Environmental Science-Nano
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2026
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IF 5.6
Yufei Zhao,Xiangrui Wang,Yibing Hou,Zhejie Hou,Wenhong Fan
Silver nanoparticles (AgNPs) are widely used in industrial production and daily life, and their potential risks to aquatic environments deserve further attention. However, contributions of AgNPs and their released ions in the biodynamic processes within aquatic organisms remained largely unknown. To address this, this study fabricated various Au@AgNPs with different surface coatings to clarify key factors controlling the biodynamics of AgNPs under direct exposure in the water phase versus indirect exposure through the food chain (Escherichia coli-Tetrahymena thermophila). Au@AgNPs, a core-shell material, could well distinguish the bioaccumulation and transfer processes of particulate Ag and released Ag+. It is demonstrated that surface coating significantly influenced the biodynamics and trophic transfer of Au@AgNPs by regulating their surface charge. In water-phase exposure, surface coatings did not directly alter the internalization and excretion processes of AgNPs. Instead, they significantly modulated the dissolution behavior of the internalized particles and excretion rate of released Ag+ to induce the discrepancies in Ag accumulation ultimately. During trophic transfer, ethylene imine polymer-coated Au@AgNPs transferred from E. coli to T. thermophila in relatively intact particle form, exhibiting the highest relative transfer efficiency for NPs. In contrast, polyvinylpyrrolidone-Au@AgNPs showed the lowest transfer efficiency for both Ag and NP, indicating lower bioavailability, reduced transformation, and higher excretion efficiency. In conclusion, this study demonstrates that surface coating modulates AgNPs biodynamics and transport processes in aqueous exposure and trophic transfer pathways by itself and regulating surface charge. When assessing nanomaterial ecological risks, it is essential to consider both the differential behavior of particulate and ionic forms and the potential amplification effects through trophic transfer.
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Materials Today Nano
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2026
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IF 7.6
Hui Zhang,Shuangshuang Li,Yan Gao,Yu Hua,Yi Hou,Jinlei Yu,Lixi Wang
Multi-functional materials of both electromagnetic wave and bacterial suppression capacity are in significant practical demand for the surfaces of modern bio-medical devices. Meanwhile, the complex surface geometries put more requirements on the flexibility and durability. Ceramic-based materials with both dielectric loss and biocompatibility serve as an excellent template to meet these commands, However, the inherent brittleness further limits their practical application. Herein, we developed a flexible Ag-decorated SiOC nanofiber membrane via pyrolysis-assisted electrospinning. The Ag@SiOC nanofiber membrane retains approximately 98% of its compressive stress after 100 fatigue cycles and exhibits less than 2% variation in electrical resistance over 500 consecutive bending cycles. The incorporation of Ag significantly enhances dielectric and conductive loss ability, enabling an ultra-broad effective absorption bandwidth of 8.3 GHz (9.7-18 GHz) and a remarkable minimal reflection loss of −66.9 dB. Furthermore, the Ag@SiOC membrane demonstrates potent and stable antibacterial activity against both E. coli and S. aureus , maintaining clear inhibition zones over 12 h. This work presents a lightweight, flexible, and robust multifunctional composite, demonstrating significant potential as a conformal electromagnetic wave and bacterial protective material for cutting-edge technological and biomedical environments.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Lin Yue,Xiaoyun Han,Shiqi Xing,Wang Liang,Yanfang Liu,Yushan Zhang,Yonghui Han
Ag was loaded onto Sn-PTA-MI by the photodeposition method. • Dark reaction experiment confirms Sn-PTA-MI/Ag has the “memory catalysis” effect. • “Memory catalysis” effect boosted by free radical chain reaction from released electrons. • Alternating light-dark reaction enhances utilization efficiency of photogenerated carriers. • PDOS spectroscopy confirms strong interaction between Ag atoms and N, C atoms. A Sn-PTA-MI/Ag photocatalyst with “memory catalysis” effect was prepared by the photodeposition method to load Ag onto Sn-based metal-organic framework (MOF), and the “memory catalysis” effect was confirmed by photoreaction, dark reaction, and alternating light-dark reaction experiments. Under photoreaction, the degradation efficiency of methyl orange (MO) catalyzed by Sn-PTA-MI/Ag reached 90.7% in 60 min. The pre-illumination activation of the Sn-PTA-MI/Ag catalyst facilitated the storage of photogenerated electrons, which are released under dark reaction conditions and subsequently participate in MO degradation. Meanwhile, the “memory catalysis” effect can be significantly enhanced through the free radical chain reaction triggered by the released electrons under dark reaction. The alternating light-dark reaction process achieves continuous degradation of MO, and compared to traditional photocatalytic reactions, the degradation effect of MO is improved by approximately 10%. Projected density of states (PDOS) and Fermi level analysis indicate that strong interactions exist between Ag atoms and N, C atoms, confirming that the optimization of electronic properties and the enhancement of charge separation in the Sn-PTA-MI/Ag system are the main reasons for the increase in activity. This study provides a strategy for the continuous degradation of pollutants, which is of great significance for sustainable environmental remediation. Download: Download high-res image (180KB) Download: Download full-size image
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Green Energy & Environment
·
2025
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IF 14.6
Ruifeng Wang,Yuchang Liu,Yandong Li,Yafen Kong,Qizhi Chen,Shuangliang Zhao
Efficiency of C-C bond coupling in highly inert CO 2 is relatively low, which severely limits its efficient conversion to acetate. Here, we successfully developed a highly stable NF@CoMn 2 O 4 @Cu 2 O-Ag bimetallic active site catalyst by anchoring Ag on the Cu 2 O surface. In this catalyst, the Co 3+ /Mn 3+ -Mn 4+ removes excess electrons from the Cu + sites via strong electronic interactions, preventing the reduction of Cu 2 O to metallic Cu 0 , which ensures the NF@CoMn 2 O 4 @Cu 2 O-Ag exhibits a high resistance to deactivation. The Cu + active sites of NF@CoMn 2 O 4 @Cu 2 O-Ag efficiently electroreduce CO 2 to the *CO atop intermediate, while the Ag active sites efficiently electroreduce CO 2 to the *CO bridge intermediate. The proximity of Cu + /Ag bimetallic sites shortens the distance for C-C bond coupling between the *CO atop and *CO bridge intermediates, facilitating the efficient electrocatalytic coupling of CO 2 to synthesize acetate. DFT analysis indicates that the ΔG required for C-C bond coupling on the short-distance Cu + /Ag bimetallic sites of NF@CoMn 2 O 4 @Cu 2 O-Ag is significantly lower than that of NF@CoMn 2 O 4 @Cu 2 O, enabling a high Faradaic efficiency of 64.97% for acetate production at -0.3 V vs. RHE. This study provides an effective strategy for the rational design of synergistic catalysis between heterometallic catalytic sites to efficiently achieve C-C coupling for the synthesis of C 2+ products.
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Surfaces and Interfaces
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2025
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IF 6.3
Ping Liang,Jianbin Lin,Xiongcong Guan,Jie Wang,Xinxin Zhang,Xin He,Qi Feng,Chi Zhang
Self-supported nanoporous metal foils with precisely engineered architectures are promising for catalysis, sensing, and environmental remediation, yet their scalable fabrication remains challenging. Here, we present a sequence-controlled liquid gallium (Ga)-assisted alloying/dealloying strategy, integrated with thermal evaporation, to construct Ag-modified nanoporous copper (Cu) foils. By varying the Ag deposition sequence, two distinct architectures were obtained: one features Ag 3 Ga intermetallic decorations, while the other forms a continuous Ag network within the nanoporous Cu. Subsequent electrooxidation generates Cu x O nanoneedles as catalytically active sites. The architecture with dispersed Ag 3 Ga yields exceptional non-enzymatic glucose sensing with high sensitivity, low detection limit, and long-term stability. In contrast, the continuous Ag network promotes outstanding photo‑Fenton degradation of organic dyes within minutes and excellent reusability. This work demonstrates a versatile approach to spatially control noble metal distribution in nanoporous Cu foils, enabling multifunctional catalytic systems for biosensing and environmental purification.
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MATERIALS & DESIGN
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2017
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IF 4.364
Puhong Wen,Lili Ai,Fenyan Wei,Dengwei Hu,Jingjing Guo,Fangyi Yao,Taotao Liu
The crystalline hexagonal Nb 2 O 5 (H-Nb 2 O 5 ) nanobelt clusters dominantly exposed (− 110) facet are firstly synthesized by a hydrothermal topological reaction with a precursor of fiber-like K 2 Nb 2 O 6 ·H 2 O. The structure and morphology of samples obtained at different temperatures and times are investigated. There are two steps in the synthesis process. One is the acid-exchanging reaction transforming into amorphous phase protonated niobate (HNO), and the other is dehydration reaction transforming into H-Nb 2 O 5 , and simultaneous dissolution reaction which forms nanobelt cluster morphology from the fiber-like particle. The formation mechanism of H-Nb 2 O 5 nanobelt clusters has been proposed in detail. After photo-reduced reaction between the H-Nb 2 O 5 nanobelt clusters and AgNO 3 solution, the dominantly exposed (− 110) facet of H-Nb 2 O 5 nanobelt is homogeneously covered by Ag nanoparticles . The photo-electrochemical performance of the obtained H-Nb 2 O 5 nanobelt clusters and Ag deposited H-Nb 2 O 5 (Ag-Nb 2 O 5 ) nanobelt clusters as photocatalysts are evaluated by splitting water under simulated sunlight illumination, and the generated photocurrent of Ag-Nb 2 O 5 sample is 10.73 μA, which is 535 times that of the H-Nb 2 O 5 sample. The results demonstrate that the Ag-Nb 2 O 5 nanobelt clusters have a high photo-electrochemical performance as well as good sunlight photoelectric conversion efficiency.
研究领域:
材料科学
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纳米科技
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光催化
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能源化学
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半导体材料
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电化学
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太阳能转换
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Xin Wen,Guiqiang Fei,Xue Jiang,Kuan Wang,Mei-Jie Shi,Zhen-Hong He,Weitao Wang,Huan Wang,Xiaojuan Lai,Zhao-Tie Liu
A heterostructured Ag/Cu 2 O-ZrO₂ catalyst was synthesized via an interface engineering strategy. • The Ag/Cu 2 O-ZrO₂ possesses a substantial number of Cu-O-Zr heterointerfaces with dispersed Ag sites • The optimized Ag/Cu 2 O-ZrO₂ catalyst demonstrates exceptional CO₂-to-C 2 fuels conversion performance. • Possible mechanism for boosting electroreduction of CO 2 reduction was proposed. • The present work sheds light on the customization of interfacial engineering with dispersed active sites. The efficient electrocatalytic reduction of carbon dioxide (CO 2 ) into multi‑carbon (C 2+ ) products is critical for sustainable carbon management, yet remains limited by poor selectivity and sluggish C C coupling kinetics. Herein, a heterostructured Ag/Cu 2 O-ZrO 2 catalyst was synthesized via an interface engineering strategy to promote C 2 production during CO 2 electroreduction. The incorporation of highly dispersed Ag nanoparticles and ZrO 2 domains onto Cu 2 O nanocrystals generates abundant Cu-O-Zr heterointerfaces, which synergistically regulate the local electronic environment and intermediate conversion behavior. In this catalytic system, the dispersed Ag sites act as efficient *CO-generating centers to enrich local CO coverage, while the Cu-O-Zr interfacial domains stabilize oxygen-containing C C coupling intermediates and facilitate their subsequent hydrogenation toward C 2 products. Benefiting from the tandem synergy between CO enrichment and interfacial intermediate stabilization, Ag/Cu 2 O-ZrO 2 catalyst achieves a high C 2 Faradaic efficiency of 78.2% and a C 2 partial current density of 17.1 mA·cm −2 at −1.3 V vs. RHE, outperforming Cu 2 O and Cu 2 O-ZrO 2 counterparts. In situ infrared spectroscopy reveals the efficient evolution of key intermediates from *COOH to *CO and subsequently to *OCCO during electrocatalysis. Meanwhile, DFT calculations demonstrate that Ag promotes *CO accumulation and suppresses its premature desorption, whereas the Cu-O-Zr interface stabilizes *OCCO and *CHCHO intermediates and lowers the corresponding energy barriers for C 2 formation. This work provides mechanistic insights into tandem interface engineering for selective CO 2 electroreduction toward multi‑carbon fuels through the spatially cooperative regulation of CO generation and C C coupling pathways. Download: Download high-res image (321KB) Download: Download full-size image
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JOURNAL OF LUMINESCENCE
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2026
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IF 3.8
Shuya Ning,Chi Zhang,Naming Zhang,Jin Huang,Kunping Guo,Tao Lei,Fanghui Zhang
Development of efficient fluorescence resonance energy transfer (FRET) is essential for application in optoelectronic and sensing technologies. In this work, we synthesized silica-coated silver nanoparticles (Ag@SiO 2 core-shell NPs) with different shell thicknesses and investigated their effect on a FRET system composed of CsPbBr 3 nanocrystals (NCs) and red dye 4-(Dicyanomethylene)-2-tert-butyl-6-[1,1,7,7-tetramethyljulolidin-4-yl-vinyl]-4H-pyran (DCJTB). Compared to the nanoparticle-free system, doping the CsPbBr 3 : DCJTB system with Ag@SiO 2 core-shell NPs of optimal shell thickness enhanced the fluorescence emission intensity to 3.5 times that of the nanoparticle-free FRET system and improved the FRET efficiency from 28% to 75%. Moreover, the Ag@SiO 2 NPs with the optimal shell thickness can more effectively enhance FRET efficiency than the bare Ag NPs. It is attributed to the fact that the Ag@SiO 2 core-shell NPs can simultaneously avoid quenching effect and effectively enhance the FRET efficiency through the plasmonic properties. This study provides an effective approach for designing highly efficient FRET system and offers a pathway for further enhancing the performance of optoelectronic devices.
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TALANTA
·
2023
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IF 6.1
Jianxia Cheng,Zhiyang Zhang,Longfei Zhang,Jiaqi Miao,Yan Chen,Rongfang Zhao,Meichun Liu,Lingxin Chen,Xiaoyan Wang
Making metal nanoparticle aggregates is a common way to improve surface-enhanced Raman scattering (SERS) enhancement via the formation of hot spots between nanoparticles . Here, we propose a “freeze-thaw-ultrasonication” method to obtain stable colloidal Ag nano-aggregates (AgNAs) with controllable sizes, which can remain stable for a few days. Compared with other method using aggregation reagents (e.g., organic molecules and salt), this method can maintain metal surface charges and adsorption affinity, which ensures the excellent SERS stability and sensitivity. The SERS detection window during the experiment can reach more than 25 min, which makes it a prerequisite for accurate SERS detection during a long-time range. Combining the obtained stable AgNAs with microfluidic devices, we established a sequential SERS on-line continuous detection method for the high-throughput detection of multiplex samples. The UV-Fenton degradation process of methylene blue (MB) is continuously on-line monitored through this platform, which is more sensitive than the UV–Vis Spectrum. Moreover, we have realized the sensitive and accurate detection of 5-nitro-8-hydroxyquinoline (5-NQ) with antibacterial and anticancer activities based on chloride-functionalized silver , which paved a way for SERS high-throughput analysis in bioanalysis and other fields.
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PubMed
高影响因子
ACS Applied Nano Materials
·
2023
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IF 5.9
Wenwen Fu,Wentong Yang,Chen Qian,Yaqin Fu,Yaofeng Zhu
Heterointerfaces in microwave absorption materials can induce dielectric polarization relaxation for superior microwave absorption capacity. Nevertheless, the construction of favorable hierarchical structures in dielectric heterogeneous materials remains a considerable challenge. Herein, Ag/AgCl heterojunction (HAg) nanoparticles are successfully decorated on polyaniline (PANI)/graphene oxide (GO) sheets through simple one-pot interfacial polymerization. The synthesized HAg/PANI/GO hybrid exhibits superior microwave absorption performance due to the multi-heterogeneous and hierarchical structures, which provides numerous interface polarizations, dipolar relaxations, and improved impedance matching. The minimum reflection loss of the optimum HAg/PANI/GO hybrid reaches −61.14 dB at 11.32 GHz with an effective absorption bandwidth of 4.77 GHz in the range from 9.70 to 14.47 GHz. This work provides ideas for producing multi-heterogeneous and hierarchical structures to reach a high microwave absorption performance.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Minghua He,Zulhumar Turup,Xuekun Jin,Fengjuan Chen
MnO 2 is considered to be one of the most promising electrocatalysts for oxygen reduction reactions (ORR) in alkaline media and can be applied to various electrochemical energy conversion and storage devices. However, it is limited by the relatively slow kinetics of the cathodic electrochemical reactions . In addition, it is difficult to control the presence state of Ag during the modification of MnO 2 . To this end, an efficient ORR electrocatalyst of Ag nanoparticles supported by MnO 2 nanorods was successfully synthesized by using NH 3 ·H 2 O as a complexing agent to inhibit the Ag + intercalating into the tunnels of MnO 2 . The half-wave potential ( E 1/2 ) and limiting current density ( J lim ) of the obtained Ag/MnO 2 electrocatalysts are 0.81 V and −5.6 mA cm −2 , respectively, showing comparable ORR catalytic activity to commercial Pt/C catalysts. The excellent catalytic performances can be attributed to the presence of abundant oxygen vacancies and Mn 3+ species on the MnO 2 surface, as well as the synergistic effect between MnO 2 substrates and Ag nanoparticles. Among them, oxygen vacancies enhances the adsorption of O 2 , Mn 3+ facilitates the displacement of O 2 2− /OH − , MnO 2 inhibits the accumulation of peroxide species to improving the oxygen environment on the Ag surface and Ag accelerates the electron transfer in the whole process. This work provides a useful guide for the design of efficient Mn-based ORR electrocatalysts.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2023
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IF 6.2
Huasheng Lai,Gongke Li,Zhuomin Zhang
A bioinspired Au@Ag nanodome-cones array (Au@Ag NDCA) surface-enhanced Raman scattering (SERS) chip was developed for efficient residue analyses of food samples. The cicada wing inspired Au@Ag NDCA chip was fabricated by a bottom-up method, Au nanocones array was firstly grown onto nickel foil by displacement reaction and cetyltrimethylammonium bromide guidance growth, and then silver shell with controllable thickness was coated onto the Au nanocones array by magnetron sputtering . The Au@Ag NDCA chip exhibited good SERS performances with high enhancement factor of 1.2 × 10 8 , good uniformity with relative standard deviation (RSD) less than 7.5% (n = 25), good inter-batch reproducibility with RSD less than 9.4% (n = 9), and long-term stability over 9 weeks. By adapting a minimized sample preparation, Au@Ag NDCA chip combined with a 96-well plate could realize high-throughput SERS analyses of 96 samples with average analysis time less than 10 min. The substrate was applied for quantitative analyses of two food projects. One was 6-benzylaminopurine auxin residue in sprout samples with detection limit of 38.8 μg/L, recoveries of 93.3–105.4% and RSDs of 1.5–6.5%, and the other was an edible spice of 4-amino-5,6-dimethylthieno (2,3-d) pyrimidin-2(1H)-one hydrochloride additive in beverage samples with detection limit of 18.0 μg/L, recoveries of 96.2–106.6% and RSDs of 3.5–7.9%. All the SERS results were well confirmed by conventional high-performance liquid chromatographic methods with relative errors less than 9.7%. The robust Au@Ag NDCA chip exhibited good analytical performances possessed great potential for convenient and reliable analyses of food quality and safety.
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PubMed
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