Materials Today Communications
·
2025
·
IF 4.5
Nanqing Zhang,Xianhua Bian,Zhenglong Zhu,Xin Huang,Ping-an Yang
To effectively absorb electromagnetic waves and reduce the impact of electromagnetic radiation on the health of residents and the normal operation of electronic devices, core-shell nanocomposite fibers (Fe NWs@SiO 2 @Ag) were successfully prepared by the liquid-phase hydrolysis method. The microwave absorption properties of core-shell nanocomposite nanofibers with different ratios were tested and analyzed using the coaxial method. The results show that the sample with a molar ratio of Fe:SiO 2 :Ag of 1:0.1:1 has the best comprehensive performance. This sample exhibits excellent microwave absorbing performance. When the mass filling fraction is 25 wt%, its minimum reflection loss (RL min ) can reach −61.55 dB, and the effective absorption bandwidth (EAB) can reach 3.52 GHz. The excellent microwave absorbing performance can be attributed to the interfacial polarization effect of the core-shell nanocomposite structure, the magnetic loss and conduction loss of each layer of materials, and the small-scale effect caused by the one-dimensional structure. This study can provide a methodological reference for the preparation of high-performance absorbing materials.
研究领域:
材料科学
·
纳米技术
·
电磁学
·
微波工程
✓ 已验证
产品关联
DOI
高影响因子
Food Analytical Methods
·
2024
·Vol. 17
·期 4
·585-593
·
IF 2.6
Wang Haoyu,Zhang Li,Chen Chen,Waterhouse Geoffrey I. N.,Sun Yufeng,Xu Zhixiang
In this study, a sensitive surface-enhanced Raman scattering (SERS) sensor based on core–shell-structured Au@Ag nanoparticles (NPs) was successfully developed for the detection of acrylamide (AA) in foods. Coating Au NPs with a shell of silver gave the Au@Ag NPs outstanding SERS performance for AA detection. Under the optimal experimental conditions, a good linear relationship was established SERS intensity at 1272 cm −1 and the logarithm of the AA concentration (over the concentration range 10 −8 ‒10 −3 mol L −1 ). The limit of detection (LOD) of the SERS method was 1.27 × 10 −9 mol L −1 . The recoveries of AA in spiked cookie samples were in the range of 85.68–102.50%. In addition, the SERS sensor was used to determine the content of AA in three food samples (potato chips, fried dough twist, and instant coffee), with the results obtained being consistent with those determined by high-performance liquid chromatography (HPLC), demonstrating that the SERS sensor was suitable for the detection of AA in real food samples.
研究领域:
分析化学
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纳米技术
·
食品科学
·
光谱学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Jiajie Yu,Dongping Sun,Tianhe Wang,Feng Li
Conventional ZnO powder catalysts possess excellent stability and photocatalytic activity, but have great difficulties for separation and regeneration after the reaction and require ultraviolet irradiation (less than 5% of solar energy), thus restricting practical applications. In this paper, unique short submicron wire-like ZnO films were successfully prepared on silicate glass substrates by calcination of spin-coated zinc acetate solution in the presence of ethanolamine (EA). A typical synthesis yields ZnO submicron wires with ca. 50–120 nm in diameter, 15–30 μm in length and 0.5–1.5 μm in height. Ag@AgCl particles were deposited on short ZnO submicron wire films by a simple impregnating-precipitation-photoreduction method. The as-prepared Ag@AgCl/ZnO film exhibited efficient photocatalytic performance under visible light irradiation and excellent self-cleaning capability under solar light. This film photocatalysts were easy to separate from the reaction, and the tests showed that the films were reusable for four times without significantly loosing efficiency. Additionally, gas chromatography–mass spectroscopy (GC–MS) was applied to investigate the degraded chemical species resulted from the photo-catalytic degradation of methylene blue (MB) and methyl orange (MO) dyes under Ag@AgCl/ZnO. A possible photocatalytic mechanism was proposed based on the photoelectrochemical measurements and radical trapping experiments.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Xiangyang Chen,Zhensen Liang,Aodi Hu,Minggang Zhao
L-Cysteine (L-Cys), a sulfur-containing amino acid, plays a crucial role in various biological processes. Rapid and accurate detection of L-Cys in the human body is significant for clinical diagnosis and drug analysis. However, classic electrochemical sensing mechanisms are usually based on redox reactions, and substances with similar redox properties in the serum can easily interfere with the detection process. In this study, we present a novel approach for the detection of L-Cys using Schottky barriers of Ni/Cu2O/Ag nanocubes. The electrode exhibits excellent selectivity towards L-Cys due to the specific interaction between Cu2O and L-Cys through the formation of Cu–S bonds. The Schottky barrier at the Cu2O/Ag interface, formed due to the difference in work functions, impedes electron transfer and can be modulated by the adsorption of charged L-Cys molecules. The introduction of light irradiation enhances the barrier modulation capability, resulting in improved sensitivity. Experimental results demonstrate that the Ni/Cu2O/Ag electrode exhibits a linear response to L-Cys concentration within 0–2400 nM at pH 3.0 and pH 7.0, with a low detection limit of 11.86 nM. The electrode shows excellent performance in real sample analysis, exhibiting high recovery rates and low relative standard deviations. The light-assisted barrier enhancement mechanism provides a new avenue for the development of highly selective and sensitive electrochemical sensors.
研究领域:
电化学传感
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纳米材料
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生物传感器
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分析化学
·
表面科学
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Wei Zhang,Min Chen,Xinjian Cheng,Jie Yang,Jumei Li
In this study, we demonstrated an efficient solar photocatalyst, g-C 3 N 4 modified hollow Ag/ZrO 2 core–shell composites (Ag/hZrO 2 /CN) using polymethylacrylic acid (PMAA) nanospheres as sacrificial template. The optimized Ag/hZrO 2 /CN catalyst demonstrated substantial photocatalytic performance, achieving 97.6 % degradation of methylene blue (MB) and 99.5 % degradation of thiram (TRM) within 90 min under simulated sunlight using a 500 W Xe lamp. The improved property is likely attributed to the synergistic effect among three constituents and the effective segregation of photogenerated electron-hole pairs in ZrO 2 , g-C 3 N 4 and Ag NPs, as confirmed by photocurrent and EIS analysis. Based on free radical scavenging studies (e − , h + , OH and O 2 − ), the mechanism underlying the boosted photocatalytic activity was suggested. Moreover, Ag/hZrO 2 /CN presented excellent surface enhanced Raman scattering activity, achieving quantitative sensing of MB and TRM with limits of detection of 5 × 10 −8 and 10 −6 mol/L, respectively, and a favorable linear correlation between SERS intensities and logarithmic concentration (R 2 ≥ 0.97). Additionally, Ag/hZrO 2 /CN accomplished recyclable SERS detection of MB and TRM through stimulated sunlight irradiation, which is significant for the recyclable SERS detecting through fast sunlight-powered procedure.
研究领域:
材料科学
·
环境科学
·
分析化学
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产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2015
·Vol. 17
·期 10
·6819-6826
·
IF 4.493
Yanting Liu,Jun Zhou,Binbing Wang,Tao Jiang,Ho-Pui Ho,Lucia Petti,Pasquale Mormile
Novel Au@Ag core–shell nanocubes (NCs) were successfully prepared by the controlled epitaxial growth of Ag shells onto Au nanoellipsoids (NEs) in the presence of surfactants. The growth mechanism of the Au@Ag core–shell NCs was systematically investigated by analyzing their morphology, optical properties, and crystallography. The localized surface plasmon resonance (LSPR) characteristics and the electric field distribution of the Au@Ag core–shell NCs were studied using the finite element method (FEM) based on the plasmon hybridization theory. Compared with pure Ag NCs, the absorption spectrum of the Au@Ag core–shell NCs exhibits a red shift and a weak shoulder near 550 nm, and the notable enhancement of electric field occurs around the corners along the long-axis of the Au ellipsoidal core because of plasmonic resonant coupling. Surface-enhanced Raman scattering (SERS) of the Au@Ag core–shell NCs labeled with 4-mercaptobenzoic acid molecules reveals that the bimetallic core–shell NCs possess efficient SERS activity with an enhancement factor EF = 2.27 × 106, thus confirming the possibility of using the Au@Ag core–shell NCs as a stable probe for SERS-based biosensing applications.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Yuan Jing,Fandi Meng,Fuhui Wang,Li Liu
Slippery liquid-infused porous surface (SLIPS) has garnered significant attention in marine anticorrosion and antifouling applications due to their slippery attributes. Nevertheless, it remains challenging to fulfill the protection requirements by relying exclusively on the barrier and anti-adhesion mechanisms of surface lubricating layer. In this work, a dual-functional slippery organogel coating was meticulously synthesized by introducing Ag(Ӏ)-imine coordination bonds into organosilicon networks, thereby endowing the coating with self-healing and antibacterial properties. A surface scratch with a width of 50 μm can be effectively repaired within 6 h at 60 °C, and the repair efficiency exceeds 85 %. In addition, the coating exhibits a dual antibacterial mechanism, which functions through both sterilization via the release of Ag + and antiadhesion due to its slippery properties. Following a 7-day cocultivation period with PAO1 bacteria, the coating retained 100 % bactericidal activity and 99.8 % resistance to bacterial adhesion. Moreover, the antialgal efficacy of the AP-TA 0.2 -Ag 1 @Oil coating against Chlorella and P. tricornutum increased by 99.9 % and 99.7 %, respectively. Furthermore, the combination of Ag(Ӏ)-imine coordination bonds and silicone oil effectively preserves the corrosion resistance of the coating. The EIS results demonstrated that the | Z | 0.01 Hz value of the slippery organogel coating was maintained at 1.07 × 10 7 Ω·cm 2 after immersion in 3.5 wt% NaCl solution for 14 days, suggesting excellent anticorrosion performance of the coating. This study provides a novel perspective for the development of marine protective coatings that possess antifouling, self-healing, and anticorrosive properties.
研究领域:
材料科学
·
海洋防护
·
高分子化学
·
表面工程
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腐蚀科学
·
生物材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 6
·1-11
·
IF 2.8
Ji Xiaohong,Ji Wenhui,Pourhashem Sepideh,Wang Wei,Duan Jizhou,Hou Baorong
Core-shell nanofibers consisted of chitosan/polyvinyl alcohol as shell and TiO 2 /Ag nanoparticles as core (abbreviated as (TiO 2 @AgNPs)@(CS/PVA)) are synthesized by electrospinning method for improving the functional properties of the epoxy polymer coatings. The agglomeration of the core-shell network is prevented through fabrication on carbon steel surface. Meanwhile, the presence of unique amine and hydroxyl functional groups on the surface of the CS/PVA nanofibers would provide a crosslinking with the epoxy resin molecules with merits of reducing the gaps between epoxy coating and fillers and enhancing the blocking effect of the fibers. The electrochemical impedance spectroscopy reveals that the resistance of the epoxy coating loaded with the core-shell nanofibers is almost 3 times more than that of the blank sample during 30 days of soaking in the 3.5 wt% NaCl electrolyte. Moreover, the (TiO 2 @AgNPs)@(CS/PVA)/epoxy coating has shown high antibacterial activity against S. aureus with the highest antibacterial rate of 87% after 24 h storage in the solution of phosphate buffer salt. The developed core-shell nanofibers embedded within epoxy coating with enhanced anticorrosion and antibacterial properties could provide a promising application in various maritime fields for achieving both anticorrosion and antifouling properties in one coating system.
研究领域:
材料科学
·
化学工程
·
生物学
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Junlong Zhang,Jie Wei,Long Yang,Ao Cao,Zehao Sun,Youxin Yuanfeng,Xuyu Shen,Bing Chen,Guogang Chen
With the rapid advancement of modern industry and population growth, unrestrained discharge of industrial effluent and domestic sewage has caused severe environmental pollution, which poses a severe challenge to human habitat. Owing to the unique eco-friendly characteristics, photocatalytic technology has emerged as a highly promising approach in the wastewater treatment very recently. Z-scheme heterojunction ternary photocatalysts of “ x · AgCl/ y · CoWO₄/Ag” were ingeniously designed and developed in this study, exhibiting exceptionally high photocatalytic activity for degrading micropollutants in wastewater compared with single-component photocatalysts. For instance, photocatalytic activity of AgCl/CoWO₄/Ag (reflected by the reaction kinetic parameter k ) is 7.7 times that of AgCl and 313 times that of CoWO₄, respectively. The experimental results and analysis revealed a typical Z-scheme charge transfer mechanism in these ternary photocatalyst heterojunctions, thereby confirming the structural characteristics of Z-scheme heterojunction. Furthermore, the ternary photocatalysts retained the reaction activity with virtually no change after undergoing five cycles of catalytic experiments, highlighting its excellent stability. Consequently, an underlying mechanism was proposed herein to account for the enhanced photocatalytic properties. It is believed that such ternary Z-scheme heterojunction materials expand halide-based heterojunction construction methods and promise significant implications for environmental remediation.
研究领域:
环境科学
·
材料化学
·
光催化化学
·
纳米材料
·
污染治理
·
能源与环境技术
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 8
·1-9
·
IF 6.232
Wei Yu-ping,Zhang Yi-wen,Chen Jing-Shuai,Mao Chang-jie,Jin Bao-Kang
An ultrasensitive electrochemiluminescence biosensor was established based on the Zn-MOF/GO nanocomposite. Ag(I)-embedded DNA complexes were used as a signal amplification reagent. In this work, 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin (TCPP) and Zn 2+ were integrated into a porphyrin paddlewheel framework (Zn-MOF) by a hydrothermal method. The synthesized Zn-MOF material has electrochemiluminescence property, and the luminescence intensity is improved after being composited with graphene oxide (GO). Based on the composite material, we constructed an ultrasensitive ECL biosensor for the p53 antibody detection. The composite material acted as an admirable substrate and then loaded plenty of p53 antigens to recognize the target (p53 antibody) accurately. Because of the bridging effect of streptavidin and biotin-conjugated goat anti-rabbit IgG (bio-ab2), the rich-C DNA with positive correlation with the target was modified on the electrode and then captured the co-reactant accelerator Ag + to amplify the signal. Therefore, the ECL biosensor response increases with increasing p53 antibody concentration. In the range 0.1 fg/mL–0.01 ng/mL, the response signal of the biosensor has a good linear relationship with the p53 antibody concentration. The detection limit is 0.03 fg/mL (S/ N = 3). Impressively, the biosensor not only featured high sensitivity, good stability, and excellent specificity for the detection of p53 antibody, but also provides a new way for early detection of cancer.
Schematic representation of the electrochemiluminescence sensor based on a Zn-MOF/GO nanocomposite, which can be applied to the determination of p53 antibody.
研究领域:
分析化学
·
生物化学
·
纳米技术
·
癌症研究
✓ 已验证
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Jingying Yang,Mingfei Pan,Xiao Yang,Kaixin Liu,Yang Song,Shuo Wang
In-situ, real-time and sensitive detection of multiple pesticide residues in food is always an important issue in food safety. Herein, a novel multifunctional bead-string like Ag nanowires@zeolitic imidazolate framework-8 (Ag NW@ZIF-8) core–shell nanochains was successfully synthesized and utilized as surface-enhanced Raman scattering (SERS) substrate for in-situ and simultaneous detection of pesticide residues . Due to the microporous framework structure of ZIF-8 shell and the plasmon property of Ag NWs core, the Ag NWs@ZIF-8 composite was demonstrated to have strong adsorption performance and high SERS activity (enhancement factor: 4.6 × 10 7 ). The Ag NWs@ZIF-8 based SERS strategy achieved sensitive detection of two water-insoluble pesticides methylparathion and carbaryl with detection limits as low as 7.6 × 10 −9 M and 5.7 × 10 −9 M, as well as the in-situ detection of multi-pesticide residues on fruits and vegetables with acceptable recovery ranged from 77.4 % to 117.5 %, demonstrating its great potential for in-situ and rapid detection of food contaminants.
研究领域:
食品安全
·
分析化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Qia Zhang,JianXiong Zou,Jin Ai,XiaoTian Pan,DongHong Qiao,Seong Chan Jun,Vijaykumar V. Jadhav,Ling Kang,Chun Huang,Jian Zhang
The current collector serves as a crucial element in supercapacitors, acting as a medium between the electrode material and the substrate. Due to its excellent conductivity, a metal collector is typically favored. Enhancing the binding strength between the collector and the substrate as well as between the collector and the electrode material has emerged as a critical factor for enhancing the capacitance performance. In this study, a Ag film with a grass root-like structure was initially grown on a PI substrate through the surface modification and ion exchange (SMIE) process. This Ag interlocking structure contributes to strong binding between the PI substrate and Ag without compromising the mechanical properties of the Ag film. To further enhance the electrochemical properties at low scan rates, electroless-plated Cu was subsequently deposited on the Ag film to form the Cu/Ag current collector. Moreover, the Cu within the Cu/Ag current collector served as a precursor for the growth of FeOOH–Cu(OH)2 via a two-step in situ method. The resulting FeOOH–Cu(OH)2/Cu/Ag structure as a whole is binder-free. Supercapacitors employing symmetric FeOOH–Cu(OH)2/Cu/Ag structures were assembled, and their energy storage properties were investigated. The solution-based low-temperature process used in this study offers the potential for cost-effective and large-scale applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）