Abstract The current study was focused on detection of sulfide ion colorimetrically form aqueous solution by using silver-polyvinylpyrrolidone nanocomposites (Ag–PVP NCs). The prepared NCs was analyzed by using UV–visible spectrophotometer, X-ray diffraction (XRD) analyzer, fourier transform infrared spectrometer (FTIR), transmission electron microscope (TEM), particle size analyzer, energy dispersive X-ray spectrometer (EDS) and zeta sizer. The minimum detectable limit for sulfide by Ag–PVP NCs was calculated to be 1.05 nM. The decrease in absorbance and colour variation from brownish yellow to reddish brown was observed after the interaction of sulfide ion with Ag–PVP NCs due to the aggregation of NPs. The competitive ions presence with the analyte solution did not interfere the sulfide ion detection ability by prepared probe. The effective detection of the probe was studied with various pH, temperature and salinity. The proposed probe was found to be an efficient tool for the sensitive, selective, cost effective and on-site detection of sulfide ions from various aqueous media.

中文翻译：

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用于选择性和灵敏检测水样中硫化物及其抗菌活性的银-聚乙烯吡咯烷酮纳米复合材料的开发

摘要 目前的研究重点是通过使用银-聚乙烯吡咯烷酮纳米复合材料 (Ag-PVP NCs) 比色法检测硫化物离子形成的水溶液。使用紫外可见分光光度计、X 射线衍射 (XRD) 分析仪、傅里叶变换红外光谱仪 (FTIR)、透射电子显微镜 (TEM)、粒度分析仪、能量色散 X 射线光谱仪 (EDS) 和zeta 粒度仪。Ag-PVP NCs 对硫化物的最低检测限计算为 1.05 nM。由于NPs的聚集，在硫化物离子与Ag-PVP NCs相互作用后观察到吸光度和颜色从棕黄色到红棕色的变化。分析物溶液中存在的竞争性离子不会干扰制备的探针对硫化物离子的检测能力。在不同的pH、温度和盐度下研究了探针的有效检测。发现所提出的探针是一种有效的工具，可用于从各种水性介质中灵敏、选择性、经济地和现场检测硫化物离子。