SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Shixuan Su,Shanshan Li,Jing Hu,Ting Yu,Lingchen Tao,Fuliang Hu,Yunlei Xianyu
Royal jelly as a functional food has great potential to promote human health. As a unique ingredient in royal jelly, 10-hydroxy-2-decenoic acid (10-HDA) is a vital criterion to evaluate the quality of royal jelly. Current approaches for 10-HDA detection mainly rely on high-performance liquid chromatographic (HPLC), but it requires large-scale equipment and skilled technicians that are costly and time-consuming. Herein, we report a colorimetric sensing strategy for 10-HDA detection based on Ag(I) and tetramethylbenzidine (TMB), a widely used chromogenic reagent. Ag(I) can oxidize TMB to generate oxidized TMB (oxTMB) showing a light-blue color. Due to the chelation with Ag (I), the introduction of 10-HDA can prevent the generation of oxTMB that results in a color fading and a decrease in absorbance. This colorimetric sensing strategy enables highly sensitive detection of 10-HDA with a linear range from 1 μM to 10 μM and a limit of detection of 0.13 μM. More importantly, this 10-HDA assay allows for a visual readout either by a smartphone or the naked eye with low cost, convenience, and rapid response that has been successfully applied for evaluating the quality of royal jelly in actual samples. The sensing strategy developed in this work provides a new colorimetric approach that holds great promise as a point-of-care platform for the food industry.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Zenghui Mai,Senqing Fan,Yilin Wang,Jiaojiao Chen,Yu Chen,Ke Bai,Lei Deng,Zeyi Xiao
An Ag@PAN catalytic nanofiber composite membrane has been fabricated by combining electrospinning PAN nanofiber seeding with 2-MI and flowing synthesis. ZIF-8 can be immobilized on the surface of the nanofibers with Zn(NO 3 ) 2 solution flowing through the 2-MI/PAN nanofiber membrane and Ag nanoparticles can be immobilized on the nanofibers with Zn 2+ in ZIF-8 exchanged by Ag + followed with reduction reaction. The characteristics of XRD , XPS , FTIR, TGA, HRTEM , and BET proved the successful immobilization of Ag nanoparticles derived from ZIF-8 on PAN nanofiber. The permeance of the Ag@PAN catalytic nanofiber composite membrane can reach 19,227 L m −2 h −1 bar −1 with Ag nanoparticles immobilization amount of 49.64%. The p -NP conversion reaction is addressed for the catalytic performance of the Ag@PAN catalytic nanofiber composite membrane. The conversion rate of 99% can be achieved under the condition of p -NP concentration of 0.025 mM and membrane flux of 300 L m −2 h −1 . The apparent reaction rate constant of 236.63 min −1 can be achieved by flowing through mode, which is 4-5 orders of magnitude higher than that in a stirred tank reactor with Ag powders as the catalyst. The catalytic performance of the composite membranes has not declined significantly after ten cycles of the catalysis experiment, implied the good repeatability of the Ag@PAN catalytic nanofiber composite membranes.
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ANALYTICA CHIMICA ACTA
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2023
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IF 6.2
Yue Pan,Shan Xu,Zhouping Wang,Caiyun Jiang,Xiaoyuan Ma
Background Histamine is a kind of biogenic amine with strong toxicity and potential carcinogenicity . Many traditional methods of detecting histamine have the disadvantages of cumbersome detection steps, expensive equipment, and high professional requirements for staff. In contrast, SERS has become the preferred method for quantitative analysis of histamine because of rich fingerprint information, rapidity and economy. However, most of SERS substrates still have technical problems, such as poor stability, low sample collection rate, and detection efficiency. Therefore, there is a great need for new strategies to develop high-performance SERS substrates based sensors. Results In our study, a sensitive SERS aptasensor for the detection of histamine was synthesized. The assembly was formed between IRMOF-3@Au/PDMS (flexible SERS substrate) and AuNR-DTNB@Ag-HA apt (Raman signal probe with both the target capture ability) via π-π stacking interaction from HA aptamer and IRMOF-3. Consequently, the SERS signal of the assembly derived from DTNB reached highest due to the synergistic enhancement effect by AuNR@Ag and IRMOF-3@Au. Meanwhile, HA aptamer can specifically capture histamine, therefore histamine addition competitively bound to the probe, leading to a corresponding decrease in the DTNB signal value on the SERS substrate. The SERS intensity at 1331 cm −1 presented a good linear relationship towards the logarithmic value of histamine concentrations ranging from 0.0001 mg/L to 400 mg/L (R 2 = 0.990) with the LOD of 3.6 × 10 −5 mg/L. Furthermore, the application in wine samples demonstrated the accuracy and applicability of the developed sensor. Significance This method effectively improves substrate stability, detection sensitivity and signal response immediacy to amplify the SERS sensor, thus satisfying the histamine detection requirements of various systems. According to this aptasensor design, our strategy can be extended to create other MOF-based SERS substrates for accurately detecting relative targets to ensure food safety.
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高影响因子
INORGANIC CHEMISTRY
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2023
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IF 4.6
Weihao Zhao,Jinxin Fan,Yuan Tian,Cheng Wang
Lithium metal batteries have become one of the most promising rechargeable batteries due to the ultrahigh theoretical specific capacity of the Li metal anode. However, the Li dendrite growth and volume change of the Li metal anode during repeated Li plating–stripping cycles restrict the practical viability. Herein, a unique lithiophilic gradient structure of uniformly incorporating Ag nanoparticles into a three-dimensional (3D) nanofiber framework with amorphous SiO2 and TiO2 hybrids was prepared by an electrospinning process and used as a multifunctional interlayer between the pristine separator and Li metal foil. The 3D framework not only possesses excellent flexibility but also alleviates volume changes, which can withstand massive Li loading and promote uniform Li+ distribution. In addition, the 3D lithiophilic gradient structure allows for regulable Li+ flux and suppresses Li dendrite growth. Impressively, the Li||Li symmetric batteries with Ag@SiO2–TiO2 interlayers exhibit a prolonged lifespan of 1500 h at 0.5 mA cm–2 for 0.5 mAh cm–2. The full cells coupled with the Ag@SiO2–TiO2 interlayer show a capacity retention rate of 94.6% after 1000 cycles and a high rate capability. This work provides promising guidance for the design of a gradient-distributed lithiophilic structure toward an ultrastable Li metal anode.
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高影响因子
Small
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2024
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IF 13
Suyue Luo,Zhenzhong Liu,Xinran Yin,Zuopeng Lin,Shuo Zhang,Junfeng Chen,Minghui Guo
The severe deterioration of the marine ecosystem significantly negatively impacts the performance of solar-driven steam generation (SSG) and the quality of the obtained freshwater. Herein, a bifunctional Ag/MgFe 2 O 4 @SCW reactor with a sandwich structure is designed for efficient SSG and Cr(VI) reduction, which is constructed via in situ deposit Ag nanoparticles (NPs) and MgFe 2 O 4 onto surface carbonized wood (SCW). Owing to the advanced sandwich structure and strong interfacial interactions between each component, an ultra-high evaporation rate of 1.55 kg m −2 h −1 and the efficiency of 88.6% are achieved using Ag/MgFe 2 O 4 @SCW under 1 sun. The system exhibits the long-term evaporation performance in the simulated sewage and strong acid/base solutions along with water-harvesting capacity in outdoor solar desalination. The quality of distilled water after desalination of actual seawater and NaCl solutions with different concentrations meets the WHO-recommended drinkable water standards. Furthermore, Ag/MgFe 2 O 4 @SCW shows outstanding antibacterial property, self-desalting capacity, as well as reusability and structure stability. Most importantly, the fast carrier separation endows Ag/MgFe 2 O 4 @SCW with superior photocatalytic activity and Cr(VI) photoreduction of up to 96.1% after 180 min of illumination. The bifunctional Ag/MgFe 2 O 4 @SCW reactor provides an advanced synergistic mechanism for improving SSG and photocatalytic performance, while being promising for solar-powered production of clean water.
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SURFACE & COATINGS TECHNOLOGY
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2023
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IF 5.4
Yuhan Zhang,Jingjie Yu,Jiabao Guo,Guandi He,Yonghe Zhao,Qinqin Lu,Junzhi Wu,Xinrui Shu,Xiao Lin,Qiang Chen
Modification of porous titanium (PT) implants with biological coatings is being challenged due to their inert surface and complex internal structure. A facile flow-casting technique has been utilized to prepare a bioceramic coating consisting of 45S5 bioactive glass (BG) and core-shelled [email protected] particles homogeneously on the entire surface of PT. The addition of [email protected] nanoparticles facilitated the sintering of BG and subsequently enhanced the adhesion of the coating. Slightly delayed hydroxyapatite formation was also detected probably due to minimized release and consumption of calcium ions . In-vitro assessments of the coating cultured with MC3T3-E1 osteoblasts and Staphylococcus aureus were carried out to assess their potential as multifunctional bone implants with excellent bioactivity and antibacterial properties. A template for producing robust and multi-component ceramic coatings on PT and other porous implants with tailorable biological properties for bone tissue engineering has been established.
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高影响因子
APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Wenqing Yu,Fanming Meng,Hainan Wei,Han Zhang,Sheng Yao
Designing heterogeneous photocatalysts to enhance the activity of photo-induced ch arge separation for efficient degradation of organic pollutants in aqueous systems remains a significant challenge. A double Z-scheme Ag 3 PO 4 /MOF-In 2 S 3 /Bi 2 S 3 heterojunction containing trace Ag compositing was rationally designed and prepared, and fully characterized. Nitrogen adsorption–desorption experiments and Ultraviolet–Visible diffuse reflection spectroscopy (UV–Vis DRS) showed that the heterostructure expanded the surface area of single component, and had the highest absorption rate and the widest range of light. The presence of Ag in this heterostructure was demonstrated by transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS), which explained the strong resistance to photo corrosion and the highest current density exhibited by the composite in photocurrent response testing. The photocatalytic degradation of the antibiotic levofloxacin (LVX) was carried out, in which the degradation proportion of ABIS-Ⅲ sample was as high as 93.6 % within 90 min. Free radical scavenging assay and ESR experiment demonstrated that OH and O 2 – worked together to promote the degradation of LVX. Combined theoretical calculations with experimental results to reasonably construct a double Z-scheme to elaborate the carrier migration paths under light illumination. This novel double Z-scheme model heterojunction is expected to provide new ideas for the study of the photocatalytic mechanism of multiplicity complexes and the removal of antibiotic contaminants.
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ANALYTICAL CHEMISTRY
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2026
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IF 7.3
Yingfang Zhang,Sihai Luo,Sen Jiang,Hao Sun,Hongyi Shen,Lijuan Chen,Qi Yuan,Xiaoliang Chen,Nan Zhang,Fang Mi,Yi Lv,Fenggang Ren,Jinyou Shao
Abstract The confinement of light into nanometer-sized (typically <10 nm) metallic nanogaps can generate extremely high near-field enhancement, dramatically boosting absorption, emission, and Raman scattering of target molecules situated within the gaps. However, the scarcity of cost-effective, reliable, and high-throughput nanofabrication techniques capable of fabricating sub-10 nm gaps, particularly in binary nanostructures, has significantly hindered their practical applications. Here, a high-throughput nanofabrication strategy that combines anodic aluminum oxide (AAO) templates, molecular self-assembly, and glancing-angle ion-beam etching (IBE) is proposed to controllably produce large-scale bimetallic gold–silver (Au–Ag) arrays with approximately 5 nm gaps. These arrays serve as exceptional surface-enhanced Raman spectroscopy (SERS) substrates, allowing for the ultrasensitive detection of target molecules with limits of detection (LODs) as low as 10–11 M for rhodamine 6G (R6G) and 4-mercaptobenzoic acid (4-MBA) and 10–8 M for bilirubin. The bimetallic Au–Ag nanogap arrays leverage the synergistic effects of gold’s strong absorption and silver’s superior plasmonic properties, achieving significantly enhanced electromagnetic fields compared to monolithic Au–Au nanogap arrays. This cost-effective and efficient nanofabrication approach overcomes the limitations of conventional methods for fabricating binary nanostructures, providing a viable solution for developing high-sensitive and reliable SERS-based detection platforms toward chemical-/bio-sensing.
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ACS Applied Nano Materials
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2023
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IF 5.9
Yicheng Ye,Qiaohong Zhang,Dezhong Xie,Chen Chen,Fan Li,Hu Wang,Shun Zhang,Wei Zhang
Ethanol-based drinks and disinfectants are widely consumed around the world. Acetaldehyde (AA) is the main impurity in ethanol, which is also a representative volatile organic compound (VOC). Increased attention should be paid to the potential harm caused by AA in ethanol due to the significant increase of AA exposure even in nondrinkers. With Ag nanoparticles (NPs) being supported on the phenyl group-modified silica (Ag/Ph-SiO2) as the catalyst, which was prepared by a simple one-pot reverse-phase microemulsion method, a catalytic hydrogenation removal strategy has been illustrated in the present work to ultradeeply remove AA in ethanol. The introduction of phenyl groups facilitated the distribution of Ag NPs, the formation of the pore structure, and the improvement of the surface affinity to AA molecules, which are beneficial for the adsorption and conversion of AA in ethanol. The AA content in ethanol could be controlled to be below 0.1 ppm at 90 °C in 5 h under 3 MPa H2 pressure. The safety of ethanol-based products is believed to be greatly improved with the present technology.
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ACS Applied Nano Materials
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2023
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IF 5.9
Hanlin Li,Xiaohui Fang,Chen Kang,Zhoutao Sun,Hongmei Liu,Xinping Zhang
Rapid trace gas identification is challenging due to the low adsorptivity of gaseous molecules on solid substrates under ambient conditions. In this article, we present a gas sensor utilizing a capillary serving as a surface-enhanced Raman scattering (SERS) probe. The capillary is decorated with densely distributed Ag/ZnO nanocomposites within its microchannel, resulting in an enlarged specific surface area that enhances gas adsorption and chemical enhancement and provides abundant SERS hotspots. The introduction of gas into the capillary leads to the immediate appearance of distinctive Raman characteristic peaks, and the entire measurement process can be performed under ambient conditions. The detection limit for gases of NO2 and SO2 reaches as low as 0.1 ppb. Furthermore, the sensor exhibits the capability to identify components of mixed gases as well as effectively detect NO2 in vehicle exhaust emissions. With all of these advantages, the SERS-active capillary demonstrates promising potential for practical applications, particularly in the rapid and accurate identification of trace-level gases.
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International Journal of Nanomedicine
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2023
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IF 8
Nan Jiang,Shuaiwei Zhao,Shilei Wang,Zhong Lu
Introduction As a biofilm-associated disease, dental caries benefits from nanoparticle (NP)-based therapies. Streptococcus mutans (S. mutans) is a primary aetiologic agent for dental caries development. We successfully applied a synergistic therapy of Ag/ZnO nanocomposites combined with light-emitting diode (LED) radiation to inhibit S. mutans biofilms. However, the antibiofilm mechanism has not been fully elucidated, and little is known about the biofilm formation ability of bacteria that survive NP-based therapies.Methods This study explored the antibiofilm formation mechanism of this synergistic therapy by an integrated approach based upon proteomics.Results Synergistic therapy killed 99.8% of bacteria, while the biofilm formation ability of 0.2% surviving bacteria was inhibited. The proteomic responses of S. mutans to synergistic therapy were comprehensively characterized to unveil the mechanism of bacterial death and biofilm formation inhibition of the surviving bacteria. In total, 55 differentially expressed proteins (12 upregulated and 43 downregulated) were recorded. The bioinformatic analysis demonstrated that cellular integrity damage and regulated expression of structure-associated proteins were the main reasons for bacterial death. In addition, the proteomic study indicated the potential inhibition of metabolism in surviving bacteria and provided a biofilm-related network consisting of 17 differentially expressed proteins, explaining the multiantibiofilm formation actions. Finally, we reported and verified the inhibitory effects of synergistic therapy on sucrose metabolism and D-alanine metabolism, which disturbed the biofilm formation of surviving bacteria.Conclusion Our findings demonstrated that synergistic therapy killed most bacteria and inhibited the surviving bacteria from forming biofilms. Furthermore, the antibiofilm formation mechanism was revealed by proteomics analysis of S. mutans after synergistic therapy and subsequent metabolic studies. Our success may provide a showcase to explore the antibiofilm formation mechanism of NP-based therapies using proteomic studies.
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MATERIALS CHEMISTRY AND PHYSICS
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2023
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IF 4.6
Mingxue Zhang,Ziheng Li,Zeyu Zhang,Hongshun Hao,Shuang Yan
In order to develop a gas sensitive material with both high sensitivity and good selectivity , Ag–SnO 2 MIPs were designed and synthesized by adopting molecular imprinting technique. Specifically, SnO 2 nanospheres synthesized through hydrothermal method were used as substrate. Then, Ag–SnO 2 was assembled by decorating nano-sized Ag on the surface of SnO 2 nanospheres. Molecular imprinting modification with formaldehyde as template molecules was in next conducted to get Ag–SnO 2 MIPs. The morphology, valence and crystal structure of the samples were characterized using SEM, XRD , TEM and XPS . The characterization results showed that uniform SnO 2 nanospheres were successfully synthesized with metallic Ag distributed on the surface, and the molecular imprinting process did not change the morphology of the material. According to gas sensing measurement results, it was found that the sensor based on Ag–SnO 2 MIPs exhibited superior formaldehyde sensing performance. The molecular imprinting modification effectively improved the sensor's selectivity towards formaldehyde gas. Owning to the catalytic property of Ag, the sensing response of sensor was greatly enhanced. Additionally, Ag–SnO 2 MIPs also exhibits high reproducibility and long-term stability.
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