Advanced Science
·
2024
·
IF 14.3
Wei Shi,Hui Li,Jing Chen,Yern Chee Ching,Cheng Hock Chuah,Chengsheng Xu,Moran Liu,Jinyong Zhang,Kuan Yong Ching,Yongsheng Liang,Guanglin Li,Wei Tang
Hydrogels present attractive opportunities as flexible sensors due to their soft nature and tunable physicochemical properties. Despite significant advances, practical application of hydrogel-based sensor is limited by the lack of general routes to fabricate materials with combination of mechanical, conductive, and biological properties. Here, a multi-functional hydrogel sensor is reported by in situ polymerizing of acrylamide (AM) with N,N′-bis(acryloyl)cystamine (BA) dynamic crosslinked silver-modified polydopamine (PDA) nanoparticles, namely PAM/BA-Ag@PDA. Compared with traditional polyacrylamide (PAM) hydrogel, the BA-Ag@PDA nanoparticles provide both high-functionality crosslinks and multiple interactions within PAM networks, thereby endowing the optimized PAM/BA-Ag@PDA hydrogel with significantly enhanced tensile/compressive strength (349.80 kPa at 383.57% tensile strain, 263.08 kPa at 90% compressive strain), lower hysteresis (5.2%), improved conductivity (2.51 S m −1 ) and excellent near-infrared (NIR) light-triggered self-healing ability. As a strain sensor, the PAM/BA-Ag@PDA hydrogel shows a good sensitivity (gauge factor of 1.86), rapid response time (138 ms), and high stability. Owing to abundant reactive groups in PDA, the PAM/BA-Ag@PDA hydrogel exhibits inherent tissue adhesiveness and antioxidant, along with a synergistic antibacterial effect by PDA and Ag. Toward practical applications, the PAM/BA-Ag@PDA hydrogel can conformally adhere to skin and monitor subtle activities and large-scale movements with excellent reliability, demonstrating its promising applications as wearable sensors for healthcare.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 22
·8803-8811
·
IF 8.262
Tao Fu,Jun Fang,Chunsheng Wang,Jinbao Zhao
Aiming to reduce the dosage of the noble metal Pt and improve the catalytic activity of the catalyst in fuel cells, hollow porous Ag–Pt alloy nanoparticles with Pt coating are prepared via a facile controlled galvanic replacement reaction. Ag is used as the substrate to build a hollow porous structure and alloyed with Pt to minimize the tensile effect of the Ag on the deposited Pt skin which would significantly lower the catalytic performance of the Ag–Pt bimetallic catalyst. This hollow porous Ag/Pt bimetallic catalyst exhibits a long catalytic durability and a mass activity of 0.438 A mgPt−1 at 0.9 V (vs. RHE) towards the oxygen reduction reaction (ORR), which is ca. 3 times higher than that of the commercial Pt/C catalyst. The significant enhancement over the state-of-the-art Pt catalysts can be attributed to (1) the high surface area of the nanoparticles, (2) the more suitable d-band center of the Pt skin deposited on the Ag–Pt alloy substrate, and (3) the high thermal stability of the Ag–Pt alloy. Therefore, this work provides a new strategy for designing high-performance catalysts with low cost. In addition, the synthetic chemistry involved can possibly be extended for fabricating versatile catalysts with a similar structure.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Wenwu Zhang,Yanhong Zhou,Yiping Ding,Linlin Song,Qunhui Yuan,Weiwei Zhao,Chengyan Xu,Jun Wei,Mingyu Li,Hongjun Ji
Metallic conductive nanoink with the sensitivity of temperature, oxygen, and electrochemical migration is a great challenge for printed electronics. Here, the size-controllable Cu@Ag core–shell nanoparticles (NPs) conductive films with effective cost, excellent electrical conductivity, high electrochemical migration (ECM) and oxidation resistance were obtained successfully. The novel mechanism of lower temperature sintering for Cu@Ag NPs was proposed due to radius of curvature between a large amount of tiny Ag nanobumps generated by ‘dewetting’ behavior. The Cu@Ag NPs also exhibited extreme ECM and oxidation resistance. It could remain steady in air for 40 days and hardly oxide at a high temperature of 156℃, and its failure time of ECM was 4.6 times higher than that of Ag NPs. Besides, the resistivity was up to 3.21 μΩ∙cm (55% of the bulk conductivity of Cu) even sintered at 140 °C, which enjoyed a great advantage. Ultimately, serial flexible organic light emitting diodes were integrated by high precision inkjet printing, and their excellent bending resistance and printable performance were fully exhibited. Accordingly, integrating the advantages of controllable nanoscale, lower temperature sintering, optimized conductivity, high antioxidation, excellent ECM resistance, flexibility, and printability, we enlighten the practical applications of flexible printed electronics.
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Jiayong Zhang,Xiangqian Shen,Jun Xing,Shuguo Yu,Mengge Li,Ding Ma,Yuting Sun,Rong Wu,Bin Yao
Air-processed kesterite solar cells show excellent prospects for commercial application because they are suitable for large-scale production. This study shows how the power conversion efficiency (PCE) of (Cu, Ag) 2 ZnSn(S, Se) 4 solar cells can be improved by adjusting the annealing time during the selenization process at a low temperature of 70 °C. Enhancement of PCE is achieved when the annealing time is 240 s. The primary determinant of enhanced PCE is a reduction in reverse saturation current density (J 0 ) and ideality factor (A). Examination of depth characterization indicated that the decrease in J 0 and A can be ascribed to the inhibition of [2Cu Zn + Sn Zn ] defects cluster, which is mainly accountable for the band tail states, and the suppression of interface recombination .
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高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Yunxiang Zhang,Zhichao Mu,Chenliang Zhou,Hazem Abdelsalam,Xingmeng Zhou,Lin Shi,Zhili Chen,Yiran Liang,Zhongjie Wang,Qinfang Zhang
Bi-based Sillén–Aurivillius oxyhalides have attracted extensive attention from researchers owning to their wide range of light absorption, appropriate band structure, and excellent stability; however, their practical application is still limited by their rapid charge recombination. Herein, silver (Ag)-cluster-decorated novel Sillén–Aurivillius oxyhalides (bismuth iron titanium oxyhalide (Bi7Fe2Ti2O17Cl)) with abundant oxygen vacancies (OVs), were successfully synthesized to achieve efficient light absorption and interfacial charge separation. The optimal Ag/Bi7Fe2Ti2O17Cl composites showed excellent tetracycline hydrochloride (TCH) degradation and CO2 reduction efficiencies. The theoretical and experimental results demonstrate that the superior activity is primarily due to the increased magnetic moment of Bi7Fe2Ti2O17Cl induced by the interactions between Ag and O atoms, which strengthens the built-in electric field at the Schottky junction interface and promotes the transfer of photogenerated electrons from Ag clusters to oxyhalides, thus enhancing the generation of charge carriers in the semiconductor and inhibiting bulk recombination. Simultaneously, the synergistic effects of the thermodynamics and kinetics of photocatalytic CO2 reaction along with a lower Gibbs free energy are also responsible for the outstanding CO generation process. This work emphasizes the promising role of metal clusters as co-catalysts in the field of photocatalysis.
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jundong Zhu,Fan Yang,Chongwen Jiang,Zhonghua Li,Yanfang Zhou,Xin Li
Frequent oil spills and the discharge of oily wastewater pose serious threats to the environment, ecosystems, and humans. Herein, a multifunctional superhydrophobic sponge was successfully prepared through the in situ growth of Ag-MnO2 nanoparticles assisted by polydopamine rapid deposition and subsequent hydrophobic silicon modification. Owing to the synergistic effects of the hierarchical micro/nanostructure and methyl-terminated surface modification, the obtained superhydrophobic sponge has a water contact angle (WCA) of 156.5°, demonstrating excellent chemical stability and structural durability under harsh environmental media and mechanical damage. For oil–water separation, the adsorption capacity of modified sponge for various oils ranges from 58.2 to 132.6 times its own weight and great separation efficiency up to 98.38%. Through the photothermal conversion effect of Ag-MnO2 nanocomposite, the surface temperature of the material can reach 64.1 °C under simulated radiation, achieving rapid adsorption and recovery of high-viscosity oil. Additionally, the immobilization of silver nanoparticles within the sponge skeleton effectively inhibits the growth of Escherichia coli and Staphylococcus aureus, exhibiting antibacterial properties that facilitate the elimination of bacteria in organically contaminated water sources. Therefore, the multifunctional superhydrophobic sponge in this study provides high potential and efficient application for efficient oil–water separation, rapid crude oil recovery, and antibacterial pollution of water.
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Sun Yihan,Liu Mingming,Zhiguang Guo
Herein, a catalytic mesh with unique wettability, high oil-water separation efficiency and excellent catalytic performance towards aromatic dyes was fabricated. Polypyrrole (PPy) was firstly pre-coated on pristine stainless-steel mesh (SSM) surface via cyclic voltammetry approach. Subsequently, a simple electrodeposition process was performed to prepare and anchor Ag nanoparticles (AgNPs) onto the PPy-coated SSM surface. The PPy-coated mesh with anchored AgNPs was denoted as PPy/AgNPs-coated SSM. The obtained PPy/AgNPs-coated SSM exhibited dual superlyophobic properties and were able to achieve on-demand separation to deal with various of light oil (ρ oil < ρ water ) and heavy oil (ρ oil > ρ water )-water mixtures. Importantly, benefitting from AgNPs on mesh surface, the obtained PPy/AgNPs-coated SSM exhibits exceptional catalytic activity. As proof-of-concept three typical aromatic dye molecules (methylene blue, rhodamine B and Congo red) can be effectivity degraded. Additionally, the degradation of aromatic dyes and oil-water separation were achieved simultaneously when the PPy/AgNPs-coated SSM was converted to water-removing mode. Therefore, the present work is of great significance to the development of novel oil-water filtration membranes and can open a new avenue towards the practicability of metal nanoparticle catalysts in wastewater treatment.
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 23
·11296-11302
·
IF 3.925
Qinqin Chen,Huiling Liu,Na Niu,Wei Feng,Juan Hou
In this work, a new “off–on” fluorescence strategy for the determination of Ag+ and S2O32− is presented. Nitrogen-doped carbon dots (N-CDs) were synthesized using oxalic acid dihydrate and anhydrous ethylenediamine via a one-pot hydrothermal treatment without further chemical modification. The surface structure and optical properties of the synthesized N-CDs were characterized. The N-CDs emitted bright blue fluorescence with a high quantum yield of 26.01%. Ag+ could selectively quench the fluorescence of N-CDs due to the formation of a N-CDs-Ag+ complex on the surface. The quenching effect demonstrated a linear relationship in the range of 0–14 and 14–80 μM with a low detection limit (LOD) of 150 nM. Furthermore, S2O32− could combine with Ag+ to generate a more stable Ag+–S2O32− complex, and thus the fluorescence of the N-CDs-Ag+ system could be restored by adding S2O32−. The N-CDs-Ag+ solution behaved as a secondary fluorescent probe to detect S2O32− in the range of 0–50 nM with an extremely low LOD of 1.5 nM. The N-CDs were successfully applied to analyze Ag+ and S2O32− in real samples with satisfactory recoveries (99.04–103.20% and 97.11–99.84%, respectively), implying good applicability in practical analysis.
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高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Zi-Yao Chen,Wen-Zhu Shao,Wei-Jian Li,Xue-Yin Sun,Liang Zhen,Yang Li
Due to the strong surface energy and polarity, ZnO nanoparticles are prone to adsorbing the OH groups dissociated from water in the air, leading to easy agglomeration and hence deteriorating the dispersion of ZnO in composites. In this work, it has been theoretically and experimentally demonstrated that doping with lower electronegativity metallic ions is an effective strategy to suppress the agglomeration of ZnO nanoparticles. By calculating the adsorption energies and electronic structures of OH/M-doped ZnO configurations (M = Li+, Cu2+, Al3+), it was found that metallic ion doping with a lower electronegativity (in comparison to that of the host Zn2+) can efficiently reduce the adsorption of OH groups on the ZnO surface due to the lower effective bond order of M–O bonds. Guided by the theoretical results, various M-doped ZnO nanoparticles (M = Li+, Cu2+, Al3+) were prepared and characterized by X-ray photoelectron spectroscopy and a laser particle sizer, which confirmed that the lower the electronegativity of dopants, the lower the OH groups’ adsorbed amounts and aggregate sizes of M-doped ZnO nanoparticles. This work provides a general avenue to design the composition of M-doped ZnO nanoparticles for suppressing agglomeration and enhance the dispersion of ZnO in composites.
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高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Zhihui Li,Mengke Ma,Chaojin Yang,Yifan Deng,Min Guo,Zhaohui Jiang,Haofei Huang
Hierarchical PPy/GO/Ag coatings boost broadband photothermal conversion. • Controlled LbL self-assembly of PPy, 2D GO and 0D Ag NPs is achieved. • Multilayer interfaces enable solar evaporation and thermoelectric/thermotherapy. Solar energy as abundant, carbon-neutral and globally accessible energy, has garnered considerable research attention in sustainable photothermal conversion technologies. To overcome the intrinsic limitations of narrow spectral absorption and incomplete photon utilization in single-component photothermal systems, this work engineered the hierarchical polypyrrole/graphene oxide/silver nanoparticles (PPy/GO/Ag) composite coatings with multilayer interfaces on fabrics through convenient and universal layer-by-layer (LbL) self-assembly strategy. This rational design yielded hierarchical PPy/GO/Ag composite coated fabrics with 93.3% broadband absorption across the solar spectrum (300–2500 nm). Under 1 kW·m⁻ 2 (1 sun) solar irradiation, the optimized PPy(GO/Ag)-3 composite coatings achieved a steady-state surface temperature of 73.1 °C within 300 s. When integrated with a commercial thermoelectric module, the composite coatings as flexible photo-thermoelectric generator leveraging the Seebeck effect, delivered a stable open-circuit voltage of 39.7 mV and short-circuit current of 9.4 mA, corresponding to a power density of 233.2 mW·m⁻ 2 . In solar-driven interfacial evaporation, the composite coatings achieved high water evaporation rate of 2.01 kg·m⁻ 2 ·h⁻ 1 with photothermal conversion efficiency of 92.1% under 1 sun irradiation. For personal thermotherapy, the composite coated fabric maintained a safe and therapeutically effective surface temperature on human body under both simulated sunlight and natural daylight. Thus, this work provided a versatile photothermal platform for next-generation solar-harvesting systems targeting multi-scenario applications. Download: Download high-res image (322KB) Download: Download full-size image
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Fei Liu,Thien-Phap Nguyen,Qin Wang,Florian Massuyeau,Yi Dan,Long Jiang
Constructing a conductive interface is crucial for the transfer of photoexcited charges in the photocatalytic heterojunction system. In this study, we introduced Ag into g-C 3 N 4 /P3HT system to construct a conductive interface which benefits for transfer of photoexcited charges between g-C 3 N 4 and P3HT. A series of characterizations were employed to investigate the chemical structure , morphology and optical property of the obtained catalysts. And the photocatalytic activity of the as-prepared g-C 3 N 4 /Ag/P3HT composites were evaluated by the degradation of tetracycline (TC) and methyl orange (MO) aqueous solution under visible light irradiation. Results show that the g-C 3 N 4 /Ag/P3HT exhibits a broad absorption band in the region of 400–700 nm and the photocatalytic activity of g-C 3 N 4 /Ag/P3HT obtains a great improvement comparing with that of g-C 3 N 4 , g-C 3 N 4 /Ag and g-C 3 N 4 /P3HT. In addition, the optimized loading content of P3HT is 0.3 mass% based on g-C 3 N 4 . The enhanced photocatalytic performance is due to the introduction of Ag, which improves the transfer of photoexcited charges between g-C 3 N 4 and P3HT. The active species trapping experiment shows that the main active specie is O 2− . After five recycling experiments, the g-C 3 N 4 /Ag/P3HT shows high stability in the photocatalytic performance.
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高影响因子
MARINE POLLUTION BULLETIN
·
2025
·
IF 4.9
Tianshuo Lan,Yiping Du,Meichun Liu,Xinna Yu,Danyang Wang,Haotian Huang,Tianyuan Liu,Meizhen Huang
As a global environmental concern, real-time detection of marine nanoplastics (NPs) has gained increasing attention. However, current detection methods are still confronted with the challenge of detecting low concentration NPs in marine solution conditions, and it is imperative to establish a rapid detection method for directly detecting NPs in marine solution. In this study, a silver coated gold nanoparticle (Au@Ag) based real-time SERS detection strategies is proposed, with a particular focus of the enhancement mechanism of the particle diameter for SERS performance. Compared with common SERS enhancing particles, Au@Ag demonstrates remarkable SERS enhancement capability. For mechanism investigation, particle diameter is a critical factor significantly influenced the signal intensity of testing specimen. Among all diameter combinations, SERS performance reaches the maximum level when the particle diameter of Au@Ag is slightly smaller than polystyrene nanoparticles (PS NPs). Under these conditions, the lowest detection concentration of PS NPs in purified water without any extra pretreatments was determined to be approximately 0.1 μg/mL. By employing the same PS NPs and Au@Ag in artificial seawater solution, the lowest detection concentration of PS NPs reaches to 0.01 μg/mL. These results indicate that the efficacy of Au@Ag for real-time SERS detection of PS NPs in marine solution, and provide a valuable reference for future study of material selection and particle size optimization for NPs in-situ SERS detection for real marine condition.
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高影响因子
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