JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 16
·21297-21307
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IF 2.478
Cao Yong,Luo Penghui,Xu Yang,Zhang Cong,Tian Chang,You Yuanqi,Tian Meiling,Wang Liqiong,Zhou Shenggang
In this paper, a hydrothermal synthesis method synthesized a foamed nickel (NF)-supported Ag-doped Ag 2 S@MoS 2 hydrogen evolution catalyst. Silver doping can improve the conductivity of MoS 2 , thereby improving the hydrogen evolution activity of MoS 2 . Compared with a single MoS 2 , the Ag 2 S@MoS 2 electrode has a larger specific surface area and has many highly catalytic S edges. In 1 M KOH, the overpotential of Ag 2 S@Ag 0.33 MoS 2 /NF electrode at 10 mA cm −2 is approximately 188 mV. Comparing with the overpotential of NF (391 mV) and MoS 2 /NF (290 mV), it is much lower. Further changing the amount of silver added, the overpotential of Ag 2 S@Ag 0.5 MoS 2 /NF is further reduced to 165 mV at a current density of 10 mA cm −2 . When the voltage is 0.35 V, the current densities of Ag 2 S@Ag 0.33 MoS 2 /NF (42.45 mA cm −2 ) and Ag 2 S@Ag 0.5 MoS 2 /NF (55.5 mA cm −2 ) are higher than those of NF (4.91 mA cm −2 ) and MoS 2 /NF (20.51 mA cm −2 ).
研究领域:
材料科学
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电化学
·
催化
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DOI
高影响因子
Analytical Methods
·
2025
·
IF 2.6
Jinran Chen,Xiurui Ke,Zhou Zhou,Wenqi Ye,Hong Liu,Wei Zhang,Xiaohong Liu
We report the fabrication of a substrate with cavity-nanorods and decorated with Ag-nanoplates (C-NR@Ag). The cavities on the substrate are formed by metal assistant chemical etching, and the Ag-nanoplates in the cavities by galvanic cell deposition enhance the SERS performance effectively. Analytes in solution are adsorbed on Ag-nanoplates and located in hot spots, which enhance the SERS performance effectively. The enhancement factor of the Ag-nanoplates decorated on nanorod cavities is calculated to be 3.6 × 106, which is about 3 fold higher than that on the nanorods. The C-NR@Ag substrate is able to detect polychlorinated biphenyls (PCBs) with the lower limit of detection at 1.0 × 10−12 M. Additionally, due to the semi-volatile nature of PCB-77, the lower limit of detection of the C-NR@Ag substrate for PCB-77 was 1.0 × 10−11 M by the non-contact collection method. These results present a novel approach towards enhancing SERS performance and facilitating the rapid detection of PCB-77.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
RARE METAL MATERIALS AND ENGINEERING
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2018
·
IF 0.29
Han Wensong
Cu-Ag particles with different molar ratios have been prepared in the hyperbranched polyester matrix using ascorbic acid as a reducing agent. The third generation hyperbranched polyester has been synthesized by step by step polymerization using the first generation hyperbranched polyester as core molecular and 2, 2-dimethylol propionic acid as branched monomer. The synthesized hyperbranched polyester and Cu-Ag alloy were characterized by FT-IR, 1 H-NMR, UV-vis spectra, X-ray diffraction (XRD), SEM, Energy Dispersive X-ray (EDX), Laser particle size measurement, TEM, etc. The XRD and EDX studies confirm the formation of Cu-Ag alloy. Laser particle size measurement, SEM and TEM studies show that the particles of the Cu-Ag alloy are well-dispersed with average size of 120 nm. The thermal properties of the Cu-Ag alloy have been studied by thermogravimetric Analysis (TGA). The results show that the measurement values are close to the theoretical ones.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 24
·7219-7229
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IF 6.641
Xiaole Zhang,Dalei Song,Qi Liu,Rongrong Chen,Jindi Hou,Jingyuan Liu,Hongsen Zhang,Jing Yu,Peili Liu,Jun Wang
The reasonable design of semiconductor metal oxides modified by elemental doping and surface functionalization has been proven to be an effective method to improve the gas sensing abilities of chemiresistor-type sensors. In this work, Ni-doped In2O3 nanorods were fabricated via simple oil bath and annealing processes. To further enhance their gas sensing performances, Ag functionalization was carried out by a subsequent chemical reduction process. The experimental results reveal that these composites exhibit excellent formaldehyde sensing performance compared with pure In2O3 nanorods. In particular, 6%-Ag/Ni5.0In presents significantly enhanced gas sensing performance toward 100 ppm formaldehyde gas at a low working temperature (160 °C) with high sensitivity (123.97), fast response speed (1.45 s/58.2 s), and good selectivity and stability. Our research reveals that the improvement in sensing performance toward formaldehyde can be attributed to the large specific surface area, high relative contents of OV and OC components, electronic sensitization and the catalytic effect of Ag. The results provide an effective strategy to achieve excellent gas sensing performance for formaldehyde gas sensors.
研究领域:
材料科学
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传感器技术
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DOI
高影响因子
Materials Research Express
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2021
·Vol. 8
·期 7
·075001
·
IF 1.62
Haibin Xue,Xuewei Gao,Xiangnan Feng,Shan He,Feifei Zhao,Guiju Zhang,Xinrui Wang,Xiaobo Luo,Shanyue Guan
The developing a green and facile synthetic approach of Ag-based antibacterial nanomaterials with controlled composition, size, and shape, to acquire high antibacterial activity and long-term durability, is of vital importance and remains a challenging goal. Herein, a novel LDHs-supported Ag antibacterial nanomaterial (Ag/CoAl-LDHs) are fabricated via an in situ deposition of the Ag nanoparticles onto the CoAl-LDHs surface. X-ray diffraction pattern (XRD) and High-resolution TEM (HRTEM) measurements confirm that the uniform Ag nanoparticles (the average particle size of 16.5 nm) are highly dispersed and firmly anchored onto CoAl-LDHs surface. As revealed by x-ray photoelectron spectroscopy (XPS), the CoAl-LDHs nanoplates play the roles of both a support and a reductant without any external, and there was a redox reaction between Co2+ in LDHs layers and Ag+ in AgNO3 solution, giving rise to in situ loading of Ag nanoparticles onto LDHs. Moreover, antibacterial experiments verify that Ag/CoAl-LDHs not only have efficient antibacterial activity against both Escherichia coli and Staphylococcus aureus, but also exhibit very stable antibacterial properties for both bacteria. Therefore, this research demonstrates a successful paradigm for the rational design and preparation of new antibacterial nanomaterials with high antibacterial activity and long-term durability.
研究领域:
材料科学
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微生物学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2022
·Vol. 23
·期 19
·11197
·
IF 6.208
Xiaoxiao He,Xiaohong Ma,Yujun Yang,Xi Hu,Teng Wang,Shiyue Chen,Xiang Mao
In this work, we firstly report the preparation of heterogeneously assembled structures Au-Ag nanoclusters (NCs) as good drug carriers with high loading performance and biocompatible capability. As glutathione-protected Au and Ag clusters self-assembled into porous Au-Ag NCs, the size value is about 1.358 (±0.05) nm. The morphology characterization revealed that the diameter of Au-Ag NCs is approximately 120 nm, as well as the corresponding potential ability in loading performance of the metal cluster triggered-assembling process. Compared with individual components, the stability and loading performance of heterogeneous Au-Ag NCs were improved and exhibit that the relative biocompatibility was enhanced. The exact information about this is that cell viability was approximately to 98% when cells were incubated with 100 µg mL−1particle solution for 3 days. The drug release of Adriamycin from Au-Ag NCs was carried out in PBS at pH = 7.4 and 5.8, respectively. By simulating in vivo and tumor microenvironment, the release efficiency could reach over 65% at pH = 5.8 but less than 30% at pH = 7.2. Using an ultrasound field as external environment can accelerate the assembling process while metal clusters triggered assembling Au-Ag NCs. The size and morphology of the assembled Au-Ag NCs can be controlled by using different power parameters (8 W, 13 W, 18 W) under ambient atmosphere. Overall, a novel approach is exhibited, which conveys assembling work for metal clusters triggers into heterogeneous structures with porous characteristic. Its existing properties such as water-solubility, stability, low toxicity and capsulation can be considered as dependable agents in various biomedical applications and drug carriers in immunotherapies.Keywords:Au-Ag NCs;heterogeneous structures;assembling;drug carriers;biocompatibility
研究领域:
纳米医学
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材料科学
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生物医学工程
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DOI
PubMed
高影响因子
Biosensors-Basel
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2023
·Vol. 13
·期 8
·766
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IF 5.4
Xiaoxiao Zhou,Shouhui Chen,Yi Pan,Yuanfeng Wang,Naifeng Xu,Yanwen Xue,Xinlin Wei,Ying Lu
In order to improve the detection performance of surface-enhanced Raman scattering (SERS), a low-cost Au@Ag nanorods (Au@Ag NRs) substrate with a good SERS enhancement effect was developed and applied to the detection of malachite green (MG) in aquaculture water and crayfish. By comparing the SERS signal enhancement effect of five kinds of Au@Ag NRs substrates with different silver layer thickness on 4-mercaptobenzoic acid (4-MBA) solution, it was found that the substrate prepared with 100 µL AgNO3had the smallest aspect ratio (3.27) and the thickest Ag layer (4.1 nm). However, it showed a good signal enhancement effect, and achieved a detection of 4-MBA as low as 1 × 10−11M, which was 8.7 times higher than that of the AuNRs substrate. In addition, the Au@Ag NRs substrate developed in this study was used for SRES detection of MG in crayfish; its detection limit was 1.58 × 10−9M. The developed Au@Ag NRs sensor had the advantages of stable SERS signal, uniform size and low cost, which provided a new tool for SERS signal enhancement and highly sensitive SERS detection method development.Keywords:Au@Ag nanorods substrate;surface-enhanced Raman scattering (SERS);malachite green
研究领域:
分析化学
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食品安全检测
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DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
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2018
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IF 2.873
Aijun Cai,Aiying Guo,Liqaing Du,Yanling Qi,Xiuping Wang
In this paper, poplar leaf is used as a template to synthesize hierarchical AgCl-Ag-ZnO composites via a calcination method. Zn(NO 3 ) 2 and AgNO 3 are selected as precursors. During the calcination of the templates, Zn 2+ ions react with oxygen to produce ZnO nanoparticles (NPs), Cl − ions in leaf cells combine with the external Ag + ions to form AgCl, and Ag + ions are reduced by reducing agents in leaf to Ag NPs. The morphology, structure and visible-light response of the as-prepared hierarchical AgCl-Ag-ZnO composites are determined. The composites exhibit a strong photocatalytic activity toward the degradation of Rhodamine B (RhB) under visible-light irradiation. The AgCl-Ag-ZnO composites display an enhanced photocatalytic activity, compared with the leaf-templated AgCl-Ag and ZnO. A photocatalytic mechanism is proposed, based on the efficient separation of photoexcited electron-hole pairs due to the surface plasmon resonance (SPR) effect of metal Ag.
研究领域:
材料科学
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化学
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环境科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Guannan Yang,Pengyu Wang,Yu Liu,Shuzhou Lu,Bo Luo,Tao Lai,Shiwo Ta,Tingyu Lin,Jiye Luo,Yu Zhang,Chengqiang Cui
Ag-coated Cu particles (Cu@Ag particles) are highly anticipated bimetallic materials with wide electronic applications. However, it is still crucially challenging to obtain well-covered Ag shells and facilitate the synthetic process, and the sintering/migration behaviors of Cu@Ag particles are also poorly understood. In this study, we develop a facile Ag coating method for Cu@Ag particles with the assistance of double complexing agents. Electrochemical analysis reveals that the complexing effect can effectively reduce the potential difference of the Cu-Ag replacement reaction, and thereby improve the coating quality. Cu@Ag particles with compact and uniform Ag shells are obtained, with Ag contents as low as ~10 at%. The as-prepared Cu@Ag particles show significantly improved oxidation resistance and reliable sintering property. Moreover, the Cu@Ag particles exhibit superior ion migration resistance even better than both Cu and Ag particles under an oxygen-containing environment. The results could provide helpful basis for understanding the synthesis, sintering and migration processes of Cu@Ag particles. The comprehensive performance of Cu@Ag particles makes them a promising interconnected material in future electronic industry.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
ChemistryOpen
·
2024
·
IF 2.5
Dam Xuan Thang,Nguyen Thuy Chinh,Nguyen Thi Binh Minh,Trinh Hoang Nghia,Thai Hoang
Graphical This study focuses on a green synthesis of Cu 2 O and Cu 2 O−Ag particles using ascorbic acid (LAA) as a reducing agent in the presence of two surfactants, polyethylene glycol 6000 and sodium dodecyl sulfate. The hybrid materials exhibit strongly antibacterial activity and are potential for the application in the acrylic emulsion coating. Nanomaterials based on metal oxides, especially Cu 2 O, have received much attention in recent years due to the many unique properties of the surface plasmon resonance they provide. The report presented the co-precipitation method, a simple preparation method to produce Cu 2 O oxide particles. In addition, to improve the unique antibacterial properties of Cu 2 O, a proposed method is to attach Ag nanoparticles to the surface of Cu 2 O particles. The Cu 2 O and Cu 2 O−Ag particles were synthesized based on redox reactions using ascorbic acid (LAA) as a reducing agent. Moreover, in this experiment, two surfactants, polyethylene glycol 6000 (PEG 6000) and sodium dodecyl sulfate (SDS), were added during the manufacturing process to create particle samples and particle combinations with better properties than the original sample. Changes in the characteristics and properties of particle samples are determined by many different physical and chemical methods such as ultraviolet-visible spectroscopy (UV-Vis), infrared spectroscopy (IR), noise X-ray radiation (XRD), scanning electron microscope (SEM), dynamic light scattering (DLS), energy dispersive X-ray spectroscopy (EDS), and transmission electron microscopy (TEM). Finally, the activity against bacteria, including E. coli and S. aureus , was also tested using the agar well diffusion method to determine the zone of inhibition. The results improved the particle size value, which decreased by half to 200 nm when two additional surfactants, PEG and SDS, were added. In addition, the antibacterial ability has also been shown to increase significantly when the diameter of the bacterial inhibition zone increased significantly, reaching values of 20 mm (Cu 2 O/Ag/SDS) and 32 mm (Cu 2 O/Ag/PEG) for the E. coli bacterial strain. The initial test sample was only about 14 mm in size. The S. aureus bacterial strain also had a similar improvement trend after adding Ag to the Cu 2 O surface with the appearance of two surfactants, SDS and PEG. The inhibition zone diameter values reached the optimal value at 36 mm in the Cu 2 O/Ag/PEG particle combination sample compared to only the initial 26 mm in the Cu 2 O particle sample. Finally, the particle samples are added to the acrylic emulsion paint film to evaluate the changes. Positive results were obtained, such as improvement in adhesion (1.22 MPa), relative hardness (240/425), and sand drop resistance (100 L/mil) in the Cu 2 O/Ag/PEG particle combination sample, which showed the correctness and accuracy of the research.
研究领域:
材料科学
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生物学
·
化学工程
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Ruikai Wang,Zhichao Hao,Haiyan Li,Chenghui Xia,Bohua Dong,Lixin Cao
Optimizing the interfacial action of photoanode for photoelectrochemical (PEC) behavior to facilitate charge transport is essential for enhancing solar-to-fuel efficiency. Herein, a typical CuWO 4 /NiFe-LDH/Ag photoanode was reported and an alternative pathway for charge transfer in the PEC process through surface states mechanism was elucidated. In particular, the layer double hydroxides (NiFe-LDH) acted as charge-transfer agents to facilitate the transfer of photogenerated carriers; while the surface plasmon resonance (SPR) effect of the Ag provided hot electrons, which increased the carrier concentration and promoted the charge separation. The influence of presence of surface states on the PEC process was systematically illustrated. Experimental results indicated that the optimized CuWO 4 /NiFe-LDH/Ag photoanode displayed a photocurrent that was more than an order of magnitude larger than that of the pure CuWO 4 (increasing from 0.30 mA cm −2 to 1.45 mA cm −2 at 1.23 V vs. RHE), accompanied by favorable electrochemical impedance and stability (maintaining 92.4%). Importantly, increasing the available filled surface states could be beneficial in enhancing the PEC behavior. This work provided additional insights into photoanode charge transport in PEC processes.
研究领域:
材料科学
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能源科学
·
光催化
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2021
·
IF 7.963
Tao Li,Yuhua Li,Xike Zhang,Jiawei Yuan,Junkang Guo,Pan Wang,Gehong Wei,Chun Chen
The widespread application of metal-based nanoparticle (MNPs)/reduced graphene oxide (rGO) composites inevitably leads to their release into soils. However, we lack a detailed understanding of the bacterial community response to MNPs-rGO exposure in farmland soils. Here, we conducted a soil microcosm experiment to analyze the potential impact of MNPs-rGO on bacterial communities in two field soils via high-throughput sequencing. The change in alpha diversity of bacterial communities was more susceptible to Ag-rGO and ZnO-rGO treatments than CuO-rGO. In both soils, MNPs-rGO significantly changed the bacterial community structure even at a low dose (1 mg kg −1 ). The bacterial community structure was most strongly affected by Ag-rGO at 30 days, but the greatest changes occurred in ZnO-rGO at 60 days. The differences in soil properties could shape bacterial communities to MNPs-rGO exposure. Distance-based redundancy analysis and functional annotation of prokaryotic taxa showed that some bacterial species associated with nitrogen cycling were greatly influenced by Ag-rGO and ZnO-rGO exposure. In sum, Ag-rGO and ZnO-rGO may potentially affect bacterial communities and nitrogen turnover under long-term realistic field exposure. These findings present a perspective on the response of bacterial communities to MNPs-rGO and provide a fundamental basis for estimating the ecological behavior of MNPs-rGO.
研究领域:
环境科学
·
微生物学
·
土壤学
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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）