ChemistryOpen
·
2024
·
IF 2.5
Dam Xuan Thang,Nguyen Thuy Chinh,Nguyen Thi Binh Minh,Trinh Hoang Nghia,Thai Hoang
Graphical This study focuses on a green synthesis of Cu 2 O and Cu 2 O−Ag particles using ascorbic acid (LAA) as a reducing agent in the presence of two surfactants, polyethylene glycol 6000 and sodium dodecyl sulfate. The hybrid materials exhibit strongly antibacterial activity and are potential for the application in the acrylic emulsion coating. Nanomaterials based on metal oxides, especially Cu 2 O, have received much attention in recent years due to the many unique properties of the surface plasmon resonance they provide. The report presented the co-precipitation method, a simple preparation method to produce Cu 2 O oxide particles. In addition, to improve the unique antibacterial properties of Cu 2 O, a proposed method is to attach Ag nanoparticles to the surface of Cu 2 O particles. The Cu 2 O and Cu 2 O−Ag particles were synthesized based on redox reactions using ascorbic acid (LAA) as a reducing agent. Moreover, in this experiment, two surfactants, polyethylene glycol 6000 (PEG 6000) and sodium dodecyl sulfate (SDS), were added during the manufacturing process to create particle samples and particle combinations with better properties than the original sample. Changes in the characteristics and properties of particle samples are determined by many different physical and chemical methods such as ultraviolet-visible spectroscopy (UV-Vis), infrared spectroscopy (IR), noise X-ray radiation (XRD), scanning electron microscope (SEM), dynamic light scattering (DLS), energy dispersive X-ray spectroscopy (EDS), and transmission electron microscopy (TEM). Finally, the activity against bacteria, including E. coli and S. aureus , was also tested using the agar well diffusion method to determine the zone of inhibition. The results improved the particle size value, which decreased by half to 200 nm when two additional surfactants, PEG and SDS, were added. In addition, the antibacterial ability has also been shown to increase significantly when the diameter of the bacterial inhibition zone increased significantly, reaching values of 20 mm (Cu 2 O/Ag/SDS) and 32 mm (Cu 2 O/Ag/PEG) for the E. coli bacterial strain. The initial test sample was only about 14 mm in size. The S. aureus bacterial strain also had a similar improvement trend after adding Ag to the Cu 2 O surface with the appearance of two surfactants, SDS and PEG. The inhibition zone diameter values reached the optimal value at 36 mm in the Cu 2 O/Ag/PEG particle combination sample compared to only the initial 26 mm in the Cu 2 O particle sample. Finally, the particle samples are added to the acrylic emulsion paint film to evaluate the changes. Positive results were obtained, such as improvement in adhesion (1.22 MPa), relative hardness (240/425), and sand drop resistance (100 L/mil) in the Cu 2 O/Ag/PEG particle combination sample, which showed the correctness and accuracy of the research.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Jie Yu,Dan Zhu,Cong Qi,Wenjie Zhang,Lin Liang
To improve the ability of the medium to capture solar energy, Ag@Fe 3 O 4 core-shell nanoparticles (NPs) were prepared in this paper. The influences of different preparation conditions on the particle structure and photo-thermal properties were investigated, and the growth and spectral absorption properties of Ag@Fe 3 O 4 NPs were analyzed. At the same time, nanoparticles-modified carbon membranes (NPCMs) were prepared by electrostatic adsorption method. The influences of radiation intensity and preparation concentration on photo-thermal properties were investigated, and the local evaporation mechanism of NPCMs was deeply explored. Experiments showed that changing the molar ratio of the precursor can effectively regulate the structure and optical properties of the NPs. The increase of the core radius of the NPs will increase the electric field strength ( E ) of the core surface and promote the absorption of light. Optimizing the temperature and heating time of the preparation process is very important for the successful realization of Fe 3 O 4 coated Ag, while deepening the coupling between plasmons on the surface of adjacent NPs. Compared with the intensity of 5 sun, the evaporation efficiency at 2 sun is increased by 13.37%. The local evaporation effect caused by NPCMs makes the system still have good evaporation efficiency at low radiation intensity.
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International Journal of Nanomedicine
·
2024
·
IF 6.6
Guoqiang Xu,Xiaona Song,Xiaotang Wang,Rui Xue,Xiaoru Yan,Litao Qin,Xiaoqi Chang,Jiping Gao,Zhaoyang Chen,Guohua Song
Purpose Oral squamous cell carcinoma is the most common type of malignant tumor in the head and neck region. Despite advancements, metastasis and recurrence rates remain high, and patient survival has not significantly improved. Although miRNA therapies are promising for cancer gene therapy, their applications in treating oral cancer are limited. Targeted medication delivery systems based on nanotechnology offer an efficient way to enhance oral cancer treatment efficacy.Methods We synthesized nanosilver (AgNPs) and loaded them with the tumor suppressor miR-181a-5p. In vitro experiments were conducted to investigate the inhibitory effects of AgNPs and their composites on the malignant behavior of oral cancer cell lines. The xenograft experiment was utilized to examine their effects on tumorigenesis and the potential molecular mechanisms involved.Results The nanosilver exhibited a spherical morphology with a size distribution ranging from 50 to 100 nm. They exhibited a distinct absorption peak at 330 nm and could be excited to emit green fluorescence. The biocompatible AgNPs effectively shielded miRNA from degradation by RNase and serum. The nanocomposites significantly inhibited the proliferation, invasion, migration, and colony formation of oral cancer cell lines. Notably, treatment with the nanocomposites resulted in substantial tumor growth suppression in the xenograft model. Mechanistically, these composites directly targeted BCL2 and exerted their antitumor effects by suppressing the β-catenin signaling pathway and other downstream genes without inducing acute toxicity.Conclusion Collectively, the findings demonstrate that the miR-181a-5p/AgNPs combination significantly impedes the growth and progression of oral cancer both in vitro and in vivo, highlighting a pivotal role for the β-catenin signaling pathway. This multifaceted approach holds promise as a prospective therapeutic strategy for oral cancer management in the future.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
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IF 5.8
Yijiao Zhang,Yanming Wang,Haiying Huo,Pu Zhang,Xiaoliang Zhang,Hongwei Che,Jingbo Mu,Zhixiao Zhang,Ping Li,Chunxia Wu
A 2D/1D/0D ternary heterostructure was fabricated that combined the accumulative merits of each component to exhibit superior performance through synergistic effects. This study adopted a strategy based on integrating 2D MXene, 1D tubular MnO 2 , and 0D Ag nanospheres into one electrode to obtain a ternary heterogeneous layered structure composite electrode. Utilizing the collaborative and intensive outcomes from MXene, MnO 2 , and Ag, the resulting MXene/MnO 2 /Ag composite electrode achieved an exemplary specific capacitance of 880.8 F g −1 at 2 A g −1 . In this study, an asymmetric supercapacitor (ASC) was developed and fabricated using the MXene/MnO 2 /Ag composite for the anode, commercial activated carbon as the cathode. Consequently, in a two-electrode setup, the resulting devices displayed an admirable specific capacitance of 112.5 F g −1 at 3 A g −1 . After being cycled 5000 times, the device maintained 85.0 % of its original capacitance under charge-discharge conditions. Furthermore, the ASC device demonstrated a pronounced energy density of 39.9 Wh g −1 during cycling with a corresponding power density of 2955.8 W kg −1 . These results showed that the dimensionally combined MXene/MnO 2 /Ag nanoarchitectonic electrodes offered considerable application potential for enhancing energy storage in supercapacitors.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Jiemei Yu,Chengchun Tang,Weimin Zhang,Zhankun Jiang,Lei Qi,Yanlu Mu,Taizhong Huang,Xueying Zhu
Cost-effective, earth-abundant and high electroactive bi-functional electrocatalyst for ORR (oxygen reduction reaction) and OER (oxygen evolution reaction) is desirable for developing sustainable energy systems such as fuel cells, electrolyzers and metal-air batteries . In this work, Ag nanoparticles were first deposited on h-BN sheets via a simple complexation-reduction method, by using carbon nanotube as the conductive material . The structure, morphology and composition of obtained Ag-BN/C catalyst were characterized by XRD (X-ray diffraction), SEM (scanning electron microscopy), EDX (energy-dispersive X-ray), Raman, TEM (transmission electron microscopy) and XPS (X-ray photoelectron spectroscopy). These tests confirmed the presence of Ag on the h-BN support and tightly binding together by carbon nanotubes. Ag-BN/C shows improved ORR electrocatalytic activity which is comparable to that of Pt/C catalyst. The as-prepared catalyst also exhibits excellent OER catalytic activity. The long-time running and the tolerance to methanol studies show that the Ag-BN/C catalyst possesses high stability properties in alkaline medium. This investigation may provide technical and theoretical validation for application in fuel cells.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Zhao-Yun Wang,Xin Zhao,An-Ni Zheng,Lei Jin,Jia-Qiang Yang,Jun-Yang Liu,DongPing Zhan,Da-Quan Yu,Fang-Zu Yang,Shi-Gang Sun
Metallization of micro through silicon via (TSV) is vital in 3-dimensional integration of chips and high-density printed circuit boards. As the diameter decreases and aspect ratio increases, realizing a uniform copper seed layer inside TSV becomes increasingly challenging by using traditional techniques of high-cost physical vapor deposition (PVD) and chemical vapor deposition (CVD). Cu electroless deposition (Cu-ELD) is a promising technique for growing a conductive seed layer on the wall of TSV, and promotes the completion of metallization of micro TSV following by Cu electroplating. In the current study, an advanced method is developed to form Cu seed layer on micro TSV by Cu-ELD catalyzed through Ag nanoparticles. The Ag nanoparticles are synthesized using gallic acid as the reducing agent (denoted as GA-Ag NPs). Ultraviolet–visible absorption spectroscopy and transmission electron microscopy are applied to study the mechanism of conformal Cu-ELD catalyzed by GA-Ag NPs, and results demonstrate that all Ag ions are reduced to spherical Ag NPs of 9.7 nm in average size. Electrochemical tests and finite element simulation illustrate that the high catalytic activity of GA-Ag NPs facilitates Cu-ELD to achieve an effective conformal deposition in TSV. The obtained continuous and uniform Cu seed layer enables the void-free filling of TSV ultimately by Cu electroplating. An in situ XRD device is designed and built up for investigation of Cu-ELD process, which reveals that the Cu layer catalyzed by GA-Ag NPs during growth is stable and exhibits a mixed crystalline structure with texture coefficient ( TC ) values of Cu (220) and Cu (311) close to and higher than 25 %.
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ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Fenglong Sun,Qian Jing,Tongda Xing,Yue Li,Bolong Jiang,Yang Zhao,Huan Wang
In this study, a Ag/CCN composite photocatalyst with a dragon-fruit section structure synthesized by loading silver nanoparticles (Ag NPs) onto CCN (g-C3N4 modified by M-phenylenediamine), is successfully employed as the photoanode in the H2O2 fuel cell system. Through the optimization of Ag NP loading amount, the 5%-Ag/CCN composite-based fuel cell exhibits a maximum power density of 1.195 mW·cm–2 in an aqueous solution containing 0.1 M HCl under AM 1.5G illumination (1 sun, 100 mW·cm–2), which is about 2.4 times higher than that of the g-C3N4-based fuel cell. The solar-to-electricity conversion efficiency (SECE) of the above fuel cell is further calculated to be 0.886%. Additionally, the 5%-Ag/CCN-based photocatalytic H2O2 fuel cell shows high stability during the charge and discharge process and strong energy storage capacity, along with a specific capacitance of 6860 mF·cm–2 after 2 h of irradiation and a capacitance retention rate of 60.33% even after 6 h of continuous operation. The localized surface plasmon resonance (LSPR) effect of Ag NPs significantly enhances the light capture capability of the photoanode, and the Schottky junction formed at the interface between Ag NPs and CCN effectively suppresses the recombination of photogenerated electrons and holes, promoting the photocatalytic oxidation of H2O to generate H2O2. This study provides a feasible strategy for constructing an efficient photoanode to generate H2O2, further improving the energy conversion efficiency and stability of H2O2 fuel cells.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Dangge Gao,Fangxing Wang,Chi Zheng,Bin Lv,Jianzhong Ma
Cotton textiles with persistent antibacterial qualities are crucial in halting the spread of bacteria and other infections. However, fugitive bacteria and drug-resistant pathogens have rendered tremendous challenges in the development of cotton fabrics with long-lasting antibacterial efficacy. The work aimed to innovatively propose a functional cotton fabric integrating intelligent bacteria-capturing and dual antibacterial properties for efficacious personal health management. The functional cotton fabric was created by modifying the surface of cotton fabric with the quaternized carboxymethyl chitosan (Q-CF) and then covalently grafting the silver@Zr-based porphyrin metal–organic skeleton (Ag@MOF-545) prepared via the “bottle-around-the-boat” method on the surface of Q-CF (AM/Q-CF). In this process, the functional cotton fabric could capture bacteria via positive charges on the surface of the quaternized carboxymethyl chitosan. Due to the synergistic effect of broad-spectrum antibacterial silver nanoparticles (AgNPs) and the visible light-driven antibacterial Zr-based porphyrin metal–organic skeleton (MOF-545), the metabolism of bacteria and drug-resistant strains was well inhibited, which endowed the AM/Q-CF with lasting dual antibacterial properties. After repeated laundering cycles, abrasion cycles, simulated sweat soaking, and long-term storage, the antibacterial rates of AM/Q-CF were over 85%. Altogether, the results provided a potential antibiotic-free alternative for the preparation of durable antibacterial cotton fabrics.
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JOURNAL OF APPLIED PHYSICS
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2024
·Vol. 135
·期 8
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IF 2.7
Xu Xiaoli,Jiang Hongtao,Liu Wangwang,Wang Shengyi,Wang Xiaoping,Wang Mengyu,Ma Wei,Ma Shuyi,Wei Jinsha
It is a novel-effective process for realizing high-efficiency sensing and continuous gas monitoring by introducing precious metals into metal–oxide–semiconductors (MOSs). In this study, Ag is exploited to prepare surface functionalized SnO 2 nanoparticles (NPs) and innovative x Ag@SnO 2 /CsPbBr 3 , activating and catalyzing the gas sensing reactions on semiconductors. The results show that the precious metal Ag NPs promote the directional transport of carriers, thus improving the gas sensing performances. In addition, innovative x Ag@SnO 2 /CsPbBr 3 composites originated from Ag@SnO 2 NPs and 3-mercaptopropionic acid treated all-inorganic perovskite CsPbBr 3 are constructed to further accelerate electron transfer on heterointerfaces, enabling continuous and efficient monitoring of ethanolamine (EA) at room temperature. The sensing properties of Ag@SnO 2 /CsPbBr 3 on various volatile organic compounds are investigated. Compared with pure CsPbBr 3 , the EA response of as-prepared 2Ag@SnO 2 /CsPbBr 3 is obviously improved by about sevenfold. The response/recovery time is greatly shortened, besides the good stability. Another interesting result for x Ag@SnO 2 /CsPbBr 3 is the lower limit of detection of 44.43 ppb. The work demonstrates that Ag modification facilitates the adsorption/desorption rate and the response. Furthermore, the catalytic activation of noble metal Ag NPs and the synergistic interaction of SnO 2 /CsPbBr 3 nano-heterojunctions promote EA sensing performances at room temperature.
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TALANTA
·
2024
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IF 5.6
Cuiyun Kou,Haiguo Hu,Ying Tang,Yiyu Luo,Chenggong Han,Yu Bao,Zhinan Guo,Li Niu
Ag + , as a good bactericidal reagent, has been extensively used to prevent the growth and spread of bacteria and viruses. However, overcommit of Ag + would leave residues in environments, which is toxic to the human body even under minimal exposure. In this case, a fast and high selective sensing method based on field effect transistors (FET) has been proposed for monitoring Ag + in aqueous solutions. Through coordination interaction, Ag + could be spontaneously adsorbed on the surface of the sensing material MoS 2 and affect its electronic carrier transport behavior. The MoS 2 -based FET sensor show outstanding sensing performance to Ag + including short response time (60 s), good linear relationship (R 2 = 0.97), low detection limit (10 −10 mol/L) and high selectivity, which could meet the permissible criterion of Ag + in drinking water by the World Health Organization (0.93 × 10 −6 mol/L). This study will promote the application of FET sensors in environmental analysis, and provide important guidance to realize rapid, on-site or in-situ monitoring of heavy metals in aqueous solutions.
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APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Jianhao Li,Zhicheng Hu,Shuhuan Han,Dapeng Cao,Xiaofei Zeng,Jianfeng Chen
Electrocatalytic CO 2 reduction reaction (CO 2 RR) to multi-carbon product, especially for ethylene (C 2 H 4 ), provides a favorable pathway for carbon neutrality and renewable energy storage. However, the second-order C-C coupling reactions in CO 2 RR need always the high activation/driven energy in dynamics originating from the trace C 1 intermediate product. Herein, we synthesized the Ag-decorated Cu 2 O porous hollow core-shell catalyst named Ag@Cu 2 O where Ag nanoparticles uniformly distributed on inner the surface of the hollow Cu 2 O (H-Cu 2 O) via the sacrificial template method. Benefiting from the synergistic hollow structure and electron transfer from Cu and Ag to O, Ag@Cu 2 O catalyst delivers the excellent C 2 H 4 Faradaic Efficiency (FE) of 55 % ± 2 % at −1.0 V (vs. RHE), which is superior to the most reported catalysts. More importantly, in situ infrared spectroscopy and density functional theory (DFT) calculations reveal the introduction of Ag can decrease the activation energy required for *CO and C-C coupling.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Yaxin Wang,Zhen Xu,Shuangshuang Zhao,Yongjun Zhang,Wei Li,Jiahong Wen,Renxian Gao,Bohong Zheng,Lijun Liang,Xiaoyu Zhao
The Ag nanonail rooted in Au cross-channel nanocavity is fabricated by plasmon-mediated chemical reactions (PMCRs). The Au cross-channel nanocavity is prepared based on two-dimensional polystyrene (PS) nanosphere template through wet etching, and the shape of Au cross-channel nanocavity changes from trapezoidal to triangular, depending on the wet etching time. The growth of Ag nanostructures in Au channels by PMCRs indicates the morphology of Ag nanostructures has changed from Ag nanoparticles to nanonails, which is regulated by the shape of Au nanocavities and the exciting light polarization. The hotspots distributions results in the anisotropic growth of Ag nanostructures induced by PMCRs, which leading to the different Ag nanostructures depending on the shape of Au nanocavity and light polarization, as confirmed by FDTD simulations. In comparison with others reports, our nanocavity provide more parameters to control the shapes of Ag nanostructures, the nanocavity shape, the light polarization and the growth time. Our work provides a profound insight into the construction of periodic nanostructures and reconstruction of hotspots.
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