In the present study solvothermal route is chosen to synthesize uncapped and EDTA capped zinc sulphide (ZnS) nanoparticles. X-ray diffraction studies confirmed the zinc-blende crystal structure with crystallite size lying between 6 and 16 nm. Scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM) show the prominent decrease in agglomeration of capped nanoparticles than that of uncapped nanoparticles while the elemental analysis confirmed the presence of Zinc and Sulphur. The optical band gap increased with decrease in particle size as calculated by UV-visible absorption spectroscopy. The photoluminescence spectroscopy (PL) shows that the blue-visible emission peaks are shifted to higher wavelength region for uncapped nanoparticles than that of EDTA capped nanoparticles. The presence of different organic and inorganic functional groups and encapsulation of EDTA in the prepared samples are confirmed by Fourier Transform Infrared Spectroscopy (FTIR). The synthesized nanoparticles are found to be good antibacterial agents of Escherichia coli and Staphylococcus aureus. The objective of the present work is to show that the EDTA capped nanoparticles are found more resistant towards the bacterial strains than that of uncapped nanoparticles which is the novelty of our work and the activity increases with increase in the concentration of nanoparticles. Thus, they may be used for biological and medicinal purposes such as an antiseptic, photo corrosion, antioxidant, antifungal etc.

在本研究中，选择溶剂热法合成未封端和 EDTA 封端的硫化锌 (ZnS) 纳米粒子。X 射线衍射研究证实了闪锌矿晶体结构，微晶尺寸介于 6 和 16 nm 之间。扫描电子显微镜 (SEM) 和高分辨率透射电子显微镜 (HRTEM) 显示，与未封端的纳米颗粒相比，封端的纳米颗粒的团聚显着减少，而元素分析证实了锌和硫的存在。通过紫外-可见吸收光谱计算，光学带隙随着粒径的减小而增加。光致发光光谱 (PL) 表明，与 EDTA 封端的纳米颗粒相比，未封端的纳米颗粒的蓝色-可见发射峰向更高的波长区域移动。通过傅里叶变换红外光谱 (FTIR) 证实了制备的样品中存在不同的有机和无机官能团以及EDTA 的包封。发现合成的纳米颗粒是大肠杆菌和黄色葡萄球菌的. 本工作的目的是表明 EDTA 封端的纳米颗粒比未封端的纳米颗粒更能抵抗细菌菌株，这是我们工作的新颖性，并且活性随着纳米颗粒浓度的增加而增加。因此，它们可用于生物和医学用途，例如防腐剂、光腐蚀、抗氧化剂、抗真菌剂等。