ANALYTICA CHIMICA ACTA
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2026
·
IF 6.1
Zhuorong Fan,Xiaojing Xu,Jixian Luo,Zimeng Lei,Wenjuan Dong,Wenting Liang,Shengmei Song,Xiaojuan Gong
Background Red-emitting carbon dots (R-CDs), characterized by their long-wavelength fluorescence in the red spectral region, offer significant advantages as fluorescent probes due to their capacity to effectively mitigate light scattering and suppress autofluorescence interference from biological matrices. This inherent optical property positions them as one of the most promising candidates for high-contrast bioimaging and sensitive sensing applications. Herein, a novel type of highly luminescent R-CDs was synthesized via a tailored precursor design and doping strategy. Their potential as advanced fluorescent probes was systematically evaluated, focusing on their exceptional optical properties, photostability, and responsiveness to specific substances. Results The emitting of R-CDs exhibits strong pH sensitivity in the range of 1.5-4.0, enabling monitoring of extremely acidic environments. Additionally, R-CDs were employed as probes to develop a multi-mode sensing platform integrating ratiometric fluorescence, ratiometric colorimetry, and smartphone-based imaging for Ag + detection. Fluorescence mode: Ag + selectively quenches the red emission of R-CDs, while yellow emission of Cu-CDs remains stable. Quantification detection relies on the I 624 /I 550 ratio, with a linear range of 0–185.3 μM and LOD of 0.266 μM. Colorimetry mode: Ag + -induced aggregation of the R-CDs weakened the original absorption band and generates a new peak at 680 nm, enabling detection via the A 680 /A 610 ratio with a linear range of 0–208.0 μM and LOD of 0.398 μM. Moreover, the R-CDs solution undergoes a distinct color change under exposure to Ag + ; by leveraging smartphone-based color recognition, a portable visual sensing platform has been successfully constructed. Significance In this work, the synthesis of R-CDs provides a strategic reference for developing high-performance, multicolor-tunable, and function-oriented doped CDs. The multi-mode sensing platform achieves functional complementarity and data cross-validation, thereby improving the reliability, anti-interference capability and on-site applicability of detection. Analytical robustness is further enhanced by the ratiometric strategy's built-in reference signal, which effectively compensates for instrumental, environmental, and operational variables. This design strategy features universal principles and demonstrates strong potential across a wide range of applications.
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RSC Advances
·
2026
·Vol. 16
·期 16
·14123-14134
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IF 6.1
Wanwan Liu,Huabin Li,Jingjing Xu,Shuangquan Wu,Zhidong Chen
In the field of self-powered sensing, the demand for materials with enhanced wearing comfort and superior flexibility has become increasingly prominent, driven by the rapid advancement of wearable electronics and intelligent monitoring technologies. Although piezoelectric ceramics exhibit exceptional piezoelectric performance, their inherent brittleness and poor deformability severely restrict their practical applicability in flexible self-powered sensors. In pursuit of addressing the requirement for improved wearing comfort while retaining efficient energy conversion capability, elastomer-based composite fibers have emerged as a promising class of materials and developed rapidly in recent years. Nevertheless, a critical challenge remains in achieving uniform dispersion of fillers within the polymer matrix and the fabrication of defect-free composite fibers under high filler loading, primarily due to the significant surface energy discrepancy between the fillers and the polymer matrix. In this work, a novel thermoplastic polyurethane (TPU) based composite piezoelectric fiber with strong organic–inorganic interfacial adhesion and uniform high-content filler dispersion was proposed, achieved by interfacial modification of PZT and in situ reduced Ag nanoparticles (AgNPs) into TPU via wet spinning for flexible wearable piezoelectric sensors. Notably, even at total inorganic filler loadings surpassing 80 wt%, the resultant composite fibers maintain outstanding mechanical properties, with breaking strength >10 MPa and elongation at break >200%. When optimized with 80 wt% PZT and 3 wt% Ag precursor, the composite fibers, after weaving into fabrics and corona polarization, exhibit ultrahigh piezoelectric output sensitivity of 133 ± 2.1 mV N−1 and ultrafast response time (≈20 ms). This work offers a scalable fabrication route for high-performance piezoelectric fibers, which is helpful for self-powered sensors with better performance and more comfortable use in human motion monitoring and recognition.
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Journal of Materials Chemistry A
·
2026
·
IF 9.2
Yueling Chen,Shibin Zheng,Xingci Huang,Zhangtong Zhang,Guocheng Huang,Qiaoshan Chen,Ling Wu,Jinhong Bi
Covalent organic frameworks (COFs) have emerged as promising candidates for photocatalytic CO2 reduction. While the introduction of single metal atoms can enhance activity, most reported COF-single atoms catalysts adopt near-planar coordination environments that confine carrier migration largely within individual layers, imposing high interlayer transfer barriers and sluggish kinetics and consequently hindered overall performance. This work constructed a single-atom Ag-modified covalent organic framework (Ag-COF) by confining isolated Ag atoms within a spherical TD-COF scaffold, thereby wiring adjacent layers into efficient interlayer charge-transfer channels for gas-solid CO2 photoreduction. Under visible light and without sacrificial agents, Ag0.15-COF delivered a CO formation rate of 184.05 μmol·L-1 with near-unity CO selectivity, representing a tenfold improvement over pristine TD-COF. Structural and photoelectronic analyses identified the N-Ag-N bridging motifs that lowered the interlayer electron-transfer barrier, accelerated carrier separation/migration, and tuned the local electronic structure of active sites. In situ spectroscopy combined with thermodynamic calculations further revealed that the strengthened interlayer charge flow enhanced CO2 adsorption/activation and markedly reduced the barrier for forming the key *COOH intermediate. This study elucidates, at the atomic scale, how interlayer charge transfer governs the activity and selectivity, and provides a design blueprint for highly efficient single-atom-modified COF photocatalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Chenlong Wang,Yifan Zu,Jun Natsuki,Jing Xu,Xueting Zhai,Chenhong Lang,Xiaojuan Li,Toshiaki Natsuki,Wenqi Nie
Hydrated vanadium pentoxide (VOH) is regarded as a promising cathode material for aqueous zinc-ion batteries (AZIBs) owing to its open layered framework and multivalent redox chemistry. However, its practical application is limited by sluggish charge-transfer kinetics and structural instability during repeated Zn²⁺/H⁺ insertion and extraction. Herein, an integrated AgNP@MX-VOH composite cathode is constructed by coupling VOH nanorods with Ag nanoparticle-decorated Ti₃C₂Tₓ MXene. The flexible MXene sheets provide continuous electron-transport pathways and bridge neighboring VOH nanostructures, while the dispersed AgNPs act as local conductive contact nodes and regulate the stacking configuration of the MXene assembly. This hierarchical interfacial network helps suppress MXene restacking, maintain accessible porous regions, and improve the structural and electrical stability of the conductive framework. Meanwhile, the formation of the AgNP@MX-VOH heterointerface modifies the local electronic environment of VOH, accompanied by an increased V⁴⁺ contribution and enhanced oxygen-defect-related features.These structural and interfacial effects facilitate charge transfer and reversible ion-storage kinetics while maintaining electrode integrity during cycling. Consequently, the AgNP@MX-VOH cathode delivers a high reversible capacity of 361.2 mAh g⁻¹ at 0.5 A g⁻¹ , a capacity of 268.96 mAh g⁻¹ at 5 A g⁻¹ , and 90.2% capacity retention after 1000 cycles at 5 A g⁻¹ . This work provides an interfacial-engineering strategy for constructing stable MXene/vanadium-oxide heterostructures toward durable aqueous zinc-ion storage.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
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IF 8.7
Xingyue Liu,Wen Deng,Liucheng Meng,Jianfeng Xi,Chaofeng Zhang,Jinlan Cheng,Lei Zhang,Huining Xiao,Weibing Wu
Conventional synthetic routes to Ag nanocubes (AgNCs) often leave reagent residues on the particle surface, thereby compromising analyte accessibility and surface-enhanced Raman scattering (SERS) sensitivity. Here, AgNCs were grown in-situ on two-dimensional (2D) nanocellulose films via a photo-induced reduction process, yielding surfactant-free particles with tunable morphology. No additional reducing agents or surfactants were introduced during synthesis, reducing surfactant-derived surface coverage and improving the accessibility of the resulting AgNCs. Notably, the dissolved oxygen in the reaction solution played an important etching role in eliminating the twins during the nucleation process and generating AgNCs with a single crystal structure. The nanocellulose film served both as a photo-reactive substrate, where surface hydroxyl groups acted as reductive sites for the photo-induced conversion of Ag(I) to Ag(0), and as a 2D support that stabilized interfacial nucleation and growth. In addition, the in-situ synthesized AgNCs were uniformly distributed across the nanocellulose film surface, enabling one-step fabrication of flexible SERS substrates under mild conditions. The optimized substrate enabled highly sensitive detection of Rhodamine 6G (R6G), with a limit of detection of 6.24 × 10 −12 g L −1 , approximately fivefold lower than that of the same substrate after surfactant adsorption. This strategy provides a simple platform for constructing nanocellulose-based SERS substrates for trace detection.
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Journal of Environmental Sciences
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2026
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IF 6.5
Reshalaiti Hailili,Zongmian Wang,Liyong Ding,Zelong Li,Xinghao Zhang
Surface oxygen vacancies (Vos) in bismuth-based layered photocatalysts are highly active yet prone to deactivation via refilling by ambient oxidants, posing a major stability challenge for their practical application in urban environmental remediation. To address this, Ag nanoparticles were in-situ photodeposited onto Vo-rich Bi 4 Ti 3 O 12 (BTO-Vo) to construct Ag@BTO-Vo- n composites with varied Ag loadings. The optimal catalyst Ag@BTO-Vo-20 displays exceptionally enhanced photocatalytic activity, with both its degradation kinetics and turnover frequency (TOF) reaching levels over 28.5 and 22.7 times higher than those of pristine BTO and BTO-Vo, respectively. This performance improvement originated from optimized charge carrier dynamics, where the synergistic effect of Vos and Ag/BTO-Vo Schottky junction prolonged carrier lifetime by 2.1 times, enhanced photocurrents by 2.7-fold, and reduced interfacial charge-transfer resistance, leading to efficient charge separation. Mechanistic investigations identified superoxide radicals and holes as the primary active species. Crucially, Ag nanoparticles provide effective protection for the surface Vos through interfacial electron modulation and competitive O 2 adsorption, thereby inhibiting their deactivation and ensuring catalyst stability. This was further validated by comparative EPR analysis of H 2 O 2 -filling experiment. This work elucidates a dual stabilization mechanism where Ag crucially prevents the healing of surface Vos, offering a strategic pathway to design durable and highly active layered photocatalysts for efficient purification of urban environmental pollutants.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 7
·1-14
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IF 5.3
Gao Yueming,Weng Guojun,Li Jianjun,Zhu Jian,Zhao Junwu
A flexible silver triangular nanoplate (Ag TNPs)@m-phenylenediamine (mPD)@polyacrylonitrile (PAN) skin patch based on electrospinning is fabricated and applied to detect human beta-defensin 2 (HBD-2) by using surface-enhanced Raman scattering (SERS). First, PAN was used as the base material to create a fibrous membrane through electrospinning. The fibers were then modified with Ag TNPs by mPD endowing positive charges, forming a flexible Ag TNPs@mPD@PAN substrate. The flexible substrate features advantages of simple preparation, low cost, and convenient portability, which are suitable for in situ rapid detection on irregular surfaces. The combination of the flexible Ag TNPs@mPD@PAN substrate with Ag TNPs probes enabled the specific detection of HBD-2. It demonstrated satisfactory sensitivity and reproducibility with a wide detection range of 100–10 ng/mL and a limit of detection (LOD) of 59.57 fg/mL. Eventually, the flexible substrate was applied to HBD-2 detection on the surface of contaminated chicken skin. This study provides a simple and highly sensitive method for the detection of HBD-2, offering a novel approach for the non-invasive rapid diagnosis of psoriasis and the monitoring of disease progression. Graphical
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Chemosensors
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2025
·Vol. 13
·期 10
·368
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IF 3.7
Ding Gu,Jun Dong,Wei Liu,Xiaogan Li
As industrial waste gas, nitrogen dioxide (NO2) is a serious hazard to air pollution and human health, and there is a pressing demand for developing high-performance NO2gas sensors. Tin disulfide (SnS2), a representative two-dimensional metal sulfide characterized by a significant specific surface area, a suitable electron band gap, and an easily tunable layered structure, shows a broad application prospect in gas sensing applications. Nevertheless, SnS2-based gas sensors suffer from poor sensitivity, which seriously hinders their application in room temperature gas sensing. In this study, Ag/SnS2heterojunction nanomaterials were synthesized by an in situ reduction approach. The findings reveals that the gas-sensitive response of the Ag/SnS2nanocomposites at room temperature under visible light irradiation can achieve 10.5 to 1 ppm NO2, with a detection limit as low as 200 ppb, which realizes the room-temperature detection of Sub-ppm NO2. Meanwhile, the sensor exhibits good selectivity, reproducibility (cyclic stability > 95%). The improved gas sensitivity of the Ag/SnS2sensor can be due to the synergistic effect of the carrier separation at the Ag/SnS2Schottky junction and the localized surface plasmon resonance (LSPR) of Ag nanoparticles. The LSPR effect significantly enhances light absorption and surface-active site density, facilitating trace NO2detection at room temperature. This study provides the foundation for the subsequent development of room temperature layered metal sulfide gas sensors.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Chenhui Qiu,Lei Wang,Ruijie Chen,Gongde Wu,Jie Zhang,Jing Ding,Jun Li,Jinfeng Zhang,Hui Wan,Guofeng Guan
Synthesizing value-added solar fuels represents a promising solution to address energy and environmental issues. Its efficiency is determined by the performance of photocatalysts, and the main challenges lie in achieving efficient interfacial charge transfer and utilization, which are highly related to the assembly of cocatalysts. Herein, we design La 3+ -defect LaFeO 3 nanofibers with a higher specific surface area to achieve highly dispersed loading of Ag nanoparticles through a one-step coaxial electrospinning technique. Characterizations and theoretical calculations revealed that La 3+ defects favor the anchoring of Ag nanoparticles and the formation of a Schottky junction, thereby facilitating the interfacial charge separation and transfer. Additionally, this synergistic engineering efficiently boosts CO 2 adsorption/activation and strengthens the proton affinity, preferentially driving the multi-electron reduction. Owing to these benefits, the optimized nanofibrous Ag/La 0.9 FeO 3 sample exhibits promising photothermal catalytic performance, yielding CH 3 OH of 7.12 μmol·g -1 ·h -1 , which is 2.8-fold over pristine LaFeO 3 , along with good stability and selectivity. This work highlights the effect of interfacial construction on developing advanced photocatalysts.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
LiHao Yang,QingYang Tang,ShuiMiao Xia,Jie Huang,GuanFei Liu,XuYuan Fan,Davoud Dastan,ZhiCheng Shi
Polymer dielectrics are essential materials for next − generation power systems. However, they suffer from low energy density and poor breakdown performance at high temperatures, which restricts their application in high-temperature fields. The BaTiO 3 /Al 2 O 3 /Ag nanofibers (BT/AO/Ag NFs) were fabricated via electrospinning as nanofillers to boost the high-temperature energy storage of polyetherimide (PEI) composites. Experiments and finite electric field simulations demonstrate that combining high permittivity BaTiO 3 , highly insulating Al 2 O 3 , and metallic Ag improves the dielectric permittivity and breakdown strength of PEI composites at high temperatures. Remarkably, the composite film incorporating merely 0.3 wt% BT/AO/Ag NFs achieves an ultra − high energy density of 9.047 J cm −3 at 200 ℃, representing a 147 % enhancement compared to pure PEI and surpassing most polymer composites filled with alternative nanofillers. Furthermore, this composite exhibits outstanding charge–discharge cycling stability (>100,000 cycles at 200 MV m −1 ) and superior power density (>1.145 MW cm −3 ) at 200 ℃, positioning it as an ideal candidate for high-temperature capacitor applications. The work indicates that this nanofiber architectural design not only provides an effective strategy for developing high-temperature dielectric composites, but also shows great potential in next − generation dielectric capacitors.
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International Journal of Extreme Manufacturing
·
2025
·Vol. 7
·期 3
·035001
·
IF 21.3
Fan-Chun Bin,Xin-Yi Wu,Jie Liu,Xian-Zi Dong,Teng Li,Qi Duan,Jian-Miao Zhang,Katsumasa Fujita,Mei-Ling Zheng
Chitosan (CS)-based nanocomposites have been studied in various fields, requiring a more facile and efficient technique to fabricate nanoparticles with customized structures. In this study, Ag@methacrylamide CS/poly(ethylene glycol) diacrylate (Ag@MP) micropatterns are successfully fabricated by femtosecond laser maskless optical projection lithography (Fs-MOPL) for the first time. The formation mechanism of core-shell nanomaterial is demonstrated by the local surface plasmon resonances and the nucleation and growth theory. Amino and hydroxyl groups greatly affect the number of Ag@MP nanocomposites, which is further verified by replacing MCS with methacrylated bovine serum albumin and hyaluronic acid methacryloyl, respectively. Besides, the performance of the surface-enhanced Raman scattering, cytotoxicity, cell proliferation, and antibacterial was investigated on Ag@MP micropatterns. Therefore, the proposed protocol to prepare hydrogel core-shell micropattern by the home-built Fs-MOPL technique is prospective for potential applications in the biomedical and biotechnological fields, such as biosensors, cell imaging, and antimicrobial.
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Chem Catalysis
·
2026
·
IF 10.7
Haiwei Su,William Orbell,Lijuan Sun,Hongwen Zhang,Haibo Yin,Zhen Chen,Qinqin Liu,Peng Zhou,Hua Tang,Junhua Li
Photocatalytic amine oxidation coupled with hydrogen evolution offers a sustainable route to green hydrogen and value-added chemicals, yet efficient N–H bond activation remains challenging. Herein, we construct atomic Ag–N frustrated Lewis pairs (FLPs) composed of low-valence Ag single atoms as Lewis acids and adjacent electron-rich N atoms as Lewis bases by anchoring high-density Ag single atoms onto N-deficient g-C 3 N 4 nanosheets to form an Ag–N 1 C 2 structure. These atomic Ag–N FLP sites enable efficient adsorption and selective N–H bond cleavage through synergistic coordination of Ag with the amine N atom and neighboring N sites with H. Meanwhile, Ag single atoms serve as effective hole-transfer bridges, enhancing surface hole accumulation and accelerating oxidation kinetics. The resulting photocatalyst exhibits a benzylamine oxidation rate of 0.85 mmol g cat −1 h −1 , converts benzylamine to N -benzylidenebenzylamine with >99% selectivity, and achieves a hydrogen evolution rate of 1.86 mmol g cat −1 h −1 .
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