TALANTA
·
2026
·
IF 6.7
Yue Liu,Yu Wu,Lihan Feng,Xinyi Zhang,Jihui Lang,Qi Zhang,Naveen Reddy Kadasala,Wenshi Zhao,Yang Liu
Ciprofloxacin (CIP) is widely utilized for the treatment of bacterial infections due to its broad-spectrum antibacterial properties; however, excessive residues inevitably cause environmental pollution. Therefore, the development of sensitive and accurate analytical methods for CIP detection remains important. Herein, a novel self-cleaning surface-enhanced Raman scattering (SERS) sensor was fabricated for the ultrasensitive and specific detection of CIP. ZnFe 2 O 4 -Cu 2 O-Au@Ag (ZCAA) nanocomposites (NCs) were synthesized by decorating ZnFe 2 O 4 -Cu 2 O with various amounts of Au@Ag nanocrystals, thereby integrating dual functions of pollutant detection and photocatalytic degradation. Finite-difference time-domain (FDTD) simulation was adopted to elucidate the correlation between Au@Ag loading density and SERS performance. After modification with molecular imprinted polymers (MIPs), the prepared ZnFe 2 O 4 -Cu 2 O-Au@Ag-MIPs (ZCAA-MIPs) exhibited robust anti-interference capability, enabling specific detection of CIP even in the presence of structurally similar antibiotics such as tetracycline (TC) and oxytetracycline (OTC). A limit of detection (LOD) of 9.3 × 10 −11 M was achieved in aqueous media. Furthermore, the sensor successfully identified trace CIP on the epidermal surfaces of river snail, demonstrating its practical applicability in real-world samples. Time-resolved photoluminescence (TRPL) and X-ray photoelectron spectroscopy (XPS) analyses revealed that the synergistic interaction between the ZnFe 2 O 4 -Cu 2 O heterojunction and Au@Ag nanocrystals accelerated charge carrier migration and optimized interfacial charge transfer. Density functional theory (DFT) calculations further verified the superior degradation capacity of ZCAA substrate. Benefiting from its intrinsic magnetic properties, ZCAA-MIPs sensor was easily recycled under external magnetic field and retained stable SERS performance after five consecutive recycling cycles. This magnetic MIPs-SERS sensor provides a reliable and sustainable platform for monitoring CIP residues in complex water environments.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Naiqiang Wang,Xiaoqing Si,Hanyue Ding,Zhihu Zhang,Jianwei Gao,Shaletanati Ake,Xuexue Li,Chun Li,Junlei Qi,Jian Cao
Reliable ceramic-metal joining is essential for the construction of protonic ceramic fuel cell (PCFC) stacks, yet joint failure still occurs on the electrolyte ceramic side. For the first time, this study proposes a femtosecond laser-enabled multiscale interface engineering strategy to promote the sintered-joining between BaZr 0.4 Ce 0.4 Y 0.1 Yb 0.1 O 3-δ electrolyte and Crofer 22 APU interconnect. The method enables the formation of microscale grooves (15 μm width and 2.5 μm depth), nanoscale clusters (ranging from several tens to hundreds of nanometers), and oxygen vacancies (concentration increased by 100 %) at a laser power of 12 mW. The resulting hierarchical interface architecture markedly promotes effective sintering of the micro-Ag particle interlayer. Under optimized conditions (930 °C, 1 MPa, 30 min), the resulting joints are defect-free and exhibit exceptional durability in humid oxidative environments. The shear strength reaches 42.8 MPa, representing a 97 % improvement over untreated samples. The multiscale enhancement mechanism is systematically elucidated. First-principles calculations further reveal a novel atomic-scale joining mechanism: laser-induced oxygen vacancies trigger localized Jahn-Teller distortion of the crystal field, thereby enhancing the d-p orbital hybridization between the coordinating O and Ag. This femtosecond laser-driven interface engineering strategy offers a robust and scalable solution for high-performance ceramic-metal integration in advanced energy systems.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Guanshun Xie,Le Liao,Zhaohui Huang,Jie Wang,Senlin Zhang,Kunjie Wang,Ruoning Zhan,Peng Zhang,Benhua Xu,Xiuqiang Xie,Nan Zhang
In pursuing efficient photocatalytic systems, nature-inspired photocatalysis has emerged as a promising strategy to optimize charge transfer and surface reactions. Inspired by the structure and function of plant leaves, a leaf-like hierarchical heterostructure is constructed. ZnIn 2 S 4 nanosheet arrays are anchored on the integrated Ag nanowires network with Ti 3 C 2 T x MXene support, during which process sulfur vacancies (V S ) are formed due to the anti-strong metal-support interaction. The ZnIn 2 S 4 nanosheet arrays supported by Ti 3 C 2 T x serve as mesophyll to absorb photons and convert solar-to-chemicals, the Ag nanowires embedded in the interface of ZnIn 2 S 4 and Ti 3 C 2 T x function as veins to shuttle the charge carriers for the surface redox reactions, and the V S on ZnIn 2 S 4 resemble stomata to facilitate the adsorption of reactants. Furthermore, the formed V S are able to reduce the thermodynamic barriers in photocatalytic reactions. The synergistic effect of these functional components enables hydrogenation of several nitroaromatic compounds, and exhibits a photocatalytic H 2 evolution rate of 1119.4 µmol g⁻¹ h⁻¹ under visible-light irradiation, which is ≈7.9 times as high as that of pure ZnIn 2 S 4 . This study highlights the pivotal role of functional design inspired by nature in advancing solar-to-chemical conversion and paves the way for the development of next-generation photocatalysts in green chemistry and H 2 energy applications.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Xinyu Lan,Tingting Liu,Jianjun Li,Jian Zhu,Junwu Zhao,Guojun Weng
Silver coated gold nanobipyramids (Au NBPs@Ag) have opened up a wide range of applications in sensing based on the etching, due to the fact that a tiny change in shape or composition could directly lead to optical changes. Here, we developed an ultrasensitive surface-enhanced Raman scattering (SERS) method for S 2− sensing by using Au NBPs@Ag as nanoprobes. This strategy was revealed to be related to the redox reaction between S 2− and the silver nanoshell of the Au NBPs@Ag. The silver nanoshell was gradually etched as the S 2− concentration was gradually increased. Meanwhile, the generated Ag 2 S was secondary deposited on the surface of etched Au NBPs@Ag. Thus, the etching of silver shell and secondary deposition of Ag 2 S induced SERS decrease of the nanoprobes, which was not only highly selective toward S 2− but also showed a linear logarithmic dependence on S 2− concentrations from 10 −5 to 10 −8 M, with a limit of detection (LOD) of 4.7 × 10 −8 mol/L. Spike recovery tests in tap water demonstrated recoveries of 104.00%, 98.86%, and 105.32% with relative standard deviations (RSD) between 2.52% and 3.98%, validating high accuracy for S 2− detection. This approach provided a novel SERS strategy for trace sulfide monitoring in drinking water systems.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.6
Yuxuan He,Jiayi Wei,Ming Cai,Junpeng Xia,Boheng Song,Jinxin Cheng,Xuanyu Sha
The performance of surface-enhanced Raman scattering (SERS) hinges on plasmonic hot spots that are both abundant and spatially uniform. Here, we propose a ligand-regulated, interface-confined growth strategy: on a bowl-like mesoporous polydopamine (PDA) scaffold, the ammoniacal silver precursor [Ag(NH 3 ) 2 ] + first forms a surface coordination layer with catechol and amine sites on PDA, lowering the activity of free Ag + and enriching Ag(I) at the interface, thereby shifting nucleation from homogeneous in the bulk to interface-confined. The ensuing constrained growth suppresses coalescence/bridging and excessive coarsening, yielding Ag nanoparticle arrays with controlled size, tunable interparticle gaps, and high spatial uniformity, and producing dense yet discrete coverage across both the inner and outer interfaces of the bowl. The concave curvature and dual-interface connectivity provide continuous coupling pathways and abundant adsorption sites, establishing a three-dimensional continuous hot-spot network. Correlative multi-technique characterization and spectroscopic analyses (SEM, EDS mapping, UV–Vis, XPS) elucidate the structure-optical-performance relationship, revealing a sparse-to-dense optimal regime and a coalescence-induced degradation regime, and identifying a precursor concentration of 50 mM as the optimal window. The resulting substrate exhibits good reproducibility for R6G (RSD ≈ 10.99 %) and affords clear molecular fingerprinting and linear quantification for pesticide analysis, with limits of detection of 55 ng mL −1 for methyl parathion and 0.209 ng mL −1 for thiram. This template-free, mild, and generalizable strategy provides a scalable route to three-dimensional plasmonic SERS substrates, leveraging PDA surface chemistry to prevent Ag aggregation at the source while constructing continuous hot spots networks.
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PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Ke Zhang,Yijie Su,Guiyun Wang,Daolai Sun,Satoshi Sato
Vapor-phase dehydration of 1,2-propanediol to form propanal was performed over H 3 PO 4 /SiO 2 catalyst with Brønsted acid sites, which exhibited a high activity for the formation of propanal , and the successive modification of H 3 PO 4 /SiO 2 by WO 3 and Ag could further improve both the activity and the stability of catalysts. The H 3 PO 4 /SiO 2 catalyst modified by both Ag and WO 3 could provide a propanal selectivity of 94.6% with a complete conversion of 1,2-propanediol in an H 2 flow at 250 °C and a weight hourly space velocity of 2.70 h −1 . Brønsted acid sites were effective for the formation of propanal, and the doping of WO 3 could significantly increase the amount of Brønsted acid sites, resulting in the improvement of catalytic activity. On the other hand, the doping of Ag could protect the Brønsted acid sites and inhibit coke deposition on the catalyst surface in an H 2 atmosphere, leading to the improvement of catalyst stability.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2020
·
IF 3.442
Song Chen,Juan Du,Lulu Shen,Weiyi Chen
Hierarchical materials are of great interest toward the development of catalysts because of their unique structures and large specific surface area. In this study, Ag-decorated TiO 2 (TiO 2 @Ag) nanowire nanofibers (NW NFs) were synthesized via the in situ decoration of Ag nanoparticles (NPs) on hierarchical TiO 2 NW NFs and their microstructure and catalytic activity for the removal of 4-nitrophenol were evaluated. TiO 2 NW NFs were first synthesized via the hydrothermal reaction of the electrospun TiO 2 NFs in a concentrated NaOH solution and then hydrothermally treated in a AgNO 3 solution to form the TiO 2 @Ag NW NFs. SEM observations showed that the TiO 2 @Ag NW NFs were assembled from numerous TiO 2 NWs subunits and exhibited a hierarchical and fibrous morphology with diameters in the range of 1–2 μm and lengths of tens of micrometers. TEM observations showed that many Ag NPs with diameters in the range of 4–10 nm were well grown on each TiO 2 NW with diameters of 20–40 nm. It was found that the TiO 2 @Ag NW NFs showed catalytic activity for the removal of 4-nitrophenol (4-NP), a representative contaminant. The catalytic removal efficiency of 4-NP by the TiO 2 @Ag NW NFs in the presence of visible light irradiation (0.639 min −1 ) was 3.2-fold higher than that in the absence of light irradiation (0.199 min −1 ), indicating that the TiO 2 @Ag NW NFs exhibit visible light-enhanced catalytic activity.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2014
·
IF 6.007
Xu Yan,Xiyou Wang,Wei Gu,MiaoMiao Wu,Yan Yan,Bo Hu,Guangbo Che,Donglai Han,Jinghai Yang,Weiqiang Fan,Weidong Shi
Single-crystalline AgIn(MoO 4 ) 2 nanosheets have been successfully fabricated by facile hydrothermal method without any surfactants. Subsequently, Ag/AgBr-grafted AgIn(MoO 4 ) 2 nanosheets were synthesized by the in situ photoreduction of AgBr/AgIn(MoO 4 ) 2 composites prepared by a deposition–precipitation method. Under visible light irradiation. The Ag/AgBr/AgIn(MoO 4 ) 2 composites exhibit a strong absorbance in the visible region because of the surface plasmon resonance absorption of Ag nanocrystals. Compared with bare AgIn(MoO 4 ) 2 nanosheets, Ag/AgBr nanoparticles and Ag/AgIn(MoO 4 ) 2 composites, a dramatic enhancement in the degradation rate of tetracycline (TC) is observed over the Ag/AgBr/AgIn(MoO 4 ) 2 composites. The immense enhancement of the photocatalytic activity is attributed to the extended absorption in the visible-light region, effective charge separation, and synergistic enhancement induced by surface plasmon resonance (SPR) in the heterostructured Ag/AgBr/AgIn(MoO 4 ) 2 . This study provides new insight into the fabrication of highly efficient and stable ternary metal molybdate based plasmonic photocatalysts and facilitates their practical application to solve environmental issues. The mechanism for the photodegradation of TC over Ag/AgBr/AgIn(MoO 4 ) 2 is discussed in detail.
研究领域:
材料科学
·
环境化学
·
光催化
·
纳米材料
·
无机化学
·
物理化学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yi Ma,Yuanyuan Du,Ying Chen,Chenjie Gu,Tao Jiang,Guodong Wei,Jun Zhou
Aiming to realize a reliable quantification multiphase surface-enhanced Raman scattering (SERS) detection, we designed and synthesized a novel flexible and transparent SERS substrate based on PDMS film modified with forest of Ag/Au nanowires (NWs) through two steps of seed-mediated growth and magnetron sputtering coating. Owing to the flexibility of the polymer matrix, the SERS activity of the Ag/Au NWs/PDMS film was improved by a mechanical stretch strategy, showing a remarkable enhancement factor of 6.74 × 10 6 . Moreover, the versatile hybrid SERS substrate could be utilized to trace pesticides under various conditions. The monitoring of 2-naphthalenethiol with limit of detection (LOD) of 10 −9 M in atmosphere, the detection of methyl parathion (MP) with LOD of 10 −6 mg/mL on the surface of tomato, and the identifying of MP with LOD of 10 −5 mg/mL in soybean oil were all effectively realized. Particularly, the poor linear relationships in the three detections were significantly corrected to guarantee the quantitative analysis by using the intrinsic SERS peak of PDMS as internal standard. The multifunctional Ag/Au NWs/PDMS film developed here is expected to find great potential practical applications in rapid and sensitive on-site monitoring of food and environmental security.
研究领域:
分析化学
·
纳米材料
·
传感器
·
食品安全
·
环境监测
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2026
·
IF 4.9
Lin Gao,Chunjian Ai,Liang Liang,Xiuying Li,Xue Lin,Junyou Shi
Photocatalytic technology represents an effective and cost-efficient approach to the degradation of organic pollutants. This paper presents an investigation into the degradation ability of ms -BVO/TCN/Ag composite for organic pollutants at different ratios. The 7.5% ms -BVO/TCN/Ag sample was observed to exhibit the most effective degradation performance under visible light irradiation, with degradation rates of 83.12% and 84.45% for TC and DEP in 120 min. This is attribute to the distinctive tubular configuration of TCN, which enhances the number of reactive sites. The addition of Ag nanoparticles to TCN expands the light absorption spectrum of TCN through the surface plasmon resonance (SPR) effect. Furthermore, the construction of Z-scheme heterojunctions between TCN/Ag and ms -BVO preserves the robust redox capabilities of these components while mitigating the rapid complexation of photogenerated electron pairs. This paper presents a novel strategy and approach for the further construction of heterojunctions, based on the morphological control of carbon nitride.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Zijie Qu,Shihan Yu,Miao Li,Yumeng Chen,Xia Liu,Xia Zhang,Guodong Zhang,Xiufeng Wang,Fang Wang,Zhiqing Zhang,Ting Zhou
This study designed and synthesized a Fe 3 O 4 @PDA@Ag-Au NPs nanocatalyst featuring a “core-shell-satellite” structure, aimed at efficiently reducing 4-nitrophenol through photothermal catalysis. Under 808 nm near-infrared laser irradiation, the material demonstrated exceptional photothermal performance and catalytic activity. The reduction rate of 4-nitrophenol reached 90.35 %, with a reaction rate constant of 0.1397 min −1 , significantly surpassing that of a water bath heating system at the same temperature. The high efficiency was attributed to two synergistic effects: the photothermal conversion facilitated by the polydopamine shell and the unique resonance effect exhibited by Ag-Au bimetals. This synergy elevated the system’s equilibrium temperature to 50.7 °C (12.8 °C higher than that of pure water) and generated active site pairs on the Ag-Au interface. These sites enhanced critical reaction steps, thereby reducing the activation energy to 13.8 kJ·mol −1 ,a reduction of 24.0 % compared to that observed in the water bath system (18.3 kJ·mol −1 ). This catalyst could be easily recovered using magnets and maintained over 90 % efficiency after seven cycles. By integrating photothermal catalysis, bimetallic synergy, and magnetic separation, this study presents a novel strategy for developing efficient and recyclable catalysts with significant potential for addressing nitroaromatic organic pollutants.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 40
·期 2
·1685-1692
·
IF 3.086
Min Hong,Lidan Xu,Fangli Wang,Shuling Xu,Haibo Li,Chen-zhong Li,Jifeng Liu
Graphene oxide-supported hollow Au–Ag alloy nanocages (AuAgNC/GO) with tunable shell composition were in situ fabricated by employing a galvanic replacement reaction (GRR) between HAuCl4 and Ag nanoparticles loaded on graphene oxide nanosheets (AgNP/GO). AgNPs on the graphene oxide nanosheets were first synthesized as sacrificial templates by the microwave method. The as-synthesized hybrid materials were characterized by TEM, EDX, HAADF-STEM, XRD and XPS. On the well-known 4-nitrophenol (4-NP) reduction to 4-aminophenol (4-AP) in the presence of excess borohydride, AuAgNC/GO as a solid phase heterogeneous catalyst has been investigated, which exhibited a short induction time, high catalytic activity and good stability against agglomeration for the reduction.
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