SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Xin Zhou,Jiaxin Xu,Dongzhi Chen,Cheng Chen,Caihong Lv,Liangzhe Chen,Xianwen Ke,Xinghai Liu
The integration of gas sensing unit and low-cost wireless communication equipment enables real-time detection of various environmental gases, which is of great significance for food safety, medical diagnosis and environmental monitoring. In this study, copper phthalocyanine powder (CuTsPc) was prepared by high temperature solid phase melting technology. Ternary ammonia sensors with exceptional sensitivity to ammonia and conductivity were successfully fabricated by growing polyaniline/copper phthalocyanine/silver nanoparticles (PANI/CuTsPc/AgNPs) composites on polyethylene terephthalate films by in-situ polymerization. The morphology and composition of the films were characterized by FTIR, XRD and SEM, respectively. The ammonia sensing performance of the films at room temperature was systematically investigated. It is found that the flexible PANI/CuTsPc/AgNPs gas sensor exhibited rapid response time (61 s), fast recovery time (19 s), low theoretical detection limit (0.234 ppm), high response value (3.6 towards 500 ppm NH 3 ), and excellent stability at room temperature. These remarkable response characteristics can be attributed to the synergistic effect between protonic acid-doped PANI, CuTsPc derivatives with an electron-withdrawing group, and AgNPs possessing both chemical sensitisation and electron sensitisation. Finally, the sensor material was transformed into a label antenna pattern as well as sensor transducer through series and parallel antenna loop access methods to create a wireless sensor system based on near-field communication (NFC). This system can offer real-time sensing and monitoring of changes in food packaging environment by non-contact recognition way, making it highly promising for future applications in intelligent packaging.
研究领域:
材料科学
·
食品科学
·
传感器技术
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Wanying Wu,Tingjun Dai,Jun Pu,Kun Zhong,Dongqi Zhu,Xin Li,Shiya Zheng,Bing Liu
Rapid analysis of pesticide residues is essential for food safety, and the efficient extraction pesticide molecules from the irregular surfaces remains huge challenges. In the present study, a proof-of-concept flexible surface-enhanced Raman scattering (SERS) patch for rapid label-free detections of thiabendazole (TBZ), triazophos (TAP), and chlorpyrifos (CPF) on the surfaces of vegetables and fruits was developed. The novel SERS patch was supported by a flexible polymethylsiloxane (PDMS), and a microhole array was arranged on the surface of the PDMS. Colloidal silver nanoparticles (AgNPs)-modified inverse opal photonic crystal (IOPC) structure was fabricated in the microhole. The patch simultaneously exhibited the characteristics of high sensitivity analysis, “sticky” and “absorbent” properties, which enabled it possible to extract pesticide molecules on complex surfaces quickly and efficiently by “press and peeled-off” procedure. The results indicate that the extraction efficiency was 55.13 ± 8.85 % on the apple surface, and the detection limits of TBZ, TAP, and CPF were 24.15, 37.56, and 4.21 ng cm −2 , respectively. Conceivably, the as-proposed strategy may also be applied to environmental monitoring and quality control in food production to ensure human life and health.
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Caixiu Luo,Xiaohong Liu,Fuxin Liu,Nan He,Rong Yu,Xiuhui Liu
The detection of hydrogen peroxide (H 2 O 2 ) has considerable significance in industrial application and pathological monitoring. Inspired by the attributes of functional mesoporous carbons, a non-enzymatic sensor was constructed based on AgNPs doping carbon nanoflower composites (AgNPs/CNF). The characterization results showed that AgNPs/CNF with nanoflower structure greatly enhanced electron transfer rate and displayed outstanding catalytic performance for H 2 O 2 . Remarkably, the prepared sensor presented super low detection limit (5.83 × 10 −11 M) and the wider detection range (1.75 × 10 −10 – 5.41 × 10 −3 M). In addition, the content of H 2 O 2 in the actual disinfectant and human serum samples were further detected, and the recover ratios were 96.00 % – 104.0 % and 96.00–105.2 %, respectively, indicating the prepared sensor can detect H 2 O 2 effectively.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Zhixiong Liu,Shu Tian,Qiang Li,Jiancheng Wang,Jibin Pu,Gang Wang,Wenjie Zhao,Feng Feng,Jun Qin,Lichun Ren
The reduced graphene oxide/silver nanoparticle (AgNPs@rGO) nanocomposite was prepared via a simple, straightforward, and environmentally benign thermal reduction method. Dual-functional ORMOSIL (organically modified silicate) coatings with AgNPs@rGO nanocomposite were developed for corrosion and fouling inhibition of copper metals. Fourier transform infrared spectroscopy (FT-IR), ultraviolet–visible–near-infrared absorption spectrum (UV–vis–NIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) spectra indicated that the metallic silver nanoparticles (AgNPs) were successfully formed. Scanning electron microscopy (SEM), scanning probe microscopy (SPM), and transmission electron microscopy (TEM) demonstrated that the spherical AgNPs were uniformly distributed across the GO sheets with an average size of 14.9 ± 6.9 nm. Density functional theory (DFT) was used to explore the corresponding adsorption mechanism. The AgNPs@rGO nanocomposite could be well-dispersed into the ORMOSIL sols because of the strong binding strength between the AgNPs and thiol functionality of the sol precursor. Results from electrochemical tests indicated that the introduction of AgNPs@rGO nanocomposite would effectively improve the corrosion resistance of ORMOSIL coatings in a simulated marine environment. The well-dispersed performance of AgNPs@rGO nanocomposite in the coating was favorable to filling the original defect and enhancing the complication of penetration path. Combining the merits of flexible PDMS and AgNPs@rGO nanocomposite into the sol–gel coating greatly improved the corrosion resistance of the hybrid coating. The antifouling test indicated that the ORMOSIL coating with AgNPs@rGO nanocomposite showed excellent antibacterial and antialgae properties. The ORMOSIL coatings filled with AgNPs@rGO nanocomposite have promising applications in the protection of copper metal from corrosion.
研究领域:
材料科学
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化学工程
·
环境科学
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产品关联
DOI
高影响因子
LANGMUIR
·
2018
·
IF 3.789
Jiayin Song,Yingnan Zhu,Jiamin Zhang,Jing Yang,Yan Du,Weiwei Zheng,Chiyu Wen,Yumiao Zhang,Lei Zhang
Silver nanoparticles (AgNPs) have been widely used as catalysts in a variety of chemical reactions owing to their unique surface and electronic properties, but their practical applications have been hindered by severe aggregation. The immobilization of AgNPs is crucial to preventing their aggregation or precipitation as well as to improving their reusability. Herein, we developed a facile route for the reductant-free in situ synthesis of AgNPs in zwitterionic hydrogels. Via this method, the embedded AgNPs had a uniform distribution, high activity, and antibiofouling capability. The catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) using polycarboxybetaine-AgNPs (PCB-AgNPs) could achieve >95% conversion efficiency within 5 min. Meanwhile, the normalized rate constant knor (10.617 s–1mmol–1) was higher than that of most of the reported immobilized nanocatalysts. More importantly, in a biofouling environment, PCB-AgNPs could still exhibit >97% initial catalytic activity while AgNPs in the PSB or PHEMA hydrogel lost ∼60% activity. This strategy holds great potential for the immobilization of nanoparticle catalysts, especially for applications in biological environments.
研究领域:
材料科学
·
化学工程
·
纳米技术
·
生物催化
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 39
·期 12
·9518-9524
·
IF 3.086
Lin Zhong,Tong Yang,Jian Wang,Cheng Zhi Huang
The catalysis of nanomaterials is interesting and attractive. Herein, electrospinning was employed to afford poly(methyl acrylate) (PMAA)–poly(vinyl pyrrolidone) (PVP) electrospun nanofibers. Next, in situ photosynthesis resulted in the formation of a uniform assembly of silver nanoparticles (AgNPs) over the electrospun fibers, generating AgNPs–PMAA–PVP electrospun nanofibers. The as-formed AgNPs–PMAA–PVP electrospun nanofibers were utilized for investigating the catalytic reduction of 4-nitrophenol (4-NP) in the presence of NaBH4. For the in situ synthesis, the available light sources used included sunlight, table lamps, and 365 nm UV lamps. The results showed that the AgNPs–PMAA–PVP electrospun nanofibers could catalyze the reduction of 4-NP in the presence of NaBH4, generating 4-aminophenol (4-AP), therefore reducing the toxicity of 4-NP. After the use of the AgNPs–PMAA–PVP electrospun nanofibers for up to 4 cycles, the catalytic efficiency remained as high as 90%, suggesting that the noble metal/polymeric electrospun nanofibrous catalyst is highly effective and reusable.
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Kaiyu Zhang,Yuxin Sang,Yingdi Gao,Qinxing Sun,Weina Li
In this paper, a simple and effective fluorescence turn-on approach for highly sensitive and selective monitoring Hg 2+ ions was designed by using carbon dots (CDs) and silver nanoparticles (AgNPs). It reveals that the fluorescence of CDs solution can be quenched in the presence of AgNPs through inner filter effect (IFE) and the quenched CDs-AgNPs system is turned on after addition of Hg 2+ ions, which is due to higher affinity of Hg 2+ and AgNPs than that of CDs and AgNPs, thus resulting the disappearance of AgNPs from the CDs-AgNPs composites and leading to the fluorescence turn-on of CDs. The developed fluorescence turn-on approach exhibited high selectivity and sensitivity for detection of Hg 2+ . Under the optimum experimental conditions, good linearity was achieved over the range of 100–160 μM and the limit of detection (LOD) was estimated to be 2.22×10 -8 M for Hg 2+ . The recoveries of Hg 2+ spiked in real samples ranged from 98.4% to 101.6%. Results of this study suggest that the fluorescence turn-on approach can be used to the detection of Hg 2+ in real water samples.
研究领域:
分析化学
·
环境科学
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MICROSCOPY
·
2022
·Vol. 289
·期 3
·187-197
·
IF 1.952
Jiajing Zhu,Yanling Tian,Liang Cao,Jing Hu,Jin Yan,Zuobin Wang,Xianping Liu
Currently, silver nanoparticles (AgNPs) are the most produced nanoparticles in global market and have been widely utilized in the biomedical field. Here, we investigated the morphological and mechanical effects of AgNPs on cancerous cells of A549 cells and SMMC-7721 cells with atomic force microscope (AFM). The influence of AgNPs on the morphological properties and mechanical properties of cancerous cells were characterized utilizing the force–volume (FV) mode and force spectroscopy (FS) mode of AFM measurement. We mainly focus on the comparison of the effects of AgNPs on the two types of cancerous cells based on the fitting results of calculating the Young's moduli utilizing the Sneddon model. The results showed that the morphology changed little, but the mechanical properties of height, roughness, adhesion force and Young's moduli of two cancerous cells varied significantly with the stimulation of different concentrations of AgNPs. This research has provided insights into the classification and characterization of the effects of the various concentrations of AgNPs on the cancerous cells in vitro by utilizing AFM methodologies for disease therapy.
研究领域:
生物医学
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纳米科技
·
细胞生物学
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DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Shuwei Tang,Zhengguo Wu,Xiaoyun Li,Fengwei Xie,Dongdong Ye,Eduardo Ruiz-Hitzky,Lansheng Wei,Xiaoying Wang
Super strength and high barrier properties are the bottleneck of the application of cellulose film materials. Herein, it is reported a flexible gas barrier film with nacre-like layered structure, in which 1D TEMPO-oxidized nanocellulose (TNF) and 2D MXene self-assembled to form an interwoven stack structure with 0D AgNPs filling the void space. The strong interaction and dense structure endowed TNF/MX/AgNPs film with mechanical properties far superior to PE films and acid-base stability. Importantly, the film presented ultra-low oxygen permeability confirmed by molecular dynamics simulations and better barrier properties to volatile organic gases than PE films. It is here considered the tortuous path diffusion mechanism of the composite film responsible for the enhanced gas barrier performance. The TNF/MX/AgNPs film also possessed antibacterial properties , biocompatibility and degradability (completely degraded after 150 days in soil). Collectively, the TNF/MX/AgNPs film brings innovative insights into the design and fabrication of high-performance materials.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Guangzheng Wang,Jiaona Hou,Kai Yu,He Xu
The disposal of mobile phone print circuit boards (WMPCBs) has now been a problem because of the continually increasing production of mobile phones. It could be considered a new source of precious metal but may jeopardize the environment and human health without proper management. An emulsion liquid membrane (ELM) method is applied and improved to recover silver from WMPCBs and prepare AgNPs . The effects of significant operating parameters were studied for a better understanding of the ELM process. Under the optimized conditions i.e., 0.25 % (v/v) Cyanex 302, 6 % (v/v) Span 80, 5 % (w/v) ASC , 3500 rpm emulsification speed, 10 min emulsification time, 300 rpm extraction stirring speed, 10 min extraction stirring time and 3 (v/v) phase ratio, 98.7 % silver was extracted. AgNPs produced were flower structures assembled by a group of individual nanosheets with a diameter of 800–1400 nm and a thickness of 10–14 nm. The purity was 98.7 % and the yield was 96.6 %. AgNPs of oblate spheroidal structure with a diameter of 30–50 nm could be synthesized by controlling the concentration of Span 80 in ELM. The current study intends to fulfill the gap by exploring the recovery of silver from WMPCBs by the ELM method.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Wenhao Liu,Qimeng Jiang,Jihai Cai,Desheng Wang,Hao Wang,Chunsheng Pang,Ying Liu,Xiaoying Wang
At present, the reuse of corn stalk (CS) or other biomass stalk generally requires crushing or dissolution, which leads to waste of energy and use of toxic chemicals. In this work, porous CS was directly utilized without any pretreatment as furniture and building materials by loading silver nanoparticles (AgNPs) and montmorillonite (MMT), which endowed excellent flame retardant and antibacterial properties . Firstly, CS was delignified (DLCS) to expose more porous structures. Then, DLCS was used to in situ reduce and immobilize AgNPs, and MMT particles was further loaded into holes of DLCS to prepare antibacterial and flame-retardant CS (DLCS/MMT/AgNPs). Due to the oxygen barrier layer formed by MMT in the combustion process, the time DLCS/MMT/AgNPs started combustion delayed to 5 s while that of CS was 1 s. The combustion residue of DLCS/MMT/AgNPs retained after burning under nitrogen and air atmosphere at 800 °C were 65.8% and 61%, respectively, and basically maintained its original morphology. Furthermore, AgNPs endowed DLCS/MMT/AgNPs with the inhibition zone of 3.5 mm and 2.0 mm for E. coli and S. aureus , respectively, as well as long-lasting antibacterial property for at least 7 days. This work laid a theoretical foundation for agricultural waste CS to realize the high-value utilization in an economical and environmentally friendly way.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
Environmental Science-Nano
·
2025
·
IF 5.1
Xiangrui Wang,Dingyuan Liang,Wen-Xiong Wang,Xiaoli Zhao,Ying Wang,Wenhong Fan
Nanoparticles (NPs) are increasingly explored for applications in algal biotechnology, drawing growing attention to nano-bio interactions. Among them, silver nanoparticles (AgNPs) have attracted attention for their potent biological effects. However, the mechanisms by which their penetration into the algal cells remain poorly understood, primarily due to the indistinguishable contributions of released ions versus the NPs themselves. In this study, the mechanisms by which AgNPs penetrate algal cells were investigated, using engineered Au@Ag core–shell nanoparticles to decouple the effects of dissolution from other physicochemical properties. Specifically, three types of Au@AgNPs with identical size (20 nm) and surface chemistry but different Ag release profiles were synthesized by varying the size of the gold core. It is demonstrated that the AgNPs alone were unable to penetrate the cell wall of a freshwater phytoplankton Chalmydomonas reinhardtii. Instead, the release of Ag ions by the surface adsorbed AgNPs induced significant damages to the cell wall, which subsequently allowed the AgNP entry and internalization. Quantitative analysis revealed that over 75% of the accumulated Ag was internalized in its ionic form, and more than 89% of total Ag in the algae existed as particulate form. The presence of dissolved organic matter alleviated both the bioaccumulation and toxicity of NPs, but also influenced the intracellular biotransformation of Ag. This study provided novel insights into the penetration mechanisms of AgNPs and presents the quantitative distinction between the contributions of ions and AgNPs.
研究领域:
环境纳米技术
·
藻类生物技术
·
纳米-生物相互作用
·
环境毒理学
·
材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）