Catalytic and biocidal activity of silver and gold nanoparticles obtained by green synthesis using aqueous extracts of glossy privet (Ligustrum lucidum) dry fruits

IF 5.3 2区 化学 Q2 CHEMISTRY, PHYSICAL
Daniela L. Bordón , Elisa Herrera , M. Laura González , Laura I. Rossi , Mario L. Aimar , Ana M. Vázquez , Alejandro M. Granados
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Abstract

Metallic nanoparticles (NPs) have gained interest due to their practical applications in various areas. The synthesis of NPs from biomass proposes a simple, economical and environmentally friendly alternative. In this work, gold NPs (AuNPs) and silver NPs (AgNPs) were synthesized from aqueous extracts of dried Ligustrum lucidum fruits. The biomolecules of the extract, in addition to acting as a reducing agent, are absorbed on the surface of the NPs giving excellent colloidal stability, increasing their catalytic capacity reflected in their recyclability. The TON and TOF values obtained for the reduction reaction of 4-nitrophenol in the presence of NaBH4, are 1.4 105 and 500 s−1 respectively. Minimum inhibitory concentrations (MICs) were established for AgNPs using pathogens from certified collections (E. coli MIC = 25 µg/mL; S. aureus MIC = 100 µg/mL). Fractional inhibitory concentration indices (FICIs) in the presence of gentamicin showed synergistic effects (FICI = 0.5). The results demonstrate that the aqueous extract of L. lucidum allows the synthesis of AuNPs and AgNPs, which have attractive catalytic and antimicrobial activities, in a simple and environmentally friendly way.

Abstract Image

利用光面女贞干果水提取物进行绿色合成获得的金银纳米粒子的催化和杀菌活性
金属纳米粒子(NPs)因其在各个领域的实际应用而备受关注。从生物质中合成 NPs 是一种简单、经济和环保的选择。本研究利用干女贞果实的水提取物合成了金纳米粒子(AuNPs)和银纳米粒子(AgNPs)。提取物中的生物大分子除了作为还原剂外,还被吸收到 NPs 表面,使其具有极佳的胶体稳定性,从而提高了其催化能力,并反映在其可回收性上。在 NaBH4 存在下,4-硝基苯酚还原反应的 TON 和 TOF 值分别为 1.4 105 和 500 s-1。AgNPs 的最小抑菌浓度 (MIC) 是利用认证收集的病原体确定的(大肠杆菌 MIC = 25 µg/mL;金黄色葡萄球菌 MIC = 100 µg/mL)。在庆大霉素存在的情况下,分数抑制浓度指数(FICIs)显示出协同效应(FICI = 0.5)。研究结果表明,利用绿藻的水提取物可以简单、环保地合成具有催化和抗菌活性的 AuNPs 和 AgNPs。
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来源期刊
Journal of Molecular Liquids
Journal of Molecular Liquids 化学-物理:原子、分子和化学物理
CiteScore
10.30
自引率
16.70%
发文量
2597
审稿时长
78 days
期刊介绍: The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.
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