FOOD CHEMISTRY
·
2024
·
IF 8.5
Chen Yin,Xin Ding,Zhihao Lin,Jiayong Cao,Weiye Shi,Jian Wang,Dan Xu,Donghui Xu,Yuan Liu,Guangyang Liu
Fresh strawberries are easily contaminated by microorganisms after picking. Therefore, how to effectively store and keep fresh strawberries has been a hot topic for scientists to study. In this study, we prepared a leaf shaped metal organic framework nanomaterial loaded with quercetin (Quercetin@ZIF-L) at first, which can achieve effective loading of quercetin (96%) within 45 min and has a controlled release effect under acidic conditions. In addition, by cleverly combining satellite graphene oxide @ silver nanoparticles (GO@AgNPs) with slow precipitation performance, Quercetin@ZIF-L/GO@AgNPs nanocomposite film with larger pore size and larger specific surface area was prepared by scraping method. The characterization data of water flux , retention rate, flux recovery rate and water vapor permeability show that the composite film has good physical properties. The experiment of film packaging showed that the fresh life of strawberry could be extended from 3 to 8 days, which significantly improved the storage and freshness cycle of strawberry. At the same time, the metal migration test proved that the residual amount of silver ion in strawberry met the EU standard and zinc ions are beneficial to the health, enriching the types of high-performance fresh-keeping materials and broadening the application.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Li Liu,Tao Chen,Liping Han,Zhuo Qian,Junpeng Li,Guoyou Gan
The Thermal Conductive Silver Adhesive (TCSA) efficiently transfers heat from electronic components to heat dissipation components, preventing overheating and extending device lifespan. Despite the effectiveness of commercial sintered nano TCSA, high production costs necessitate a more affordable, high-performance preparation method. This study presents a strategy for preparing ultra-high thermal conductivity (TC) TCSA using multidimensional thermal conductive fillers and low-temperature sintering of silver nanoparticles (AgNPs). MXene@AgNPs particles are synthesized via in-situ reduction of AgNPs on MXene surfaces. These particles, combined with silver microflakes (AgMFs) as primary fillers and epoxy (EP), undergo low-temperature heat treatment to form the AgMFs-MXene@AgNPs/EP composite. Characterization and computational models show that filler-filler interface thermal resistance (ITR f-f ) is critical for TC. Adding MXene alone is insufficient, but using MXene@AgNPs particles as secondary fillers allows AgNPs to interconnect fillers, effectively reducing the ITR f-f . The resulting composite achieves an ultra-high TC of 65.51 Wm −1 K −1 with 63 wt% total filler content (60 wt% AgMFs, 3 wt% MXene@AgNPs). This study advances the development of low-cost, high-performance TCSA for thermal management applications.
研究领域:
材料科学
·
热传导工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 40
·18845-18853
·
IF 6.97
Qi Wang,Chunyan Wang,Xiaodong Wang,Yuan Zhang,Yuehuan Wu,Chuan Dong,Shaomin Shuang
A multifunctional nanosensor of CPs@MnO2–AgNPs was constructed for sensitive and selective sensing of GSH and cancer theranostics in this work. The CPs@MnO2 nanocomposite was synthesized by capping MnO2 onto carbon nanoparticles through an in situ redox reaction under ultrasonication. AgNPs with fluorescence were obtained through a silver-mirror-like reaction using BSA as both a template and reductant and further anchored onto the surface of CPs@MnO2 through electrostatic interaction to construct the CPs@MnO2–AgNP nanocomposite. The fluorescence of AgNPs was effectively quenched by MnO2 through an inner filter effect and a static quenching effect and further recovered by GSH owing to the unique redox reaction between GSH and MnO2. Therefore, a novel fluorescent turn-on nanosensor was established for GSH sensing in vitro and in vivo. For GSH sensing, a satisfactory linear range of 0.8–80 μM with a detection limit of 0.55 μM was obtained under optimal conditions. Moreover, by integrating the GSH-responsive fluorescence imaging capacity, the photothermal activity of carbon nanoparticles and the anticancer effect of AgNPs, the CPs@MnO2–AgNP nanocomposite was successfully applied for cancer theranostics. The fluorescence recognition of cancer was achieved by overexpressing GSH in cancer, meanwhile the photothermal therapy from CPs and chemotherapy from AgNPs jointly produced an enhanced therapeutic effect. This redox-responsive nanocomposite of CPs@MnO2–AgNPs improves the MnO2 nanomaterial-based applications in GSH sensing and cancer theranostics.
研究领域:
生物医学工程
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纳米医学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 67
·54182-54187
·
IF 3.84
Zhiqiang Cheng,Fanli Zhang,Wei Liu,Liying Cui,Lijuan Kang
In this paper, we have prepared an antibacterial material of PVA/L-histidine (L-H)/Ag fibers by electrospinning in a double nozzle for the first time. The composite fibers were crosslinked by the mixture of glutaraldehyde and hydrogen chloride gas. After that, the fibers were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS) and FT-IR spectra. The results indicated the size of silver particles distributed on the fiber was in the nanoscale below 10 nm, and OH groups have significantly decreased but the CO groups increased after crosslinking treatment by the gas phase. Simultaneously, the mechanical property for the membrane also greatly improved and the maximum strain and toughness reached 225.01% and 11.31 J g−1 respectively. Lastly, in order to investigate the antibacterial property of the membrane, we chose E. coli and Staphylococcus as inhibition targets, which showed the excellent antibacterial property for blocking the growth and destroying the structure of the bacteria.
研究领域:
材料科学
·
生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2024
·
IF 2.2
Fang-Zhong Zhang,Yan Zeng,Mu-Yue Zheng,Hao Zheng,Meng Fang,Bao-Xuan Xie,Rong-Guang Lin
Ag NPs were generated by reducing silver ions with sodium borohydride and then loaded into a zirconium-based MOF, PCN-222, resulting in a deep purple powder, PCN-222@AgNPs, which exhibited photocatalytic activity. The material was characterized and found to have Ag NPs uniformly dispersed in the pores of PCN-222, with a content of 6.0306%. PCN-222@AgNPs had rod-shaped structures of micrometer sizes with irregular spherical Ag NPs on their surfaces, as revealed by scanning electron microscopy and transmission electron microscopy. In experiments on Ag NPs release and reactive oxygen species (ROS) detection, PCN-222@AgNPs effectively released Ag NPs into an aqueous solution and promote ROS generation. Finally, the antibacterial activities of PCN-222@AgNPs against Escherichia coli and Staphylococcus aureus were assessed by in vitro experiments. Results indicated that PCN-222@AgNPs had lower minimum bactericidal concentration (MBC) compared to PCN-222 in both light and dark environments. The MBC further decreased under light conditions due to the enhanced photocatalytic performance of the composite material and the promotion of Ag NPs release by ROS. These findings demonstrate that PCN-222@AgNPs have synergistic antibacterial effects under visible light irradiation.
研究领域:
材料科学
·
微生物学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2023
·Vol. 11
·期 6
·2201284
·
IF 3.8
Lianjie Li,Ke Zeng,Zhen He,Jianqiang Xue,Xuan Liu,Anmin Liu,Liguo Gao,Tingli Ma
The solar-driven interfacial evaporation system has attracted much attention in recent years because it avoids dissipating a large amount of energy into the bulk water. As one of the photothermal materials in solar-driven interfacial evaporation system, wood has been widely applied due to its excellent properties, such as lower density, open micropores, capillary-induced hydrophilic nature, and low thermal conductivity. However, the complex processing technology and relatively low efficiency of wood-based photothermal materials limit their application. Herein, to solve these problems, solvothermal and immersion treatment methods by depositing tin sulfide and silver nanoparticles (AgNPs) have been demonstrated. The solar absorption rate of wood-SnS-AgNPs is higher than 98% in a wide wavelength range (200–2,500 nm). Results demonstrate that an evaporation rate of 1.53 kg m −2 h −1 and evaporation efficiency (90.12%) are achieved under 1-sun illumination (100 mW cm −2 ). The harsh environmental test indicates that the solar-driven interfacial evaporation system based on wood-SnS-AgNPs has excellent structural stability and purification ability of seawater.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Optical Materials Express
·
2020
·Vol. 10
·期 12
·3393-3402
·
IF 3.064
Wang Zhengkun,Sun Ning,Zhu Yong,Zhang Jie
An ultra-sensitive SERS (surface-enhanced Raman scattering) substrate was fabricated orderly by depositing 360 nm Ag film on the surface of V-shaped AAO (anodized aluminum oxide), utilizing NaOH solution to remove the AAO template, the neat volcano-like Ag arrays substrate (N-V-Ag) was obtained, and then depositing 1.5, 6 and 10 nm Ag film on the surface of the N-V-Ag to obtain the AgNPs decorated volcano-like Ag arrays substrates (AgNPs-V-Ag-1.5, AgNPs-V-Ag-6 and AgNPs-V-Ag-10, respectively). Experimental results indicated that the cavity resonance mode (super-radiant bright modes) and the rim mode as well as “NP mode” (subradiant dark mode) have strong interferences, which results in a significant change in the distribution of the hot spots in the cavity compared with the N-V-Ag. The analytical enhancement factor (AEF) of AgNPs-V-Ag could reach up to 1.5 × 1011, improved by 5 orders of magnitude compared with the N-V-Ag. This novel substrate could obtain extremely low limits of detection (LOD) of 10−13 mol/L (-13 M) for Rhodamine 6G (R6G).
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2022
·
IF 7.425
Yaodi Zhu,Weijia Liu,Shijie Liu,Miaoyun Li,Lijun Zhao,Lina Xu,Na Wang,Gaiming Zhao,Qiuying Yu
In this study, we developed a novel and sensitive AgNPs self-assembled solid-phase (AgNPs-SASP) SERS substrate platform using seed-mediated and liquid interface self-assembly methods and applied the platform for the detection of three bacterial spores. Multivariate statistical analysis (HCA and LDA) were employed for identification and categorization of the obtained data. The results illustrated that AgNPs-SASP exhibited high reproducibility and Raman enhancement effect (1.43 × 10 4 ). The Raman shift bands of the three bacterial spores ranged from 400 to 1800 cm −1 demonstrating the difference in reigon and intensity. And the intensities of their Ca 2+ -DPA Raman bands are significantly different. HCA results revealed that the spectra for the three bacterial spores were statistically different while LDA completely differentiated the spectra for the three bacterial spores with 100 % sensitivity and specificity. Overall, the novel SERS platform based on AgNPs-SASP provides an effective tool for food safety risk control and detection.
研究领域:
食品科学
·
分析化学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yuting Guan,Siyu Wang,Guanghua Lei,Zikang Hu,Hengye Chen,Huiwen Gu,Xiaoli Yin,Yuanbin She,Wanjun Long,Haiyan Fu
Enshi Yulu green tea (ESYL) is the most representative traditional steamed green tea in Enshi, Hubei. Different ESYL grades exhibit distinct flavors, tastes, and prices. In this study, a visual sensor based on 4-MPBA Au@AgNPs was developed for the rapid and accurate identification of ESYL grades. The recognition mechanism involved the binding of 4-MPBA Au@AgNPs with polyphenolic compounds in ESYL to form borate esters and the conversion of Ag + to Ag 0 , with the generated Ag 0 depositing on the surface of 4-MPBA Au@AgNPs. The results showed that the sensor can amplify the color differences of different grades of ESYL. The visual results were also validated by the partial least squares discriminant analysis model, demonstrating an enhancement in recognition accuracy from 68.2 % to 95.5 % compared to the original extraction solution. The colorimetric sensor developed in this study is expected to provide a new approach for traceability research of other foods.
研究领域:
食品科学
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Bo Yu,Fanming Meng,Muhammad Wasim Khan,Rui Qin,Xingbin Liu
Herein, TiO 2 /g-C 3 N 4 /Ag (TCA) composites were successfully fabricated by a simple two-step method and wet chemical reduction. Titanium isopropoxide and melamine were used as precursors to prepare TiO 2 /g-C 3 N 4 heterojunction composites by simple stirring and calcining. Then, different mass fractions of AgNPs were decorated on the surface of the above composites by wet chemical reduction to obtain a sequence of TiO 2 /g-C 3 N 4 /Ag (TCA) composites. TCA composites were analyzed by XRD, TEM, HRTEM, EDS, XPS, BET, Raman spectroscopy, PL spectrum and UV–vis diffuse reflectance spectrum. The results showed that TCA composites had remarkable enhancement in the separation of photogenerated carriers and the utilization of light, which was as result of the coordination of the three components. For photodegradation of RhB or phenol under simulated sunlight, TCA-1 samples revealed the best photocatalytic degradation performance, and the corresponding degradation rates were 91.4% at 60 min and 90.0% at 120 min, respectively. Moreover, TCA-1 composites maintained superior degradation performance after reusability tests, indicating that TCA-1 composites had excellent photochemical stability. For experimental results, a possible photodegradation mechanism of TCA composites was also proposed.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING & TECHNOLOGY
·
2020
·Vol. 44
·期 2
·265-272
·
IF 1.543
Yue Feng,Ning Guo,Shaojie Ren,Xuan Xie,Juan Xu,Yunkun Wang
Membrane fouling is a major hindrance to the effective application of polyethersulfone (PES) membranes. Synthetic silver nanoparticles @ zeolitic imidazolate framework-8 (AgNPs@ZIF-8) hybrid crystals were used to modify the PES microfiltration membranes for mitigating membrane fouling and better water permeability. The surface modification of AgNPs@ZIF-8 hybrid crystals improved the antifouling property of the membranes. The number of live bacteria in the bacteria suspension was over 90 % less than that of control membranes. Furthermore, after surface modification, the membrane permeability was enhanced, which was due to increased surface hydrophilization of the membranes which could partly explain the improved antifouling property. The results demonstrate that the use of AgNPs@ZIF-8 hybrid crystals is a feasible and attractive approach for the development of antifouling membranes.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Huasheng Lai,Gongke Li,Zhuomin Zhang
In this work, a native beta-cyclodextrin capped silver nanoparticles decorated Ti 3 C 2 T x nanosheets (Ti 3 C 2 T x -AgNPs@β-CD) surface-enhanced Raman scattering (SERS) substrate was developed by a facile one-pot method. The two-dimensional Ti 3 C 2 T x nanosheets not only acted as the supporter to load AgNPs, but also served as chemical enhancement material. Meanwhile, β-CD played a critical role in the control of morphology and size of AgNPs, and its supramolecular structure also endowed the Ti 3 C 2 T x -AgNPs@β-CD substrate with selectivity. The Ti 3 C 2 T x -AgNPs@β-CD substrate exhibited excellent sensitivity, good intra-batch and inter-batch reproducibility, and long-term stability by detecting methylene blue model molecule. Then, the substrate was applied for selective determination of erythrosin B among pigment additives via the host-guest size-matching effect. The proposed SERS method with linear range of 1−100 mg/L and detection limit of 30 μg/L could realize rapid SERS analysis of erythrosin B in dyed food samples within 15 min with recoveries of 78.1 %–113.2 %. Erythrosin B was actually found in dyed cherry with 49 mg/kg and marshmallow with 16 mg/kg, and the result matched well with that of UV–vis method. Such a robust substrate possessed great values for efficient and rapid on-site SERS analysis in food safety issues.
研究领域:
食品安全
·
分析化学
·
纳米材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）