APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jiawei Wang,Ruirui Qiang,Qiaowei Miao,Ruiling Hu,Huihui Chen,Shaobo Guo,Zhifeng Liu
With antibiotic resistance on the rise due to misuse, the urgent need for new antibacterial materials has become paramount in global health. Herein, a CuFe 2 O 4 /MoS 2 (CFM) composite with a large specific surface area was synthesized through a simple hydrothermal method and physical adsorption, and the subsequent loading of silver nanoparticles (Ag NPs) onto its surface yielded the nanocomposite CuFe 2 O 4 /MoS 2 @Ag (CFMA) with a rough defect-rich surface. The nanocomposite demonstrates remarkable antibacterial activity against Escherichia coli , Staphylococcus aureus , and drug-resistant Salmonella ( T-Salmonella ) by releasing metal ions that alter the electrical potential of bacterial cell membranes, compromise the integrity of cell membranes, and produce reactive oxygen species that lead to oxidative stress. It thus achieves an antibacterial rate of 96 % against the three tested bacterial strains within just 20 min at a concentration of 200 μg/mL. The composite exhibits a broad-spectrum antibacterial effect against Gram-negative and Gram-positive bacteria, as well as drug-resistant bacteria. Moreover, CFM acts as a carrier that effectively prevents the aggregation of Ag NPs, and the magnetism of CuFe 2 O 4 facilitates the recovery of the antibacterial agent. This work provides new ideas and methods for the development of highly efficient, cost-effective, and biocompatible antibacterial materials.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yi-Hong Yu,Xin Cui,Yi-Meng Hong,Gao-Wu Qin,Song Li
Incorporating electrochemical CO 2 reduction (ECR) that produces CO-rich syngas into the workflow of steelmaking presents a promising strategy to neutralize the steelmaking industry. Herein, we develop a highly efficient and stable Ag nanowires with surface CeO 2 armors (CeO 2 /AgNWs) as ECR electrocatalyst for syngas production. The engineered CeO 2 -Ag interface facilitates CO 2 -to-CO conversion by lowering the energy barrier for *COOH intermediate formation through synergistic electronic effects. At an industrially relevant current density of −251.3 mA cm −2 , the CeO 2 /AgNWs generate CO-rich syngas by co-electrolysis of CO 2 and H 2 O, with a high Faradaic efficiency (FE) of 92.1 % for CO. Techno-economic analysis (TEA) reveals that integrating the CeO 2 /AgNWs-driven ECR into existing steelmaking workflows can potentially reduce CO 2 emissions by 83 % and elevate the renewable energy utilization to ∼91.4 %, unlocking new possibilities for achieving carbon neutrality in the steel industry.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Ziyu Liu,Huanrui Liu,Daofu Zhang,Yongsheng Li,Fangfang He,Zhuoni Jiang,Hongxia Yang,Xinghua Zhu,Wenbin Yang
By intelligently modulating the thermal energy exchange between the skin and the environment, phase change fabrics are important for improving the thermal comfort of the wearer, saving energy, and expanding the functionality of smart textiles. In this study, paraffin@SiO 2 @Ag phase change microcapsules (M s ) were tightly encapsulated in calcium alginate (CA) matrix using wet spinning process. CA/M s phase change composite fibers with different mass ratios were designed. When the CA/M s mass ratio was 1:1, the CA/M s phase change enthalpy ΔH m was 64.3 J/g, and the maximum tensile strength was 1.27 MPa, along with excellent thermal stability and photothermal conversion efficiency. In addition, the introduction of different contents of carbon nanotubes (CNTs) into CA/M s could improve the thermal conductivity and photothermal conversion efficiency. When the cont1ent of CNTs was 10 phr, the thermal conductivity of CA/M s /CNTs (CMC) was increased by 159 %. Therefore, these phase change composite fibers with excellent photothermal efficiency offer new possibilities for the exploitation of smart fabrics and are anticipated to have a significant role in the area of smart textiles.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yan Wang,Shengzhe Zhao,Yi Yang,Raul D. Rodriguez,Anya Lipovka,Yun Lu,Honglan Huang,Jinju Chen
Ag nanoparticle-decorated Bi 2 O 3 -TiO 2 heterogeneous photocatalysts were successfully obtained by combining facile sacrificial templates and photoreduction . The as-synthesized Ag@Bi 2 O 3 -TiO 2 photocatalysts with a narrow band gap of 2.40 eV exhibited considerable photocatalytic activity to degrade rhodamine B (RhB) and tetracycline hydrochloride (TCH), and the removal efficiency reached 100% and 92%, respectively. Ag@Bi 2 O 3 -TiO 2 photocatalysts also exhibited stable recyclability for the degradation of RhB and TCH. Trapping experiments helped determine the major reactive oxidative species for TCH photodegradation . The desirable photodegradation performance is mainly attributed to improved light absorption , enhanced charge separation, and strong redox capacity of Ag@Bi 2 O 3 -TiO 2 nanostructures with S-scheme heterojunction . This work provides a facile avenue to construct heterogeneous tubular nanostructures with intensive photoabsorbance and effective photocatalysis to degrade organic contaminants.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Na Xiao,Jiang Xue Dong,Shi Gang Liu,Na Li,Yu Zhu Fan,Yan Jun Ju,Nian Bing Li,Hong Qun Luo
Selective and sensitive detection of multiple metal ions is significant for biological researches and environmental monitoring, because the abnormal metal ions levels have potential damage to the human body and environment. In this study, a fluorescent sensing platform based on Ag nanoclusters has been established for independent detection of Hg 2+ , Cu 2+ , and Fe 3+ ions in a solution. The interference of the fluorescence induced by coexistent metal ions was removed by altering buffers with different pH and using different masking agents. Moreover, the detection mechanism is discussed in detail, which provides a valuable reference for the detection of heavy metal ions with metal nanomaterials. This sensor exhibits a high selectivity and sensitivity, and the linear ranges for Hg 2+ , Cu 2+ , and Fe 3+ detection are 0.05-9, 0.05-18, and 0.1–18 μM with the corresponding detection limits of 12, 27, and 50 nM, respectively. Furthermore, this method was successfully used for analyzing the three metal ions in environmental and biological samples.
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Nanoscale
·
2022
·Vol. 14
·期 47
·17550-17560
·
IF 8.307
Yunpeng Lin,Jinyong Hu,Wenbo Zhang,Li Jiang,Deqi Yi,Thitima Rujiralai,Jie Ma
Dimer optical antennas (OAs) enable great fluorescence enhancement and excitation volume reduction and hence potentially can be a very useful tool for single-molecule detection. The realization of broadband fluorescence enhancement with a dimer OA remains an essential step for its usage in multi-color single-molecule fluorescence (SMF) detection. Although silver dimer OAs have been shown to be able to yield broadband fluorescence enhancement over the visible spectrum, they are amenable to oxidization, hard to functionalize, and could cause cytotoxicity. To overcome these limitations, in this work, we took advantage of nano-sized silver due to its optical properties and gold due to its chemical properties and developed an ameliorated Ag@Au dimer OA in terms of its overall performance. The Ag@Au nanoparticle in the dimer OA contains a 70 nm silver core and an ultra-thin (∼1–5 nm) gold shell which play a key role in its optical responses. Furthermore, we employed three typical dyes, i.e., FAM, TAMRA and Cy5, representing the blue, yellow and red ranges, respectively, and characterized their single-molecule fluorescence enhancements in the presence of Au or Ag@Au OAs. Our results indicate that, in contrast to its Au counterpart, the Ag@Au dimer OA prepared here can greatly improve its optical response in the blue range and eventually achieve broadband fluorescence enhancement throughout almost the whole visible spectral range. Meanwhile, it also maintains good chemical stability and accessibility to functionalization. Such Ag@Au dimer OAs are thus expected to have many important applications in the future, including single-molecule sequencing and multi-color biosensing.
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PubMed
高影响因子
POLYMER TESTING
·
2021
·
IF 4.282
Youmei Du,Dequan Ma,Jie Mao,Jianqi Yao,Qin Ma,Jing Lu,Faliang Luo,Chunhui Luo,Lei Li
In the current work, the polypropylene composites filled with a M-T-ZnOw@Ag filler with antibacterial and antistatic properties was firstly synthesized. The composites and the fabricated nanocomposites were characterized using SEM, TEM, XRD, FTIR and XPS techniques. With the addition of M-T-ZnOw@Ag, the antibacterial and antistatic properties of composite materials are greatly improved by the synergistic effect of AgNPs and T-ZnOw. When the filler content is 10 wt%, the antibacterial activity of the composite material against Gram negative ( Escherichia coli ) and Gram positive ( Staphylococcus aureus ) bacterial were 100%. And the surface resistivity was reduced to 5.5 × 10 10 Ω, fell by nearly 7 orders of magnitude compare with the neat PP. Furthermore, the composites showed better mechanical properties . The maximum impact strength of the composites is 56.3% higher than the neat PP. We believe the composite material with antibacterial and antistatic properties could greatly expand the application range of polypropylene materials.
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SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Lixuan Ren,Yanzhen Zhao,Liu Yang,Wenling Cao,Huifang Wang,Xiaojie Lian,Xianghua Gao,Baolong Niu,Wenfeng Li
The bacterial infection is one of the main reasons for the failure of implant surgery. In this paper, catechol functionalized chitosan (CSCT) was used as a reducing agent and stabilizer to synthesize CSCT-Ag NPs. The composite coating of titanium surface was then electrodeposited by a CSCT layer initially, followed by spin-coating of a CSCT/gelatin (G)/CSCT-Ag NPs layer. The results of XRD , UV–Vis, and TEM showed that the silver nanoparticles were successfully synthesized with uniform distribution, and the particle size was 4–22 nm. The cytotoxicity test results of CSCT-Ag NPs on A549 and EA.Hy926 cells showed when the concentration of CSCT-Ag NPs was less than 25 μg/mL, the survival rate of the two kinds of cells was greater than 80%. First electrodeposition and then spin-coating is feasible through the coating adhesion test and the adhesion level up to 5B. Compared with the pure Ti substrate, the corrosion resistance and hydrophilicity of the composite coating surface are significantly improved. The antibacterial rate of the composite coating against E. coli and S. aureus can reach 99% and 96%. In conclusion, CSCT-Ag NPs and the method of preparing coatings by electrodeposition and then spin-coating have good clinical application potential.
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ChemNanoMat
·
2021
·Vol. 8
·期 1
·e202100357
·
IF 3.154
Bei Liu,Yafang Liu,Jinglei Qin,Hongshang Peng
Graphical A nonchemotherapic antibacterial agent was synthesized through one-step reprecipitation-encapsulation of photosensitizers, photothemal agents and poly-L-lysine (PLL), followed by the in-situ reduction of Ag on the surface of nanoparticle. The fabricated nanohybrids achieved a robust PDT/PTT/Ag antibacterial capability without apparent systemic toxicity. Considering the implications of inherent resistance of pathogenic bacteria, it is important to design a new generation of nonchemotherapic nanoagents for effective antibacterial therapy. Herein, we illustrate a one-step reprecipitation-encapsulation strategy to incorporate hydrophobic photosensitizers (ZnPc) and photothemal agents (dopamine hydrochloride) with a cationic poly-L-lysine (PLL) layer. Upon light irradiation, the polymeric nanohybrid exhibits high photo-to-thermal conversion efficiency (30.3%) and effective 1 O 2 generation capability. To further enhance the antibacterial efficiency, Ag nanoparticle, a typical broad-spectrum antibacterial agent, was decorated on the surface of PLL layer by in-situ reduction. The as-synthesized nanohybrids, referred to as ZnPc/DA@Ag, achieved a robust photodynamic/photothermal/Ag antibacterial capability without apparent systemic toxicity, thus holding great potential for broad-spectrum eradication of pathogenic bacteria.
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Catalysis Science & Technology
·
2022
·Vol. 12
·期 5
·1628-1636
·
IF 6.177
Peng Gao,Peng Wang,Xiaolei Liu,Zihao Cui,Yaqiang Wu,Xiaohan Zhang,Qianqian Zhang,Zeyan Wang,Zhaoke Zheng,Hefeng Cheng,Yuanyuan Liu,Ying Dai,Baibiao Huang
Dry reforming of CH4 by photothermal catalysis is considered to be a promising approach to produce syngas. It can not only store useful chemical energy, but also consume CO2 and CH4 to mitigate the greenhouse effect. Herein, we anchor Ag/AgBr on CsPbBr3 through an in situ ion exchange route to construct a composite material, which exhibits an excellent photothermal synergistic effect in the dry reforming of CH4. The CO production rate of the 7 wt% Ag/AgBr/CsPbBr3 composite through photothermal catalysis is 456.15 μmol g−1 h−1, which is approximately 79 times and 195 times higher than that through pure thermal catalysis and pure photocatalysis, respectively. Moreover, the CO production rate of 7 wt% Ag/AgBr/CsPbBr3 is 7.25 times higher than that of pristine CsPbBr3. The mutual promotion of the thermochemical and photochemical processes significantly improves the energy utilization efficiency and reaction kinetics, leading to high photothermal catalytic efficiency. This work indicates that the inorganic halide perovskite shows excellent photothermal catalytic activity, and provides an alternative way to extend the application range of perovskite materials.
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Materials Science & Engineering C-Materials for Biological Applications
·
2020
·
IF 5.88
Xiaoyu Huang,Lin Chang,Youguang Lu,Zhanhai Li,Zewen Kang,Xiaohui Zhang,Minghuan Liu,Da-Peng Yang
Advances in nanotechnology provide plenty of exciting solutions to environmental issues affecting air, soil as well as water. To solve the water pollution problem caused by organics and microorganisms, development of a simple, environment-friendly, and cheap method for the synthesis of nanomaterials is of paramount importance. Herein, we prepared a novel nanocomposite (named Eggshell/Ag) using waste eggshell as a support and Cacumen platycladi extract as reducing and stabilizing agents in aqueous solutions at room temperature. Biogenic-stabilized Ag nanoparticles (Ag NPs) with an average diameter of 60 nm were well-dispersed on the surface of eggshells, exhibiting dual-functional properties of organics catalytic degradation and bacterial growth inhibition. Through five repeated assays, it was established that the reduction efficiency of the nanocomposite for 4-nitrophenol (4-NP) was high. The reduction could be completed rapidly at room temperature. Moreover, significant inhibition zones were observed for Staphylococcus aureus ( S. aureus ) agar plates and Escherichia coli ( E. coli ). Meanwhile, the minimum inhibition concentrations (MIC) were determined to be 0.08 and 0.04 mg mL −1 , respectively, while the minimum bactericidal concentration (MBC) was measured as 0.64 mg mL −1 . The biogenic Eggshell/Ag nanocomposites are promising candidates for a series of applications in the fields of biomedicine, environment as well as energy.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Hui Xu,Yunfang Huang,Dan Luo,Xiaomin Yang,Shao Jin,Qiyao Guo,Yuezhu Zhao,Yu Fang,Yuelin Wei,Jihuai Wu
In this work, multiple heterojunction Ag/Bi/BiOCl 0.8 Br 0.2 photocatalysts with novel porous micro-flower structure were fabricated via a facile one-step solvothermal route and characterized systematically. The TEM and HRTEM images clearly showed the heterogeneous nanostructures at the interface between Ag/Bi and BiOCl 0.8 Br 0.2 . The as-prepared Ag/Bi/BiOCl 0.8 Br 0.2 composites displayed a strong optical absorption in the region of 250–1500 nm, especially in the unexploited near infrared region which accounts for most of the sunlight. The multiple heterojunction photocatalyst exhibited an outstanding photocatalytic activity for the degradation of Rhodamine B under the UV, visible and NIR light irradiation, respectively. The highly enhanced photocatalytic activity was attributed to the synergistic effects, including the reduced band gap, the surface plasmon resonance effect, efficient charge separation of photo-generated electron-holes. On the basis of the radical species trapping experiments, the holes and superoxide radicals were confirmed to be the mainly active species involved in the degradation of Rhodamine B under the NIR light irradiation. This study provides a novel strategy for designing highly performance plasmonic photocatalysts under the whole solar light irradiation.
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