APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yingnan Quan,Jia Li,Mingyue Hu,Maobin Wei,Jinghai Yang,Ming Gao,Yang Liu
A highly sensitive strategy is urgently needed to detect potential cancer biomarkers present at trace levels in the early stages of the disease. Here we report a surface-enhanced Raman spectroscopy (SERS) biosensor that combines enrichment capabilities, MoS 2 @ZnO@Ag, for the ultrasensitive detection of free bilirubin in serum, and was likely to be used for accurate diagnosis of related diseases. The substrate is evolved from the reported MoS 2 @ZnO with Ag nanoparticles attached to it, which integrates the advantages of low cost, simple pretreatment and high sensitivity, and can accurately and quantitatively analyze actual bilirubin samples. The sensing efficiency is evaluated by bilirubin with the detection limit of 10 -8 M. Main emphasis focuses on using MoS 2 @ZnO@Ag SERS substrate to detect the free bilirubin in serum. This substrate exhibits ultrahigh sensitivity in sensing bilirubin in human blood. In this study, the MoS 2 @ZnO@Ag provides a new biosensing technology for the detection of free bilirubin, which is expected to be applied to clinical diagnosis.
研究领域:
生物医学工程
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分析化学
·
临床诊断
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Xiaoni Du,Xiaohong Wang
A new and efficient series of photocatalysts , Bi 5 O 7 NO 3 and Ag/Bi 5 O 7 NO 3 composites, were successfully prepared by a one-pot solution combustion synthesis (SCS) method. Bi(NO 3 ) 3 , C 4 H 6 O 6 , and AgNO 3 were used as the oxidant, fuel, and Ag source, respectively. The crystals structure of the orthorhombic Bi 5 O 7 NO 3 and cubic Ag was characterized by employing XRD and EPMA techniques. Both Bi 5 O 7 NO 3 and Ag/Bi 5 O 7 NO 3 composites showed good photocatalytic degradation efficiencies for methyl orange (MO) under visible-light irradiation. The PL analysis results showed metallic Ag played a vital role in improving the separation of photo-induced electrons and holes, leading to the enhancement of photocatalytic activity. The Ag-5% composite showed the highest photocatalytic degradation efficiency (95% at 60 min), which is 1.5 times more than that of pure Bi 5 O 7 NO 3 .
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
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2018
·
IF 5.116
Wei Li,Shu-ao He,Wei Xu,Ji Li,Xue-chuan Wang
In this research, a series of BiOCl-Ag/AgBr x (BAA x ) heterojunctions with surface plasmon resonance (SPR) effect of metallic Ag were synthesized by a facile one-pot solvothermal method . For the superior photosensitive effect of AgBr co-catalyst, all BAA x samples exhibited much enhanced response to visible light. For the formation of BiOCl-AgBr heterojunction and existence of metallic Ag plasma, the BAA x photocatalysts exhibited very superior interfacial charge migration, and the recombination of photoexcited electron-hole pairs could be effectively controlled. Research showed that the BAA 0.04 heterojunction exhibited the highest photocatalytic activity under visible light irradiation , and various pollutants in water system could be decomposed effectively. Furthermore, the BAA 0.04 heterojunction possessed very robust photostability, its crystal structure and photocatalytic activity almost remained unchanged after being used several times.
研究领域:
材料科学
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环境科学
·
光化学
✓ 已验证
DOI
高影响因子
Journal of the Iranian Chemical Society
·
2024
·
IF 2.2
Fan Zhen,Li Chunxia,Xu Meijie
ZnO/Ag nanocomposite was prepared via in situ method by using silver nitrate and ZnSO 4 as the raw material. ZnO and ZnO/Ag were characterized by utilizing SEM, UV-vis, XRD, FTIR, and so on. The photocataytic degradation behaviors of ZnO and ZnO/Ag for trimethylamine (TEA) in air and solution were studied. The results indicated that ZnO/Ag had better photocatalytic degradation properties on trimethylamine under the condition of 0.06 g catalyst, 2 h photocatalytic time, and 15 A light intensity, and the degradation rates of TEA were up to 44 and 67% in air and solution, respectively. Furtherly, ZnO and ZnO/Ag also indicated perfect photocatalytic degradation properties toward to organic compounds in wastewater. Especially, the harmless treatment of triethylamine was achieved by using photocatalytic degradation method that provided a novel method for treating triethylamine. In all the above results leaded to a good application prospect of ZnO/Ag in the degradation of organic compounds in air and solution.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Yanlin Li,Wenyuan Duan,Jian Wei
At present, there is an urgent need to design sensitive substrates for the Raman analysis system to detect potential substances that have major ramifications for health care and the ecological environment. In this work, CoFe2O4/Ag nanostructures with two different morphologies were successfully synthesized as surface-enhanced Raman scattering (SERS) substrates. The as-prepared strawberry-like CoFe2O4@SiO2@Ag and snowman-like CoFe2O4-Ag Janus not only displayed high sensitivity due to the surface plasma resonance (SPR) of Ag nanoparticles and special micro-nano structure but also showed good stability, which was determined by Raman measurement and enhancement factor calculation. Moreover, excellent magnetic response ensured that the composites could be separated rapidly and reused effectively. It was demonstrated that the as-synthesized CoFe2O4@SiO2@Ag and CoFe2O4-Ag Janus composites had great potential as separable, reusable, and active SERS substrates.
研究领域:
材料科学
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分析化学
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环境科学
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生物医学
✓ 已验证
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
·
分析化学
✓ 已验证
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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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 24
·7219-7229
·
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
·
传感器技术
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产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
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2018
·
IF 2.943
Qiong Liu,Ju Li,Xin Zhong,Zan Dai,Zhong Lu,Hao Yang,Rong Chen
In this work, sphere-like Ag/Bi 2 O 3 nanocomposites with the average size of ca. 170 nm were successfully synthesized by simple deposition-precipitation method. The antibacterial activities of as-prepared Ag/Bi 2 O 3 nanocomposites were evaluated by minimal inhibitory concentration (MIC), minimal bactericidal concentration (MBC) and colony counting methods. It was found that Ag/Bi 2 O 3 nanocomposites displayed greatly improved antibacterial ability against common pathogenic Gram-positive and Gram-negative bacteria in comparison with single-component Bi 2 O 3 nanospheres. More importantly, Ag/Bi 2 O 3 nanocomposites exhibited remarkably outstanding antibacterial activities against clinical drug-resistant bacteria. The antibacterial activity of Ag/Bi 2 O 3 nanocomposite increased with the increase of Ag content and 15 wt% Ag/Bi 2 O 3 nanocomposites showed the highest antibacterial activity. Furthermore, a plausible antibacterial mechanism of Ag/Bi 2 O 3 nanocomposite was proposed. It was believed that the enhanced generation of H 2 O 2 could lead to the membrane leakage of cytosol and the inactivation of respiratory chain dehydrogenaes, which was possibly responsible for the enhanced antibacterial activities of nanocomposites.
研究领域:
材料科学
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微生物学
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医学
✓ 已验证
产品关联
DOI
高影响因子
Chemistry-An Asian Journal
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2012
·Vol. 7
·期 8
·1781-1788
·
IF 4.5
Shaofeng Zhang,Wei Wu,Xiangheng Xiao,Juan Zhou,Jinxia Xu,Feng Ren,Changzhong Jiang
Graphical Silver surfer : Polymer-supported bimetallic nanocomposites (PS-Ag@AuAg) were synthesized by using a seed-growth process. The LSPR of these composites could be tailored over a large scale. The catalytic activity of the nanocomposites was remarkably superior to that of the supported monometallic nanocomposites. Supported noble bimetallic nanomaterials have attracted great interest owing to their applications in catalysis. Herein, polystyrene-supported Ag@AgAu bimetallic nanocomposites were synthesized by using a seed-growth route. The size and degree of coverage of the Ag@AgAu NPs could be controlled by changing the experimental parameters. SEM, TEM, STEM, EDS, and XPS analysis was used to characterize the morphology, structure, and composition of these nanocomposites. We found that the bimetallic nanoparticles on the polystyrene beads had a core–shell structure that was comprised of a Ag core and a AgAu alloy shell. The optical properties of the nanocomposites were also studied by UV/Vis/NIR spectroscopy, which indicated that the localized surface plasmon resonance (LSPR) absorptions of the nanocomposites could be tailored over a large scale from 450 nm to 950 nm. The catalytic properties of the nanocomposites were studied by using the reduction of 4-nitrophenol (4-NP) by NaBH 4 as a model system. The results showed that the catalytic activity of the polystyrene-supported Ag@AgAu bimetallic nanocomposites was remarkably superior to that of polystyrene-supported monometallic Ag and Au nanocomposites with the same nanoparticle size. In addition, an investigation of the recycling catalytic activity of the PS-Ag@AgAu nanocomposites revealed that the catalyst possessed good stability. The enhancement of the catalytic activity was proposed to be due to the ligand and strain effects between Ag and Au.
研究领域:
材料科学
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催化化学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
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
✓ 已验证
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
·
生物学
·
化学工程
✓ 已验证
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）