TALANTA
·
2019
·
IF 4.916
Tian Jin,Yue Zhang,Yilei Li,Wenjie Jing,Yunchao Li,Louzhen Fan,Xiaohong Li
Due to severely overlapping emission and or/ excitation spectra of polycyclic aromatic hydrocarbons (PAHs), the specifically recognizing PAHs by the fluorescent technique is still a challenge. Here, synthesized Ag@SiO 2 nanoparticles with 40 ± 4 nm Ag core and 7 ± 1 nm SiO 2 shell performing as a nanoprobe could selectively recognize 2-aminoanthracene (2-AA) via metal-enhanced fluorescence (MEF) within 2 min. The sensing mechanism was based on the facts: (1) there was a perfect spectral overlap between the local surface plasmon resonance (LSPR) peak of Ag@SiO 2 and the absorptive peak of 2-AA, and (2) 2-AA could interact with Ag@SiO 2 nanoparticles through hydrogen bonds between –NH 2 in 2-AA and –OH in SiO 2 shell. As a result, with Ag@SiO 2 nanoparticles as a nanoprobe, a fluorescent assay for detecting 2-AA was developed with a linear range from 1 nM to 800 nM, which exhibited an excellent selectivity over possible PAHs, dyes and metal ions . The detection limit was 1 nM. Finally, the developed assay was applied to analyse 2-AA in industrial wastewater samples, which were highly consistent with that of high performance liquid chromatography (HPLC). This study presents a feasible assay for detecting 2-AA for environmental monitoring and toxic evaluating.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xiang Wang,Mengxi Bai,Qiufen Li,Dongze Li,Xiaoyan Lin,Siyuan Shao,Yanting Zhou,Donghui Cai,Yingxin Wu,Ziqi Wang
The increasing demand for high-energy–density batteries has driven intensive research into lithium metal batteries (LMBs) as promising alternatives to conventional lithium-ion batteries. Despite their ultrahigh theoretical capacity, lithium metal anodes (LMAs) suffer from uncontrolled dendrite growth, leading to safety hazards and irreversible capacity loss. Herein, we develop a functional separator based on a composite of Ag nanoparticles (NPs) and metal–organic frameworks (MOFs) to enhance LMA stability. The –NH 2 groups in MOFs promote Li + desolvation and transport, while Ag NPs induce the in-situ formation of a Li-Ag alloy interphase, effectively suppressing dendrite growth and improving interfacial lithiophilicity. As a result, the reversibility and Li plating/stripping kinetics of LMAs are significantly enhanced. The Li symmetric cells exhibit an ultralong lifespan of 2000 h at 0.2 mA cm −2 and 1000 h at 0.5 mA cm −2 . Moreover, the Li||LiFePO 4 full cell retains 93.3 % of its initial capacity after 2000 cycles at 1C and maintains 45 mAh g −1 even at an ultra-high rate of 15C.
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高影响因子
TALANTA
·
2025
·
IF 6.1
Lin Liu,Lin Hao,Wei Shen,Xinjian Yang,Yufan Zhang
This study presents the innovative design and synthesis of rice-stick-like Ag/polyoxometalates/nitrogen-doped carbon nanotubes (Ag/POM/N-CNTs) using an efficient and mild reduction method. N-CNTs are first synthesized through a self-degrading template method followed by the carbonization of polypyrrole nanotubes (PPy-NTs). The N-CNTs exhibit excellent characteristics, including a high length-to-diameter ratio and an interconnected nanotube structure, which shorten the electron transport distance and enhance electrochemical properties. During the process of loading Ag nanoparticles (Ag NPs) onto the N-CNTs, POM serves as both a reducing and linking agent. The synergistic effect between Ag species and N-CNTs significantly improves the catalytic performance of the nanohybrids. As a result, the Ag/POM/N-CNT-based electrochemical sensor demonstrates exceptional performance in adrenaline detection, with a broad linear range (0.40–700 μM), a low detection limit (0.30 μM, S/N = 3), and a sensitivity of 3.13 μA μM −1 . In addition to these advantages, the composite material also exhibits excellent specificity and stability, strongly indicating the practical application potential of Ag/POM/N-CNTs in adrenaline detection.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Baoxia Xue,Ziyang Shao,Jing Liu,Yong Liu,Mei Niu,Yongzhen Yang,Li Zhang
Aerogel dressings aid wound healing with exudate management. Although burn wound dressings have advanced, creating a low-cost option with exudate-absorbing, antimicrobial, hemostatic, and pro-healing properties remain vital. To achieve the anti-biofilm, hemostatic and anti-inflammatory with multiple effects, a multi-functional reduced graphene oxide/polydopamine/silver/cotton gauze (rGO/PDA/Ag/COT) dressing was designed by integrating the rGO/PDA/Ag aerogel with cotton gauze (COT) under the force of the C N bond. The dressing exhibited excellent biosafety (hemolysis rate < 5 %, cell viability >85 % on HUVEC cells), inhibited biofilms of E. coli and S. aureus by 98.66 % and 98.13 %, respectively (at 18 mg/mL extract), reduced hemostasis time by 25 % (322 ± 3.5 s vs. 427.5 ± 10.6 s for COT), and achieved a 91.93 ± 1.97 % wound closure rate in a rat deep second-degree burn model after 14 days. Because of antioxidant properties of PDA, the dressing effectively inhibited the production of inflammatory cells, upregulated TGF-β1 to promote VEGF expression, and enhanced the activity of VEGF and bFGF to stimulate endothelial cell and capillary formation in the burns healing. Given its numerous advantages, the rGO/PDA/Ag/COT dressing shows great potential for application in wound management and therapy.
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DESALINATION
·
2025
·
IF 9.8
Xuyang Liu,Jian Zhang,Huanping Wu,Fuzhi Li,Zhihui Liu,Yingnan Ma,Jianqiang Meng
Membrane fouling significantly limits the application of membrane separation technology in the treatment of textile dyeing wastewater. In this study, a loose nanofiltration membrane made of polybenzimidazole (PBI) with enhanced antifouling and high-efficiency dye/salt separation capabilities was developed through Ag@UiO-66-NH₂ immobilization and hydrophilic polymer brush grafting. Initially, Ag@UiO-66-NH₂ nanoparticles, possessing antibacterial properties, were incorporated into the PBI base membrane. Subsequently, a brush-like antifouling layer was constructed on the membrane surface by grafting linear polypropylene glycol (PPG) and polyethylene glycol (PEG). Experimental results revealed that the grafting modification substantially improved the membrane's performance: the rejection of the small-molecule dye Methyl Red increased from 16.8 % to 59.6 %, and the membrane surface hydrophilicity was enhanced, leading to a slight improvement in pure water flux. Additionally, the grafted layer effectively suppressed the adsorption of bovine serum albumin, with a flux recovery rate remaining above 90 % after four fouling cycles. Furthermore, the membrane exhibited rejection of <10 % for inorganic salts (Na 2 SO 4 , NaCl, MgSO 4 and MgCl₂), achieving efficient separation of dyes and salts. In tests with simulated textile dyeing wastewater, the membrane's rejection for industrial dyes remained stable at over 90 %, and the addition of surfactants and auxiliaries had no significant impact on its performance. This study shows that the combination of immobilizing MOF nanoparticles with controlled release properties of biocides and grafting hydrophilic polymer brush can effectively improve the separation efficiency and antifouling performance of the membrane, which provides a new method for the treatment of complex textile printing and dyeing wastewater.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Xishun Peng,Yiheng Yuan,Anjiang Lu,Cunwei Wang,Caizhen Zu,Haili Zhang,Zhongchen Bai
Glyphosate (Gly) residues in agricultural products have a serious health risk, so it is urgent to seek a sensitive and convenient method for recognizing Gly residues in food. In this study, we proposed an electrochemical surface-enhanced Raman spectroscopy (EC-SERS) sensor of polyaniline/reduced graphene oxide/Ag/Cu (PANI/RGO/Ag/Cu) film to detect Gly residues. The EC-SERS sensor of PANI/RGO/Ag/Cu film had a large specific surface area, which could increase the binding sites of cu 2+ /Gly clathrates for boosting specifically its SERS signal. Moreover, Ag/Cu nanoparticles on the surface of film could effectively increase the differential pulse voltammetry signal and SERS signal of Gly molecules. The limit of detection of EC-SERS sensor to Gly could reach 1.9 nM. In addition, the EC-SERS sensor we prepared could also sensitively identify Gly residues on fresh fruit peels. The PANI/RGO/Ag/Cu film we proposed in this paper has great potential for selective and accuracy detecting Gly residues in agricultural products.
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COMPOSITES COMMUNICATIONS
·
2021
·
IF 6.617
Yong-sheng Zhang,Mao Wang,Cheng Yang,Yao-wen Shao,Xiao-dong Qi,Jing-hui Yang,Yong Wang
Interfacial polarization between fillers and polymer matrix in polymer composites would be responsible for enhancement of dielectric constant ( ε ˊ ), but the dielectric mismatch between fillers and polymer also leads to an undesirable electric breakdown. Herein, we successfully developed a core-shell structured barium titanate@silver (BaTiO 3 @Ag, BT@Ag) novel heterogeneous fiber via coaxial electrospinning followed by calcination technology, to simultaneously improve the dielectric property and breakdown strength ( E b ) of poly(vinylidene fluoride) (PVDF)-based composites. Dielectric measurement reveals that PVDF/BT@Ag composites have an enhanced ε ˊ , low dielectric loss (tan δ) and moderately increased E b . Since the core-shell structured fibers help in tailoring the local electric field around the interface, but also provide double interfacial polarization, which effectively improves the dielectric properties of the composites. When the loading of BT@Ag reached up to 10 wt%, the ε ˊ increased to 19.4 @1 kHz while the E b had maximum value of 389.1 MV/m, finally resulting in an improvement of U e . Moreover, the incorporation of BT@Ag obviously improves the mechanical properties of composites. It is expected that these results would further inspire the design of fillers with novel architecture for high-performance dielectric polymer composites.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yue Mao,Borong Yu,Huijiao Zhang,Yuanyuan Ma,Fangwei Han,Binbin Zhou,Lili Yang,Zhangang Han
The work reported on the preparation of expanded graphite (EG) coupled with Ag nanoparticles for quick water contaminant adsorption, followed by trace molecules sensing using SERS technique. The surfactant-free composites of Ag/EG were obtained by a simple and controllable “mix-and-heat” mechanochemical method. Most of the analytes were found to be adsorbed within 15 min without any additional physical or chemical activation and its adsorption behavior at room temperature fitted pseudo-second-order kinetic models. As SERS enhanced substrate, less than 10 ppb of crystal violet (CV) and methylene blue (MB) could be determined via Ag/EG. What’s more, the Ag/EG substrate could adapt to strong acid and alkali environment and could be stored for as long as 120 days. Therefore, the composites Ag/EG could be used as a reliable SERS active substrate. Moreover, the substrate could be reused at least four times. In addition, ‘adsorption-filtration’ was conducted through a homemade filter and the filter membrane was employed as substrate support instead of silicon wafers. Such results reveal that Ag/EG as a solid SERS substrate has great potential value for practical applications. And the study provides a new strategy for the development of high-performance sensing of the target analyte in the future.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jian Zhao,Zhuo-Hao Jiao,Sheng-Li Hou,Yue Ma,Bin Zhao
Carboxylative cyclization of propargylic alcohols with CO2 is significant in synthetic chemistry, but harsh conditions are often needed according to reported results. Herein, a new stable nitro-functionalized metal–organic framework (MOF) of {[Co3(L)2(bpy)4(H2O)2]·DMF·H2O·bpy}n (1) was fabricated through the solvothermal reaction, which exhibited excellent stability in acid and basic solutions. Owing to the porous structure, unsaturated metal sites, and uncoordinated 4,4′-bpy ligands, 1 can serve as an excellent platform for catalytic applications. Hence, Ag(I) ions were incorporated in 1 through a postsynthetic method, and the as-synthesized Ag-1 catalyst with low metal loading (0.64 mol %) displayed excellent catalytic performance in the chemical fixation of CO2 with alkynols under room temperature and atmospheric pressure. The results of 1H NMR analyses further confirmed that Ag-1 can efficiently activate hydroxyl groups and promote the reaction. Moreover, the turnover frequency (TOF) of the Ag-1 catalyst can reach 262 h–1 in a short period of time, which is a high TOF value among the state-of-the-art MOF-based catalysts for catalyzing cycloaddition of CO2 with propargylic alcohols.
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JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 4
·3587-3591
·
IF 1.338
Wang Qinghua,Gao Xuechuan,Zhang Renfei,Shen Beibei,Tan Zhibing,Li Zhao,Yu Shiyong
Visible-light photocatalyst of TiO2/La/Ag nanocomposites were successfully synthesized via the conventional sol–gel method and reducing agent of Ag+. The photocatalytic activities were evaluated by methyl orange (MO) degradation. They have remarkable photocatalytic
activities compared to TiO2-Anatase, which is thanks to the separation of electron–hole pairs by Ag nanoparticles and lanthanum. The products were characterized by a series of techniques such as X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM),
transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and Uv-vis. The results show that spherical nanocomposites have been prepared with the size 300 nm and Ag nanoparticles (∼10 nm) are dispersed uniformly onto the surface of TiO2/La,
which forms TiO2/La/Ag nanocomposites. TiO2/La/Ag nanocomposites have good absorption in the visible region (700 nm > > > 400 nm). The reasons are as follows: (1) the efficient separation of photogenerated electrons and holes of the photocatalysts on the surface
of TiO2/La/Ag nanocomposites and (2) a wide visiblelight photoabsorption range (700 nm > > 400 nm). Therefore, this study may provide some new idea for the rational design and the facile synthesis of composite catalysts with a green, efficient pathway.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Yuting Zhong,Zhirui Wu,Xiaoguang Liu,Ling Li
The combination of multi-metallic alloys and support materials is a promising approach for the design of electrocatalysts. In this study, Pd-M (M = Fe, Sb, Pb, Sn, Ag) bimetallic alloys embedded composites of 2D Ca-based metal–organic framework (Ca-MOF) nanosheets and reduced graphene oxide (rGO) were fabricated by a facile hydrothermal and impregnation reduction method, then applied as ethylene glycol oxidation reaction (EGOR) electrocatalysts. Remarkably, the forward peak current density of the best catalytic performer PdAg@rGO/Ca-MOF is as high as 258.30 mA cm −2 , which is 9.55 times greater than that of Pd/C. It also exhibits the biggest electrochemical active surface area of 3022.51 m 2 g −1 . After 3600 s chronoamperometry test, the retained current density of PdAg@rGO/Ca-MOF is about 87.94 % of the initial current density. These results imply that bimetallic Pd-M@rGO/Ca-MOF have superior electrocatalytic activity and anti-CO poisoning capacity compared to monometallic and Pd/C for EGOR, especially PdAg@rGO/Ca-MOF. The enhanced EGOR performance is due to the combined effect of Pd-M alloys and folded thin layer wrapped nanosheet rGO/Ca-MOF composites.
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Nano Research
·
2015
·Vol. 8
·期 11
·3621-3629
·
IF 7.01
Li Yanrui,Li Leilei,Gong Yunqi,Bai Song,Ju Huanxin,Wang Chengming,Xu Qian,Zhu Junfa,Jiang Jun,Xiong Yujie
A Z-scheme is a promising approach to achieve broad-spectrum photocatalysis. Integration of TiO 2 with another semiconductor with a band gap of ∼1.0 eV would be ideal to harvest both ultraviolet and visible-near infrared light for photocatalysis; however, most narrow-bandgap semiconductors have straddling band structure alignments with TiO 2 , constituting an obstacle to forming the Z-scheme for photocatalytic hydrogen production. In this communication, we demonstrate Ag 2 S as a model system where the energy band upshift of the narrow-bandgap semiconductor that shares an interface with a metal can overcome this limitation. To fabricate the design, we developed a unique approach to synthesize Ag 2 S–Ag–TiO 2 hybrid structures. The obtained ternary hybrid structures exhibited dramatically enhanced performance in photocatalytic hydrogen production under full-spectrum light illumination. The activities were significantly higher than the sum of those of Ag 2 S–Ag–TiO 2 structures under λ < 400 nm and λ > 400 nm irradiation as well as those of their counterparts under any light illumination conditions.
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