ACS Applied Nano Materials
·
2024
·
IF 5.3
Xupeng Zhang,Zhiping Xu,Kaiqian Li,Xianghong Li,Shuduan Deng,Ying Liu,Gang Zhu
Wood-based substrates decorated with metal–organic frameworks (MOFs) postcarboxylation have garnered significant attention for CO2 capture. However, the practical applicability of composites synthesized via this method is constrained by modification difficulty, low binding strength, and environmentally unfriendly processes. In this work, we introduce an innovative approach that involves the oxidation of hydroxyl groups on wood cellulose C2 and C3 to aldehyde groups, producing a dialdehyde wood sponge (DWS). Subsequently, Cu-BTC MOFs (HKUST-1) were grown in situ in the 3D framework of the wood sponge through chelation. This strategy enhances the affinity between the MOFs and the wood-derived skeleton, significantly increasing the micropore surface area to 402 m2/g, with the micropores primarily concentrated at 0.71 nm. Benefiting from its high MOF load and abundant microporous structure, HKUST-1/DWS achieved a CO2 capture capacity of 2.34 mmol/g (273 K, 1 bar), remarkably surpassing that of HKUST-1/TWS (carboxylated wood sponge by 2,2,6,6-tetramethylpiperidinooxy), which exhibited a capacity of 1.59 mmol/g. Additionally, the synthesized solid adsorbent demonstrated high CO2/N2 adsorption selectivity (47.95), indicating the potential for efficient CO2 separation. This method of constructing MOF/wood-based CO2 sorbents enables chemical modification and facilitates efficient and sustainable carbon dioxide capture.
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高影响因子
Nano Research
·
2023
·Vol. 17
·期 5
·4437-4443
·
IF 9.9
Zhong Junsen,Huang Bingkun,Yang Kunjie,Ma Zuju,Du Lingyu,Luo Ning,Tang Fengjiao,Hou Chuanxin,Jiang Fuyi,Kang Litao
The electrochromic (EC) mechanisms of inorganic materials are usually based on reversible cation insertion/extraction or metal deposition/dissolution, which are plagued by ion trapping and dendrite growth, respectively. In this paper, a novel conversion-type electrochromic mechanism is proposed, by making good use of the CuI/Cu redox couple. This CuI-based electrochromic system shows a neutral color switching from transparent and dim grey. By simply increasing the bleaching voltage, \({{\rm{I}}_3}^ - /{{\rm{I}}^ - }\) redox couple can be further activated. The generated \({{\rm{I}}_3}^ - \) will readily react with Cu, effectively improving the conversion reversibility and thereby rejuvenating the degraded electrochromic performance. Thanks to the well-designed electrode and the self-healing ability, this conversion electrochromic system achieves rapid response times ( t coloring : 23 s, t bleaching : 6 s), decant optical modulation amplitude (26.4%), high coloration efficiency (86.15 cm 2 ·C −1 ), admirable cyclic durability (without performance degradation after 480 cycles) and excellent optical memory ability (transmittance variation < 1% after 10 h open-circuit storage). The establishment of this conversion-type electrochromism may inspire the exploration of novel electrochromic materials and devices.
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高影响因子
Science China-Technological Sciences
·
2015
·Vol. 58
·期 5
·881-888
·
IF 1.192
Yang AiLing,Li ShunPin,Wang YuJin,Wang LeLe,Bao XiChang,Yang RenQiang
Ag@Cu 2 O core-shell metal-semiconductor nanoparticles (NPs) were prepared by using solution phase strategy. It was found that Ag@Cu 2 O core-shell NPs were easily converted to Ag@Cu bimetallic core-shell NPs with the help of surfactant PVP and excessive reducer ascorbic acid in air at room temperature, which is a unique phenomenon. Varying volumes of Ag colloidal solutions were added into the reaction mixtures containing fixed initial concentrations of Cu 2+ and PVP, Ag@Cu 2 O and Ag@Cu core-shell NPs with fixed core size but varying outer shell thicknesses could be obtained. The composites, structures, morphologies and extinction properties of Ag@Cu 2 O and Ag@Cu core-shell NPs were systematically characterized by XRD, TEM and extinction spectra. Both of these NPs show wide tunable optical properties. The extinction peaks could be shifted from 421 nm to 700 nm. FTIR results reveal that Cu + ions on the surface of Cu 2 O nanocrystalline coordinate with N and O atoms in PVP and further are reduced to metallic Cu by excessive ascorbic acid and then form a nucleation site on the surface of Cu 2 O nanocrystalline. PVP binds onto a different site to proceed with the reduction until all the Cu sources in Cu 2 O NPs are completely assumed. And the shell of Cu 2 O is converted to Cu shell. The synthesis approach in this paper is simple and also a promising reference for synthesizing other core-shell NPs. Ag@Cu 2 O NPs can be easily converted to Ag@Cu NPs in air at room temperature, which is promising to be used in electronic devices.
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高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Xuexian Wu,Shujing Chen,Danni Liu,Chunyi Ye,Fengzhan Si,Yan Zhang,Yang Yang,Jing-Li Luo,Xian-Zhu Fu
The current collector is a critical component of lithium-ion batteries (LIBs). Herein, copper-coated polymer films (P@Cu) with through-hole arrays are developed lightweight and flexible current collectors. The through-hole arrays are created by laser drilling the polyimide film substrate. P@Cu composite current collectors are fabricated by electroless Cu deposition on polyimide films with through-hole arrays, which form three-dimensional conductive paths . As the anode current collector for LIBs, P@Cu exhibit a total electrode mass-specific capacity that is 54.58 % higher than that of the commercial Cu foil. Due to the polyimide substrate, the tensile deformation of P@Cu is 6.69 % higher than that of the commercial Cu foil. After 30,000 bending cycles, the conductivity of P@Cu is only reduced by 3.39 %, while the commercial Cu foil current collectors have broken by this point. The P@Cu composite foils with through-hole arrays are high-performance lightweight and flexible current collectors for LIBs.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Mengmeng Yan,Kang Xu,Yu-Xin Chang,Zhi-Yu Xie,Sailong Xu
Environmentally friendly P2-type layered iron manganese oxides appear to be one of the most potential cathode materials for sodium-ion batteries (SIBs). However, their practical application is hindered by the unfavorable phase transitions, dissolution of transition metals, and poor air stability. One effective strategy by either single-cation doping or high-cost Li involved co-doping is used to alleviate the problems. Here, low-cost Cu/Ti co-doping is introduced to boost P2-Na 0.7 Cu 0.2 Fe 0.2 Mn 0.5 Ti 0.1 O 2 as an air and electrochemical stable cathode material for SIBs. The resulting electrode delivers an initial capacity of 130 mAh g −1 at 0.1C within 2.0–4.2 V, a reversible discharge capacity of 61.0 mAh g −1 at a high rate of 5C and a capacity retention ratio exceeding 71.1% after 300 cycles. In particular, the co-doped crystal structure is well-maintained after 1 month of exposure to air, and even 3 days of soaking in water. Furthermore, the enhancement is elucidated by the effectively mitigated P2–Z and the completely suppressed P2–P′2 phase transitions, the decreased volume variation proved by in-situ X-ray diffraction (XRD), as well as the lowered transition-metal dissolution evidenced by inductively coupled plasma optical emission spectrometer (ICP-OES) and X-ray photoelectron spectroscopy (XPS). The low-lost Cu/Ti doping strategy could thus be effective for designing and preparing environmentally friendly and high-performance cathode materials for SIBs.
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高影响因子
Catalysts
·
2026
·Vol. 16
·期 10
·919
·
IF 4.5
Guanghua Chen,Ning Cao,Zhonghao Deng,Xiangqing Zhang,Xiao Wang,Chong Peng,Liling Fang,Xusheng Ao,Shaobin Tan,Weibin Qiu
Nitrate, as a core component of water pollution, poses a severe threat to the ecological environment and human health. Electrochemical ammonia synthesis via nitrate reduction (NO3RR) is a highly promising sustainable technology, yet the simultaneous achievement of high activity and high selectivity remains a critical challenge in this field. Conventional Cu-based catalysts suffer from insufficient intrinsic activity and sluggish reaction kinetics. Moreover, the Cuδ+active sites are prone to valence evolution and structural reconstruction during electrocatalysis, making it difficult to meet the demands of long-term industrial-scale operation. To break through the aforementioned bottlenecks, this study proposes a rare-earth-regulated electronic structure engineering strategy. By constructing a Cu 3d–O 2p–La 4f gradient orbital coupling system, the surface chemisorption behavior of transition metals is precisely optimized, and the electron transfer pathway is efficiently modulated. The introduction of La not only strengthens electron delocalization and transport through the gradient orbital channel to enhance the adsorption and activation capability of NO3−, but also stabilizes the Cuδ+active sites via its unique 4f electronic structure, optimizes the adsorption energy of key intermediates, and synergistically boosts the catalytic performance. Experimental results demonstrate that the optimized La0.02-CuOxelectrode exhibits no obvious performance degradation after continuous operation for 30 h at a large current density of 2.5 A cm−2, delivering an ammonia yield of 186.99 mg·h−1·cm−2and a Faradaic efficiency of 94.39%. This rare-earth orbital coupling strategy provides a new research insight for the rational design of highly stable Cu-based NO3RR catalysts.
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高影响因子
JOURNAL OF CONTROLLED RELEASE
·
2026
·
IF 12.4
Sheng Zhao,Yongyi Qu,Wei Chen,Ruotong Li,Jing Zhu,Yunyun Wu,Lunli Xiang,Lin Li,Hongrui Zhu,Jixi Zhang
Nanocomposite hydrogel enables spatial redox compartmentalization. • Nanoparticle-released neocuproine hijacks endogenous Cu(I) pools. • Mitochondrial Cu(I) redistribution induces immunogenic cuproptosis. • Extracellular antioxidant components buffer ROS to preserve immunity. • Preoperative in situ vaccination elicits durable immune memory. Cuproptosis-based in situ tumor vaccination provides a unique opportunity to transform tumor destruction into systemic antitumor immunity. However, the oxidative stress required for efficient tumor killing simultaneously disrupts immune competence through copper toxicity and immunosuppressive remodeling. Herein, we develop a spatial redox compartmentalized nanocomposite hydrogel platform to resolve this paradox by selectively amplifying intracellular cuproptosis while preserving the extracellular immune niche. Following peritumoral co-injection of gallic acid-grafted chitosan (CS-GA), dopamine-grafted oxidized hyaluronic acid (OHA-DA), and neocuproine-caffeic acid (NCP-CA) nanoparticles, the hydrogel establishes distinct redox microdomains for tumor eradication and immune protection. Specifically, NCP selectively exploits endogenous exchangeable Cu(I) pools and redirects copper toward mitochondria, where copper valence transformation and ferredoxin 1-mediated activation induce dihydrolipoamide S -acetyltransferase oligomerization, mitochondrial proteotoxic stress, and cuproptotic immunogenic cell death. Meanwhile, CA treatment was associated with increased AMPK phosphorylation and a 63.5% reduction in PD-L1 expression. Simultaneously, catechol-mediated redox cycling by CS-GA&OHA-DA continuously scavenges extracellular reactive oxygen species, alleviating oxidative immunosuppression and restoring T-cell viability to 94.4%. After 14 days of treatment, a substantial tumor regression was observed with a tumor volume reduction exceeding 64.2%. In a contralateral tumor rechallenge model, enhanced infiltration of CD8 + T-cells (40.8%) and CD8 + T EM -cells (26.4%) contributed to 75.6% inhibition of tumor recurrence and 93.3% suppression of metastasis. By exploiting endogenous copper resources rather than exogenous copper supplementation and spatially decoupling tumoricidal oxidation from immune-protective antioxidation, this hydrogel platform establishes a new approach for cuproptosis-based in situ vaccination, inducing durable antitumor immune memory and effectively preventing postoperative tumor recurrence and metastasis. Download: Download high-res image (299KB) Download: Download full-size image
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yaxin Ru,Yajie Chen,Xinyan Yu,Qiuyu Zhang,Yuejia Yin,Guohui Tian
Hollow heterostructured catalysts have been widely investigated and applied in photocatalytic organic reactions. However, achieving hybrid catalysts with optimized hollow structure and controllable components is still a challenge. Herein, Cu-BTC@CuS@CeO 2 ternary heterostructure hollow octahedrons were designed and prepared using a copper-based metal–organic framework (Cu-BTC) as both copper source and template. A thin CeO 2 nanolayer was first formed and covered on the prepared Cu-BTC octahedron surface through a hydrothermal process. In the meanwhile, the Cu-BTC octahedrons were controllably etched in this hydrothermal process, leading to the formation of Cu-BTC@CeO 2 hollow octahedron. The following sulfidation reaction produced Cu-BTC@CuS@CeO 2 double p-n heterojunction hollow octahedrons. Benefiting from the novel hollow octahedron double p-n heterojunctions, excellent visible-near infrared light absorption, and fast charge transfer and separation, the obtained Cu-BTC@CuS@CeO 2 hollow octahedron hybrid catalyst exhibited a significantly higher photocatalytic activity toward the oxidative coupling of amines to imines at room temperature under visible-near infrared light irradiation compared to the control single component catalysts (Cu-BTC, CeO 2 , and CuS) and binary hybrid catalysts (Cu-BTC@CeO 2 , Cu-BTC@CuS, and CuS@CeO 2 ). The enhanced charge transfer at the double p-n heterojunction was discussed. Meanwhile, the photocatalytic oxidation products and reaction mechanism were investigated by surface-enhanced Raman spectroscopy, gas chromatography-mass spectrometry, and pyridine adsorption FT-IR spectroscopy. This work presents a promising strategy for the design of multi-component hollow heterostructure catalysts.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 35
·26114-26129
·
IF 4.4
Fan Yan,Sun Xueqin,Bi Tao,Hou Bo,Lu Fang
The accumulation of tetracycline antibiotics in water environments can lead to the emergence of antibiotic-resistant bacteria and resistance genes, posing a potential threat to ecosystems and human health. Therefore, the development of cost-effective and efficient methods for the remediation of antibiotic wastewater has become a current research hotspot. In this study, a novel photocatalyst, UiO-66-CA-Cu (CA was the abbreviation for “citric acid”), was prepared by two-step functionalization modification of the MOF material (University of Oslo-66, abbreviated as UiO-66). Under irradiation of simulated sunlight, UiO-66-CA-Cu-led photocatalysis and peroxymonosulfate (PMS) activation co-degradation system achieved 93.3% ( k = 0.04712 min −1 ) removal efficiency of tetracycline hydrochloride (20 mg/L, 50 mL) within 60 min. The functional modification was used to optimize the local environment of the parent MOF. The asymmetry of the Zr–O cluster structure introduced by CA could effectively improve the separation efficiency of photogenerated carrier in the material, and the introduced Cu 2+ ions could be used as the activation site to further enhance the material’s activation ability to PMS. Graphical In this work, a novel photocatalyst, UiO-66-CA-Cu (CA was the abbreviation for “citric acid”), was prepared by two-step functionalization modification of the MOF material (UiO-66). Under simulated sunlight irradiation, the degradation system constructed by the photocatalyst UiO-66-CA-Cu coupled with peroxymonosulfate (PMS) activation could achieve efficient removal of tetracycline hydrochloride (removal efficiency: 93.3%, k = 0.04712 min -1 ). In addition, we systematically investigated the effects of PMS concentration, photocatalyst concentration and initial pH value on the degradation performance over this system, and further proposed the possible degradation mechanism.
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产品关联
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高影响因子
Microsystems & Nanoengineering
·
2026
·Vol. 12
·期 1
·261
·
IF 11.1
Jiang Yimeng,Liang Misheng,Xie Ying,Su Ruige,Wang Bo,Wu Fan,Bian Xiaomeng,Tian He,You Rui
Recently, advances in human-machine interfaces have raised performance demands on flexible sensors. Achieving fast response, wide detection range, and high sensitivity remains a key challenge in flexible pressure sensor design. Here, we present a novel fully-porous flexible capacitive pressure sensor (FPFCPS) with a sandwich structure, comprising laser-induced Cu-composited graphene (LICuG) electrodes and a polyurethane foam dielectric layer modified with ionic liquid and coated with PVA hydrogel. The hierarchical porosity and conductivity of LICuG enable coupled mechanical interlocking and electronic polarization at the electrode-dielectric interface, improving interfacial contact, compressibility, and capacitive response. The sensor achieves a high sensitivity of 863.17 kPa⁻¹, a wide detection range (10 Pa–500 kPa), and a rapid response time of 5 ms, along with excellent flexibility and long-term stability. Notably, FPFCPS enables rapid tactile feedback and material recognition in dynamic robotic operations, offering high-resolution sensing in complex environments. This work represents the first application of LICuG in electric double-layer capacitance-pressure sensors and establishes a new structural design paradigm based on a fully porous architecture. It provides theoretical insights and practical strategies for advancing material development, mechanistic understanding, and implementation of intelligent sensing systems. In this study, femtosecond-laser-induced Cu-composited graphene (LICuG) was successfully synthesized. By incorporating this novel composite material into an electric double-layer capacitance sensing system, a fully-porous flexible capacitive pressure sensor (FPFCPS) was constructed. Through the synergistic regulation of the sensor’s interlayer structural and electrical properties, its overall performance was significantly enhanced. When integrated at key robotic joints, the FPFCPS successfully detected collisions within ~5 ms and was capable of identifying the type of obstacle through tactile contact.
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 19
·1481
·
IF 3.2
Zhang Xiaomin,Qin Mingjun,Tang Weilei,Pang Juan,Lyu Yue,Chen Cheng
Conductive adhesives (ECAs) are critical for advanced electronic packaging, but the high cost of silver fillers limits their widespread application. This study presents a hybrid filler strategy combining silver-coated copper (Ag@Cu) nanoparticles with a low content of silver flakes to achieve high electrical conductivity at reduced cost. The Ag@Cu particles were synthesized via a two-step wet chemical reduction method, yielding a well-defined core–shell structure with a dense silver coating that prevents copper oxidation. A series of ECAs were prepared with silver flakes and Ag@Cu nanoparticles at a fixed total filler loading of 70%. The results demonstrate that the optimal silver flake content is 4%, at which the ECA exhibits the lowest volume resistivity of 3 × 10⁻ 4 Ω·cm. The prominent conductivity improvement stems from synergistic geometric regulation. Low loading silver flakes serve as conductive bridges to fill interparticle gaps and construct hybrid point-to-face contact, verified by SEM. The silver flake composite retains favorable shear strength and thixotropy for screen printing. A circuit test with printed films lit an LED, validating its feasibility for flexible circuits. This work develops low cost, high-performance ECAs using Ag@Cu nanoparticles and silver flakes, achieving a balance between excellent conductivity and reduced material cost.
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高影响因子
JOURNAL OF POLYMER SCIENCE
·
2026
·
IF 3.9
Xingrong Liu,Fan Xia,Dietmar Auhl
In this study, a simple and environmentally benign method was developed to synthesize expanded graphite-polydopamine-copper (EG-PDA-Cu) hybrid nanoparticles. The procedure involved first modifying EG via a mussel-inspired technique to deposit a polydopamine coating, after which Cu 2+ ions were reduced to immobilize copper nanoparticles onto the EG-PDA substrate. The as-synthesized EG-PDA-Cu nanoparticles were subsequently blended into a silicone rubber matrix (VMQ) to form elastomeric composites. Owing to the synergistic contribution of Cu and EG, the 10 wt% EG-PDA-Cu/VMQ composite achieved a thermal conductivity of 1.375 W m −1 K −1 , representing a 7.63-fold enhancement over pristine VMQ (0.18 W m −1 K −1 ). Furthermore, the composites exhibited outstanding electromechanical and mechanical performance. This approach holds significant potential for fabricating high-thermal-conductivity dielectric materials suitable for thermal management in electronic packaging. Graphical In this work, a novel expanded graphite-supported nano-copper polydopamine composite was designed and synthesized. The procedure involved first modifying EG via a mussel-inspired technique to deposit a polydopamine coating, after which Cu 2+ ions were reduced to immobilize copper nanoparticles onto the EG-PDA substrate. This approach holds significant potential for fabricating high-thermal-conductivity dielectric materials suitable for thermal management in electronic packaging.
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高影响因子
危险品化学品经营许可证（带存储）