Fabrication and Evaluation of Ag2S Nanoparticles Derived from Lemon Citrus: Structural, Optical, and Photocatalytic Insights for Methylene Blue Degradation and Antibacterial Effects

IF 2 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY
Krishna Gopal Mondal, Soumen Rakshit, Bappa Sona Kar, Suman Kumar Halder, Satyajit Saha, Paresh Chandra Jana
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引用次数: 0

Abstract

Silver sulfide (Ag2S) nanoparticles (NPs) have been synthesized via a green synthesis route using varying amounts of lemon extract and evaluated for photocatalytic and antibacterial applications. Structural and morphological characterizations have been performed using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), UV–vis spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, dynamic light scattering (DLS), and energy-dispersive X-ray (EDX) analysis. The XRD patterns confirmed high crystallinity without impurity peaks. The estimated crystallite sizes via the Williamson–Hall method showed that the Ag2S-20 sample has the smallest particle size among Ag2S-10 and Ag2S-30. FESEM revealed nearly spherical morphology, with grain sizes consistent with XRD results. Optical band gap values for Ag2S-10, Ag2S-20, and Ag2S-30 samples are 1.5, 1.8, and 1.6 eV, respectively, which are higher than bulk Ag2S. Photocatalytic activity has been tested using methylene blue (MB) dye under light irradiation. The Ag2S-20 sample exhibited the highest degradation efficiency, achieving nearly 80% dye removal within 7 h. Antibacterial studies showed that the Ag2S NPs have been more effective against gram-negative bacteria, particularly Escherichia coli. The Ag2S-20 sample demonstrated a minimum inhibitory concentration (MIC) of 60 µg/mL. These findings highlight the potential of green-synthesized Ag2S NPs in environmental remediation and antimicrobial applications.

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从柠檬柑橘中提取的Ag2S纳米颗粒的制备和评价:亚甲基蓝降解和抗菌效果的结构、光学和光催化见解
采用绿色合成方法合成了硫化银纳米颗粒(Ag2S),并对其光催化和抗菌应用进行了评价。利用x射线衍射(XRD)、场发射扫描电子显微镜(FESEM)、紫外-可见光谱、傅里叶变换红外(FTIR)光谱、动态光散射(DLS)和能量色散x射线(EDX)分析进行了结构和形态表征。XRD谱图证实结晶度高,无杂质峰。通过Williamson-Hall法估算的晶粒尺寸表明,Ag2S-20样品的晶粒尺寸在Ag2S-10和Ag2S-30样品中最小。FESEM显示近球形形貌,晶粒尺寸与XRD结果一致。Ag2S-10、Ag2S-20和Ag2S-30样品的光学带隙值分别为1.5、1.8和1.6 eV,均高于本体Ag2S。用亚甲基蓝(MB)染料进行了光催化活性测试。Ag2S-20样品表现出最高的降解效率,在7小时内达到近80%的染料去除率。抗菌研究表明,Ag2S NPs对革兰氏阴性菌,特别是大肠杆菌更有效。Ag2S-20样品的最低抑菌浓度(MIC)为60µg/mL。这些发现突出了绿色合成Ag2S NPs在环境修复和抗菌应用方面的潜力。
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来源期刊
ChemistrySelect
ChemistrySelect Chemistry-General Chemistry
CiteScore
3.30
自引率
4.80%
发文量
1809
审稿时长
1.6 months
期刊介绍: ChemistrySelect is the latest journal from ChemPubSoc Europe and Wiley-VCH. It offers researchers a quality society-owned journal in which to publish their work in all areas of chemistry. Manuscripts are evaluated by active researchers to ensure they add meaningfully to the scientific literature, and those accepted are processed quickly to ensure rapid online publication.
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