CERAMICS INTERNATIONAL
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2017
·Vol. 43
·期 9
·7231-7236
·
IF 2.986
Yaoyao Wu,Shangshu Qian,Hua Lan,Lei Yan,Haoxiang Yu,Xing Cheng,Fanmin Ran,Miao Shui,Jie Shu
In this work, silver and carbon co-coated SrLi 2 Ti 6 O 14 is synthesized by using a solid-state assisted solution method, with glucose as carbon source and silver nitrate as Ag source. The structural and morphological properties of as-prepared samples are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), which confirm that C/Ag composite layer is uniformly coated on the surface of SrLi 2 Ti 6 O 14 . Electrochemical measurements like galvanostatic charge/discharge tests, rate performance, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analysis are also undertaken to evaluate and compare the lithium storage capability of SrLi 2 Ti 6 O 14 before and after coating. According to the results, SrLi 2 Ti 6 O 14 @C/Ag presents enhanced electrochemical capability compared with bare material. It can be found that bare SrLi 2 Ti 6 O 14 only delivers the reversible capacity of 140.32 mA h g −1 with capacity retention of 90.7% at 100 mA g −1 after 200 cycles. In contrast, SrLi 2 Ti 6 O 14 @C/Ag presents the reversible capacity of 151.20 mA h g −1 with only 6.7% capacity loss after 200 cycles. The improvement is owing to the increase of electronic conductivity and the decrease in the redox polarization after coating. In order to further investigate the structural stability of SrLi 2 Ti 6 O 14 @C/Ag, in-situ XRD was performed as well. All the results prove that the C/Ag co-coating has positive effect on the electrochemical performance of SrLi 2 Ti 6 O 14 .
研究领域:
材料科学
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电化学
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储能技术
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纳米材料
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Ningyuan Jiang,Yi Feng,Zhuhan Liu,Miao Yu,Gang Qian,Jingcheng Zhang,Zijue Zhou
La 2 Sn 2 O 7 has high melting point and excellent thermal stability, which improves the wettability between matrix and reinforcement. In this study, La 2 Sn 2 O 7 powder was synthesized by chemical coprecipitation method, and Ag-Ni-La 2 Sn 2 O 7 composites were prepared by vacuum hot-pressing sintering. The effect of La 2 Sn 2 O 7 content on the arc erosion behavior of Ag-Ni-La 2 Sn 2 O 7 composites was studied. The Ag-Ni-La 2 Sn 2 O 7 (85:12:3) composite has the lowest arc energy and the highest breakdown strength . With the increase of La 2 Sn 2 O 7 content, the defects on the cathode surface decrease and the erosion areas become flat. After arc erosion, the samples generate Ag 2 O, NiO, La 2 O 3 and SnO 2 . In this study, the mechanism of La 2 Sn 2 O 7 to improve the anti-arc erosion capability of composites is mainly enhancing the viscosity of the molten pool by the ``pinning'' action, consuming energy by the decomposition of La 2 Sn 2 O 7 , and the promotion of arc movement.
研究领域:
材料科学
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电接触材料
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复合材料
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电弧侵蚀
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DOI
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.
研究领域:
材料科学
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纳米技术
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柔性电子学
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生物医学工程
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热疗技术
✓ 已验证
DOI
高影响因子
Nano Research
·
2016
·Vol. 9
·期 6
·1590-1599
·
IF 8.893
Liu Dong,Xie Maolin,Wang Chengming,Liao Lingwen,Qiu Lu,Ma Jun,Huang Hao,Long Ran,Jiang Jun,Xiong Yujie
Formic acid oxidation is an important electrocatalytic reaction in protonexchange membrane (PEM) fuel cells, in which both active sites and species adsorption/activation play key roles. In this study, we have developed hollow Pd-Ag alloy nanostructures with high active surface areas for application to electrocatalytic formic acid oxidation. When a certain amount of Ag is incorporated into a Pd lattice, which is already a highly active material for formic acid oxidation, the electrocatalytic activity can be significantly boosted. As indicated by theoretical simulations, coupling between Pd and Ag induces polarization charges on Pd catalytic sites, which can enhance the adsorption of HCOO* species. As a result, the designed electrocatalysts can achieve reduced Pd usage and enhanced catalytic properties at the same time. This study represents an approach that simultaneously fabricates hollow structures to increase the number of active sites and utilizes interatomic interactions to tune species adsorption/activation towards improved electrocatalytic performance.
研究领域:
材料科学
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电催化
·
纳米技术
·
能量转换
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Yueyue Ma,Yu Zeng,Ruxi Lin,Liping Chen,Mingzhu Shen,Xiaojun Luo,Bing Shao
Letrozole, anastrozole and trimetazidine are all included in the prohibited list of the World Anti-Doping Agency (WADA). At present, there is still a lack of a systematic Surface-Enhanced Raman Spectroscopy (SERS) spectral database for these drugs, and traditional detection methods suffer from limitations such as insufficient sensitivity and cumbersome operation procedures. In this study, a novel COF@Ag composite was utilized as a SERS-enhanced substrate in combination with a portable Raman spectrometer, allowing for accurate identification and effective differentiation of the characteristic peaks of the three prohibited drugs. Moreover, this method exhibited excellent performance in detecting actual milk matrix samples, with the spiked recovery rate ranging from 98.9% to 101.1%, thereby directly meeting the practical demands of on-site rapid screening. This work offers a reliable and convenient strategy for both sports food safety monitoring and pharmaceutical analysis.
✓ 已验证
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2013
·
IF 2.145
Yanling Liu,Feng Song,Jiadong Liu,Jun Zhang,Yin Yu,Hongyan Zhao
The enhanced luminescences of Er 3+ /Yb 3+ co-doped Y 2 Ti 2 O 7 films were demonstrated when silver/gold (Ag/Au) nanoparticles (NPs) were doped in the films. With the precipitation of the Ag nanoprisms, more intense green (525 nm, 546 nm), red (659 nm) upconversion (UC) emission bands and strong enhanced near infrared (NIR) emission were observed and the enhanced factors were up to 16.7, 15.6, 17.7 and 5.6 folds, respectively. The accordance between the local surface plasmon resonance of NPs and the UC emission band significantly increased the luminescence intensity. The efficiencies of the radiative emissions were enhanced also due to the hydroxyl groups primarily absorbed around the NPs.
研究领域:
材料科学
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光子学
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纳米技术
·
光学材料
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
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2014
·
IF 0.987
Mengying Gan,Yongqiang Huang,Yunlei Zhang,Jianming Pan,Weidong Shi,Yongsheng Yan
Ag/halloysite nanotubes/Fe3O4 (Ag/HNTs/Fe3O4) nanocatalyst was synthesized in our work. The structure of the as-prepared composite catalyst was that Fe3O4 nanoparticles with the size of 5.0–8.0 nm were loaded in the internal hollow lumen of HNTs and Ag nanoparticles with a mean diameter of 20 nm were randomly deposited on the external surface of HNTs/Fe3O4. The resultant Ag/HNTs/Fe3O4 exhibited satisfied catalytic activity (with conversion of 100% in 38 min) to the reduction of 4-nitrophenol (4-NP) with sodium borohydride. The catalytic activity was markedly enhanced when the catalysts concentration was increased (the rate constant was gradually increased from 0.40 to 20.18 × 10−3 s−1). Also, the advantage of the obtained magnetic composite catalyst in terms of their fast separation and simple reuse was identified through five successive catalytic and separation process cycles. It could be concluded that Ag/HNTs/Fe3O4 showed satisfied catalytic activity, recoverability, and reusability, which showed great potential for practical application for water treatment.
研究领域:
纳米技术
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环境催化
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材料科学
·
水处理
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DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2017
·
IF 2.903
Zhengfeng Jia,Zhengqi Wang,Chao Liu,Limin Zhao,Junjie Ni,Yuchao Li,Xin Shao,Chao Wang
Silver/polydopamine (Ag/PDA) nanocomposite powders were synthesized by dropping the AgNO 3 solution into aqueous solution containing dopamine (DA) molecules. The friction and wear properties of oil-acid (OA) modified Ag/PDA composites as additives in poly-alpha-olefin (PAO) base oil were measured using four-ball tribometer under different loads. The results show that the PAO containing OA modified Ag/PDA nanoparticles (OAMAgPDA) exhibit a better tribological property than pure PAO. The maximum decrease in wear scar diameter (WSD) and friction coefficient are amounted to 40% and 30%, respectively. The tribofilm containing C, O, N, Ag and Fe exists and plays an important role on reducing friction and increasing wear resistance.
研究领域:
材料科学
·
摩擦学
·
纳米复合材料
·
润滑工程
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Wenxing Luo,Xiaowu Hu,Yinhui Che,Shuai Zu,Qinglin Li,Xiongxin Jiang,Dingjun Liu
Phase change materials (PCMs), which exhibit significant capacity of latent heat absorption and release during the phase change process , have been promisingly used for solar energy conversion and storage. However, the application of organic PCMs for solar energy storage remains a great challenge owing to their low thermal conductivity and liquid leakage problem. In this work, a form-stable PCM with polyethylene glycol (PEG) and epoxy resin (EP) was prepared by melt blending (the mass ratio is 1:1). The experimental results indicated that the leakage problem of PEG was solved by the cross-linking of the molecular chains of PEG and EP. Meanwhile, in order to improve the solar energy conversion capability and thermal conductivity , an extremely low loading (4 wt%) of expanded graphite (EG) modified with Ag nanoparticle was added into the PEG/EP matrix. The results suggested that Ag nanoparticles were uniformly dispersed by electroless silver plating in the surface of EG, and the electroless modified EG was evenly distributed in the PEG/EP matrix. Moreover, the composite fillers exhibited prominent solar energy conversion capability (90.7 %) and higher thermal conductivity (121 %). Therefore, this novel composite has favorable potential in practical applications of solar energy storage.
研究领域:
材料科学
·
能源化学
·
高分子化学
·
热力学
·
纳米复合材料
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2026
·
IF 5.2
Qinqin Qian,Haocheng He,Songyin Fu,Jia Xu,Ho-Pui Ho,Shuwen Zeng,Tao Jiang,Sheqin Lv,Chenjie Gu
The efficient and sensitive monitoring of the interleukin-6 (IL-6) is crucial for the clinical tracking and diagnosis of chronic obstructive pulmonary disease (COPD). Herein, a novel surface-enhanced Raman scattering substrate (RGO@MoS 2 /Ag NPs), comprising an efficient charge-transfer and adsorption layer of reduced graphene oxide (GO) encapsulated in molybdenum disulfide (MoS 2 ) and an electromagnetic enhancement layer of Ag nanoparticles, was developed for the highly sensitive, label-free detection of IL-6. Experimentally, a precursor film consisting of (NH 4 ) 2 MoS 4 and GO was first deposited onto a rough g -C 3 N 4 substrate via spin-coating process. Subsequently, the above precursor film was subjected to a two-step high-temperature annealing process for preparing the RGO@MoS 2 charge transfer layer. Finally, Ag NPs were sputtered onto the RGO@MoS 2 film to induce the localized surface plasmons for the further enhancement of the SERS performance. Leveraging the high specific surface area and exceptional charge transfer properties of RGO@MoS 2 , together with the high-density “hot spots” generated by surface Ag NPs, the fabricated SERS substrate exhibited remarkable electromagnetic and chemical enhancement effects. By using the rhodamine 6G (R6G) as the Raman reporter, it was determined that the lowest detection limit could be as low as 10 −9 M on the optimal SERS substrate, with an enhancement factor of 2.2 × 10 9 . Meanwhile, the substrate also exhibited good uniformity, with a relative standard deviation of 9.84%. Finally, the prepared SERS substrate was used to detect the IL-6, it showed good linear response in the range of 5.0-1000 pg/mL, with a detection limit as low as 0.41 pg/mL.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2026
·
IF 15.6
Junqing Zhang,Yachao Zeng,Gong Zhang,Jia Yu,Hui Gao,Xiaowei Du,Yangning Zhang,Tuo Wang,Peng Zhang,Jinlong Gong
Electrolysis of (bi)carbonates into valuable chemicals using renewable electricity is an attractive strategy to integrate CO 2 capture and valorization systems for reducing carbon emissions. Optimizing the proton concentration on the catalyst surface in (bi)carbonate electrolyzers can enable rapid local CO 2 release, making it a promising approach for enhancing electrocatalytic performance. This paper describes an efficient surface modification strategy using organic molecules with low p K a values to facilitate the accumulation of protons near the electrode. Operando Raman results prove that the modifier could promote pH swinging and increase the local CO 2 concentration. Consequently, when operated at a current density of 100 mA cm −2 , the acid-modified catalyst exhibited a CO Faradaic efficiency of 60%, higher than that of the base-modified catalyst, producing syngas with a CO/H 2 ratio of 0.5 at the cell voltage of 3.3 V. The proposed method offers promising new solutions for the development of commercially relevant integrated CO 2 reduction systems.
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Ze-Xian Chen,Yuan Zou,Ruo-Zhou Li,Yuan-Jun Song,Zong-Ru Yang,Lei Shi,Tong Zhang
The surging power density and thermal demands of advanced electronic devices necessitate conductive pastes that can undergo pressureless sintering at low temperatures while maintaining reliable performance under high-temperature operating conditions─requirements that conventional Sn-based solders can no longer meet. Cu@Ag core–shell nanoparticles offer a compelling alternative by integrating the cost-effectiveness and low electrochemical migration of Cu with the oxidation resistance of Ag. However, thermal dewetting of the Ag shell during heating significantly compromises the joint integrity and reliability. Here, we report a surface modification strategy that effectively suppresses the surface energy of Cu@Ag nanoparticles, enabling exceptional structural stability up to 250 °C without Ag shell dewetting. By incorporating surface-modified Ag nanoparticles, we formulate a bimodal conductive paste that achieves pressureless sintering at low temperatures and delivers a maximum shear strength of 20.18 MPa, which is on par with or even better than the shear strength of Cu@Ag nanoparticles sintered under a protective gas atmosphere in similar recent work. After 96 h of thermal aging, the shear strength further increased to 30.13 MPa. We performed fracture surface analysis on joints with different shear strengths and proposed a mechanism for the shear resistance of Cu@Ag paste joints at varying sintering levels. This work offers a practical and scalable approach for developing high-performance, low-cost conductive pastes and paves the way for the broader adoption of Cu@Ag-based pastes and adhesives in advanced electronic packaging.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）