FUEL
·
2026
·
IF 7.5
Yang Gao,Yue Ma,Letong Yang,Xiaodong Wu,Rui Ran,Yanyang Yu,Duan Weng
Cu-SSZ-13, a Cu-exchanged zeolite, has been applied as a NO x selective catalytic reduction (SCR) catalyst for diesel aftertreatment, but improving its durability remains a challenge. To address this issue, a core–shell Cu-SSZ-13@SAPO-34 catalyst was prepared by a microwave-assisted hydrothermal method. The evolution of copper species and zeolite framework during high-temperature hydrothermal aging, potassium poisoning and sulfur poisoning, as well as the impacts on SCR performance, was explored. Cu 2+ ions detached by hydrothermal aging could migrate from the Cu-SSZ-13 core to the SAPO-34 shell and be reactivated, owing to the close interface contact between the zeolites. When exposed to chemical poisoning by K + and SO 2 , the SAPO-34 shell effectively shielded the Cu-SSZ-13 core. Thus, more active Cu 2+ ions could be preserved to maintain the SCR performance of the catalyst.
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高影响因子
ACS Nano
·
2026
·
IF 16
Minghao Jin,Muge Gu,Keyu Kong,Wenxuan Fan,Sonu Ng,Yuehao Hu,Zhe Wang,Jiemao Su,Wei-En Yuan,Huiwu Li,Zanjing Zhai
Prosthesis-associated osteolysis (PAO), driven by a self-perpetuating inflammatory-osteoclastogenic cycle, remains a critical challenge following arthroplasty. Current single-target therapies inadequately address the spatiotemporal heterogeneity of pathological microenvironments: ROS overload during the early immune activation phase and low pH in the osteoclastic resorption phase. This study develops bovine serum albumin (BSA)-coated copper–manganese carbonate nanocomposites (CuMnCO3@BSA, CMC) that dynamically coordinate immunosuppressive intervention with osteoclast-specific cuproptosis induction through microenvironment-guided functional switching. In vitro studies demonstrate that at neutral pH, Mn2+-mediated SOD/CAT-like nanozyme activity effectively scavenges ROS and reprograms macrophage metabolism to oxidative phosphorylation, thereby suppressing M1 polarization. During late osteoclast differentiation, acid-triggered carbonate decomposition releases Cu2+, selectively eliminating mature osteoclasts via cuproptosis-mediated mitochondrial lipoylated protein aggregation and TCA cycle collapse. In titanium particle-induced osteolysis models, this dual-functional CMC strategy demonstrates superior therapeutic efficacy to bisphosphonates. This study pioneers a microenvironment-adaptive nanotherapeutic approach, innovatively coupling cuproptosis with immune-metabolic regulation, thereby establishing a novel paradigm for osteolytic disease management.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xinglong Liang,Yutong Nong,Weigang Wang,Cheng Peng,Yi Tian,Jingyi Zhang,Xiaowei Wang,Jiuqing Liu,Xi Li,Jiafeng Zhang,Ji Liang
P2-type layered transition metal oxides (TMOs) are among the most promising cathode materials for sodium-ion batteries due to their high capacity and energy density. However, their practical application is hindered by irreversible phase transitions and lattice oxygen loss at high voltages, while Mn 3+ -induced Jahn–Teller distortion and P2–P′2 phase transitions at low voltages accelerate structural degradation and capacity fading. Here, we present a Mg/Cu co-doping strategy to systematically regulate structural evolution and redox chemistry, addressing these key degradation mechanisms. Mg 2+ , with strong electrostatic interactions and a small ionic radius, acts as an “anchoring” agent during deep sodiation (low potential), stabilizing the transition-metal layers, suppressing Mn disproportionation and Jahn–Teller distortion, and mitigating the P2–P′2 phase transition. Cu 2+ , in contrast, functions during deep desodiation (high potential) by enhancing Ni O bond ionicity and lowering the charge-transfer barrier between O 2p and transition-metal 3d orbitals, thereby reducing lattice oxygen participation, transition-metal dissolution, and interlayer gliding, and delaying the P2–O2 phase transition. Benefiting from this synergistic effect, Na 0.67 Ni 0.2 Mn 0.65 Mg 0.1 Cu 0.05 O 2 exhibits excellent electrochemical performance, retaining 80% of its capacity after 300 cycles at 1C in the 2.0–4.5 V window and maintaining a high reversible capacity of 78.5 mAh g −1 at 20C. This work not only provides a solution to the dual high-/low-voltage degradation challenge in P2-type TMOs but also elucidates the underlying mechanism of multi-element co-doping, offering a strategy for designing high-energy-density, long-life sodium-ion battery cathodes.
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高影响因子
RSC Advances
·
2015
·Vol. 5
·期 96
·79022-79030
·
IF 3.84
Lei Xu,Xiaoqiong Lu,Xiaomin Cheng
A series of novel cotton cellulose-graft-polycaprolactone copolymers with different grafting contents were successfully prepared via ring-opening polymerization (ROP) in an ionic liquid 1-N-butyl-3-methylimidazolium chloride ([Bmim]Cl). The structures of the grafting copolymers were systematically characterized by FTIR, CP/MAS13C-NMR, XRD, SEM and AFM, while thermal properties were investigated by DSC and TGA. Subsequently, Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich (D–R) adsorption isotherms were representative to simulate adsorption isotherms of Cu(II) and Ni(II) ions in aqueous solution. From the comparison of different adsorption isotherm models, it was found that adsorption of Cu(II) by modified cellulose followed Langmuir, Freundlich and Temkin models, while that of Ni(II) followed the Freundlich model. The results of adsorption indicated that the selectivity sequence of metal ions on graft copolymers was Cu(II) > Ni(II) and the maximum removal capacities of Cu(II) and Ni(II) ions were 98.7% and 35.6%, respectively. Hence, the graft copolymers exhibited significant potential to be an environmentally feasible biosorbent for removal of Cu(II) and Ni(II) ions from aqueous solution.
研究领域:
环境科学
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高分子化学
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材料科学
·
重金属去除
·
吸附技术
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高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 21
·6416-6426
·
IF 6.177
Binxiong Guang,Wei Zhang,Yiwei Zhang,Yahui Xiao,Yong Liu
A novel, efficient and economical process of cyclohexanol (CHOL) production based on cyclohexene esterification–hydrogenation has become a research hotspot in recent years. Wherein, hydrogenation of cyclohexyl acetate (CHA) derived from the esterification of cyclohexene with acetic acid is a crucial step. Combining the advantages of metal complexes and heterogeneous catalysts, the robust Cu(I) coordinated amino-functionalized poly(ionic liquid)s (PILs-Cu(I)) were, in this research, synthesized for use in the mild and highly selective hydrogenation of CHA to CHOL. The results of FT-IR, UV-vis, BET, XPS and SEM-EDS confirmed that the Cu(I) was dominant in the PILs-Cu(I), and was homogeneously and stably coordinated on the amino-functionalized poly(ionic liquid)s. Benefiting from that, the PILs-Cu(I) was endowed with an unprecedented performance in the mild and highly selective hydrogenation of CHA to CHOL. Specifically, 95.6% CHA conversion with 96.6% selectivity of CHOL, and 97.0% selectivity of ethanol was obtained under extremely mild conditions of 80 °C and 2 MPa H2. Furthermore, no significant activity loss was observed over the PILs-Cu(I) after recycling for at least five times, delivering excellent stability and reusability.
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高影响因子
Science China-Chemistry
·
2023
·Vol. 66
·期 3
·853-862
·
IF 9.6
Yang Lei,Liu Zenghe,Neisiany Rasoul Esmaeely,Lou Jiaming,Guo Yifan,Zhang Luzhi,Liu Huijie,Chen Shuo,Gu Shijia,You Zhengwei
It is exceedingly desired, but difficult to construct self-healing materials with both excellent mechanical properties and healing efficiency, which are usually realized by using mutually exclusive methods. Here, we reconcile this contradiction by utilizing copper-bis-(imidazole-2-yl)-methane-urea (Cu-BIMU) locked units based on novel designed dynamic imidazole-urea bonds with coupled multiple noncovalent bonds (coordination bonds, π − π stacking bonds, and hydrogen bonds). The coordination of Cu(II) greatly reduces the electron-cloud density of imidazole, which lowers the free energy barrier of imidazole-urea bonds and promotes their reversible dissociation, as demonstrated by the density functional theory and small-molecule model reaction. The topological design of Cu-BIMU polyurethane (Cu-BIMU-PU), which concentrates multiple crosslinking-in-one locked unit to avoid the formation of excessive crosslinking sites to ensure high chain mobility, facilitates self-healing. Accumulative extensive intermolecular interactions endowed excellent mechanical properties to the resulting Cu-BIMU-PU elastomer with a tensile strength of 65.3 MPa, among the highest ever-reported value. This work provides a novel molecular design principle for fabricating high-performance dynamic polymers.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Kun Hu,Qingjie Xie,Huijuan Wang,Bo Zhang,Yuyue Huang,Shilin Song,Huihui Zhang,Yixiao Ding,Hai Huang,Chundu Wu
In this paper, degradation of ciprofloxacin (CIP) in a circulating dielectric barrier discharge (DBD) plasma system with Cu-CeO 2 @CA composite films addition was investigated. The Cu-CeO 2 @CA films were synthesized through hydrothermal method, and the samples were characterized by SEM , XRD, EDS, FT-IR and Raman spectra analysis. The obtained results show that there was synergistic effect of the DBD plasma and the Cu-CeO 2 @CA films on the CIP degradation and mineralization. The optimal performance was obtained under the condition of 5 wt% Cu-CeO 2 nanoparticles doping in the composite film. Besides the effect of the DBD plasma, the Cu-CeO 2 @CA films could drive the O 3 decomposition, photocatalysis and then the more reactive oxygen species (ROS) formation. The presence of the main active species and their contributions to the CIP degradation were determined by electron spin resonance (ESR) analysis and radical quenching experiments. Methods of UV–vis spectrum, three-dimensional fluorescence spectrum and liquid chromatography mass spectrometry (LC-MS) were used to analyze the CIP decomposition process. The prepared Cu-CeO 2 @CA composite films had certain stability in the four cycles of application and the film catalyst was convenient for recycling. The toxicity evaluation results indicated the decline of the solution toxicity after treating in the Cu-CeO 2 @CA/DBD system.
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Rongxiu Guo,Xinyue Zhang,Ze-Nan Hu,Dun Niu,Xiaodong Li,Hongbin Sun,Qionglin Liang
As a typical 3d transition metal, Cu exhibits competitive potential in the catalytic transfer hydrogenation of nitriles due to its low price and appropriate catalytic activity . Unfortunately, the Cu-based catalyst usually requires additional metals to realize good catalytic activity, this makes it difficult to understand the role of Cu. Herein, an amino-modified hollow mesoporous double-shell SiO 2 @C (AmHMSiO 2 @C) microsphere was applied as a nanoreactor, which achieves the high selective hydrogenation of nitriles over the Cu-only catalyst. The conversion and selectivity to primary amines were 100% and 96% respectively at 60 °C using amino borane as the hydrogen source, and the TOF reaches 199.75 h −1 for Cu. The unique structure of the Cu@AmHMSiO 2 @C enhances the activity and stability of the Cu active sites. Comparative experiments demonstrate that the synergy between the nanoreactor and Cu nanoparticles enables the desirable catalytic performance toward the hydrogenation of nitriles to primary amines under mild reaction conditions. This work offers a distinct case for constructing an efficient Cu-based catalyst for heterogeneous hydrogenation reactions.
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2022
·
IF 4.383
Xiao-qi Chen,Zhi Huang,Yan-ying Liu,Qian Zhang,Jun-ming Hong
Conventional metal–organic frameworks (MOFs) used for electrocatalytic applications have the drawbacks of poor conductivity and instability. Herein, a Cu–1,2,3,4,5,6-benzenehexamine (Cu-HAB)/graphene oxide (GO) composite was prepared for the electrocatalytic degradation of tetracycline hydrochloride (TCH). Our characterization results show that Cu-HAB/GO has more active sites ( I D / I G = 1.0030), larger surface area (S BET = 395.3441 m 2 /g), and faster electron transport (Rct = 20.69) than Cu-HAB. Simultaneously, the improvement in the number of active sites, surface area and electron transport leads to a superior TCH electrocatalytic degradation efficiency. The reaction rate constant (0.70575 min −1 ) of the composite was higher with a 51.81% improvement observed when compared to Cu-HAB under the optimum conditions of 1 g/L NaCl, 20 mA, and 20 °C. In addition, 100% of the degradation efficiency was maintained after five cycles. A detailed study of the mechanism revealed that 1 O 2 and active chlorine were the critical active species for the degradation of TCH via quenching and electron paramagnetic resonance (EPR) studies. The possible TCH degradation pathway has been proposed. This study provides a novel and feasible method for the preparation of MOF-based electrocatalysts to expand their application to environmental fields.
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高影响因子
RSC Advances
·
2022
·Vol. 12
·期 51
·32898-32902
·
IF 4.036
Fanwei Meng,Guofang Ma,Jiahe Qiu,Zhendong Fu,Jiaqing Yan,Lingping Wang
Nanozyme is a material with enzyme-like catalytic activity, which has been widely used in environmental, antibacterial, and other fields of research. However, there are few reports on the toxicity of nanozymes. In this work, nanozymes co-assembled from sodium N-lauroyl sarcosinate (Ls) and Cu ions possess a Cu(I)–Cu(II) electron transfer system similar to that of natural laccases. Reaction kinetic studies show that the catalyst follows a typical Michaelis–Menten model. Cu–N-lauroyl sarcosinate nanozyme (Cu-Ls NZ) possess excellent laccase-like activity to oxidize a variety of phenol-containing substrates, such as phenol, 4-iodophenol, and 2,4,5-trichlorophenol. To evaluate the toxicity of the material, the nematode C. elegans was exposed to various concentrations of Cu-Ls NZ. Effects on physiological levels were determined. The results showed that high doses of Cu-Ls NZ increased the amount of reactive oxygen species (ROS), decreased the locomotor activity of nematodes, and inhibited their larval growth.
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PubMed
高影响因子
Materials Chemistry Frontiers
·
2022
·Vol. 7
·期 2
·315-324
·
IF 8.683
Weiye Guan,Yang Lv,Chao Ma,Qingxu Zhang,Aofei Wei,Xizheng Liu
A 3D porous current collector has been considered as an ideal host for a metallic lithium anode to address the challenges of volume expansion. However, lithium tends to deposit on the surface and plug the pores, leading to insufficient pore utilization, dendrite growth and battery safety concerns. Herein, a multi-gradient 3D current collector (MGC), comprising a lithiophilic gradient layer and a conductivity gradient layer, for highly reversible and dense lithium deposition is proposed. The bottom liquid metal (LM) layer serves as a lithiophilic gradient layer, inducing the deposition of lithium from the bottom layer and promotes the homogenization of the lithium flux. The MGC electrode exhibited a highly reversible lithium plating/stripping performance of over 2750 h at 1 mA h cm−2 and over 850 h at 5 mA h cm−2, with a pore utilization efficiency of 88.8% with no dendrite formation. The full cells coupled with LiFePO4 (LFP) cathodes were assembled and delivered an ultra-stable cycle performance of over 2000 times. This study provides a facile approach to achieve a stable current collector for a metallic lithium anode.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wei Yang,Mingli Cao
The removal of heavy metal ions from the aqueous environment is an important topic as heavy metal pollution is widely distributed in water bodies, causing serious damage to aquatic ecosystems and worsening the already scarce freshwater resources. In this work, we report the synthesis of novel ZIF-8@GO-COOH composite nanosorbent materials by in situ self-assembly. The physicochemical properties of the composites were investigated using relevant characterisation techniques, and the adsorption capacity of ZIF-8@GO-COOH for copper and lead ions in aqueous solution was tested by batch adsorption experiments. The adsorption behaviour was analysed by combining adsorption kinetics, adsorption isotherm model and Van't Hoff model. The results showed that the adsorption capacities of ZIF-8@GO-COOH for Cu(II) and Pb(II) were 93.26 mg/g and 95.875 mg/g, respectively, when the initial heavy metal ion concentration was 100 mg/L, the adsorption time was 60 min, the temperature was 293 K and the pH conditions were suitable. The high adsorption performance of ZIF-8@GO-COOH was attributed to its surface with abundant oxygen-containing functional groups and excellent specific surface area, which gives it a significant advantage in the removal of heavy metal ions from aqueous solutions.
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高影响因子
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