Plasmonics
·
2025
·
IF 4.3
Chen Kun,Ma Chaoqun,Chen Guoqing,Yang Taiqun,Gao Hui,Li Lei,Hu Anqi,Cao Jun,Zheng Chenkai,Ma Longyao,Chen Zehao
The detection of pefloxacin (PEF) in milk is of significant importance for food safety. Traditional methods for detecting PEF often rely on techniques such as high-performance liquid chromatography (HPLC), which are complex and time-consuming. This article introduces a surface-enhanced Raman scattering (SERS) substrate based on a composite of covalent organic frameworks (COFs) and silver nanoparticles (AgNPs) for the rapid detection of PEF in milk. After testing PEF in both water and milk, the detection limits were calculated to be 6.31 μg/L for water and 82 μg/L for milk, with correlation coefficients of 0.991 and 0.998, respectively. Furthermore, the average recovery rate of PEF in milk ranged from 96.25% to 106.17%, with a relative standard deviation (RSD) of 4.32% to 8.88%. This work offers a simple and rapid method for detecting PEF in milk. Graphical
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Lijun Yang,Jiankun Liu,Yuxi Wang,Huanwen Zhou,Xiaoyuan Liao
In industry, silver-based catalysts are the mainstream choice for converting ethylene to ethylene oxide (EO), and the morphology of Ag particles plays an important role in their catalytic performance; however, related studies are scarce. In this work, evidence from SEM shown that we successfully synthesized three different morphologies of Ag particles induced by different solvent, i.e., flower-like Ag (Fl-Ag), spheroidal Ag (Sp-Ag) and sheet-like Ag (Sh-Ag), dissolve them respectively into the mixed solution of silver nitrate/oxalic acid to form a suspension, then load onto α-Al 2 O 3 . Through were calculated from the XRD peak area the Ag(100) surface occupancy has the order of Fl-Ag (30 %) > Sh-Ag (20 %) > Sp-Ag (15 %), and the selectivity of EO has positive relation with similar order of Fl-Ag/Al 2 O 3 (85 %) > Sh-Ag/ Al 2 O 3 (72 %) > Sp-Ag/Al 2 O 3 (70 %). The selectivity of Fl-Ag/Al 2 O 3 for EO at 210 °C was 85 %. It is shown that Ag(100) surface has better O 2 interaction and activated than that of Ag(111) surface, and (100) has a lower activation energy than the side reaction (0.9 eV vs 1.0 eV), facilitates the conversion of ethylene to ethylene oxide. This study provides a new method to design and optimize silver catalysts.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yun Wang,Heng Li,Jinming Li,Wei Zhang,Chengwei Wu
Repairing and regenerating articular cartilage remains a significant challenge, primarily due to its limited self-healing capability. Hydrogel has emerged as a promising candidate due to its resemblance to extracellular matrices. A porous hydrogel of an appropriate size can facilitate cell growth and integrate into the host tissue. However, the presence of pores in hydrogels will significantly reduce mechanical properties, posing challenges in replacing the load-bearing function of articular cartilage. Here, a porous hydrogel was prepared through a gas forming method based on a triple-network hydrogel system of poly(vinyl alcohol) (PVA)-polyacrylamide (PAM)-agarose (AG), with a pore size of 100–200 μm. The hydrogel exhibits a compressive modulus of up to 0.79 MPa and a tensile modulus of up to 0.35 MPa, falling within the reference range of articular cartilage. Furthermore, the porous hydrogel exhibits good creep resistance properties. These results suggest that the porous hydrogels with strong mechanical properties hold promise as a replacement material for articular cartilage.
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Surfaces and Interfaces
·
2024
·
IF 5.7
Zhihua Zhao,Yao Wang,Wei Chen,Guixin Jin,Qingsheng Shi,Baocang Zhou,Yafang Pan,Lan Wu,Zhigang Shao
Ammonia (NH 3 ) is one of the most detrimental environmental pollutants emanating from various industrial processes. Therefore, the preparation of ammonia sensors with excellent performance holds the utmost significance, ensuring environmental quality and human health. In this study, through the self-redox reaction between Ti 3 C 2 T x and Ag + , Ag nanoparticles (NPs) loaded Ti 3 C 2 T x MXene (Ag@MXene) were directly prepared. The as-synthesized materials were conducted a comprehensive investigation into their gas-sensing properties and were characterized utilizing analytical techniques such as XRD (X-ray Diffraction), XPS (X-ray Photoelectron Spectroscopy), SEM (Scanning Electron Microscope), and EDS (Energy-Dispersive X-ray Spectroscopy). According to the experimental findings, the Ag@MXene sensor responds to NH 3 remarkably well at room temperature, about 7 times more effectively than pure MXene performs under the same condition. Density functional theory (DFT) investigations were additionally carried out to further clarify the gas-sensing mechanisms. The technique for creating high-precision and room-temperature gas sensors is described in this paper as a workable strategy.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Na Liu,Renzhe Li,Shijian Xiu,Jingyang Jin,Miao Piao,Yeru Bao,So Hee Kim,Zhengri Yin,Aihua Jin,Bo Quan
Non–enzymatic glucose sensors have gained significant attention as promising alternatives to address the limitations associated with enzyme–based sensors. Numerous non–enzymatic glucose sensors have demonstrated effective, non–invasive blood glucose monitoring through the analysis of human body fluids such as urine, saliva, and sweat. In this study, Cu 2 O/Ag nanowires (NWs) nanocomposites were in situ fabricated as electrode materials for non–enzymatic glucose sensors. To enhance the electrocatalytic performance, Cu 2 O/Ag NWs nanocomposites with a distinctive pepero–shaped morphology were synthesized using varied copper precursor ratios, facilitating a systematic investigation of Cu 2 O content on glucose detection. The results reveal that the CA–2 electrode material exhibits outstanding electrocatalytic performance for glucose detection, with sensitivity ranges of 10–100 nM and 1 μM–1 mM, achieving sensitivities of 22,099 and 1474 μA mM −1 cm −2 , respectively, and a detection limit of 3.29 nM. Additionally, this material has shown high efficiency in detecting glucose in urine, highlighting its excellent detection capabilities.
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Materials
·
2025
·Vol. 18
·期 17
·4130
·
IF 3.2
Chenyang Zhao,Xiaochen Ren
In this study, we successfully prepared silver electrodes through a silver mirror reaction. By carefully regulating the amount of ammonia complexing agent in the silver–ammonia solution, we effectively suppressed the decomposition of the plating solution while reducing the surface roughness of silver films from 9.22 nm to 4.42 nm. The electrical conductivity of our solution-processed silver layers was nearly one order of magnitude higher than that of conventional inkjet-printed silver electrodes. When applied as source-drain electrodes in organic field-effect transistors (OFETs), these electrodes enabled devices with an average mobility of 0.13 cm 2 /(V·s) and remarkably low mobility variation of only 8.7%. Furthermore, we modified the silver electrodes through chemical platinum plating, achieving a significant 0.74 eV alteration in work function, which demonstrates the great potential of chemical plating for surface functionalization in solution-processed organic electronic devices.
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PubMed
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Nano Energy
·
2024
·
IF 16.8
Wenjie Deng,Long Yuan,Peng Wan,Junlu Sun,Caixia Kan,Daning Shi,Chunxiang Xu,Junfeng Lu
In the complex human body fluids, neurotransmitters such as dopamine (DA) play a significant role in regulating physiological functions, thereby impacting the normal functioning of biological activities. Hence, employing a rapid and non-destructive analytical technique for precise measurement of these molecules is crucial. Here, a novel piezoelectric-enhanced ZnO/Ag microcavity SERS substrate was designed, enabling ultra-sensitive and instantaneous detection of DA molecules. This substrate achieves exceptional trace detection performance, with a detection limit for Rhodamine 6 G (R6G) molecules as low as 5×10 −13 M and a EF of 1.05×10 11 , DA can be accurately identified even at exceedingly low concentrations, demonstrating outstanding capabilities in trace detection. This innovative structure not only represents a breakthrough in the rapid trace detection of neurotransmitters but also introduces new avenues for research and diagnostics in fields such as precision medicine, neuroscience , and pharmaceutical development.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2014
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IF 3.552
Zhihai Cao,Shudi Zhu,Hui Qu,Dongming Qi,Ulrich Ziener,Liu Yang,Yingjie Yan,Haitang Yang
Ag/TiO 2 nanocomposites were prepared through combination of a sol–gel process of a titanium precursor in inverse miniemulsions and in situ reduction of silver ions in the “nanoreactors”. The morphological investigation shows that Ag nanoparticles are mainly located on the surface of TiO 2 nano-supports because of the fast reduction rate of Ag ions by hydrazine. Ag/TiO 2 nanocomposites with amorphous or anatase TiO 2 phase displayed high visible-light catalytic activity for degradation of Rhodamine B. The photoactivity of Ag/anatase TiO 2 nanocomposites could be influenced by the Ag content that could be conveniently tuned by the loading of silver salts. The influence of the loading of silver salts on the particle properties of the Ag/TiO 2 nanocomposites was investigated systematically.
研究领域:
材料科学
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环境科学
·
化学工程
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Boyang Xu,Xuefei Zhou,Yifan Zhang,Yalei Zhang,Qipeng Zhao,Tai-Shung Chung
Photocatalytic membranes have emerged as promising catalytic oxidation materials to mitigate fouling with self-cleaning capacity, yet their visible-light activity and charge recombination remain challenging. In this work, hydrophilic Ag/Ag 3 PO 4 -PDA-n@PES ultrafiltration (UF) membranes were fabricated via polydopamine-assisted surface modification of polyethersulfone (PES) substrates followed by in-situ mineralization of Ag/Ag 3 PO 4 nanoparticles. The membranes were systematically characterized, and the optimized Ag/Ag 3 PO 4 -PDA-5@PES exhibited a water flux of 125 L m −2 h −1 (LMH) and 89.0 % bovine serum albumin (BSA) rejection, outperforming the pristine PES (98 LMH, 66 %). Under visible light, the membrane achieved 87–89 % degradation of organic dyes with a kinetic constant of 0.0254 min −1 for Rhodamine B (RhB), retaining >80 % efficiency after five cycles. In cyclic filtration with RhB, only a 13 % flux decline occurred after three backwashing/self-cleaning cycles, with a flux recovery of 98 %, confirming its strong antifouling and self-cleaning capacity. Moreover, a continuous operation with synthetic urine wastewater achieved 80–95 % chemical oxygen demand (COD) and 90–95 % chroma removal, demonstrating the membrane's practical potential in wastewater treatment.
研究领域:
环境科学
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材料科学
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化学工程
·
光催化
·
水处理技术
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Hanwen Xin,Xinru Wang,Xing Wang,Xinke Li,Xujie Yang,Jinghui Zhou,Dayin Sun
Current antimicrobial agents face challenges in recyclability and solvent compatibility. To overcome these limitations, we engineered core–shell Fe3O4@SiO2@Lignin@Ag nanoparticles (FLA) and assembled them into magnetically responsive colloidosomes via emulsion templating. Structural analyses confirmed a controlled size evolution from the magnetic core to the composite colloidosomes. The colloidosomes achieved complete elimination of pathogenic bacteria (Escherichia coli and Staphylococcus aureus) within 24 h─exhibiting 5-fold higher efficiency than nonassembled nanoparticles─while maintaining structural integrity across polar and nonpolar solvents. Crucially, the system demonstrated high biocompatibility (>80% cell viability in mammalian cells), establishing a green platform for recyclable antimicrobial coatings in diverse industrial applications.
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CRYSTAL GROWTH & DESIGN
·
2025
·
IF 3.4
Bo Shen,Zhengqiu Chen,Junyu Chen,Ning Wang,Huaming Mao,Jungang Yin,Yu Ren,Wei Dai,Shuanglong Zhao,Hongwei Yang
The high dependence of the photovoltaic industry on the precious metal Ag has exacerbated its resource shortage and cost pressure, and there is an urgent need to develop low-cost, Cu-based alternative materials. In this study, the construction of a Cu@Ag core–shell structure is realized through the interface regulation strategy driven by glutamic acid (Glu) coordination, which effectively synergizes the high electrical conductivity of Cu and the antioxidant advantages of Ag. Combined with molecular dynamics simulation and electrochemical analysis, the three-stage process of adsorption–displacement–reduction of Ag layer growth is revealed. On the basis of this, according to the differences in the surface interface properties of different dimensional Cu-based materials, the “high-activity edge-selective passivation” (2D) and “dual-complexant gradient adjustment” (3D) strategies are adopted to optimize the coating path of the silver layer, so as to realize the multidimensional Cu@Ag core–shell structures. Finally, material performance characterization shows that the multidimensional Cu@Ag core–shell structure can significantly inhibit the oxidation of Cu nuclei. This study provides a new solution for the design of low-cost and high-performance materials in the fields of photovoltaic conductive pastes and flexible electronics as well as a new idea for interfacial engineering and large-scale preparation of multidimensional heterostructures.
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ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Jiahe Huang,Hongyan Zhang,Xiaofeng Zhao,Ju Bai,Yanjun Hou,Shuhong Wang,Cheng Wang,Dongge Ma
Organic electric memory devices have broad application prospects. In the present paper, a new kind of polyfluorene-based material containing methoxytriphenylamine groups was synthesized, which exhibited good Flash-type storage characteristics. The material was further doped with Ag NPs to improve storage performance. With appropriate amount of Ag NPs, the device presented an ON/OFF current ratio up to 1.1 × 10 4 with excellent stability. In addition, the switching characteristics of the device were discussed through data fitting and molecular orbital calculation.
研究领域:
材料科学
·
电子工程
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