JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
·
2017
·Vol. 28
·期 1
·1-8
·
IF 2.325
Wang Shilei,Wu Jie,Yang Hao,Liu Xiangyu,Huang Qiaomu,Lu Zhong
Dental caries is a widespread disease mainly caused by the anaerobic oral pathogen Streptococcus mutans ( S. mutans ). Ag/ZnO nanocomposite is an efficient antibacterial agent because of its high antibacterial activity and low cytotoxicity. In this study, rod-like Ag/ZnO nanocomposite was synthesized through a deposition-precipitation method and characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The activity of Ag/ZnO nanocomposite against S. mutans was evaluated by determining the minimal inhibitory concentration, minimum bactericidal concentration and growth inhibition curve. The results showed that Ag/ZnO nanocomposite displayed higher activity against S. mutans compared with pure ZnO nanorods. Moreover, the antibacterial mechanism was investigated by determining the bacterial membrane potential, release of K + , intracellular reactive oxygen generation and lipid peroxidation. Disruption of membrane function and oxidation of biomacromolecules played important role in the antibacterial action of Ag/ZnO nanocomposite. This work proposes a potentially effective dental antibacterial agent against the dental caries-causing S. mutans .
研究领域:
微生物学
·
材料科学
·
牙医学
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DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 41
·35001-35007
·
IF 3.289
Xuehong Zhang,Min Wei,Bingjing Lv,Yuanjian Liu,Xu Liu,Wei Wei
Glucose and cholesterol in human fluids are clinically important analytes and their sensitive detection is significant in diagnosis. In this study, Au@Ag core–shell nanoparticles (Au@Ag NPs) prepared by in situ growth of silver nanoparticles (AgNPs) on the surface of thiol-PEG-capped gold nanoparticles (AuNPs, 13 nm) have been successfully applied to fabricate a colorimetric biosensing platform for glucose and cholesterol. Au@Ag NPs showed an obvious absorbance peak at 375 nm due to the surface plasmon resonance (SPR) absorption of AgNPs. In the presence of cholesterol and glucose, H2O2 was produced under the catalytic action of their corresponding enzymes such as glucose oxidase (GOx) or cholesterol oxidase (ChOx), which etched the AgNPs shell of Au@Ag NPs. As a result, their characteristic absorbance at 375 nm decreased, accompanied with a perceptible color change from orange to red, which could be used to detect glucose and cholesterol by the naked eye. Under optimum conditions, the linear ranges for the detection of glucose and cholesterol by UV-vis spectroscopy were from 0.5 to 400 μM and 0.3 to 300 μM, respectively. The detection limit of the biosensors for glucose and cholesterol were 0.24 μM and 0.15 μM, respectively. The practical applications of this method in urine or human serum have been realized with satisfactory results. This work provides a simple and sensitive approach for glucose and cholesterol detection, which has broad application prospects in clinical diagnosis.
研究领域:
生物医学
·
纳米技术
·
临床诊断
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Taoyun Zhou,Yun Cheng,Shilin Li,Yi Liu,Xinyu Li
Photoelectrochemical (PEC) water splitting offers a sustainable pathway for hydrogen production, however, the practical application of bismuth vanadate (BiVO 4 ) photoanodes is severely limited by inefficient charge separation and sluggish surface reaction kinetics.To address these challenges, this work aims to develop a simple, scalable, and interface-engineered strategy to enhance the PEC activity of BiVO 4 photoanodes. Herein, Ag-modified BiVO 4 photoanodes were prepared via a scalable two-step electrodeposition followed by photodeposition process, enabling controllable Ag loading and robust interfacial contact. The introduction of Ag nanoparticles not only enhances visible-light absorption through plasmonic effects, but also promotes charge separation by acting as effective electron sinks at the BiVO 4 /Ag interface. As a result, the optimized BiVO 4 /Ag-2 electrode delivers a photocurrent density of 1.24 mA·cm -2 at 1.23 V vs. RHE, which is 2.6 times higher than that of pristine BiVO 4 , along with a surface charge injection efficiency of 35.9%. Moreover, the electrode retains 80.3% of its initial photocurrent after 3 h of continuous operation without sacrificial agents, demonstrating improved operational stability. These findings highlight the synergistic effects of scalable fabrication, controlled Ag decoration, and plasmon-assisted charge transfer regulation, providing a practical and manufacturable design strategy for advancing BiVO 4 -based photoanodes toward efficient solar-driven water splitting.
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产品关联
DOI
高影响因子
Nanoscale
·
2026
·
IF 5.1
Qi Chen,Yanming Li,Hui Shi,Wenbin Ma,Chunzhen Yang,Changli Li,Jingfu He
Multi-carbon (C2+ ) products from electrocatalytic CO2 reduction (CO2 RR) hold significant industrial value. Tandem Cu-based catalytic systems can markedly improve C2+ selectivity, but their performance is often limited by suboptimal spatial configurations. In this study, we fabricate layer-stacked Ag/CuO and array-patterned Ag/CuO catalysts with tunable array spacings (200, 400, and 800 μm) to decouple CO generation and consumption, thereby enabling precise regulation of * CO flux. The array-patterned Ag/CuO systems markedly outperform layer-stacked designs, indicating that lateral CO diffusion is more effective than longitudinal diffusion.Moreover, C 2+ selectivity strongly depends on array spacing, with the best performance achieved at 400 μm (Ag-CuO-400), reaching a Faradaic efficiency (FE) of 63% for ethylene at 300 mA/cm 2 in a neutral electrolyte. Through operando infrared microscopy, we visualize the * CO coverage distribution in real time, revealing an effective lateral CO diffusion length of approximately 200 μm. This corresponds to an optimal balance between * CO supply and C-C coupling activity on the Ag-CuO-400 catalyst. This work underscores the significance of anisotropic * CO transport and provides a design strategy for spatially structured tandem catalysts.
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DOI
PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2019
·Vol. 93
·期 2
·291-301
·
IF 1.986
Ji Lijun,Qin Xiang,Zheng Jingjing,Zhou Shu,Xu Tong,Shi Guojun
Ag–Carbon–TiO 2 composite tubes were prepared by using polystyrene/AgNO 3 composite fibers as a sacrifice template and a co-pyrolysis process. The Ag–Carbon–TiO 2 tubes were characterized by SEM, TEM, X-ray diffraction, Raman spectrum, XPS, and UV–vis spectrum. The results showed that the Ag–Carbon–TiO 2 tubes possessed uniform tubular structure with amorphous carbon, graphitic carbon, and Ag nanoparticles (AgNPs) distributing uniformly in TiO 2 . The Ag–Carbon–TiO 2 tubes were confirmed high UV–vis light utilization and photocatalytic degradation efficiency to Rhodamine B due to the carbon doping, the surface plasmon resonance of AgNPs and the tubular structure, and the degradation of Rhodamine B reached 90% in 6 h. Meanwhile, they showed an excellent antibacterial effect on staphylococcus aureus, and the fatality rate of Ag–Carbon–TiO 2 tubes to staphylococcus aureus reached 99.9% in 24 h when its concentration was higher than 4 mg/ml. The co-pyrolysis process could repress the AgNPs to grow to be large particles, which could be a key for the excellent antibacterial property. The research showed a promising strategy for preparing Ag–Carbon–TiO 2 composite tubes by co-pyrolysis of PS composite electrospinning fibers, indicating their potential application in wastewater treatment and antibacterial materials.
研究领域:
材料科学
·
环境科学
·
微生物学
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DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2019
·
IF 1.163
Jing Chen,Qing Luo,Xiao Zhen Ma
Thermally responsive hydrogels have drawn significant research attention recently because of their simple use as smart catalyst. Here we design a series of responsive hydrogels that incorporate graphene oxide (GO)-Ag composites into thermo-responsive N-isopropylacrylamide (NIPAM) at different mass ratios. It was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and UV-visible absorption spectroscopy. Meanwhile, the PNIPAM/GO-Ag hydrogels showed high catalytic activity in the hydrogenation reaction of nitrophenol to aminophenol and acted as a tunable catalyst which the swelling and collapsing could be triggered by small temperature changes around the lower critical solution temperature (LCST) of the hydrogels. The present approach can shed new light on designing of catalytic material like GO-Ag composite responsive hydrogel with promising applications in catalysis.
研究领域:
材料科学
·
纳米技术
·
催化化学
·
高分子化学
·
智能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2015
·
IF 3.368
Shutao Gao,Tao Feng,Cheng Feng,Ningzhao Shang,Chun Wang
In this paper, a novel visible-light responsive photocatalyst of Ag/AgCl@MIL-101 was synthesized via vapor diffusion-photoreduction strategy. The as-prepared composite material was characterized using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, transmission electron microscopy, ultraviolet–visible diffuse reflection spectra and X-ray photoelectron spectroscopy. Due to the synergistic effect between Ag/AgCl and MIL-101, the composite photocatalyst exhibited an enhanced and stable photoactivity for the degradation of Rhodamine B under visible light irradiation. The relationship between the photocatalytic activity and the structure of Ag/AgCl@MIL-101 hybrid material was discussed and the possible reaction mechanism was proposed.
研究领域:
材料化学
·
环境催化
·
纳米材料
·
光催化
·
多孔框架材料
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Zhenting Zhao,Yueyun Huang,Qiuguo Li,Haijuan Mei,Fanglong Zhu,Weiping Gong
We demonstrate the fabrication of Co 3 O 4 (derived from zeolitic imidazolate framework-67) wrapped Ag nanowires core-shell nanostructures, and support it on graphene matrix (Co 3 O 4 @Ag NWs-GR) to prepare enzymeless glucose sensor. The core-shell Co 3 O 4 @Ag nanowires possess porous surface and the proposed Co 3 O 4 @Ag NWs-GR nanocomposites exhibit hierarchical structure which could help to improve the performance of enzyme-free glucose detection. For practical application, the as-prepared Co 3 O 4 @Ag NWs-GR nanocomposites were sandwiched by nickel foam (NF) to develop a glucose detection electrode, which demonstrates good reproducibility and glucose specific selectivity. Then, the Co 3 O 4 @Ag NWs-GR/NF electrode was integrated with Pt wire, Ag/AgCl wire and polydimethylsiloxane (PDMS) to fabricate a sensitive device. The amperometric response of the as-developed device suggests that the Co 3 O 4 @Ag NWs-GR/NF based sensor presents a high sensitivity of 2.49 μA/μM/cm 2 in the linear interval of 3–2000 μM, a detection limit of 0.98 μM, as well as an outstanding long-term stability. Additionally, the human serum was used to verify that the Co 3 O 4 @Ag NWs-GR based glucose sensor can detect the glucose level in serum, suggesting it is applicable to the enzymeless glucose determination.
研究领域:
生物医学工程
·
纳米医学
·
电化学传感
·
糖尿病监测
·
转化医学
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DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 11
·4847-4854
·
IF 5.968
Desong Wang,Yandong Duan,Qingzhi Luo,Xueyan Li,Jing An,Leilei Bao,Lei Shi
A new method for the preparation of mesoporous TiO2 with a surface deposited with nanoparticles of Ag and AgBr was developed. Cetyltrimethylammonium bromide (CTAB) was used as both a template agent and bromine source in the preparation process of the mesoporous TiO2. Mesoporous TiO2 containing CTAB was synthesized by a sol–gel method, and was dipped into AgNO3 solution to form a mesoporous AgBr/TiO2 nanocomposite. The AgBr/TiO2 nanocomposite was irradiated by visible light to accelerate photolysis of AgBr, forming mesoporous Ag/AgBr/TiO2 photocatalyst. The Ag/AgBr/TiO2 photocatalyst was characterized by small angle X-ray diffraction (SAXRD), wide angle X-ray diffraction (WAXRD), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES) and N2 isothermal adsorption–desorption. Ag/AgBr/TiO2 exhibits high photocatalytic activity for the degradation of methyl orange under visible light irradiation. The photocatalytic reaction follows the first-order kinetics and the rate constant (k) for the degradation of methyl orange photocatalyzed by Ag/AgBr/TiO2 is 63.6, 36.1 and 2.7 times that of mesoporous TiO2 (M-TiO2), commercial TiO2 (P-25), and Ag/AgBr/SiO2, respectively. The recycling runs experiment shows that the photocatalytic stability of the Ag/AgBr/TiO2 photocatalyst is excellent. The visible light photocatalytic mechanism of Ag/AgBr/TiO2 is also discussed.
研究领域:
材料科学
·
光催化化学
·
纳米材料
·
环境功能材料
·
表面科学
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DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Yaning Liu,Tianqi Yang,Ruyi Fang,Chengwei Lu,Ruojian Ma,Ke Yue,Zhen Xiao,Xiaozheng Zhou,Wenkui Zhang,Xinping He,Yongping Gan,Jun Zhang,Xinhui Xia,Hui Huang,Xinyong Tao,Yang Xia
The unstable electrolyte/lithium (Li) anode interface has been one of the key challenges in realizing high energy density solid-state lithium metal batteries (LMBs) applications. Herein, a dense and uniform silver (Ag) nano interlayer with a thickness of ∼35 nm is designed accurately by magnetron sputtering technology to optimize the electrolyte/Li anode interface. This Ag nano layer reacts with Li metal anode to in-situ form Li-Ag alloy, thus enhancing the physical interfacial contact, and further improving the interfacial wettability and compatibility. In particular, the Li-Ag alloy is inclined to form AgLi phase proved by cryo-TEM and DFT, effectively preventing SN from continuously “attacking” the Li metal anode due to the lower adsorption of succinonitrile (SN) molecules on AgLi than that of pure Li metal, thereby significantly reinforcing the interfacial stability. Hence, the enhanced physical and chemical stability of electrolyte/Li anode interface promotes the homogeneous deposition of Li + and inhibits the dendrite growth. The Li-symmetric cell maintains stable operation for up to 1700 h and the cycling stability of LiFePO 4 |SPE|Li full cell is remarkably improved at room temperature (capacity retention rate of 91.9% for 200 cycles). This work opens an effective way for accurate and controllable interface design of long lifespan solid-state LMBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米科技
·
固体离子学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 79
·75855-75861
·
IF 3.289
Qixuan Song,Hui Wang,Baoshan Yang,Fei Wang,Xinrong Sun
A novel silver nanoparticle-modified magnetic multi-walled carbon nanotube composite (Ag-FMWCNTs) was synthesized by embedding Fe3O4 and assembling Ag nanoparticles in one-step. The properties of the Ag-FMWCNTs composites and magnetic multi-walled carbon nanotubes (FMWCNTs) were studied by scanning electron microscopy, vibrating sample magnetometry (VSM) and Fourier transform infrared spectroscopy. The adsorption isotherms, adsorption kinetics and the effects of solution pH and ionic strength to adsorb emerging contaminant sulfamethoxazole (SMX) from aqueous solution on different multi-walled carbon nanotubes-based adsorbents were determined. The results showed that the adsorption kinetics could be explained well by means of the pseudo-second-order and intraparticle diffusion models. The pH experiments showed that maximum adsorption occurred at pH 4. Additionally, all adsorbents had a strong adsorption ability to SMX and the Langmuir maximum capacity followed the order: 5% Ag-FMWCNTs (118.58 mg g−1) > 3% Ag-FMWCNTs (86.41 mg g−1) > MWCNTs (73.69 mg g−1) > 1% Ag-FMWCNTs (70.26 mg g−1) > FMWCNTs (45.13 mg g−1). The spent adsorbents were regenerated in methanol. It was also found that after regenerating four times, multi-walled carbon composites retained up to 80% of their original adsorption performance. Therefore, the Ag-FMWCNTs composite could be used as a potential adsorbent for removing sulfamethoxazole from water.
研究领域:
环境科学
·
纳米技术
·
水污染控制
·
吸附材料
·
药物残留治理
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Junnan Liu,Qiuyang Luo,Shu Xia,Xingfu Yang,Jie Lei,Qi Sun,Xiaohu Chen,Jiaojing Shao,Xiaoning Tang,Guangmin Zhou
Structuring a stable artificial coating to mitigate dendrite growth and side reactions is an effective strategy for protecting the Zn metal anode. Herein, a Cu-Ag double-layer metal coating is constructed on the Zn anode (Zn@Cu-Ag) by simple and in-situ displacement reactions. The Cu layer enhances the bond between the Ag layer and Zn substrate by acting as an intermediary, preventing the Ag coating from detachment. Concurrently, the Ag layer serves to improve the corrosion resistance of Cu metal. During plating, the initial Cu sheets and Ag particles on the surface of Zn@Cu-Ag electrode gradually transform into a flat and smooth layer, resulting in the formation of AgZn, AgZn 3 , and (Ag, Cu)Zn 4 alloys. Alloys play a multifunctional role in inhibiting dendrite growth and side reactions due to decreased resistance, low nucleation barrier, enhanced zincophilicity, and strong corrosion resistance. Consequently, the Zn@Cu-Ag symmetric cell exhibits continuous stable performance for 3750 h at 1 mA cm −2 . Furthermore, the Zn@Cu-Ag||Zn 3 V 3 O 8 full cell achieves an initial capacity of 293.4 mAh g −1 and realizes long cycling stability over 1200 cycles. This work provides new insight into the engineering of an efficient artificial interface for highly stable and reversible Zn metal anodes.
研究领域:
材料科学
·
电化学
·
储能
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DOI
高影响因子
危险品化学品经营许可证（带存储）