INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Shaohui Huang,Jin Li
In order to solve the problems of insufficiently rapid response and recovery and poor moisture resistance when zinc oxide is used as a gas sensitive material, a flexible frame material with hydrophobicity, ZIF-8, was introduced to modify the surface of ZnO, and then doped Ag nanoparticles, which can be electron sensitized with ammonia, to obtain Ag modified ZnO@ZIF-8 nanoparticles. At room temperature (RT, ∼25 °C), the response time of ZnO, ZnO@ZIF-8, and Ag modified ZnO@ZIF-8 nanoparticles to 500 ppm ammonia is 74.3 s, 20.2 s, and 8.0 s, and the recovery time is 36.0 s, 23.1 s, and 16.8 s, respectively. The fitting detection limit of Ag modified ZnO@ZIF-8 nanoparticles for ammonia was 83 ppm. Compared with pure ZnO, the moisture resistance of ZnO@ZIF-8 and Ag modified ZnO@ZIF-8 was significantly improved after coating with ZIF-8.
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MODERN PHYSICS LETTERS B
·
2025
·
IF 2.2
Jiamin Fang,Yuting Liu,Jing Sang,Hidetoshi Hirahara,Sumio Aisawa,Zhixin Kang,Wei Li,Dexin Chen
The application of conductive lubricants into the friction interface has emerged as a common and efficient approach to improve the current-carrying tribological behavior and wear characteristics on the metallic surface. This work incorporates 0.1 wt.% nano-sized Ag particles as conductive fillers in lubricant and investigates the current-carrying tribological behavior of silver-based composite coatings through reciprocating sliding friction experiments. The wear mechanisms of the composite coatings are analyzed under different conditions, including varying lubricants, high loads, and high currents. The experimental results indicate that under lubrication, wear characteristics are dominated by mechanical friction and wear, with arc erosion occurring when the current reaches 20 A. Furthermore, a wear severity progressively increases with higher currents when the load reaches 20 N. The introduced Ag particles effectively diminish contact resistance at the current-carrying friction interface, and mitigating the wear severity of composite coatings, the wear volume decreased by about 18.9% under the same conditions. The wear behavior exhibits distinct patterns depending on the applied load and current conditions. Analysis of the mechanical properties of subsurface and the chemical composition of wear tracks surface. The mechanical properties reveal that the maximum surface nanohardness reaches 2.1 GPa, while the maximum increase of subsurface nanohardness caused by current and load is 12.8% and 10.5%, respectively, and the degree of current-induced work hardening is more pronounced. Additionally, excessive loads and currents lead to interfacial heat generation, causing contact instability, friction pair separation, discharge events, and accelerated electrical damage and material transfer. The findings of this study provide important theoretical support and technical guidance for the surface protection of solid materials against current-carrying friction and wear in critical electrical equipment components.
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Materials Today Chemistry
·
2025
·
IF 6.7
Wenjie Wang,Shiyi Xing,Ping Lin,Lin Du,Qi Chen,Wei Sun
Ultrathin and lightweight electromagnetic interference (EMI) shielding materials tailored for microminiaturized electronic devices have become an urgent necessity. Porous polymeric composites incorporated with conductive fillers could be a promising candidate to meet such challenge. In the current study, pore-formation technique based on the inverse emulsion - breath figure process was utilized to shape highly porous polymeric coating with multi-layered arrays of micro-pores, uniformly embedded with Ti 3 C 2 T x MXene. By tuning the influential parameters, including MXene content, coating thickness, and pore sizes, an EMI shielding effectiveness value of 38 dB could be obtained from the composite coating. The 3D conductive pathways shaped by the Ti 3 C 2 T x flakes and the existence of the multiple interfaces within the multi-layered porous matrix of the polymer-MXene coatings (PMCs) were assumed to establish the fine EMI shielding performance. The PMC was further coated onto the circuit board and proven to function well as an ultra-thin EMI shielding layer attached to the microminiaturized electronic devices. In-situ metallic reduction induced by the MXene with inherent reducibility was utilized to further enrich the porous matrix of PMCs with Ag nanoparticles, generating Ag-decorated PMCs (Ag-PMCs). The fabricated Ag-PMC with thickness of only 240 μm demonstrated superior EMI shielding performance of an EMI SE value of 70.32 dB and a SSE/t value of 8775 dB cm 2 g −1 . This work sheds light on designing the ultrathin porous coating as EMI shielding materials for cutting-edge electronic devices.
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MACROMOLECULAR MATERIALS AND ENGINEERING
·
2026
·Vol. 311
·期 1
·e00371
·
IF 4.6
Xiaoyu Qian,Yuan Gao,Yurong Chen,Yaqi Zhang,Zhenxing Wang,Chunhui Lu,Minfeng Wu
With the growing demand for advanced biophysical signal monitoring systems, the development of stretchable, adaptable, and functional flexible materials has become essential. Flexible sensors capable of detecting facial expressions, voice signals, and environmental stimuli show great potential in personalized healthcare, human–machine interfaces, and wearable electronics. Despite advancements, current flexible sensors face limitations such as low sensitivity to micro-strains, insufficient anisotropy, and poor environmental adaptability, restricting their broader application. This study introduces a high-performance stretchable sensor composed of carbon nanotube (CNT) and silver (Ag)-based conductive inks integrated with a monodomain liquid crystal elastomer (LCE) substrate (Ag/CNT/LCE). The LCE substrate offers sensitive mir-costrains detection intrinsic anisotropy, and thermal-response capability. The conductive ink combines the mechanical robustness of CNTs with the excellent conductivity of Ag, suppressing CNT aggregation and improving electrical stability under strain. The Ag/CNT/LCE sensor exhibits a gauge factor of 3.93, rapid response times (120 ms), and exceptional cyclic durability over 2500 cycles. Additionally, its thermoresponsive behavior enhances adaptability to environmental changes. Demonstrated applications include facial emotion recognition, voice monitoring, and deformation-based environmental sensing. By integrating multifunctionality, structural durability, and dynamic adaptability, the Ag/CNT/LCE sensor serves as a promising platform for wearable electronics, and next-generation healthcare technologies.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.6
Ya Zou,Mei Chen,Qingzhi Liu,Kezhen Qi,Jieli He
This study reports the successful synthesis of graphitic carbon nitride quantum dots (g-C 3 N 4 QDs) that demonstrate remarkable fluorescence properties and excellent dispersion through a hydrothermal method. Leveraging the specific fluorescence quenching effect of ag + on g-C 3 N 4 QDs together with the strong chelating affinity of glutathione (GSH) for ag + , a novel “on–off–on” fluorescence sensing platform was developed to enable sequential and highly sensitive detection of both ag + and GSH. This probe exhibited outstanding sensitivity, anti-interference ability, and selectivity with detection limits of 0.0114 μM for ag + and 0.3916 μM for GSH. Mechanistic studies revealed that the fluorescence “off” state was mainly governed by a photoinduced electron-transfer (PET) effect, with additional contributions from the internal filtering effect (IFE). Conversely, the fluorescence “on” state was restored when GSH coordinated with ag + , thereby blocking the PET pathway and recovering the intrinsic fluorescence of g-C₃N₄ QDs. Furthermore, spiked-recovery experiments in real water and serum samples yielded satisfactory results, demonstrating the sensor's strong practical applicability and providing a reliable analytical approach for environmental monitoring and biomedical analysis
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Haoze Li,Liyan Shen,Kaifu Zhang,Bojing Sun,Liping Ren,Panzhe Qiao,Kai Pan,Lei Wang,Wei Zhou
Ag nanoparticle-decorated self-floating porous black TiO 2 foams (Ag-FBTFs) are fabricated by facile wet-impregnation and high-temperature surface hydrogenation strategy, utilizing self-floating porous black TiO 2 foams (FBTFs) with 3D macro-mesoporous architectures as hosts. The composites are evidently investigated by X-ray diffraction (XRD), Raman, N 2 adsorption, diffuse reflectance spectroscopy (DRS), transmission electron microscope (TEM), scanning electron microscopy (SEM), scanning Kelvin Probe (SKP), surface photovoltage spectroscopy (SPS) and photoluminescence (PL). The results show that the small Ag nanoparticles with diameter of 3–4 nm are decorated on the surface of FBTFs uniformly, which extend the photoresponse to visible-light region and show obvious surface plasmon resonance (SPR). The Ag-FBTFs exhibit excellent solar-driven photocatalytic performance for complete mineralization of some high-toxic organic contaminants. The enhancement can be attributed to the 3D macro-mesoporous networks facilitating the diffusion of reactants and products, the floating feature and small Ag nanoparticle-decoration favoring light-harvesting and spatial separation of photogenerated electron-hole pairs due to SPR effect. This novel SPR-enhanced solar-driven floating photocatalyst will have potential application in fields of natural environment.
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OPTICS AND LASER TECHNOLOGY
·
2024
·
IF 4.6
Shulei Li,Zhenxu Lin,Quantong Deng,Fu Deng,Mingcheng Panmai,Junying Chen,Yuheng Mao,Shimei Liu,Jun Dai,Yunbao Zheng,Rui Huang,Sheng Lan
Realization of long-term stable lasing from all-inorganic perovskite supercrystals is highly desirable for practical applications in optoelectronic devices. However, lasing from perovskite supercrystals excited by continuous wave laser light remains a challenge due to the photoluminescence degradation induced by thermal accumulation. Here, we report highly stable lasing with low threshold fom a CsPbClBr 2 supercrystal placed on a thin Ag film, which form a CsPbClBr 2 /Ag microcavity, by managing the thermal distribution inside the CsPbClBr 2 supercrystal. Combined numerical simulations and lifetime measurements, the localized electric field in such a hybrid microcavity leads to a spatially localized temperature distribution, which plays a crucial role in suppressing the thermal accumulation on the surface and in eliminating non-radiative recombination defects. The effective thermal management in the hybrid microcavity renders highly stable lasing with low threshold under the irradiation of continuouw wave laser light. Our findings provide a feasible and universal approach to the development of long-term stable perovskite laser.
研究领域:
光学工程
·
凝聚态物理
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材料科学
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纳米光子学
·
激光技术
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JOURNAL OF SOLID STATE CHEMISTRY
·
2011
·Vol. 184
·期 8
·2190-2195
·
IF 2.261
Shibin Sun,Xueting Chang,Lihua Dong,Yidong Zhang,Zhenjiang Li,Yanyan Qiu
A novel gas-sensing material and photocatalyst was successfully obtained by decorating Ag/AgCl nanoparticles on the W 18 O 49 nanorods through a clean photochemical route. The as-prepared samples were characterized using combined techniques of X-ray diffractometry, electron microscopy , energy dispersive X-ray spectrometry , and X-ray photoelectron spectroscopy. Gas-sensing measurements indicate that the Ag/AgCl/W 18 O 49 NRs sensors exhibit superior reducing gas-sensing properties to those of bare W 18 O 49 NRs, and they are highly selective and sensitive to NH 3 , acetone, and H 2 S with short response and recovery times. The Ag/AgCl/W 18 O 49 NRs photocatlysts also possess higher photocatalytic performance than bare W 18 O 49 NRs for degradation of methyl orange under simulated sunlight irradiation. Possible mechanisms concerning the enhancement of gas-sensing and photocatalytic activities of the Ag/AgCl/W 18 O 49 NRs composite were proposed.
研究领域:
材料科学
·
纳米技术
·
气体传感器
·
光催化
·
环境化学
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BIOMASS & BIOENERGY
·
2026
·
IF 7
Yahui Zhang,Haowen Cui,Haian Xia
The selective oxidation of furfural (FF) to 2-furoic acid (FA) represents a significant route toward sustainable chemical production. However, existing catalytic systems often suffer from limitations such as low substrate concentrations, harsh reaction conditions, and inadequate selectivity. In this study, a series of Ag/ZrO 2 catalysts with varying Ag loadings were prepared via a deposition–precipitation method and were used for the aerobic oxidation of FF to FA under mild conditions. The effects of metal loading, catalyst mass, reaction temperature, reaction time, and oxygen pressure on FF conversion and FA selectivity were systematically investigated. Under optimized conditions, nearly 100% FA was achieved under 10 wt% FF concentration at low-temperature (ca. 5 °C), while a high selectivity of 90.3% toward FA was maintained even at 20 wt% FF. The catalysts also exhibited excellent recyclability, retaining over 85% FA selectivity after five consecutive cycles. Comprehensive characterization techniques, including XRD, XPS, and HRTEM, were employed to elucidate the structure-activity relationship of the catalysts. The experimental and characterization findings propose a possible reaction mechanism involving synergistic effects of Ag 0 sites for dehydrogenation and ZrO 2 oxygen vacancies for O 2 activation. This work represents a notable advance in the field, as it develops the high efficient catalytic system under high FF concentrations and low-temperature conditions for the first time.
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Journal of Physical Chemistry Letters
·
2026
·
IF 4.5
Liyuan Wang,Zhishun Feng,Shiji Li,Hongsheng Liu,Yanying Ren,Junfeng Gao,Lei Li
Silver nanoparticles hold great promise in biomedical and environmental applications, yet small and uniform Ag nanoclusters are hindered by easy aggregation, uncontrollable growth, and difficult recovery. Here we report a rapid and controllable ultrasmall (1–4.5 nm) Ag nanocluster by uniformly dispersed encapsulation in ZSM-5 channels using a microwave-assisted one-pot synthesis strategy. The ZSM-5 containing 1.21 wt % Ag nanoclusters exhibits a high Ag atomic utilization rate of 81.2%. The unique confinement structure effectively prevents Ag nanocluster overgrowth while conferring exceptional recyclability, maintaining over 99.9% bactericidal efficacy against Escherichia coli after three cycles. Performance testing reveals the material exhibits remarkable peroxidase-like activity (3.73 U/mg) and catalytic capability (methylene blue reduction rate constant of 0.167 min–1). This study offers a size-controllable approach for preparing high-performance, easily recoverable, and scalable Ag-based nanomaterials.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Yue Han,Jiabao Dai,Qi Li,Yufeng Zheng,Peng Wen,Dandan Xia,Yongsheng Zhou
Recurrent infections and persistent inflammation pose significant challenges in the clinical treatment of infected bone defects. Here, a porous scaffold of Zn-0.8Li-0.5Ag with a TPMS-Gyroid structure was fabricated by laser powder bed fusion (LPBF) for the treatment of infected bone defects, integrating mechanical performance, anti-infective properties, and osteogenic requirements. In vitro, Zn-0.8Li-0.5Ag scaffold exhibits potent bactericidal property against Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ), excellent anti-inflammatory property through immunomodulation, and acceptable osteogenesis property by enhancing the expression of osteogenesis-related genes. In vivo, the Zn-0.8Li-0.5Ag scaffold significantly suppresses pathogenic bacteria, alleviates local inflammation, and promotes tissue regeneration. RNA sequencing further elucidated that the Zn-0.8Li-0.5Ag scaffold exerted anti-inflammatory effects by releasing Zn 2 + , Li + , and Ag + , which downregulated Gbp2 expression, thereby inhibiting inflammatory pathways. Collectively, the Zn-0.8Li-0.5Ag scaffold with antibacterial, anti-inflammatory, and osteogenic effects holds great promise as a promising biomaterial for repairing infectious bone defects.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Chuanlong Men,Zhenhang Lu,Chenchen Wu,Shengjie Gao,Peiyi Wang,Changhong Liu,Lei Zheng
A porous gelatin-gum/poly(lipoic acid) aerogel functioned as a structural skeleton. • In-situ synthesis achieved high-loading Ag/Ag 2 S with 95.27% encapsulation efficiency. • The composite aerogel enabled efficient synergistic ethylene adsorption and degradation. • Non-contact aerogel platform significantly extended the shelf life of various fruits. Postharvest spoilage of fruits, driven by ethylene-induced ripening and senescence, represents a major challenge to global food systems. Conventional ethylene control technologies, primarily relying on physical adsorption or chemical scavenging, struggle to simultaneously achieve high adsorption capacity and efficient catalytic degradation. Unlike physical blending or impregnation, this study developed a multifunctional aerogel by first constructing a porous, hydrophobic, and UV-barrier aerogel skeleton from a gelatin-gum (GG) complex cross-linked with poly(lipoic acid) (PLA), followed by the photocatalytic in-situ synthesis of uniformly dispersed Ag/Ag 2 S heterojunction nanoparticles, thereby achieving coupled adsorption-photocatalysis synergy at the nanoscale. Structural characterizations confirmed that Ag ions were partially reduced to metallic Ag within the gelatin-gum/poly(lipoic acid) (GG/PLA) skeleton under simulated sunlight, forming a uniformly dispersed Ag/Ag 2 S composite system. Performance evaluation revealed that the aerogel's three-dimensional porous network facilitated efficient ethylene diffusion and enrichment, while the Ag/Ag 2 S heterojunction promoted charge separation, enabling dynamic adsorption-photocatalysis synergy. Notably, at the PLA:Ag molar ratio of 1:1, the composite aerogel synergized its high ethylene adsorption with efficient photocatalytic activity, achieving approximately 95.21% ethylene removal within 24 h. It also demonstrated excellent thermal stability and encapsulation efficiency. Furthermore, applied as a non-contact platform, it effectively maintained the quality and extended the shelf life of both tomatoes and strawberries. This work establishes a design paradigm that couples ethylene adsorption with photocatalytic degradation for intelligent preservation. Download: Download high-res image (172KB) Download: Download full-size image
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