/Cu-SAC should be improved in comparison to that of Pt/C due to the weaker adsorption of oxygen. The prepared Pt/Cu-SAC exhibits more promising ORR activity than the commercial Pt/C due to the synergetic effect of Cu-SAC on the Pt particles. Furthermore, the fuel cell based on Pt/Cu-SAC with a cathode Pt loading of 0.025 mg cm–2 exhibits a peak power density of 526 mW cm–2, which is quite similar to that obtained with the commercial Pt/C with a cathode Pt loading of 0.1 mg cm–2. The Pt/Cu-SAC paves the way to design low-Pt cathode catalysts for the polymer electrolyte membrane fuel cells.
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高影响因子
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