Synthesis and characterisation of CdS and PbS nanoparticles in an imidazolium based ionic liquid
type: CreativeWork
description: Semiconductor metal sulfides nanoparticles have been prepared using the imidazolium based ionic liquid surfactant as both the stabilizer and growth modifier. The structural and morphological properties of the as-prepared nanoparticles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), ultraviolet visible and near infrared radiation (UV-Vis and NIR), photoluminescence and fourier transform infrared spectroscopy (FTIR). Various synthetic methods (thermolysis, microwave and room temperature syntheses) were used and reaction parameters such as temperature and injection protocols, precursor type were varied to study the optical and structural properties of the as-synthesized nanoparticles. The CdS nanoparticle synthesis was carried by altering the reaction temperature and the injection protocol using single and dual source precursors. Cadmium ethyl xanthate was used as single source precursor whereas cadmium acetate and dodecanethiol were used as dual source molecular precursors in the presence of 1-ethyl-3-methylimidazolium methanesulfonate ionic liquid. XRD studies confirmed the formation of cubic and hexagonal phases for low and high temperatures respectively. The SAED results revealed that the nanoparticles were crystalline and the morphological studies further showed formation of nano-sized particles in the range of 2 – 15 nm, with close to spherical shaped morphologies. Blue-shifted band gaps further confirmed formation of very small CdS nanoparticles, which were temperature dependent. In the synthesis of PbS nanoparticles, the effect of sulfur source (with the same lead source, lead acetate) was studied for dual source precursors with respect to temperature and lead ethyl xanthate complex was used as single source molecular precursor in the ionic liquid medium. Sodium sulfide and dodecanethiol were used as different sulfur sources. XRD studies confirmed formation of cubic phase of PbS. Electro…
abstract: Semiconductor metal sulfides nanoparticles have been prepared using the imidazolium based ionic liquid surfactant as both the stabilizer and growth modifier. The structural and morphological properties of the as-prepared nanoparticles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), ultraviolet visible and near infrared radiation (UV-Vis and NIR), photoluminescence and fourier transform infrared spectroscopy (FTIR). Various synthetic methods (thermolysis, microwave and room temperature syntheses) were used and reaction parameters such as temperature and injection protocols, precursor type were varied to study the optical and structural properties of the as-synthesized nanoparticles. The CdS nanoparticle synthesis was carried by altering the reaction temperature and the injection protocol using single and dual source precursors. Cadmium ethyl xanthate was used as single source precursor whereas cadmium acetate and dodecanethiol were used as dual source molecular precursors in the presence of 1-ethyl-3-methylimidazolium methanesulfonate ionic liquid. XRD studies confirmed the formation of cubic and hexagonal phases for low and high temperatures respectively. The SAED results revealed that the nanoparticles were crystalline and the morphological studies further showed formation of nano-sized particles in the range of 2 – 15 nm, with close to spherical shaped morphologies. Blue-shifted band gaps further confirmed formation of very small CdS nanoparticles, which were temperature dependent. In the synthesis of PbS nanoparticles, the effect of sulfur source (with the same lead source, lead acetate) was studied for dual source precursors with respect to temperature and lead ethyl xanthate complex was used as single source molecular precursor in the ionic liquid medium. Sodium sulfide and dodecanethiol were used as different sulfur sources. XRD studies confirmed formation of cubic phase of PbS. Electro…
author: Tshemese, Zikhona
keywords: nanoparticles --X-ray diffraction --ionic liquids --electron microscopy
license: https://devspace.unizulu.ac.za/bitstreams/0d6d4582-07d8-429f-a00d-2bdcea5cbf74/download
date published: 2018
date modified: 2026-07-24T06:16:55Z
provider: University of Zululand
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Zululand