通过简单微波法使用新型硫化剂制备HgS纳米颗粒的结构与光谱表征

摘要

Mercury sulfide (HgS) crystals with different morphologies and particle sizes, were obtained via a simple microwave reaction by a new precursor complex, [bis ((2-suphanylphenyl)imino]methylphenol) Hg(II)] ([Hg(C13H11NSO)2]2+). The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet–visible (UV−Vis) spectroscopy. Mercury sulfide nanostructures with different sizes were prepared. The effects of precursor concentration, type of solvent, microwave time, and power on the particle size and morphology were investigated. The results show that the type of solvent and microwave power play key roles in the final size of HgS. Ethylene glycol is the best solvent for the synthesis of very fine particles of HgS, and the best power for the preparation of HgS nanoparticles with uniform size distribution is 900 W. The band gap for HgS nanoparticles calculated by UV–Vis spectrum was 3.2 eV which had about 1.2 eV blue shift in comparison with the band gap of 2 eV for bulk sample.%通过简单的微波反应，使用一种新型的前驱体复合物[Hg(C13H11NSO)2]2+，制备具有不同形貌和颗粒尺寸的晶体汞硫化物(HgS)。通过X射线、扫描电镜、紫外−可见光谱对产物进行表征，获得了具有不同尺寸的汞硫化物纳米结构。研究前驱体浓度、溶剂种类、微波时间和功率对产物尺寸和形貌的影响。结果表明：溶剂种类和微波功率极大地影响HgS的最终尺寸。乙二醇是合成细小颗粒HgS的最佳溶剂，制备具有尺寸分布均匀的HgS纳米颗粒的最佳功率是900 W。通过紫外−可见光谱计算出HgS纳米颗粒的带隙是3.2 eV,这相对于块体样品2 eV的带隙蓝移了1.2 eV。