OPTICS EXPRESS
·
2022
·Vol. 30
·期 18
·32509-32527
·
IF 3.833
Fengrui Li,Baojie Shan,Xiaofei Zhao,Chang Ji,Zhen Li,Jing Yu,Shicai Xu,Yang Jiao,Yang Jiao,Chao Zhang,Baoyuan Man,Baoyuan Man
The coordination of piezoelectric and plasmonic effects to regulate the separation and migration of photo-generated carriers is still a significant method to improve the performance of visible-light photoresponse. Herein, we propose the PVDF@Ag-ZnO/Au composite nanofiber membranes utilizing the piezoelectric and plasmonic effects to promote the photocatalytic degradation of organic dyes. Here, ZnO nanorods can generate a built-in electric field under vibration to separate electron-hole pairs. The Schottky junction formed by noble metal/semiconductor can not only inhibit the recombination of photo-generated carriers and accelerate the migration of carriers, but also enhance the utilization of visible light. In addition, the structure has excellent flexibility and easy recycling characteristics. We demonstrate that the plasmonic effect of noble metal can enhance the light response of membranes and broaden light absorption from ultraviolet to visible light region. With the help of the surface-enhanced Raman scattering (SERS), modulation effects of the piezoelectric effect on light response is proved. For catalytic processes, rhodamine B (98.8%) can be almost completely degraded using PVDF@Ag-ZnO/Au within 120 minutes in the piezoelectric photocatalysis process, which is 2.2 and 2.8 times higher than photocatalysis and piezoelectric catalysis, respectively. This work provides a promising strategy for harnessing solar and mechanical energy.
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DOI
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Zhang Gongguo,Ma Yanyun,Liu Feng,Tong Zhibo,Sha Jingquan,Zhao Wenjun,Liu Maochang,Zheng Yiqun
We report a facile synthesis of Au@CuxO core–shell mesoporous nanospheres with tunable size in the aqueous phase via seeded growth. The success of the current work relies on the use of a halide-free copper (Cu) precursor and n-oleyl-1,3-propanediamine as a capping agent to facilitate the formation of a copperish oxide shell with a mesoporous structure and the presence of mixed oxidation states of Cu. By varying the amount of spherical Au seeds while keeping other parameters unchanged, their diameters could be readily tuned without noticeable change in morphology. As compared with commercial Cu2O, the as-prepared Au@CuxO core–shell mesoporous nanospheres exhibit the higher adsorption ability, enhanced activity, and excellent stability toward photocatalytic degradation of methyl orange (MO) under visible light irradiation, indicating their potential applications in water treatment.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2018
·
IF 2.88
Jian Zhu,Na Wu,Fan Zhang,Xin Li,Jianjun Li,Junwu Zhao
The surface-enhanced Raman signals of 4-Aminobenzenethiol (4-ABT) adsorbed on the surface of triangular Au-AuAg hierarchical-multishell nanostructure have been investigated. Here, the approach to produce core-cavity-shell sandwich nanostructures presented as Au-AuAg is the same as preparing metal nanoparticles with hollow morphology, in which the galvanic replacement reaction takes place between silver and chloroauric acid. In this paper, we directly mix 4-ABT with gold nanoparticles and drop it on glass slides to study the effect of nanoparticles on signal enhancement of Raman spectrum , avoiding the cumbersome process of preparing metal-molecular-metal three-layer structure as reported. A significant increase in the SERS intensity of b 2 mode around 1140 cm −1 was observed, which could quantify the concentration of 4-ABT indirectly. In a certain range, the Raman intensity gradually increases with the increasing intermediate gap, which has a strong relationship with dipole plasmon hybridization of core-dielectric-shell sandwich nanostructure. Moreover, Raman spectrum results show that the Au-AuAg substrate can produce signal intensity about 3.8 × 10 2 times stronger than that of 4-ABT alone and the detection limit was as low as 0.1 μM in solution.
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高影响因子
Small
·
2023
·Vol. 19
·期 22
·2208234
·
IF 13.3
Qingchao Fan,Hongwei Fan,Kerui Li,Chengyi Hou,Qinghong Zhang,Yaogang Li,Hongzhi Wang
Stretchable electrochromic (EC) devices that can adapt the irregular and dynamic human surfaces show promising applications in wearable display, adaptive camouflage, and visual sensation. However, challenges exist in lacking transparent conductive electrodes with both tensile and electrochemical stability to assemble the complex device structure and endure harsh electrochemical redox reactions. Herein, a wrinkled, semi-embedded Ag@Au nanowire (NW) networks are constructed on elastomer substrates to fabricate stretchable, electrochemically-stable conductive electrodes. The stretchable EC devices are then fabricated by sandwiching a viologen-based gel electrolyte between two conductive electrodes with the semi-embedded Ag@Au NW network. Because the inert Au layer inhibits the oxidation of Ag NWs, the EC device exhibits much more stable color changes between yellow and green than those with pure Ag NW networks. In addition, since the wrinkled semi-embedded structure is deformable and reversibly stretched without serious fractures, the EC devices still maintain excellent color-changing stability under 40% stretching/releasing cycles.
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高影响因子
Materials
·
2022
·Vol. 15
·期 4
·1498
·
IF 3.748
Guangyuan He,Xiaoyu Han,Shiyi Cao,Kaimin Cui,Qihang Tian,Jihong Zhang
The detection performances of noble metal-based surface enhanced Raman spectroscopy (SERS) devices are determined by the compositions and geometries of the metal nanostructures, as well as the substrates. In the current study, long spiky Au-Ag alloy nanostars were synthesized, and both core diameters and spike lengths were controlled by Lauryl sulfobetaine concentrations (as the nanostructure growth skeleton). The long spiky star geometries were confirmed by transmission electron micrograph images. Elements energy dispersive spectrometer mapping confirmed that Au and Ag elements were inhomogeneously distributed in the nanostructures and demonstrated a higher Ag content at surface for potential better SERS performance. Selected synthesized spiky nanostars were uniformly assembled on multi-mode silica fiber for probe fabrication by silanization. The SERS performance were characterized using crystal violet (CV) and rhodamine 6G (R6G) as analyte molecules. The lowest detection limit could reach as low as 10−8M, with a 6.23 × 106enhancement factor, and the relationship between analyte concentrations and Raman intensities was linear for both CV and R6G, which indicated the potential qualitative and quantitative molecule detection applications. Moreover, the fiber probes also showed good reproducibility and stability in the ambient atmosphere.
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高影响因子
ANALYTICAL SCIENCES
·
2020
·Vol. 36
·期 9
·1045-1051
·
IF 2.049
Ze WANG,Bin DONG,Xiaoqian CUI,Qian FAN,Yanfu HUAN,Hongyan SHAN,Guodong FENG,Qiang FEI
In this study, core-shell Au@Pt nanoparticles (Au@Pt NPs) with peroxidase catalytic activity were synthesized by the seed-mediated method, and were used to catalyze the reaction of luminol–H2O2 to enhance the chemiluminescence (CL) intensity. It was found that thiocyanate (SCN−) can effectively inhibit the catalytic activity of Au@Pt NPs. Based on this phenomenon, a method to detect SCN− by using the Au@Pt NPs-catalytic luminol–H2O2 CL system was established, which has an ultra-low detection limit and an ultra-wide linear range, as well as the advantages of being simple and having low-cost and convenient operation. The research mechanism indicated that SCN− could be adsorbed on the surface of Au@Pt NPs and occupies the active sites of Pt nanostructures, which led to a decrease in the amount of Pt0 and a loss of the excellent catalytic activity of Au@Pt NPs. After optimizing the experimental conditions, this assay for detecting SCN− exhibited a good linear range from 5 to 180 nM, and the low detection limit was 2.9 nM. In addition, this approach has been successfully applied to the detection of SCN− in tap-water samples, which has practical application value and embodies good development prospects.
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高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Yingjie Zhao,Li Tian,Shiqi Wu,Xin Zhang,Zhuo Sun,Yue Hu,Yue Wang,Ruizhan Chen,Juan Lu
A sensitive electrochemiluminescence (ECL) sensor has been developed for the determination of permethrin based on iron oxide nanomaterials (Fe 2 O 3 ) and Au nanoparticles (Au NPs). The ECL response of luminol/O 2 system is enhanced obviously due to the synergy effect between Fe 2 O 3 and Au NPs. The possible mechanism of ECL phenomenon is studied. Furthermore, the ECL emission increases with adding permethrin, and the determination of permethrin could be achieved by monitoring the ECL intensity. Under the optimal conditions, the novel ECL sensor achieved an efficient detection of permethrin range from 2.6 × 10 −9 mol L −1 to 4.3 × 10 −5 mol L −1 with a detection limit of 8.7 × 10 −10 mol L −1 . The proposed strategy can provide a simple and reliable approach for determining of permethrin, indicating that it has great application prospects in pesticide detection.
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高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2020
·Vol. 2020
·期 47
·4477-4482
·
IF 2.529
Jiaojiao Su,Xin Huang,Ming Yang
Graphical Au nanoparticles with segregated surface ligands can self-assemble into quasi-sphere-like superstructures. Such self-limiting assembly is induced by the localized metal-phenolic interactions, which also allow the reversible assembly and disassembly of Au nanoparticles by introducing competing ligands. Dynamic nanoparticle assembly represents an important platform for the creation of functional materials with stimuli-responsive properties. In this work, we show that small Au nanoparticles (ca. 5 nm) with mixed surface ligands (citrates and tannic acid) may be assembled into quasi-sphere-like superstructures (ca. 50 nm) induced by the presence of ferric ions. The spontaneous self-limiting assembly is enabled by the localized metal-phenolic interactions as a result of the possible phase separation of citrates and tannic acid on the surface of Au nanoparticles, restricting the growth of ionic cross-linking network. The disassembly may be further achieved by adding ethylenediaminetetraacetic acid as a stronger chelation ligand for ferric ions, allowing the reversible assembly and disassembly of Au nanoparticles. Our results provide new insights into the design of dynamic plasmonic assemblies by manipulating the nature of surface ligands.
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高影响因子
Materials Research Express
·
2020
·Vol. 6
·期 12
·1250b5
·
IF 1.929
Shouyi Huang,Guoqing Jiang,Xinchang Wu,Hua Zhang,Zhe Chen,Anran Chen,Jin Zhang
In terms of developing high-performing, multifunctional hetero-nanostructures, an exact control of the growth dynamics at the interface of metal nanoparticles (NPs) and metal oxides is of great significance. Having this in mind, we reported a facile and efficient approach to anchor and control the growth process of Au NPs on the surface of iron oxide, and to synthesis α–Fe2O3–Au heterogeneous structure. The nanocomposite exhibits its outstanding multifunctional performance, the energy absorption rate and energy transfer efficiency of α–Fe2O3–Au heterogeneous structure is obviously more than that of α–Fe2O3 materials. FDTD simulation results also show that α–Fe2O3–Au heterogeneous structure have excellent absorption light property and surface Raman effect compared to the single materials, and exhibit enhanced analysis enhancement factor (to 5 × 104) with R6G molecule probe in SERS measurement. Furthermore, for the electrocatalytic activity of H2O2, the sensitivity and detection limit is 42.265 μA mM−1 cm−2 and 1.166 μM, respectively. This work provides an innovative synthetic route for new heterogeneously structured nanocomposites.
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高影响因子
SCRIPTA MATERIALIA
·
2013
·Vol. 69
·期 8
·574-577
·
IF 2.821
Limeng Liu,Lianbing Zhong,Baoyou Zhang,Zhonghong Lai,Feng Ye,Zhiguo Zhang,Yu Zhou
The effects of the addition of 5 mol.% aluminum , copper, silver or gold on the densification , microstructures, mechanical properties and oxidation resistance in thin air of TaC ceramics were investigated. Full density and relatively high flexural strength (up to 738 MPa) were observed in the case of the Au addition after spark plasma sintering at 1700 °C for 5 min under 30 MPa pressure. Due to wetting of the TaC grains by a thin metallic film , the consolidated materials showed enhanced oxidation resistance against thin air.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Chenye Xu,Shilin Chen,Wen Sun,Rong Xu,Xiangyuan Yin,Dongsheng Guo,Yaqiong Yang
Background Norepinephrine (NE) as a crucial monoamine neurotransmitter in the central and sympathetic nervous system, plays an important role in different physiological and pathophysiological processes. Brain NE can modulate cerebrospinal fluid flux and neurovascular coupling, regulate cortical and hippocampal neuronal circuitry, and participate the immune system. In addition, the reduced concentration of NE in brain was currently deemed to be the internal reason of major depression. However, development of detection method of NE with high spatiotemporal resolution in living systems remains a great challenge. Results Herein, a plasmon-enhanced fluorescence (PEF) sensor based on Au nanocages (Aucages) were designed and prepared for ultra-sensitive detection of NE. Aucages with porous walls, hollow interior and systematically tunable localized surface plasmon resonance (LSPR) wavelengths (536 nm, 654 nm, 754 nm) were prepared to obtain a highly fluorescent enhancement of Au nanoclusters (Au NCs). Moreover, polyethylene glycol (PEG) with different molecular weight (1000, 5000, 10000 Da) were applied to control the distance between the Aucages and Au NCs. 3D-FDTD simulation results indicated that the fluorescence enhancement was primarily due to the internal and external enhanced electric field effects of Aucages. This sensor was applied for the turn-on detection of NE in commonly used clinical injectable norepinephrine bitartrate with the recovery rate of 98.06-105.34%. Meanwhile, real-time fluorescence imaging of NE at living pheochromocytoma (PC-12) cells was explored with a red-emitted fluorescence. Significance This study first employed Aucages with more “hot spot” for red-emitted Au NCs to realize fluorescence enhancement. It provides a new method for the development of more sensitive, accurate and convenient analysis of NE in clinical drug analysis, cell monitor and metabolism study.
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产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 8
·1826
·
IF 4.6
Na Zhou,Xueli Wu,Shaoxia Wang,Jianfei Qu,Yang Tan,Chuanlei Luan,Xiuli Yin,Xuran Wu,Xuming Zhuang
In this work, amino-modified ZIF-90 (NH2-ZIF-90) was prepared by using butylamine as a modifier, and its effectiveness in adsorbing Au(III) from environmental samples was investigated. The morphology and structure of NH2-ZIF-90 were analyzed via SEM, XRD, FT-IR, and XPS. Optimal adsorption occurred after 12 h of shaking in a pH = 5 aqueous solution with 2 mg mL−1NH2-ZIF-90. The adsorption kinetics conformed to a pseudo-second-order model, and the equilibrium data fit the Freundlich isotherm model well. Finally, NH2-ZIF-90 was successfully used in lake water and tap water samples for Au(III) adsorption, with recovery rates ranging from 81.0% to 93.3%. This study presents a novel approach for addressing Au(III) adsorption challenges.
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）