APPLIED SURFACE SCIENCE
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2026
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IF 6.6
Xin Liao,Renjie Pan,Jie Xiao,Mingyang Jiang,Yue Feng,Huafeng Zhang
Preparing a hollow Ag-Cu 7 S 4 with lattice defect, improving Seebeck coefficient and thermoelectric effect. • Ag 3d band hybridization narrows bandgap, promotes electron-hole separation and thermoelectric-catalytic ROS generation. • Scaffold enables efficient photothermal conversion and synergistic thermoelectric output under 808 nm NIR-I irradiation. • Thermoelectric boost osteogenesis: 2.1±0.3-fold upregulation of ALP/ARS and 55±2% increase in osteogenic gene and protein. • ROS cascade photothermal disrupt biofilm and GSH, achieving 92±2% ( S. aureus ) and 94.2±2.1% ( E. coli ) antibacterial rates. Cuprous sulfide (Cu 7 S 4 ) shows great potential for thermoelectric treatment of infectious bone defects due to its favorable carrier mobility and thermal conductivity. Nevertheless, its applicability remains constrained by suboptimal carrier concentration, rapid electron-hole recombination, and poor near-infrared (NIR) absorption. Herein, silver ions (Ag + ) were incorporated into Cu 7 S 4 via cation exchange to form hollow Ag-Cu 7 S 4 nanoparticles, and subsequently embedded into polycaprolactone (PCL) to prepare PCL/Ag-Cu 7 S 4 scaffolds. Specifically, Ag utilizes its similar atomic radius to partially substitute for Cu, introducing lattice defects to enhance phonon scattering, further reducing lattice thermal conductivity, thereby enhancing thermoelectric therapy (TET). Meanwhile, hybridization of Ag 3d energy levels with the Cu 7 S 4 band structure optimizes the Fermi level, narrowing the bandgap, thus boosting electron-hole pairs generation and enhancing the thermoelectric catalytic generation of ROS. The scaffolds exhibit excellent NIR absorption and photothermal effect (PTT). The enhanced phonon scattering and conductivity significantly optimize the thermoelectric figure of merit. TET utilized electrical stimulation to promote osteogenic differentiation, upregulating Alkaline phosphatase and Alizarin red by 2.1 ± 0.3-fold and increasing osteogenesis-related mRNA and protein by 55 ± 2%. The narrowed bandgap boosts thermoelectric catalytic ROS generation, ROS synergistically with PTT destroyed the defense systems, achieving antibacterial rates of 92 ± 2% ( S. aureus ) and 94.2 ± 2.1% ( E. coli ). Download: Download high-res image (151KB) Download: Download full-size image
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Catalysts
·
2026
·Vol. 16
·期 5
·445
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IF 4.5
Sihui Song,Chunting Li,Sadaf Mutahir,Muhammad Asim Khan,Feng Yan
The catalytic reduction of toxic 4-Nitrophenol (4-NP) to valuable 4-aminophenol is highly important for environmental remediation. However, developing catalysts with high activity, good recyclability, and facile preparation remains challenging. Herein, Ag@Fe3O4nanocomposites were controllably synthesized with a facile one-pot polyol method. By varying the Ag:Fe precursor ratio, the structure could be tuned from dense and porous core-shell to Janus architectures. The porous Ag@Fe3O4nanoreactors (Ag:Fe-0.4) exhibited exceptional catalytic performance, achieving complete 4-NP reduction within 75 s, with an apparent rate constant (k) of 6.29 × 10−2s−1, a normalized rate constant (kn) of 3742 s−1mmol−1, and a TOF value of 1042 h−1. XPS results verified that the excellent activity originated from the porous structure and interfacial charge transfer from Ag to Fe3O4. The catalysts showed super-paramagnetism and could be reused for at least eight cycles with >95% conversion retained. It also displayed high efficiency in reducing diverse nitroaromatics and in natural water. This work highlights the significance of structural and electronic modulation, providing a scalable strategy for magnetically recyclable catalysts toward environmental remediation and heterogeneous catalysis.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 11
·1-12
·
IF 5.3
Liu Yansheng,Sun Yukun,Wang Guofu,Jia Xiaobo,Zhou Jin,Li Hongqi,Li Hongli,Chan Haixin,Li Kang,Jin Zhicheng,Li Zhaoxu
A novel surface-enhanced Raman spectroscopy (SERS)-based approach is introduced for the highly sensitive detection of perfluoroalkyl and polyfluoroalkyl substances (PFAS), polytetrafluoroethylene (PTFE), and polystyrene (PS) nanoplastics in serum samples using silver nanowire mesh (AgNWM) as SERS substrates. The surface-enhanced Raman scattering performance of AgNWM substrates was optimized using rhodamine 6G as a probe molecule, achieving a limit of detection (LOD) of 10 −9 M. Serum samples were subjected to pre-treatment steps, including protein removal, sample enrichment, and concentration, enabling quantitative detection of multiple PFAS species at as low as 10 −8 M. PTFE and PS nanoplastics were also successfully identified at a concentration of 100 ng·mL −1 . Furthermore, the AgNWM substrates exhibited significant stability and could be reused up to 10 times for plastic detection without substantial loss of sensitivity. This highly sensitive SERS platform provides an innovative and effective methodology for the detection of PFAS, PTFE, and PS nanoplastics in complex biological matrices, with considerable potential for clinical and environmental analyses. Graphical
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Wanlin Qin,Xianliang Li,Yuchi Zhang,Le Han,Zhijin Cheng,Zhijie Li,Yan Xu
The development of electrocatalysts that show multifunctionality towards efficient sensing and energy applications are of great significance. Herein, we report a rational design of photochemical deposition of Ag nanoparticles (Ag NPs) on ZIF-67-decorated carbon nanotube (Ag NPs/ZIF-67 @CNT) hybrid, which exhibits dual-functional capabilities for both effective enzymeless glucose detection and electrocatalytic water oxidation . The distribution of Ag NPs on the ZIF-67-functionalized CNT can be optimized by adjusting the concentration of Ag + aqueous solution during the light illumination process. The optimized Ag NPs/ZIF-67 @CNT composite showed superior glucose-sensing capability with a low determination limit of 0.46 μM (S/N = 3), high sensitivity of 469.4 μA·mM −1 ·cm −2 , wide linearity detection range (0.010–7.0 mM) and short response time (less than 5 s). Also, the Ag NPs/ZIF-67 @CNT composite acting as potential electrocatalyst possessed an overpotential of 286 mV with a Tafel-slope of 80.75 mV dec −1 at 10 mA·cm −2 for high durability water-oxidation reaction. This work provided a feasible way to prepare Ag NPs decorated ZIF-67/CNT with modulated bifunctional catalytic performances via photochemical reduction strategy, which can also provide effective guidance for designing other multifunctional electrocatalysts .
研究领域:
材料科学
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电化学
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生物传感
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能源催化
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纳米医学
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2026
·
IF 4.8
Yuzhu Hao,Zicheng Zhao,Xiaohong Liu,Yutong Wang,Heping Bai,Ganggang Ai,Xiaofeng Liu,Ran Li
This study developed a novel SERS detection platform based on seed-mediated synthesis of core-shell structured Au@Ag NPs. Benefiting from the atomic synergistic effects between the gold core and silver shell, the substrate demonstrated exceptional stability, enabling simultaneous dual-target detection of Thiram and Paraquat. Experimental results revealed linear response ranges of 1.0 × 10 −6 –1.0 × 10 −4 M (LOD: 6.89 × 10 −8 M) at 1380 cm −1 for Thiram, and 1.0 × 10 −5 –1.0 × 10 −3 M (LOD: 9.75 × 10 −6 M) at 840 cm −1 for Paraquat. Spiked recovery rates in apple samples reached 95.6%–102% for Thiram and 95%–98.4% for Paraquat. Quantitative analysis of mixed systems using an MLP model achieved 91% accuracy, 89% recall, 89% F1-score, and 90% precision. This method provides a highly sensitive and reliable technical solution for simultaneous detection of multiple pesticide residues in complex food matrices, demonstrating significant potential for rapid food safety monitoring applications.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Lihua Li,Wenzhi Zhang,Huichao Chen,Zhigang Zhao,Meifang Wang,Jiexia Chen
In this work, a method for the visual and electrochemical detection of the breast cancer marker CA15–3 was developed based on the etching reaction of gold/silver core-shell nanoparticles (Au@Ag NPs) by mercury ions (Hg 2+ ). Two kinds of nanocomplex of silicon dioxide nanospheres-antibodies-mercury ions (SiO 2 NSs-Ab-Hg 2+ ) and Au@Ag NPs-antibodies (Au@Ag NPs-Ab) were first prepared in the visual detection. In the presence of antigen, a sandwich structure of immuno-complex was formed through the specific recognition reaction of antigen and antibody. Then, after the addition of pH 4.6 CPBS, redox reaction occurred between Hg 2+ and silver shell. With the increase of the amount of antigen, the silver shell was etched thinner and thinner, and the color changed obviously. Visual detection of CA15–3 could be realized in the range of 30–300 U/mL. In addition, we adopted the DPV signals generated by Hg 2+ etching of silver shell to realize the electrochemical detection of CA15–3. The detection concentration range was 0.1–200 U/mL with a detection limit of 0.05 U/mL.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Wenxia Tian,Xiaofang Liu,Jia Zheng,Yi Ma,Huibo Luo,Xiaogang Luo,Changjun Hou,Danqun Huo
Quickly discriminating different segmented Baijiu can directly control its grade and indirectly affect the quality of the finished Baijiu. A fluorescence sensor array was constructed based on PEI-terminated silver nanoparticles and lanthanide metal ions (PEI@Ag NPs@Ln). Ag NPs were stably dispersed in the PEI-woven network, initially accompanied by excellent fluorescence signals. Organic molecules disrupted the PEI structure and dragged the Ag NPs out. The free Ag NPs sintered or aggregated with the diffusion, resulting in fluorescence quenching. The three lanthanide ions speed up the process, allowing different organic molecules to exhibit more distinct signals. Thus, this sensor was used to map 11 organic molecules’ fingerprints and to discriminate segmented Baijiu. The whole process takes only 2 min. With the assistance of pattern recognition, segmented Baijiu from three cellars were successfully discriminated. Fast, effective and simple are highlights, which opens up its practical application potential in the detection field.
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Molecular Catalysis
·
2023
·
IF 4.6
Wei Chen,Jinyan Xiong,Zhipan Wen,Rong Chen,Gang Cheng
Photocatalytic CO 2 reduction offers a potential to produce clean and renewable fuels as well as reduce massive emissions of CO 2 by utilizing solar energy. The inhibited charge recombination and fertile surface reactive sites play vital roles in determining the photocatalytic performance and products selectivity in CO 2 reduction reaction. Herein, the Ag/TiO 2-x hybrid by synchronistic introduction of oxygen vacancy and Ag nanoparticles into SiO 2 spheres-templated potholed TiO 2 assembly with nanoparticles is constructed for photocatalytic CO 2 conversion. The Schottky junction between oxygen vacancy TiO 2-x and Ag particles provides synergistic enhancement of solar light utilization, photo-induced charge separation and migration process, which is of significance in the promoted CO 2 photo-conversion. Indeed, the CH 4 yield of oxygen vacancy TiO 2-x (1.56 μmol/g/h) is more than 3 times as high as the TiO 2 (0.47 μmol/g/h), while the as-synthesized Ag/TiO 2-x hybrids show an enhancement of photocatalytic CO 2 reduction into CH 4 and CO. Among them, the Ag/TiO 2-x -10% hybrid has the best photocatalytic performance, and it shows significantly superior CH 4 (8.61 μmol/g/h) and CO (2.27 μmol/g/h) yields to that of pure TiO 2-x and TiO 2 .
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Engineering Research Express
·
2023
·Vol. 5
·期 1
·015080
·
IF 1.7
Kunpeng Gao,Qianjin Wang,Junqi Tang,Yingkai Liu
Resistive-type strain sensors have been widely studied because of their high precision and convenient measurement. But the high sensitivity and large strain range of this kind of sensor conflict with each other. It is difficult to prepare a sensor with high sensitivity and a large tensile range at the same time. Here, we propose a method to use AgNWs/Ag microparticles (AgMPs) and PDMS to simultaneously manufacture two strain sensors with different principles, a crack-based sensor and a composite-based sensor. On the one hand, the crack-based sensor has a low detection limit of 0.5% strain and high sensitivity of GF ≈ 90 at the strain of 0 ∼ 50%. It is suitable for the detection of small strains and can detect throat vibration when speaking. On the other hand, the composite-based sensor has a large strain range of 0 ∼ 240% and excellent stability. After 1000 cycles of stretching-releasing at 50% strain, the resistance change rate remains unchanged. It is suitable for the detection of large strains. Moreover, the sensitivity and working range of the composite-based sensor can be adjusted by changing the ratio and total amount of AgNWs/AgMPs composites. It can accurately monitor the different bending angles of the elbow joint and a people's walking status and pace. The strain sensor prepared by this method has great practical value in wearable devices and electronic skin.
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JOURNAL OF APPLIED PHYSICS
·
2023
·Vol. 133
·期 21
·
IF 3.2
Zeng Zhenghong,Xu Cenkai,Ren Junwen,Yang Zefeng,Wu Guangning,Wei Wenfu
The development of composite materials with excellent thermal conductivity is attracting extensive attention to meet the increasing heat concentration challenges in both power and electronic equipment. Previous strategies for improving the thermal conductivities usually accompanied by the cost of mechanical strength. Herein, we propose a new strategy for developing both mechanically strong and thermally conductive composite films. The aramid nanofibers (ANF) are well prepared with introducing Ag nanoflakes and graphene oxide (GO) via vacuum-assisted filtration and hot-pressing treatment. Results indicate the synergistic effects of low dimension materials have resulted in a tightly arranged phonon network construction. The in-plane thermal conductivity of the prepared ANF/Ag/GO film reaches 9.84 W m −1 K −1 , about 371% higher than that of pure ANF. Meanwhile, the strong hydrogen bond formed between the functional group of GO and the amide group of ANFs plays a synergistic strengthening and toughening role at the complex interface, and the tensile strength reaches 231 MPa. We believe that these findings shed some light on the design and fabrication of multifunctional materials for thermal management applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Junnan Wang,Minqiang Wang,Jindou Shi,Yun Zhou,Chen Zhang,Arshad Saleem Bhatti
Flexibility and self-cleaning are the main research hot-spots in the development of plasma substrates for practical applications in Surface-enhanced Raman scattering (SERS) at present. In this study, a flexible composite Au@Ag/ultrathin g-C 3 N 4 /Graphene (AUG) film based on PDMS film was reported and used as a highly sensitive SERS substrate for the detection of rhodamine 6G (R6G) molecules. The Au@Ag nanosphere array formed by self-assembly provided dense hot-spots, the ultrathin g-C 3 N 4 enabled the composite to possess excellent photocatalytic ability, and the graphene enhanced SERS detection and photocatalytic performance while improving the stability of the composite film . The results showed that the AUG flexible composite film had a detection limit of 10 −12 M for R6G molecules. After 10 photocatalytic cycles of testing, the composite film maintained 83 % of SERS activity. Benefiting from the graphene covering the surface, the composite films showed only a 5 % decrease in SERS detection performance after 30 days of storage in air. The facile fabrication process of AUG composite film enables it to be an outstanding candidate for the flexible, inexpensive, and stable wearable SERS sensing systems.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Bingxue Hu,Da-Wen Sun,Hongbin Pu,Zhibin Huang
Cellulose material holds considerable promise for effective surface-enhanced Raman scattering (SERS) substrate construction due to its extensive availability, chemically modifying capacity, ease of manufacture, high flexibility and low optical activity. A large-area, high-sensitivity, stable and uniform Au@Ag nanorods (NRs)-CMC substrate was successfully developed via electrostatic repulsion by using negatively-charged core–shell Au@Ag NRs as SERS active plasmonic nanomaterial, combined with negatively-charged carboxymethylcellulose (CMC) hydrogel for nanoparticles stabilization, homodisperse and protection. The obtained Au@Ag NRs-CMC substrate showed excellent sensitivity for the detection of thiram residues in fruits containing low and abundant pigment interferents, such as apples and blueberries, with detection limits of 58 and 78 ppb, respectively. Additionally, it retained more than 80% SERS performance after storage for 9 months under ambient conditions, demonstrating its great potential in facilitating the commercialization of cellulose-based SERS technology for cost-effective detection of food contaminants with advantages of facile preparation procedure, uniformity, reproducibility and long-term stability.
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