KEY ENGINEERING MATERIALS
·
2020
·
IF 0
Jian Huang,Zhe Lei,Qian Zhang,Mei Juan Su,Liang Liu
Highly active Al-based Ag dendrites SERS plasmonic substrates have been rapidly synthesized by the one-step galvanic displacement reaction without the use of any surfactants and templates. The as-prepared SERS substrates were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman spectroscopy. XRD measurements confirmed the metallic nature of the formed Ag dendrites. None of the organic additives were used in the synthesis process, which ensures the substrates surfaces are completely clean and avoiding the introduction of organic contaminants. The innovative rough bionic substrates yield a final silver dendritic structure that offers large specific surface area and high-density hotspots. Using malachite green as a model target, the Al-based Ag dendrites SERS substrates exhibited acceptable reproducibility (relative standard deviation of 23.8%) and high enhancement capacities (pushed the detection limit down to 10 pM). Importantly, these Ag dendrites could potentially be employed as highly active and cost effective flexible SERS sensors for label-free ultrasensitive detection of biomolecules.
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DOI
Energy Advances
·
2023
·Vol. 2
·期 9
·1366-1374
·
IF 0
Zhengzhe Xie,Xiaoyuan Liu,Pengpeng Jia,Yu Zou,Jiang Jiang
Replacing water oxidation by the thermodynamically more favorable glycerol oxidation reaction in a photoelectrochemical (PEC) cell is highly desirable, which can not only improve the energy efficiency of hydrogen evolution, but also produce value-added chemicals, given that glycerol is easily accessible as a major byproduct from the biodiesel industry. Herein, a BiVO4/CoV-LDHs/Ag photoanode has been fabricated via a simple electrodeposition and redox strategy, which exhibits excellent PEC activity toward glycerol oxidation. A high photocurrent density of 7.15 mA cm−2 can be achieved at 1.23 V vs. reversible hydrogen electrode, in 0.5 M Na2SO4 solution with 0.1 M glycerol under AM 1.5G illumination, which is 2.7 times that of the pristine BiVO4 photoanode. The significantly enhanced PEC performance can be attributed to the narrowed optical band gap, and improved charge separation and injection efficiencies after surface deposition of CoV-LDHs/Ag on the BiVO4 photoanode. As a result, greatly improved hydrogen production efficiency has been achieved by coupling the photo-electrochemical glycerol oxidation on the BiVO4/CoV-LDHs/Ag photoanode, with the evolved hydrogen gas (123.5 mmol m−2 h−1) nearly double that when using the pristine BiVO4 photoanode.
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DOI
ACS Applied Energy Materials
·
2020
·
IF 4.473
Mohsin Ali Marwat,Muhammad Yasar,Weigang Ma,Pengyuan Fan,Kai Liu,Daju Lu,Yi Tian,Chanatip Samart,Baohua Ye,Haibo Zhang
The development of innovative dielectrics by considerably improving their energy densities of discharge is important for current electronic power systems. We present here newly designed heterogeneous sandwich structure nanocomposites (i.e., P(VDF-HFP)-xwt%Ag@BN nanosheets (Ag@BNN)/PEI-P(VDF-HFP)). The outer ferroelectric-type P(VDF-HFP) layers enhanced the dielectric displacement, while PEI reduced the losses due to its linear characteristic. Besides, the use of Ag@BNN as nanofillers improved the dielectric displacement, as well as breakdown strength. Consequently, the ideal sandwich structure achieved a significant energy density of 11.3 J/cm3 and decent charge–discharge efficiency of 80% at about 510 MV/m. This discharge energy density is the highest reported until now when charge–discharge efficiency of ≥80% is considered as the threshold. In-depth analysis revealed that comparatively higher Dmax – Dr (i.e., 4.7 μC/cm2), as well as the utmost breakdown strength (i.e., 510 MV/m), assisted in achieving this relatively higher discharge energy density. The finite element simulation demonstrated the efficacy of using Ag@BNN over BNN as nanofillers; i.e., it showed diverged electric field vectors near Ag nanoparticles, optimum electric field distribution between the sandwich structure layers, and improved dielectric displacement, in comparison with unmodified BNNs. The ideal sandwich structure also showed a short discharge time of 9.02 μs, a high power density of 0.165 MW/cm3, and an excellent lifetime until 40 000 cycles. This study shows that heterogeneous sandwich-structured nanocomposites with a surface decorated Ag@BNN nanofillers can be used in advanced dielectrics and pulsed power devices.
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DOI
高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 12
·1-13
·
IF 5.7
Zhu Yaodi,Tian Jiaqi,Li Miaoyun,Zhao Lijun,Shi Jiyong,Liu Weijia,Liu Shijie,Liang Dong,Zhao Gaiming,Xu Lina,Yang Shufeng
A new surface-enhanced Raman spectroscopy (SERS) biosensor of Graphene@Ag-MLF composite structure has been fabricated by loading AgNPs on graphene films. The response of the biosensor is based on plasmonic sensing. The results showed that the enhancement factor of three different spores reached 10 7 based on the Graphene@Ag-MLF substrate. In addition, the SERS performance was stable, with good reproducibility (RSD<3%). Multivariate statistical analysis and chemometrics were used to distinguish different spores. The accumulated variance contribution rate was up to 96.35% for the top three PCs, while HCA results revealed that the spectra were differentiated completely. Based on optimal principal components, chemometrics of KNN and LS-SVM were applied to construct a model for rapid qualitative identification of different spores, of which the prediction set and training set of LS-SVM achieved 100%. Finally, based on the Graphene@Ag-MLF substrate, the LOD of three different spores was lower than 10 2 CFU/mL. Hence, this novel Graphene@Ag-MLF SERS substrate sensor was rapid, sensitive, and stable in detecting spores, providing strong technical support for the application of SERS technology in food safety. Graphical abstract
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Qianxiao Fan,Wendi Zhang,Yilong Jin,Dongmei Zhang,Xianglong Meng,Wanxiong Peng,Jinhui Wang,Jinshan Mo,Kai Liu,Lehao Liu,Meicheng Li
All-solid-state lithium batteries employing sulfide solid electrolyte are promising candidates for next generation lithium batteries. Nevertheless, the unstable interface of sulfide solid electrolyte and Li metal has limited the lifespan of sulfide solid state lithium metal batteries. Herein, a composite protection layer composed of Li-Ag/LiF (LAF) is formed on Li metal surface by the in-situ reaction of silver-fluoride (AgF) and Li metal to solve the instability issue of the Li 6 PS 5 Cl/Lithium interface. The Li-Ag particles act as nucleation sites for Li deposition and LiF can avoid the growth of lithium dendrites. The density function theory (DFT) calculation results show the lithiophilic of Li-Ag alloys and high interfacial energy of LiF/Li 6 PS 5 Cl interface, proving the superiority of the LAF protection layer. The critical current density of the Li-LAF/ Li 6 PS 5 Cl/ LAF-Li symmetric battery is 1.6 mA cm −2 and the battery achieved a long lifespan of over 3000 h at 0.1 mA cm −2 and 0.1mAh cm −2 at room temperature. In addition, a high discharge capacity of 139.1mAh/g is obtained in the LiNbO3@LiCoO2/ Li6PS5Cl/ LAF-Li full cell. This work provides a feasible strategy for the interface modification of sulfide all-solid-state Li metal batteries.
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高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Yaqi Wang,Ying Zhang,Yuanfeng Wang,Yahe Zhang,Chunming Xu,Zhiming Xu,Quan Shi,Linzhou Zhang
The characterization of olefin compounds is crucial for elucidating the reaction network in thermal cracking processes. In this study, heavy olefins were selectively characterized by using Ag+ complexation electrospray ionization coupled with high-resolution Orbitrap mass spectrometry. Semiquantitative analysis of the olefin content was conducted using naphthalene-d8 as an internal standard. In thermal cracking products, heavy olefins with carbon numbers ranging from C10 to C50 were detected, with a concentration peak observed in the C20–C25 range. Linear monoalkenes were found to be the most abundant species. The molecular composition of olefins in cracking products under various reaction conditions was investigated, and based on these findings, the thermal cracking reaction network was analyzed. Furthermore, the correlation between the olefin content and the bulk properties of the thermal cracking products was well correlated. This study provides valuable insights into the complex reaction network involved in the residual thermal cracking process, thereby providing a theoretical foundation for process optimization.
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2014
·
IF 4.517
Yanlin Lv,Lili Zhu,Heng Liu,Yishi Wu,Zili Chen,Hongbing Fu,Zhiyuan Tian
A new type of fluorescent probe capable of detecting Ag + and Hg 2+ in two independent channels was developed in the present work. Specifically, in CH 3 CN–MOPS mixed solvents with CH 3 CN/MOPS ratio (v/v) of 15/85, this type of probe fluoresced weakly, and the addition of Ag + remarkably induced fluorescence enhancement of the probe. In CH 3 CN–MOPS mixed solvents with the percentage of CH 3 CN increased up to 65%, the probe was highly fluorescent and addition of Hg 2+ dramatically induced the fluorescence quenching. Thus, using such single-fluorophore-based probe and tuning the polarity of the mixed solvent, Ag + , and Hg 2+ can be detected in independent channels with high selectivity and sensitivity. As a result, the mutual interference usually encountered in most cases of Ag + and Hg 2+ sensing owing to the similar fluorescence response that these two ions induced, can be effectively circumvented by using the probes developed herein.
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2017
·
IF 4.95
Yi Wang,Yang Zeng,Wensheng Fu,Pu Zhang,Ling Li,Cuiying Ye,Lan Yu,Xiaochun Zhu,Song Zhao
Seed-mediated growth has been employed as a simple and powerful means to the shape-controlled synthesis of metal nanocrystals . In this work, we apply the principle of seed-mediated growth in analytical chemistry , and achieve improved sensitivity due to the low energy barrier in the target-induced formation of bimetallic nanoparticles with core-shell structure. As a result, a simple, reliable, highly sensitive and selective method for the detection of ellagic acid (EA), a naturally occurring polyphenolic antioxidant , has been developed. With the aid of EA in alkaline solution, Ag + ions can be transformed to Ag atoms and deposit on the surfaces of Au nanorods (AuNRs, act as seeds here) to generate Au@Ag core-shell nanorods, accompanied by blue shift of the longitudinal localized surface plasmon resonance (LSPR) band of AuNRs from near-infrared region to shorter wavelengths. Based on the linear relationship between the wavelength change of longitudinal LSPR band and the concentration of EA, our method achieves a detectable range of 0.2–20 μM and a limit of detection as low as 40 nM toward EA. This approach is highlighted by its high sensitivity for EA assay, which benefits from the viewpoint of thermodynamics in the nucleation/growth mode of metal nanoparticles. Moreover, this method shows high selectivity for EA detection when potential species coexist, and thus has been successfully applied in the detection of EA in skin-whitening cosmetics. The proposed strategy of seed-mediated growth herein can also be extended to other systems for sensing.
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Peng Bo Huang,Jing Long Qu,Shuo Yang,Tian Jiao Shui,Huan Huan Yang,Li Ping Cheng,Yang Qin,Jun Xi
Glycinin is a common food allergen, which may cause allergic shock in severe cases, thus posing a threat to public health. Therefore, rapid and accurate detection of glycinin is crucial. In this study, we synthesized Au Ag core–shell nanoparticles loaded with the Raman reporter molecule 5,5′-dithiobis(2-nitrobenzoic acid) (DTNB), which provides both colorimetric and Raman signal capabilities. These nanoparticles were applied to colorimetric lateral flow immunoassay (CM-LFIA) and surface-enhanced Raman scattering-based lateral flow immunoassay (SERS-LFIA), respectively. The CM-LFIA achieved a visual limit of detection (LOD) of 1 ng/mL, while the SERS-LFIA exhibited a LOD of 40 pg/mL, with good linearity over the range of 1 ng/mL to 10 4 ng/mL (R 2 = 0.997). Moreover, the quantitative SERS-LFIA demonstrated satisfactory performance in spiked food matrix samples, achieving acceptable recoveries of 82–88 % and RSD ranging from 4.88 % to 6.97 %.
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Dan Huang,Ling Li,Siqi Wei,Kaixi Yin,Wenjuan Shang,Xiandeng Hou,Li Wu
Heterogeneous bimetallic materials have attracted widespread concern in surface-enhanced Raman scattering (SERS) since the interactive coupling between these heterogeneous zones produces a synergistic enhancement effect. Developing a quick and easy method to prepapre bimetallic materials with superior SERS properties is therefore very important. A novel approach of electrodeposition followed by the galvanic replacement reaction (GRR) was proposed for fast fabricating copper-silver bimetallic heterogeneous dendrites on nickel foam (Cu-Ag dendrites@NF) as a stable SERS substrate. The morphology and compositions of the dendritic structure were well characterized by SEM, and XPS imaging provided a micro-area composition analysis. The metallic Cu-Ag dendrites exhibited better SERS enhancement performance than the pure metal, with an enhancement factor of 37 times that of the pure Ag cubes@NF, and 6 times that of the Ag dendrites@NF. The reason is that both the synergistic effect of plasmon coupling from bimetal Cu-Ag and the dendritic structure with large surface area and cusps contributed to electromagnetic enhancement. The substrate was successfully used for the detection of pesticide thiram, dye molecule crystal violet (CV), and toxic aromatic amines p-Aminoazobenzene (pAAB), with limits of detection (LODs) down to 10 −8 M, 10 −9 M, and 10 −8 M, respectively. This method provides a novel fast approach to fabricate a bimetallic substrate with high SERS activity, and may have broad applications in food analysis and environment monitoring.
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高影响因子
Journal of Materials Chemistry B
·
2025
·
IF 5.7
Yajie Cheng,Yadong Chen,Chang Shu,Chenying Zhou,Zhenzhen Zhang,Yan Tu,Qiaojie Luo,Xiaodong Li
As the most widely used material for dental tissue repair, dental resin composites face durability challenges, whose longevity critically depends on the hybrid layer's integrity. Incomplete adhesive infiltration within the demineralized dentin matrix (DDM) creates structural defects in this layer, rendering it vulnerable to stress concentration, enzymatic degradation, and bacterial invasion. These factors contribute to secondary caries, the predominant complication of resin-based restorations. Enhancing both adhesive infiltration and the hybrid layer’s antibacterial capacity is thus pivotal to extending restoration lifespan. Previous studies revealed that strong metal ion chelation can mobilize confined water to facilitate hydrophobic monomer infiltration, significantly improving dentin bonding efficacy and durability. In this study, leveraging the dual advantages of Ag⁺—potent chelation and antibacterial activity—we treated DDM with Ag⁺. A brief 20-second application enabled confined water release, enhanced adhesive infiltration, and conferred durable antibacterial functionality to chemically modified DDM. Additionally, matrix metalloproteinases (MMPs) activated during bonding were effectively inhibited. Crucially, subsequent light irradiation reduced Ag⁺ to metallic silver, enhancing structural stability by orders of magnitude. This approach successfully established a low-defect hybrid layer with intrinsic, long-lasting antimicrobial properties. The strategy offers a clinically viable solution for achieving durable dentin restoration with integrated antibacterial defense.
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DOI
PubMed
高影响因子
Desalination and Water Treatment
·
2025
·
IF 1
An Nang Vu,Ngoc – Hoa T. Le,Thanh- My T. Nguyen,Uyen N. Nguyen-Thai,Kim – Phung L. Nguyen,Lan Duc Vu
We present a straightforward method for creating reusable magnetic Fe 3 O 4 /Ag catalysts. Three distinct Fe 3 O 4 varieties were synthesized using different methods, and Ag nanoparticles were deposited onto the Fe 3 O 4 matrix via a hydrothermal process. The resulting Fe 3 O 4 and Fe 3 O 4 /Ag materials were characterized by XRD, XPS, FT-IR, Raman, DLS, FE-SEM, TEM, EDX, VSM, and UV-Vis spectroscopy. XRD analysis of the Fe 3 O 4 particles synthesized using the solvothermal reduction process (S2) revealed firm diffraction peaks, indicating high crystallinity. After hydrothermal treatment, S2/Ag retained a hollow spherical morphology and magnetic properties similar to Fe 3 O 4 . The synthesized Fe 3 O 4 /Ag catalytic performance was evaluated for the reduction of 4-nitrophenol (4-NP) and methyl orange (MO) dye in the presence of NaBH 4 . All catalysts effectively reduced both dyes and could be magnetically separated from the aqueous solution. The P1/Ag catalyst achieved over 95 % reduction of MO and 4-NP within 2 minutes. S2/Ag exhibited superior stability, preventing Ag leaching during the reaction. Furthermore, its high saturation magnetization allows easy magnetic extraction from the solution. These findings strongly suggest S2/Ag as a promising catalyst due to its selectivity and advantageous properties.
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高影响因子
危险品化学品经营许可证（带存储）