MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Zhongqiu Zhao,Zixuan Zhou,Lei Wang,Ying Zhang,Yaguang Sun,Mingchang Zhu,Shuangyan Wu
Riboflavin was first isolated from milk and widely used in food, biological and pharmaceutical fields. Accurate detection of riboflavin content is of great significance for the treatment of related diseases and the supervision of food/drug quality. In this paper, a 1D chain copper-based coordination polymer with excellent water stability was synthesized by hydrothermal method using rigid ligand 1,10-phenanthroline and flexible ligand 1,4-phenylenedioxydiacetic acid, named Cu-phen-PEDA. Based on the Förster resonance energy transfer (FRET) and dynamic quenching detection mechanism, the emission spectrum of Cu-phen-PEDA overlaps with the absorption spectrum of riboflavin. As an energy donor in this case, Cu-phen-PEDA significantly increases the fluorescence intensity of riboflavin (energy acceptor), while simultaneously decreasing its own fluorescence intensity, which is an effective proportional-building strategy. In the lower concentration range, riboflavin can be specifically recognized by ratiometric fluorescence with a good linear relationship, and the detection limit is as low as 23 nM. The potential aspects of its specificity, stability, reusability and practical application were explored.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
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IF 15.7
Zhao Xin,Li Changzhi,Wen Jie,Qiang Qian,Shen Zirong,Yu Haipeng,Zhou Xin,Yue Fengxia,Fang Ruiqi,Li Yingwei,Zhang Tao
Lignin refining still suffers from great challenges of selective depolymerization and cleavage of stubborn C‒C linkages. Here, a robust atomically dispersed Cu/Ni-SA@HNC catalyst is fabricated for super-selective hydrogenolysis of lignin and model compounds via an unusual “preferential C α –C β bond cleavage in β-O-4 linkages” pathway, affording toluene in yield up to 75.7% from β-O-4 model compounds, and up to 33.7 ± 1.6 wt% (nine parallel experiments) from poplar lignin. The catalyst exhibits high stability, and the scale-up potential is demonstrated by the high space-time yield of toluene (33.7 g·g cat −1 ·h −1 ) in continuous flow reaction of β-O-4 model compound. The origin of the extraordinary selectivity towards C α –C β bond cleavage rather than C‒O bond cleavage in β-O-4 model compounds is uncovered. This work conquers the major challenges in lignin valorization by using non-noble dual-metal single-atom catalyst, not only showcasing the application perspective of atomically dispersed catalysts in biopolymer refinery, but also providing a cost-efficient, petroleum independent solution to valuable commodity chemicals.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Mengyao Shi,Qiang Yin,Da Wang,Chengcheng Tian,Lei Zhou
The widespread presence of Cu(II) in aquatic environment has attracked increasing interests in Cu(II)-mediated advanced oxidation processes (AOPs) as a promising “two-birds-one-stone” strategies for environmental remediation. Organically coordinated Cu(II) systems offer dual benefits on facilitating efficient copper redox cycling and generating reactive species for pollutant degradation. However, the activation efficiency disparities among different peroxides and their underlying mechanisms remain poorly understood. Herein, this study presents a comprehensive comparison of organically-cooridinated Cu(II) activated peroxydisulfate (PDS), peroxymonosulfate (PMS) and hydrogen peroxide (H 2 O 2 ) systems, where ofloxacin (OFX) serving as coordinating ligand and target contaminant. Our results demonstrate enhanced activation for all the three peroxides, leading to significantly improved OFX degradation. High-valent copper species Cu(III) is identified as the primary working intermediate across all systems. The peroxides activation efficiency, OFX decay enhancement, and steady-state Cu(III) concentration consistently followed an order of PDS > H 2 O 2 > PMS. The performance differences among the three systems were governed by the initial contact probability between peroxides and copper center and the subsequent electron transfer efficiency, which is further verified by molecular dynamics (MD) simulations. This work establishes a quantitative framework for predicting peroxides activation properties in Cu(II)-mediated AOPs, offering fundamental insights for designing efficient dual-functional systems that combine heavy metal stabilization with organic pollutant degradation in wastewater treatment.
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ACS Catalysis
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2025
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IF 13.1
Guihua Yan,Paulina Pršlja,Gaofeng Chen,Jiahui Kang,Yongde Liu,Miguel A. Caro,Xi Chen,Xianhai Zeng,Bo Peng
Syngas conversion into higher alcohols represents a promising avenue for transforming coal or biomass into liquid fuels. However, the commercialization of this process has been hindered by the high cost, low activity, and inadequate C2+OH selectivity of the catalysts. Herein, we have developed Cu/Co carbon wood catalysts, offering a cost-effective and stable alternative with superior selectivity for catalytic conversion. The formation of Cu/Co nanoparticles was found, influenced by water-1,2-propylene glycol ratios in the solution, resulting in bidisperse nanoparticles. The Cu/Co-CW-W1P1 catalyst (the ratio between water and 1,2-propanediol is 0.5:0.5) exhibited a remarkable CO conversion rate of 74.8% and a selectivity of 58.7% for C2+OH, primarily comprising linear primary alcohols. This catalyst demonstrated enduring stability and selectivity under industrial conditions, maintaining its efficacy for up to 350 h of operation. We also employed density functional theory (DFT) to analyze selectivity, particularly focusing on the binding strength of CO, a crucial intermediate for subsequent reactions leading to the formation of alcohols. DFT identified the pathway of CHx and CO coupling, ultimately yielding C2H5OH. This computational understanding, coupled with the high performance of the Cu/Co-carbon wood catalyst, paves the way to develop catalytically selective materials tailored for higher alcohol production from a nature-based source.
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Materials
·
2025
·Vol. 18
·期 10
·2315
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IF 3.2
Songya Feng,Anxin Gao,Zihang Ma,Hongjie Xu,Zhiyong Xue
The general polyol methods used for synthesizing copper nanoparticles (CuNPs) usually require high temperatures to ignite the reduction reaction, which leads to the difficulty of controlling the particle size. Herein, a new polyol method for the size-controllable synthesis of CuNPs at low temperatures by adopting high-pressure hydrogen as the reductant is verified. It is proven that hydrogen is capable to reductively produce CuNPs at temperatures as low as 120 °C. The size of the CuNPs can be controlled between 19.29 nm and 140.46 nm by adjusting the hydrogen pressure, the reaction temperature, and duration. An empirical relationship between temperature and particle size is proposed. This work verifies a low-temperature strategy to synthesize nanoparticles with good size-controllability.
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PubMed
高影响因子
CRYSTENGCOMM
·
2025
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IF 2.6
Xinyu Wang,Juan Xu,Ying Li,Yuhao Zhang,Xin Wu,Caixia Kan
Cu nanowires (NWs) have been a research hotspot in the field of metal NWs because of their excellent electrical conductivity, optoelectronic properties, mechanical properties and low price. However, the instability of Cu NWs leads to the loss of conductivity, which largely limits their application in optoelectronic functional devices. Here, we propose an aqueous-phase synthesis method for the direct synthesis of Cu@Au composite NWs. Cu@Au NWs/Poly (ethylene terephthalate) (PET) flexible transparent conductive films (FTCFs) were prepared through vacuum filtration of Cu@Au NWs. The stability tests of Cu@Au NWs/PET FTCFs were performed, and the results showed that the resistance of the Cu@Au NWs/PET films remained stable within 60 days, which was much better than that of the Cu NWs/PET FTCFs. The conductivity and transmittance of the Cu@Au NWs/PET FTCFs remained high stability after 10,000 bending cycles. To expand the applicability of Cu@Au NWs/PET films in electromagnetic shielding, the softer Cu@Au NWs/Poly (L-lactic acid) (PLLA) FTCFs were prepared via spin-coating process, and the film with a square resistance of 5 Ω/sq displayed excellent electromagnetic shielding performance with an electromagnetic shielding efficiency value of up to 32 dB in the X-band.
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ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Xujian Yang,Gao He,Jiarui Wang,Jilin Zhong,Yu Luo,Feng Jiang,Lile Dong,Xiang Li
To overcome the efficiency limitations of cuproptosis in oncology, we engineered a piezoelectric Cu-loaded Bi4Ti3O12 nanosheet system for synergistic cuproptosis and ROS-mediated tumor therapy. The incorporation of Cu2+ not only enhanced the material’s piezoelectric coefficient (d33 = 22.3 pm·V–1) but also facilitated valence-state modulation under ultrasound (US) stimulation. The resulting piezoelectric field significantly promoted charge separation, accelerating Cu2+/Cu+ conversion and boosting reactive oxygen species (ROS) generation. This strategy synergistically induces tumor cell death through a dual tumoricidal pathway: on one hand, the accumulation of Cu+ under US stimulation further amplifies cuproptosis, and on the other hand, the continuous accumulation of ROS triggers excessive oxidative stress. In a murine breast cancer model, this synergistic approach achieved a 90.6% tumor inhibition rate. This study pioneeringly combines piezoelectric material properties and copper valence transformation, providing insights for breast cancer treatment.
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PubMed
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CRYSTAL GROWTH & DESIGN
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2025
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IF 3.4
Bo Shen,Zhengqiu Chen,Junyu Chen,Ning Wang,Huaming Mao,Jungang Yin,Yu Ren,Wei Dai,Shuanglong Zhao,Hongwei Yang
The high dependence of the photovoltaic industry on the precious metal Ag has exacerbated its resource shortage and cost pressure, and there is an urgent need to develop low-cost, Cu-based alternative materials. In this study, the construction of a Cu@Ag core–shell structure is realized through the interface regulation strategy driven by glutamic acid (Glu) coordination, which effectively synergizes the high electrical conductivity of Cu and the antioxidant advantages of Ag. Combined with molecular dynamics simulation and electrochemical analysis, the three-stage process of adsorption–displacement–reduction of Ag layer growth is revealed. On the basis of this, according to the differences in the surface interface properties of different dimensional Cu-based materials, the “high-activity edge-selective passivation” (2D) and “dual-complexant gradient adjustment” (3D) strategies are adopted to optimize the coating path of the silver layer, so as to realize the multidimensional Cu@Ag core–shell structures. Finally, material performance characterization shows that the multidimensional Cu@Ag core–shell structure can significantly inhibit the oxidation of Cu nuclei. This study provides a new solution for the design of low-cost and high-performance materials in the fields of photovoltaic conductive pastes and flexible electronics as well as a new idea for interfacial engineering and large-scale preparation of multidimensional heterostructures.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
He Zhang,Zhanxiang Yin,Yaqiang Wang,Yi Wu,Youbo Xing,Xin Guo
Low carrier concentration and mobility have been the primary obstructions to improving the electrical transport properties of BiCuSeO thermoelectric oxides , particularly for excessively low carrier mobility , heavily impeding the development of its thermoelectric performance. Herein, high-pressure technology is adopted to tune the electronic structure motivating carrier mobility , incorporated with the contribution of Cu deficiency to carrier concentration, achieving high carrier mobility of 25 cm 2 V −1 s −1 and outstanding electrical conductivity of 2834.57 Sm −1 . Moreover, high densities of grain boundaries and dislocations are introduced by high pressure, accompanied by the effect of Cu vacancies, suppressing phonon transport and depressing lattice thermal conductivity , finally realizing an acceptable zT of 0.56 at 823 K in BiCu 0.97 SeO. This work demonstrates that high pressure can be compatible with other methods, realizing synergetic optimizations in coupled parameters and thus improving thermoelectric performance in BiCuSeO oxides.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Peibo Li,Guoqiang Luo,Guinan Zhao,Huawu Liu,Yi Sun,Qiang Shen
Al powder is prone to oxidation, which can introduce impurities in powder metallurgy. In this study, Al 2 O 3 nanonetworks were obtained by destroying the oxide layer through Paulse Activated Sintering (PAS). The network and the nano-precipitation enhance the mechanical properties of Al-Cu-O composites. TEM analysis revealed the formation of CuAl 2 and an Al 2 O 3 network at the grain boundaries. The current facilitated the modulation of the intermetallic compound size and the fragmentation of the oxide layer. The current-induced discharge at the particle interfaces generated localized heating. Higher temperature effectively disrupts the oxide layer. The Al 2 O 3 network improved the fracture toughness of the Al-Cu-O composites by passivating crack propagation. Simultaneously, the current reduced the nucleation barrier for precipitation by promoting directional atomic migration. Uniformly dispersed nano-precipitates are conducive to the improvement of strength. This study provides new insights into oxidation-related challenges in Al powder.
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ChemCatChem
·
2025
·
IF 3.9
Minglu Zhu,Yuyin Wang,Minghao Du,Xing Zhang,Haoyu Liu,Zhihua Qiao,Juanjuan Yang,Bo Peng,Lei Nie,Zhenglong Li
The catalytic conversion of bio-ethanol to butanol is a pivotal reaction for producing renewable fuels and chemicals from non-edible biomass. Developing non-noble metal-based catalysts that exhibit high activity and stability is of great importance, yet remains a substantial challenge. Herein, Cu/LDH catalyst (Cu supported on MgAl layered double hydroxide), was synthesized via simple impregnation without further calcination, and demonstrated for the activity enhancement of ethanol-to-butanol reaction with superior conversion/yield than previous reports of LDH-derived materials. The catalytic activity of Cu/LDH-150(Red) catalyst is attributed to the interaction between Cu and LDH, induced by the pre-reduction during synthesis. It has been further revealed that the Cu species provides redox sites for dehydrogenation/hydrogenation reactions, promoting the critical initial reaction step ethanol dehydrogenation to acetaldehyde. And pre-reduction of Cu/LDH catalyst facilitates the reduction of Cu 2+ to Cu 0 /Cu + and promotes the incorporation of Cu into the interlayer of LDH, as evidenced by XPS and mechanistic validation with acetaldehyde feed, responsible for the activity enhancement. Graphical A non-noble Cu/MgAl-LDH catalyst, synthesized via simple impregnation without calcination, efficiently converts bio-ethanol to butanol. Pre-reduction enhances activity by generating Cu 0 /Cu + species and structural integration, providing redox sites for key ethanol dehydrogenation to acetaldehyde. This design offers a high-performance, stable catalyst for renewable fuels.
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JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Zhao Hengyu,Wang Baoyu,Yang Shiqing,Zhu Huamiao,Zhang Zihao,Li Wenyao,Yang Xiangmin,Fang Bin,Liang Ying,Zhang Zhen
As conductive fillers, the uniformity and compactness of composite metal powders are crucial for preparing high-performance conductive pastes. In this study, a self-circulating electroplating method was proposed, which could efficiently deposit Sn plating on the seed of Cu micro-flakes to prepare composite metal powders. The effects of total electroplating time, single electroplating time, loading mass of Cu seeds on the cathode support, and the bath temperature on Sn plating layer have been systematically investigated and optimized. And the influence mechanisms of electroplating parameters on coating coverage, compactness, and uniformity of Sn plating layer were proposed. The Sn-coated Cu micro-flakes with compact plating layer of 142.9 nm thickness were obtained with the total electroplating time of 60 min, the single electroplating time of 3 min, and the loading mass of Cu seeds of 18 mg/cm 2 at the bath temperature of 15 °C. Finally, the as-prepared Sn-coated Cu micro-flakes were used as fillers to prepare conductive pastes, which exhibited good antioxidation performance at 85℃ and 85%R.H. Graphical abstract
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