JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Caizhen Zu,Xishun Peng,Yi Long,Man Peng,Cunwei Wang,Haili Zhang,Zhangwei Tan,Yuxue He,Zhongchen Bai
Detecting antibiotic residues in food is a critical challenge for food safety assurance. This study developed a surface-enhanced Raman scattering (SERS) sensor based on two-dimensional graphitic carbon nitride (g-C 3 N 4 ) loaded with Au@Ag core-shell nanostructures (g-C 3 N 4 /Au@Ag) for detecting nitrofurantoin (NFT) residues in honey. The g-C 3 N 4 /Au@Ag thin film was fabricated by sequentially depositing g-C 3 N 4 nanosheets, Au nanoparticles, and Ag nanoparticles onto a stainless steel substrate via an electrochemical deposition method. This SERS sensor could synergistically amplify SERS signals by combining the localized surface plasmon resonance (LSPR) from the Au@Ag nanostructures with the charge transfer between the g-C 3 N 4 semiconductor and Au@Ag nanostructures. The optimized SERS sensor achieved an exceptional SERS enhancement factor of 3.8 × 10 6 for NFT in aqueous solutions, with a limit of detection (LOD) of 0.72 nM. Moreover, this SERS sensor could also recognize NFT residues in honey matrices at an LOD of 5 nM. These results provide a novel strategy for the highly sensitive detection of antibiotic residues in food safety monitoring, highlighting its potential for rapid screening of NFT residues in food.
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Laser & Photonics Reviews
·
2025
·
IF 10
Dengbang Zhao,Zhipeng Chen,Meng Wang,Mochen Jia,Jibin Zhang,Linyuan Lian,Yanbin Han,Xu Chen,Zhuangzhuang Ma,Ying Liu,Zhifeng Shi
Ion doping is an effective strategy to regulate the optical performance in metal halide perovskites for desirable light emission manipulations. In this work, a Mn 2+ and Ag + co-doping strategy is utilized to improve the luminescence in Cs 4 CdBi 2 Cl 12 quadruple perovskite. Mn 2+ and Ag + ions are proven to be incorporated into Cs 4 CdBi 2 Cl 12 lattice. Mn 2+ ions occupy Cd 2+ sites and Ag + ions occupy Cd 2+ sites or vacancies. The alloyed Mn 2+ ions bring efficient orange-red luminescence attributed to the energy transfer process from the host to Mn 2+ ions. A small amount of Ag + doping can optimize the band structure and increase the exciton binding energy, thus promoting efficient radiative recombination from d–d transition of Mn 2+ ions and boosting the PLQY up to 94.6%. Furthermore, Cs 4 Cd 0.75 Mn 0.25 Bi 2 Cl 12 :1.5%Ag + show good phase and emission stability in ambient environment and is employed in white light-emitting diodes with commercial blue and green phosphors on a near-ultraviolet LED chip. This work provides insights for understanding the composition-structure-property relationship in vacancy-ordered quadruple perovskites and designing highly efficient luminescent lead-free metal halides for solid-state light emitting applications.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 109
·期 1
·e70360
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IF 3.8
Zhang Xiangzhao,Zhang Yinuo,Wang Chen,Guo Qinhan,Liu Guiwu,Qiao Guanjun
This study investigates the effect of SiC pre-oxidation on the air reactive wetting and brazing behavior of Ag–Nb 2 O 5 fillers. An obvious SiO 2 layer induced by the pre-oxidation can improve the wettability of the Ag–Nb 2 O 5 /SiC system as the contact angle decreases from ∼75° to ∼25° with increasing Nb 2 O 5 content, accompanied by localized AgNbO 3 formation at the interface and the triple line. Moreover, the Nb 2 O 5 addition promotes a progressive growth of AgNbO 3 , transforming the interfacial structure from Ag/SiO 2 /SiC to Ag/AgNbO 3 /SiO 2 /SiC. An optimal Nb 2 O 5 content effectively reduces the direct Ag/SiO 2 contact while avoiding excessive AgNbO 3 formation and associated thermal stresses, resulting in a maximum shear strength at 4% Nb 2 O 5 . First-principles calculations demonstrate that the AgNbO 3 /SiO 2 interface exhibits a higher bonding strength than the Ag/SiO 2 interface, showing a strong interfacial charge transfer between AgNbO 3 and SiO 2 , which is consistent with enhanced mechanical performance. The insights gained from SiC pre-oxidation offer a potential pathway for advancing the air brazing of other non-oxide ceramic systems.
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Small
·
2025
·
IF 12.1
Xiaohang Yang,Zhiqiang Sun,Panxin Wang,Qi Wang,Qiong Li,Xingbo Bian
Soil salinity is a critical abiotic stressor that disrupts plant growth by impairing redox balance, membrane stability, and metabolic coordination. While nanomaterials have emerged as promising abiotic stress modulators, the influence of nanoscale architecture on multi-level plant responses remains insufficiently understood. Here, we report the design and application of pinwheel-like α-Fe 2 O 3 @Ag nanohybrids, engineered through controlled hydrolysis, ball milling, and high-temperature calcination, to reprogram salt stress responses across physiological and molecular scales. These hybrids exhibit hierarchical anisotropic structures that promote leaf adhesion, cellular uptake, and redox interface activity. Integrated multi-omics analyses reveal that α-Fe 2 O 3 @Ag enhances stress tolerance by modulating antioxidant defense, preserving photosynthetic efficiency, and rebalancing osmotic and hormonal pathways. At the molecular level, the nanohybrids induce transcriptomic and metabolomic rewiring across key axes, including unsaturated fatty acid metabolism, sulfur assimilation, hormone signaling (ABA and JA), and protein turnover. This study presents a structure-function-response framework linking nanomaterial morphology to biological outcomes, and highlights the potential of hybrid nanoregulators as versatile tools for enhancing crop resilience under environmental stress. The findings offer conceptual and practical advances for developing next-generation nano-enabled strategies in sustainable agriculture.
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PubMed
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 10
·748
·
IF 4.3
Chen Yang,Jingjing He,Siying Chen,Qiuping Li,Xuexia Lin
In this study, silver-decorated cerium oxide (Ag@CeO2) nanoparticles were synthesized through a simple mixing and pyrolysis process to enhance their antioxidant and antitumor properties. The synthesis methods for Ag@CeO2were optimized, resulting in nanoparticles with varying antioxidant activities. Notably, the embedding of Ag nanoparticles within CeO2during pyrolysis significantly improved the antioxidant activity and stability of the nanoparticles, leading to enhanced antitumor effects. The Ag@CeO2nanoparticles exhibited strong cytotoxicity against tumor cells (MCF-7) while maintaining low toxicity toward normal cells (HUVECs). These properties, combined with their ability to modulate mitochondrial membrane potential, position Ag@CeO2as a promising candidate for electrochemical therapy (ECT). This study highlights the antioxidant potential and the potential of Ag@CeO2nanoparticles in tumor treatment and provides new insights into the application of nanomaterials in ECT.
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PubMed
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ENERGY & FUELS
·
2025
·
IF 5.3
Wenhui Ma,Li Li,Yan Lin,Fei Wang
The use of a fixed bed has emerged as an effective approach to enhance methane hydrate formation for energy storage. In this study, a novel fixed bed was developed by incorporating Ag nanoparticles, which could serve as hydrate nucleation sites to ultralight graphene aerogel (Ag@GA) and then evaluated in methane hydrate formation. The presence of Ag nanoparticles on the fixed bed enhanced the hydrate nucleation dramatically, which shortened the induction time from 775.3 ± 186.66 min without Ag nanoparticles to 0–15 min. With the increase in the initial pressure (5–8 MPa), the hydrate growth rate ascended gradually from 0.063 to 0.26 mol/min/L, while the mass storage capacity remained stable at a high level of 0.120–0.126 g/g. The temperature in the range 273.15–276.15 K did not produce an obvious influence on both the hydrate formation kinetics and methane storage efficiency. However, the concentration of the kinetic promoter (l-methionine) dominated the hydrate formation significantly, especially the hydrate growth rate and morphology. At a low l-Met concentration (1 g/L), hydrates formed majorly in the inner pores of the fixed bed with a high growth rate (0.27 mol/min/L), while with the l-Met concentration increased to 2, 3, and 4 g/L, hydrates tended to grow out of the fixed bed and accumulated on the top and lateral surface. The morphology of hydrates varied from acicular crystals to hydrate blocks, and the hydrate growth rate decreased to 0.099 mol/min/L and then increased to 0.17 and 0.25 mol/min/L. Moreover, the excellent cyclic performance of Ag@GA was confirmed in five cycles of hydrate formation and dissociation, in which the induction time was 0–8.3 min, the hydrate growth rate reached 0.254–0.263 mol/min/L, and the methane storage capacity was kept at 135–145 V/V. This study provides an effective pathway for the application of ultralight fixed beds in hydrate-based natural gas storage and transportation.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yiyan Jiang,Hongkuo Si,Maolin Chen,Miao Su,Gangqiang Wang,Caiqin Gu,Shujun Zhao,Shuangfei Xiang,Xiangdong Liu,Feiya Fu
Direct fabrication of antimicrobial cellulose filaments by wet spinning remains challenging due to complex nanoparticle synthesis and dispersion issues. To address this, we developed a one-pot in situ synthesis strategy within a cellulose-dissolving alkaline system. In this approach, the hydroxyl and terminal aldehyde groups of cellulose chains facilitate the in-situ formation of antibacterial particles (Ag NPs, ZnO). By modulating the particles composition and coagulation bath, we have produced three structurally distinct antibacterial regenerated cellulose filaments. These are designated as regenerated cellulose filaments contain Ag NPs (ACF), regenerated cellulose filaments contain ZnO particle (ZCF) and regenerated cellulose filaments contain ZnO particle and Ag NPs (AZCF). ACF exhibited a smooth surface with limited silver nanoparticle visibility, ZCF displayed surface roughness due to ZnO particle aggregation, and AZCF maintained surface smoothness with dense, uniform nanoparticle distribution. This phenomenon is attributed to the interactions of Ag NPs and ZnO particles. Based on this interaction, the regenerated cellulose developed in this study exhibit both antimicrobial activity (> 95 % bactericidal rates against both E. coli and S. aureus ) and low cytotoxicity. Mechanistic investigations indicate that its antibacterial effects originated from the synergistic action of reactive oxygen species (ROS) production and regulated metal ion release.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Zhirou Xu,Zhengtong Wu,Xuyang Sun
An ultrasensitive fluorescence immunosensor based on silver nanoparticles@ nitrogen-doped carbon quantum dots (Ag NPs@N/CQDs) and exploiting the quenching effect of gold nanoparticles (Au NPs) was fabricated for squamous cell carcinoma antigen (SCCA) detection. Ag NPs@N/CQDs were immobilized on the surface of an indium tin oxide (ITO) electrode and then coupled with the primary antibody of SCCA. The primary antibody captured SCCA on the ITO electrode, forming an immune complex with the secondary antibody labeled with gold nanoparticles, thereby constructing a sandwich-structured fluorescent sensor. Using the prepared sensor, a new method for detecting trace amounts of SCCA in human serum was established. Owing to the effective quenching of fluorescence intensity of Ag NPs@N/CQDs by Au NPs, combined with the presence of a sandwich immune structure, the sensor exhibits high sensitivity and selectivity. The method demonstrates a linear range of 2 − 4000 fg mL −1 and a detection limit of 0.87 fg mL −1 . The the recovery rate for real serum samples was between 94.45 % to 103.43 %.
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Journal of Building Engineering
·
2025
·
IF 7.4
Wencheng Wang,Nanxi Xie,Zhenkun Lin,Yong Zhang,Yan Chen,Zhongmin Liu
The application of corrosion inhibitors provides an efficient approach for mitigating steel rebar corrosion. However, the premature failure of corrosion inhibitors in concrete remains a pending issue. The adoption of microencapsulated inhibitors shows significant promise in addressing this concern. This study proposes a novel chloride ion-triggered microcapsule designed for the anti-corrosion protection of reinforcement. The microcapsules were synthesized using calcium carbonate (CaCO 3 ) particles as a template and sodium monofluorophosphate (MFP) as the encapsulated inhibitory core. The exterior of the CaCO 3 particles was coated with a silver alginate (Alg-Ag) layer, which confers the chloride ion-triggered release mechanism. The activation of microcapsules occurs through a chemical reaction between silver ions in the Alg-Ag layer and chloride ions from the environment, resulting in the formation of silver chloride and the subsequent disintegration of the microcapsule. The MFP inhibitor is released as a consequence. The fabricated microcapsules were characterized in terms of morphology and chemical composition. The inhibitory performance of the microcapsules was analyzed by electrochemical methods. The use of the CaCO 3 template was found to be effective in producing a porous matrix suitable for the loading of MFP. The microcapsules exhibit a well-defined spherical morphology with a distinct core-shell structure. Both FTIR and TG analysis confirmed the successful entrapment of MFP within the core of microcapsules. Electrochemical corrosion tests demonstrated that the microcapsules effectively retarded the corrosion process of the reinforcement, with the corrosion inhibition efficiency increasing from 59.1 % at 24 h to 63.8 % at 72 h, indicative of a controlled and progressive release of the inhibitor from the microcapsules.
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Journal of Physical Chemistry C
·
2018
·
IF 4.484
Xueyan Chen,Min Chen,Guangzhi He,Fei Wang,Guangyan Xu,Yaobin Li,Changbin Zhang,Hong He
Ag-based catalysts are efficient materials for formaldehyde (HCHO) oxidation in the low-temperature range. It has been reported that K addition can increase the catalytic performance of Ag-based catalysts, whereas the specific role of K doping remains ambiguous. In this work, Ag/Al2O3 and K–Ag/Al2O3 catalysts with different K doping levels were prepared and subsequently tested for catalytic HCHO oxidation. It was observed that K doping has a dramatic promotion effect on the activity of the Ag/Al2O3 catalyst. The 2K–Ag/Al2O3 sample was the most active catalyst, over which HCHO could be completely converted into CO2 and H2O in a gas hourly space velocity of 100 000 mL/(gcat h) at 65 °C. The catalysts were next characterized by X-ray powder diffraction, Brunauer–Emmett–Teller, transmission electron microscopy, H2-temperature-programmed reduction, UV–vis, X-ray absorption fine structure, and in situ diffuse reflectance infrared Fourier transform spectroscopy methods. The characterization results show that addition of K species increased the content of metallic Ag species in Ag/Al2O3 catalysts and promoted the adsorption and activation of oxygen species, whereas excessive doping with K+ resulted in the agglomeration of Ag particles and loss of some metallic sites. Therefore, the 2K–Ag/Al2O3 catalyst demonstrated the best performance among the series of K-doped catalysts. Promotion of O2 activation by K doping, rather than enhanced Ag dispersion or surface OH activation or exposure of more Ag(111) facets, was found to be the key factor in the improved catalytic performance of K–Ag/Al2O3 catalysts.
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JOURNAL OF CATALYSIS
·
2016
·
IF 7.354
Shuang Liu,Xiaodong Wu,Wei Liu,Wenming Chen,Rui Ran,Min Li,Duan Weng
Three model ceria catalysts, which are monocrystalline CeO 2 nanocubes, polycrystalline CeO 2 nanoparticles, and polycrystalline CeO 2 spindles, were synthesized and analyzed with isothermal soot oxidation, H 2 -TPR, and Raman spectroscopy. The results suggest that the initial activity of the catalyst is determined by the number of catalyst–soot contact points rather than the catalyst surface area, while the catalyst stability is closely related to the concentration of surface oxygen vacancies . Excessive surface oxygen vacancies may inhibit the regeneration of highly active O 2 − and lead to catalyst deactivation during reaction. After impregnation with Ag, O − can be readily regenerated and transformed to O 2 − , resulting in a 10-fold increase in soot oxidation activity over Ag/CeO 2 . Among these catalysts, Ag supported on nanocubic CeO 2 exhibits good availability of O 2 − and therefore high catalytic activity and stability, and is thus considered a promising catalyst for application in gasoline particulate filters.
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Weihuang Yang,Hua Li,Jiajun Chen,Jun Yin,Jing Li,Yaping Wu,Bingjie Mo,Ting Wu,Baofan Sun,Zhiming Wu,Hao Wang,Linxi Dong,Gaofeng Wang
Monolayer transition metal dichalcogenides (TMDs) usually have weak optical emission due to the poor light absorption as being atomically thin. Enhancing their optical properties by surface plasmon resonance is attractive for applying atomically thin TMDs in optoelectronic and photonic devices. Here, Ag/WS 2 hybrid structure was fabricated by transferring monolayer WS 2 grown via chemical vapor deposition (CVD) onto optimized periodic Ag nanoprism array with well-matched resonance by controlling the mask geometry and etching time of polystyrene (PS) nanospheres. Significant enhanced photoluminescence (PL) emission and Raman scattering were successfully achieved. Especially, the higher enhancement is realized for neutral excitons of monolayer WS 2 . Theoretical calculations reveal that the plasmonic enhancement mainly results from the highly enhanced local electric field and the charge transfer. This work explores the feasibility of exciton emission and Raman scattering enhancement for TMDs with plasmonic nanostructures fabricated by low-cost and easily-manipulated nanosphere lithography (NSL), which paves a way towards the applications of plasmon-enhanced TMD sensors, emitters, and photodetectors.
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