JOURNAL OF RAMAN SPECTROSCOPY
·
2019
·Vol. 50
·期 10
·1468-1476
·
IF 2.809
Junhua Tong,Zhixing Xu,Yaoxing Bian,Yutao Niu,Yongyi Zhang,Zhaona Wang
Surface-enhanced Raman scattering (SERS) is a useful detection technique for molecule recognition. However, the relative difficulty in producing low-cost highly active SERS substrates in large quantities hinders their practical implementation. Here, a fast and facile approach using a one-step solution-phase synthesis is proposed to directly achieve highly active fibrous SERS substrates by uniformly and densely growing silver nanoflowers on reduced graphene oxide fibers within several minutes. Attributed to the abundance of nanogaps throughout the silver nanoflower network, the fibrous substrate exhibits superior stability and high sensitivity in the SERS detection of Rhodamine 6G, with a detection limit of 10 −12 M. Importantly, the proposed method is energy efficient and can work well at room temperature and manually stirring conditions based on naturally shed hair and plant fibers. Due to the advantages of high-volume production, the processing cost is greatly reduced to approximately $0.008 for each substrate. This newly designed approach may greatly improve the practical application of SERS detection in environmental monitoring, medicine and food safety, especially in resource-limited environments.
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JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Yan Tong,Xiaofeng Lu,Weining Sun,Guangdi Nie,Liu Yang,Ce Wang
A high-performance hydrogen generation system based on the electrospun polyacrylonitrile (PAN)/Ag/Pd composite nanofibers , which were prepared by microwave reducing the electrospun PAN/AgNO 3 nanofibers and followed by a replacement reaction has been demonstrated. The morphology of the as-prepared PAN/Ag/Pd composite nanofibers and the metal nanoparticles on the fibers were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high resolution TEM (HRTEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) measurements. It has been demonstrated that the obtained PAN/Ag/Pd composite nanofibers possess fine morphology and high catalytic activities for H 2 generation from aqueous solution of ammonia borane (NH 3 BH 3 , AB). The H 2 generation test exhibited that the catalyst had excellent catalytic activity (with turnover frequency (TOF) of 377.2 mol H 2 h −1 (mol Pd) −1 ), good recycle stability and easy-separation from the reaction system. This new kind of nanofibers possesses great potential application for the new clean energy development.
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JOURNAL OF LUMINESCENCE
·
2016
·
IF 2.693
Yanyan Chen,Jigang Min,Qiang Wang,Shenjie Li
Aqueous solution deposition of metal chalcogenide semiconductor thin films is considered a green and low-cost approach. So it is hard to find a general aqueous solution approach to deposit various kinds of high-quality metal sulfide quantum dots thin films . Here, we describe a green and robust aqueous solution approach, and five types of metal sulfide precursor solutions (Cu(CH 3 COO) 2 , AgNO 3 , Zn(CH 3 COO) 2 , Cd(CH 3 COO) 2 ·2H 2 O, Ni(CH 3 COO) 2 ·4H 2 O) can be prepared at room temperature under air atmosphere. By this green route, luminescent Ag-doped Zn x Cd 1− x S semiconductor films have been successfully synthesized via a facile and green method in the open air at 260 °C using precursors. NH 3 ·H 2 O (28–30%) were used as solvent, and 3-mercaptopropionic acid was used as the capping agents. As-prepared quantum dot thin films exhibit a tunable emission covering the whole visible light region. The absolute photoluminescence quantum yields can reach as high as 24.6%, which have a high potential application in luminescent, transparent, and conductive thin films.
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CHINESE JOURNAL OF CHEMISTRY
·
2023
·Vol. 42
·期 6
·617-622
·
IF 5.4
Wei-Xing Chen,Yu-He Xu,Cui-Cui Wang,Lei Qiao,Zi-Yan Guo,Wen-Juan Tian,Zhong-Ming Sun
Comprehensive Summary Binary polyantimony clusters, namely [Cu 2 Sb 14 ] 4– and [Ag 2 Sb 14 ] 4– , containing coinage metals, were successfully synthesized and characterized, in which two homoatomic Sb 7 3– subunits are bridged by two coinage metals in η 4 : η 1 and η 1 : η 1 coordination modes, respectively. In [Cu 2 Sb 14 ] 4– , two bridging Cu ions and two Sb atoms form a planar rhombic unit, which was revealed to have antiaromatic properties by theoretical calculations. Further electron structure and bonding analysis confirmed the presence of delocalized bonds in the rhombic unit and the metallophilic interaction between two formal M + ions.
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Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 17
·4683-4690
·
IF 5.976
Bingyan Zhu,Wenyu Ji,Zongquan Duan,Yang Sheng,Ting Wang,Qilin Yuan,Han Zhang,Xiaosheng Tang,Hanzhuang Zhang
During the last three decades, there has been significant development of quantum dot light emitting diodes (QLEDs) due to their widespread applications. However, common QLEDs depend on cadmium, which is toxic and limits their all-inclusive applications. To address this challenge, herein, we report a highly efficient and low turn-on voltage Cd-free inverted QLEDs with eco-friendly Zn–Ag–In–S quantum dots as the emissive layers. The device performance is closely related to the properties of the hole transport layer (HTL), which are explored by employing different hole transport materials, namely, 4,4′,4′′-tris(carbazol-9-yl) triphenylamine (TCTA) and N,N′-bis(naphthalen-1-yl)-N,N′ bis(phenyl)-benzidine (NPB). Although the energy levels of the lowest unoccupied molecular orbitals (LUMO) of TCTA and NPB are similar, electron leakage from the QDs to NPB is observed, which deteriorates the device performance. An excellent QLED can be achieved if a thick TCTA layer is introduced next to the QDs. Additionally, the QLED with a stepwise HTL consisting of TCTA/NPB presents a slightly higher current efficiency than the TCTA-only device, revealing that the reduction in holes accumulated at the QDs/HTL interface is beneficial for enhancing the device efficiency. Compared to the previously reported Zn–Ag–In–S based QLEDs, our device exhibits a low turn-on voltage of 2.2 V and the highest luminance (over 2000 cd m−2) and efficiency (larger than 2.1 cd A−1).
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International Journal of Electrochemical Science
·
2023
·Vol. 12
·期 6
·5511-5520
·
IF 1.5
Xingpu Qi,Jianzhong Qian,Tong Chen,Daoli Lu,Bin Chen
With a chemical and eco-friendly in situ reduction technique, an excellent Ag-Pd bimetallic nanoparticle (Ag-Pd)-based hybrid was successfully synthesized in this study. To determine copper(II) ions in water, this work employed differential pulse adsorptive stripping voltammetry (DPAdSV) and preconcentration methods. Furthermore, the sensor feasibility was studied with river and tap water as real specimens. The results revealed the potential of the proposed electrochemical sensor to be applied for the early testing of water quality based on its desirable behavior in Cu(II) determination in real specimens.
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CATALYSIS TODAY
·
2018
·
IF 4.667
Shuanglong Ma,Sihui Zhan,Yuguo Xia,Pengfei Wang,Qianlei Hou,Qixing Zhou
The Ag/ZnO/g-C 3 N 4 composite photocatalyst, which was synthesized by thermal polymerization of a melamine precursor combined with solvothermal reaction, was used as a visible-light-driven biocide toward Escherichia coli ( E. coli ). The Ag/ZnO/g-C 3 N 4 composite displayed considerably increased visible-light-driven bactericidal activity compared to g-C 3 N 4 , Ag/g-C 3 N 4 , and ZnO/g-C 3 N 4 powders. The photocatalytic destruction of E. coli cells was verified by fluorescence-based cell live/dead analysis and SEM. The mechanism of increased bactericidal effect was studied by UV–vis diffuse reflectance spectroscopy, photoluminescence spectroscopy, photocurrent response, and electrochemical impedance spectroscopy (EIS). The enhanced photocatalytic bactericidal effect was attributed to the matching conduction band levels of g-C 3 N 4 and ZnO and the surface plasmon resonance (SPR) effect of Ag nanoparticles, which resulted in enhanced adsorption of visible light, reduced recombination of free charges, and rapid separation and transportation of photogenerated electrons-holes. The disinfection mechanism was investigated using different chemical scavengers and electron spin-resonance spectroscopy (ESR), and indicating the important role of h + and H 2 O 2 . Furthermore, taking into account the bulk availability and better bactericidal effect of Ag/ZnO/g-C 3 N 4 , this work provides a new pathway to develop advanced materials for water disinfection.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Fei Wang,Dongzheng Wu,Yichao Zhuang,Jialin Li,Xianzhen Nie,Jing Zeng,Jinbao Zhao
The nature of dendrite-free magnesium (Mg) metal anodes is an important advantage in rechargeable magnesium batteries (RMBs). However, this traditional cognition needs to be reconsidered due to inhomogeneous Mg deposits under extreme electrochemical conditions. Herein, we report a three-dimensional (3D) Cu-based host with magnesiophilic Ag sites (denoted as “Ag@3D Cu mesh”) to regulate Mg deposition behaviors and achieve uniform Mg electrodeposition. Mg deposition/stripping behaviors are obviously improved under the cooperative effect of nanowire structures and Ag sites. The test results indicate that nucleation overpotentials are reduced distinctly and cycling performances are prolonged, suggesting that the general rules of 3D structures and affinity sites improve the durability and reversibility of Mg deposition/stripping. Besides, a unique concave surface structure can induce Mg to deposit into the interior of the interspace, which utilizes Mg more efficiently and leads to improved electrochemical performances with limited Mg content. Furthermore, in situ optical microscopic images show that the Ag@3D Cu mesh can attain a smooth surface, nearly without Mg protrusions, under 8.0 mA cm–2, which prevents premature short circuits. This report is a pioneering work to demonstrate the feasibility of modification of Cu-based current collectors and the necessity of functional current collectors to improve the possibility of practical applications for RMBs.
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RSC Advances
·
2017
·Vol. 7
·期 74
·46760-46766
·
IF 3.108
Mengjie Li,Weijun Huang,Weijin Qian,Boyang Liu,Hao Lin,Wei Li,Li Wan,Changkun Dong
Ag–ZnO nanocomposites were prepared on alloy substrates by two simple and inexpensive steps, i.e. synthesis of ZnO nanorod arrays (ZNAs) by a low-temperature hydrothermal method, followed by electrophoretic deposition method to coat ZNAs with Ag nanoparticles (NPs). The sizes and densities of the Ag NPs could be facilely adjusted by changing the deposition time. The field emission (FE) performances of Ag–ZnO emitters were improved greatly by adjusting the sizes and densities of the Ag NPs, and the optimized FE performance of the Ag–ZnO emitter was obtained with the lowest turn-on field of 0.86 V μm−1 and a current density up to 7.96 mA cm−2 at 4.45 V μm−1. More importantly, the Ag–ZnO emitter exhibited excellent current stabilities with 1900 min operation under only 6.5% current fluctuation. These results suggest that the Ag–ZnO composite is a promising cathode material for fabrication of future FE devices.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yuteng Hang,Rusha Gopali,Xiaorong Mao,Ling Zhu,Mengyang Tao,Guangjie Gu,Feng Li,Zhangxuan Liu,Xinnan Li,Ruyu Jiang,Xinxin Xu,Ning Bao,Yang Liu
Elevated cholesterol is a major cardiovascular risk factor, but current detection methods are resource-intensive. Non-invasive point-of-care testing is promising yet limited by sensitivity, and the blood-saliva cholesterol correlation requires further investigation. We developed an electrochemical biosensor featuring cholesterol oxidase immobilized on screen-printed carbon electrodes (SPCE) modified with conductive Au-Ag@Au core-shell nanoparticles and Prussian blue/poly-3,4-ethylenedioxythiophene (PB-PEDOT) nanocomposites. Morphological, spectroscopic, and electrochemical analyses (including impedance spectroscopy, heterogeneous electron transfer kinetics, and active surface area quantification) confirmed the biosensor superior conductivity. The biosensor achieved exceptional performance: a broad linear range (0.01–1.0 mM), low detection limit (3.3 μM amperometric LOD; 2.8 μM via EIS), and high sensitivity (57.3 μA/mM·cm 2 amperometric; 781 Ω/mM·cm 2 impedimetric). Clinical validation demonstrated excellent agreement with standard colorimetric methods in human serum and saliva for cholesterol tested in biological compounds and robust stability. A strong serum-saliva correlation (Pearson's correlation coefficient as 0.928) supports noninvasive monitoring feasibility. The anti-interference capability of the proposed biosensor was evaluated against common interferents, including glucose, lactic acid, uric acid, ascorbic acid, bovine serum albumin, cysteine, and their mixture. The results confirmed its high specificity against these typical biological matrix components. Particularly significant is its non-invasive detection capability, which eliminates the need for painful blood draws or invasive sample collection procedures. A key innovation lies in the synergistic integration of conductive Au-Ag@Au core-shell nanoparticles with PB-PEDOT nanocomposites on SPCEs, which significantly enhances electron transfer and catalytic activity, yielding an exceptionally sensitive and stable sensing platform. The biosensor sets itself apart by achieving superior analytical performance concurrently with robust clinical validation in both serum and saliva, firmly establishing its potential for reliable non-invasive cholesterol monitoring.
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产品关联
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高影响因子
PHYSICA SCRIPTA
·
2025
·Vol. 100
·期 10
·105607
·
IF 2.6
Xiaolong Song,Yafang Pan,Shi Wang,Peng Wang,Mingli Wang
Compared with single-metal materials, bimetallic materials exhibit superior oxidation resistance and stability. The Surface-enhanced Raman Scattering (SERS) performance can be effectively modulated by adjusting the concentration of the precursors. Herein, Fe3O4@EDTA@Ag-Cu NPs were successfully synthesized, the SERS performance of the substrate was significantly enhanced by modulating the concentration of the silver and copper precursors. The results indicated that the SERS sample prepared by mixing the dispersion of Fe3O4@EDTA@Ag-Cu NPs with Rhodamine 6G(R6G) solution at a 1:2 volume ratio, achieved a detection concentration as low as (1.0 ± 0.2) × 10−10 M for R6G. Furthermore, the substrate demonstrated high sensitivity, uniformity, temporal stability, reproducibility, and the capability for the rapid detection of benzimidazole in strongly alkaline conditions.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xueyan Chen,Hua Deng,Min Chen,Xiaoxiao Qin,Ling Wang,Changbin Zhang
Supports play a pivotal role in noble metal-supported catalysts by regulating the dispersion, electronic structure, and interfacial interactions of active species, as well as influencing the adsorption and activation of reactants. Herein, we demonstrated that the coordination structure of oxide supports critically dictates the catalytic performance of Ag-based catalysts in formaldehyde (HCHO) oxidation. Although Ag/Al 2 O 3 and Ag/TiO 2 possessed comparable Ag particle sizes, oxidation states, and redox properties, their activities differed substantially: Ag/Al 2 O 3 achieved complete HCHO conversion at 80 °C, while Ag/TiO 2 required 170 °C under identical conditions. In situ DRIFTS results revealed that HCHO was transformed into formate intermediates on both supports, but Al 2 O 3 stabilized two distinct formate configurations, whereas TiO 2 favored a single adsorption mode. More importantly, formates on Ag/Al 2 O 3 decomposed at much lower temperatures than those on Ag/TiO 2 , suggesting enhanced intermediate reactivity. Density functional theory (DFT) calculations confirmed that the diverse coordination environments of surface Al atoms enable multiple formate adsorption modes with lower C H bond dissociation barriers compared to Ti sites. These results establish that the support coordination structure governs intermediate configurations and their transformation kinetics, offering mechanistic insights into the superior oxidation activity of Ag/Al 2 O 3 and providing guidance for the rational design of efficient Ag-based catalysts for HCHO purification.
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