JOURNAL OF SOLID STATE CHEMISTRY
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2019
·
IF 2.291
Kai-Sheng Yao,Hai-Li Zhao,Nan Wang,Tian-Jin Li,Shuang Zhao,Wei-Wei Lu
The ultra-large, single-crystal Ag nanosheets and their assembled films can be easily one-pot prepared at room temperature via a chloroform-water interfacial reaction route with o -ethoxyaniline (OEA) in chloroform as reductant and AgNO 3 in water as precursor. The as-obtained single-crystal Ag nanosheets can reach as large as 16 μm in side length and as thin as 22 nm in thickness. The results show that reagent concentrations, temperature and organic phase in current liquid-liquid reaction have significant influences on the formation of Ag sheet-like nanostructures . The possible mechanism was proposed for the growth and formation of Ag nanosheets and their assembled films. Furthermore, using p -aminothiophenol (PATP) as a model molecular probe , the Ag nanosheet-assembled films exhibit outstanding surface-enhanced Raman scattering (SERS) response and high reproducibility.
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高影响因子
Journal of Materiomics
·
2015
·
IF 0
Junwei Fu,Shaowen Cao,Jiaguo Yu
Photocatalytic hydrogen generation is one of the most promising solutions to convert solar power into green chemical energy. In this work, a multi-component TiO 2 –Ag–Cu 2 O composite was obtained through simple impregnation-calcination of Cu 2 O and subsequent photodeposition of Ag onto electrospun TiO 2 nanotubes. The resulting TiO 2 –Ag–Cu 2 O photocatalyst exhibits excellent photocatalytic H 2 evolution activity due to the synergetic effect of Ag and Cu 2 O on electrospun TiO 2 nanotubes. A dual Z-scheme charge transfer pathway for photocatalytic reactions over TiO 2 –Ag–Cu 2 O composite was proposed and discussed. This work provides a prototype for designing Z-scheme photocatalyst with Ag as an electron mediator.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Chengyu Yang,Ying Yang,Chengxin Zhang,Hui Yu,Tingting Wang,Keying Shi,Zhuanfang Zhang,Dongjie Wang,Xiangting Dong
In this paper, a simple method to synthesize Ag-doped Fe 2 O 3 hollow nanofibers by electrospinning was reported. The synthesized samples were fabricated into gas sensors, and their sensing properties were studied systematically. The results showed that the Ag-doped Fe 2 O 3 materials were hollow tubular structures and had high response (R a /R g = 19.43), selectivity and sensitivity to H 2 S at room temperature. The response mechanism of the sensor to H 2 S was studied by DFT, O 2 -TPD and H 2 -TPR. It was considered that the excellent gas sensing performance of the sensor was that the Ag-dopant increased the concentration of carriers, adsorbed oxygen and lattice oxygen. The rough hollow structure was conducive to gas adsorption and capture, which provided many active centers for the sensing reaction. Therefore, the Ag-doped Fe 2 O 3 nanofibers with hollow structure will have promising uses as sensing material in future applications.
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高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Wei Lan,Youxin Chen,Zhiwei Yang,Weihua Han,Jinyuan Zhou,Yue Zhang,Junya Wang,Guomei Tang,Yupeng Wei,Wei Dou,Qing Su,Erqing Xie
Ultraflexible transparent film heaters have been fabricated by embedding conductive silver (Ag) nanowires into a thin poly(vinyl alcohol) film (AgNW/PVA). A cold-pressing method was used to rationally adjust the sheet resistance of the composite films and thus the heating powers of the AgNW/PVA film heaters at certain biases. The film heaters have a favorable optical transmittance (93.1% at 26 Ω/sq) and an outstanding mechanical flexibility (no visible change in sheet resistance after 10 000 bending cycles and at a radius of curvature ≤1 mm). The film heaters have an environmental endurance, and there is no significant performance degradation after being kept at high temperature (80 °C) and high humidity (45 °C, 80% humidity) for half a year. The efficient Joule heating can increase the temperature of the film heaters (20 Ω/sq) to 74 °C in ∼20 s at a bias of 5 V. The fast-heating characteristics at low voltages (a few volts) associated with its transparent and flexibility properties make the poly(dimethylsiloxane)/AgNW/PVA composite film a potential candidate in medical thermotherapy pads.
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高影响因子
Royal Society Open Science
·
2019
·Vol. 6
·期 9
·
IF 2.515
Shang Wang,Zhaolian Han,Tingting Di,Rui Li,Siyuan Liu,Zhiqiang Cheng
The pod-shaped TiO2 nano burst tubes (TiO2 NBTs) were prepared by the combination of electrospinning and impregnation calcination with oxalic acid (H2C2O4), polystyrene (PS) and tetrabutyl titanate. The silver nanoparticles (AgNPs) were loaded onto the surface of TiO2 NBTs by ultraviolet light reduction method to prepare pod-shaped Ag@TiO2 NBTs. In this work, we analysed the effect of the amount of oxalic acid on the cracking degree of TiO2 NBTs; the effect of the concentration of AgNO3 solution on the particle size and loading of AgNPs on the surface of TiO2 NBTs. Scanning electron microscopy and transmission electron microscopy investigated the surface morphology of samples. X-ray diffraction and X-ray photoelectron spectroscopy characterized the structure and composition of samples. Rhodamine B (RhB) solution was used to evaluate the photocatalytic activity of pod-shaped TiO2 NBTs and Ag@TiO2 NBTs. The results showed that TiO2 NBTs degraded 91.0% of RhB under ultraviolet light, Ag@TiO2 NBTs degraded 95.5% under visible light for 75 and 60 min, respectively. The degradation process of both samples was consistent with the Langmuir–Hinshelwood first-order kinetic equation. Therefore, the catalytic performance of the sample is: Ag@TiO2 NBTs > TiO2 NBTs > TiO2 nanotubes.
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高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 26
·2200611
·
IF 6.389
Zeliang Guo,Jialiang Lang,Haitian Zhang,Cheng Yang,Sen Lin,Hui Wu
Silver particles are key materials for the production of conductive inks, which are typically thermally sintered to obtain high conductivity. However, it remains a big challenge to achieve high conductivity at temperatures lower than 150 °C, for the protection of heat-sensitive components in printed electronic devices. In this study, a novel frigid synthesis strategy at subzero temperature (Celsius) to produce Ag NPs with rich, rose-like nanostructures (Ag nano-flowers) is developed. The growth mechanism of Ag nano-flowers under frigid conditions is analyzed and discussed. Due to the fine nanoscale structure of Ag nano-flowers, they exhibit low sintering temperature below 120 °C. The electrical conductivity of printed Ag nano-flower foil reaches 8.64 × 10 4 S cm −1 at 120 °C, and 1.20 × 10 5 S cm −1 at 150 °C. This study provides an attractive approach to the facile fabrication of Ag nano-flowers with high electronic conductivity sintered at low temperatures and grants new insights into nanocrystallization under low-temperature conditions.
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高影响因子
APPLIED SURFACE SCIENCE
·
2013
·
IF 2.112
Weibing Li,Fangxia Hua,Jiguang Yue,Jiwei Li
Metal-semiconductor compounds, such as Ag@AgX (X = Cl, Br, I), enable visible light absorption and separation of photogenerated electron–hole through surface plasmon resonance (SPR) effect. However, the electron–hole generated and separated by light are vulnerable in Ag@AgX phase because of the occurrence of secondary recombined. In order to more effectively utilize the SPR photocatalytic effect, a heterojunction interface electric field was implemented effectively by introducing some cost-effective semiconductor materials with wide band gap to Ag@AgX compound, thereby preventing photogenerated electrons from secondarily compounding with the holes. In this article, by mixing 500 nm diameter ZnO and Ag@AgX compounds with mole ratio 1:1, studies show that 15 min illumination under visible light can complete degradation of rhodamine B (RhB), and indicate a high stability of photocatalytic degradation. Through Mott–Schottky plots and photoinduced I – t curve, the results show that through the ZnO/Ag@AgCl composition, heterojunction interface electric field can be formed effectively, thus increasing the separation efficiency and transfer speed of photogenerated electrons and holes, and improving the photocatalytic performance. Meanwhile, Ag@AgCl can implement the photosensitization of ZnO with high efficiency through SPR effect, which will enlarge the response range of photocatalyst to the visible area.
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高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 5
·1-16
·
IF 2.4
Bai Yang,Chen Zhongxiang,Gu Deng,Wang Ren,He Jianing
The Surface Plasmon Resonance (SPR) effect and the construction of Z-scheme heterojunctions are critical for enhancing photocatalytic rates. Herein, a composite material composed of a Z-scheme heterojunction structure, AgInS 2 /g-C 3 N 4 (AIS/GCN), was developed and further optimized through the modification of Ag nanoparticles (Ag NPs). The SPR effect of Ag NPs significantly improved the electron transfer characteristics of GCN, leading to enhanced separation efficiency of electron-hole pairs. By leveraging the advantages of the Z-scheme heterojunction, the composite not only effectively enhanced charge carrier separation but also improved light absorption and increased the density of active catalytic sites. To evaluate the photocatalytic degradation efficiency of Rhodamine B (RhB) and the photoreduction efficiency of Cr (VI) using the Ag/AIS/GCN nanocomposite, a systematic characterization analysis was conducted. The results demonstrated that the degradation rate and photoreduction efficiency of the Ag NPs-modified AIS/GCN Z-scheme heterojunction composite were 5.30 times and 7.22 times higher than those of pure GCN, the TOC removal rate of the sample reached 56.19%. The incorporation of Ag NPs and AIS significantly enhanced light energy utilization efficiency, increased the number of surface-active sites, and improved charge carrier transport rates. This study illustrates that the combination of the SPR effect and Z-scheme heterojunction construction markedly enhances the efficiency and stability of the photocatalyst, indicating the broad potential applications of this composite in dye purification and heavy metal removal. Graphical
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高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2025
·Vol. 36
·期 4
·e70171
·
IF 3.4
Huanhuan Bai,Yuxin Chen,Chengzhi Song,Yanyan Dong,Xu Meng
Superhydrophilic/submerged superoleophobic cotton fabrics with antibacterial properties were obtained by loading SiO 2 nanoparticles and Ag + on the surface of cotton fabrics through SiO 2 –Ag + composite sols, followed by the modification of the cotton fabrics with dopamine methacrylamide (DMA) and [2-(methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide (SBMA). The surface morphology and wettability of the modified fabrics were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric/differential thermal analysis (TG), and contact angle measurement. The underwater contact angle and surface wettability analysis showed that the modified cotton fabric had an underwater oil contact angle of 166.5°. The prepared fabric can be used as an effective medium for the gravity-driven separation of oil/water mixtures. The modified fabrics showed resistance to sparing of vegetable oils or different organic solvents, and the average separation efficiency was better than 93% for all types of oil/water mixtures and up to 97%. In addition, the modified fabrics successfully inhibited the growth of Escherichia coli and Staphylococcus aureus with excellent antimicrobial properties.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2012
·
IF 2.098
Ting-Ting Gan,Yu-Jun Zhang,Nan-Jing Zhao,Xue Xiao,Gao-Fang Yin,Shao-Hui Yu,Huan-Bo Wang,Jing-Bo Duan,Chao-Yi Shi,Wen-Qing Liu
Mercaptopropionic acid (MPA) capped CdTe quantum dots (QDs) with particle size 3 nm have been successfully synthesized in aqueous medium by hydrothermal synthesis method. And the effects of different metal ions on MPA capped CdTe QDs fluorescence were studied using fluorescence spectrometry. The results demonstrated that at the same concentration level, Ag + could strongly quench CdTe QDs fluorescence, and the other metal ions had little effect on CdTe QDs fluorescence except Cu 2+ . On the basis of this fact, a rapid, simple, highly sensitive and selective method based on fluorescence quenching principle for Ag + detection in aqueous solution was proposed. Under optimal conditions, the quenched fluorescence intensity ( F 0 – F ) increased linearly with the concentration of Ag + ranging from 4 × 10 −7 to 32 × 10 −7 mol L −1 . The limit of detection for Ag + was 4.106 × 10 −8 mol L −1 . The obtained plot of F 0 / F versus [Ag + ] was an upward curvature, concave towards the y -axis, rather than a straight line. The modified form of the Stern–Volmer equation was third order in Ag + concentration. According to the modified Stern–Volmer equation, it can be inferred that dynamic quenching and static quenching simultaneously occurred when Ag + interacted with MPA capped CdTe QDs. At the same time other factors might also influence the quenching process. Based on this study, hydrothermal synthesized MPA capped CdTe QDs with particle size 3 nm may be used as a novel fluorescence probe to quantificationally and selectively detect Ag + .
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DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Zhicheng Ding,Chenghao Zhang,Yang Liu,Chun Li,Xiaoqing Si,Zongjing He,Zhiquan Wang,Jian Cao
AlN metallization substrates hold broad application potential in the field of electronic packaging due to their high thermal conductivity and unique electrical insulation properties. The present work reports a method for preparing Ag coatings by directly pressing and sintering micro-Ag particles on the AlN surface in air without additional brazing fillers or pre-treatment. The in-situ formation of the Ag-containing Al 2 O 3 interlayer (~200 nm) is critical for the interfacial bonding at the AlN/Ag interface. The diffusion of Ag particles into Al 2 O 3 not only enhances the interfacial adhesion of the Ag layer but also improves thermal conductivity. Notably, AlN/Ag exhibits a high bonding strength of 67.6 MPa with an excellent thermal conductivity of 178.7 W·m -1 ·K -1 at 950°C. The Ag layer demonstrates superior surface hardness and electrical conductivity at 900°C due to its high density and low grain boundary density.
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高影响因子
Nanoscale
·
2025
·
IF 5.1
Chuwei Zhu,Yuxi Li,Tailei Hou,Xiaole Gu,Xinyuan Li,Le Sang,Jiatao Zhang
Recent advances in microreactor technology have established these systems as promising platforms for colloidal nanocrystal synthesis. Nevertheless, the continuous production of high-quality doped quantum dots (QDs) with precise control over optical properties continues to present significant technical challenges. This study introduces a micropacked bed (MPB) intensified tube microreactor system for the efficient and continuous synthesis of Ag+ doped CdS QDs (CdS:Ag+ doped-QDs). Through systematic optimization of reaction parameters, the MPB system achieved photoluminescent quantum yield (PLQY) of 50.8% under optimized conditions (18 cm MPB filled with 2.0 mm glass beads, 0.2 mL/min flow rate, and 70 °C reaction temperature), and the yield increased to 64.6%. These results represent significant improvements over the traditional batch flask method (40% PLQY, 43.01% yield) and the microreactor method (43% PLQY, 48.41% yield). The developed MPB system demonstrates multiple operational advantages: reaction duration reduced to 30 minutes, simplified fluidic architecture requiring only two pumps (vs. three in conventional systems), and enhancement in flow rate (0.2 mL/min vs. 40 μL/min). Production capacity analysis revealed 6-fold and 2.67-fold increases in CdS:Ag+ doped-QDs output compared to batch flask method and microreactor method, respectively, per unit time. This continuous flow strategy establishes a viable pathway for industrial-scale synthesis of doped quantum dots with enhanced process efficiency and material quality.
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PubMed
高影响因子
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