Improved Structural, Optical and Photoluminescence Properties of EDTA Capped Zinc Sulfide Nanoparticles for Optoelectronic Applications

• Published in: Journal of cluster science Vol. 32; no. 1; pp. 155 - 161
• Main Author: Vijai Anand, K.
• Format: Journal Article
• Language: English
• Published: New York Springer US 2021; Springer Nature B.V
• Subjects: Acids; Aqueous solutions; Capping; Catalysis; Chemistry; Chemistry and Materials Science; Energy gap; Ethylenediaminetetraacetic acids; Fourier transforms; Grain size; Inorganic Chemistry; Morphology; Nanochemistry; Nanoparticles; Optical properties; Optoelectronics; Original Paper; Particle size; Photoluminescence; Physical Chemistry; Quantum confinement; Radiation; Spectrum analysis; Stabilizers (agents); Zinc sulfide; Zincblende; Nanoparticles; Chemical co-precipitation; Optical; Structural; Photoluminescence
• ISSN: 1040-7278; 1572-8862
• DOI: 10.1007/s10876-020-01772-0

In the present study, ZnS nanoparticles have been synthesized via a simple and cost effective facile chemical co-precipitation method using ethylenediaminetetraaceticacid (EDTA) as capping or stabilizing agent. The role of EDTA was to stabilize the nanoparticle against aggregation and also to provide chemical passivation that leads to a significant influence on the improved structural, optical and photoluminescence properties of nanoparticles. The average grain size of the prepared nanoparticles calculated from the XRD pattern using Scherrer’s formula is about 3–5 nm, which exhibit cubic zinc blende structure. The SAED pattern exhibits three rings corresponding to (111), (220) and (311) planes respectively, which are in good agreement with the cubic phase of ZnS. The UV–Vis absorption results revealed that the EDTA capped ZnS nanoparticles exhibit strong quantum confinement effect as the optical band gap energy increased significantly compared to the uncapped and bulk ZnS. From FTIR analysis, the formation of EDTA capped ZnS nanoparticles were confirmed. Fluorescence spectra show that the EDTA capping increases the PL intensity compared to uncapped ZnS nanoparticles. From the Raman studies, the appearance of multiple resonance raman peaks show that the prepared EDTA capped ZnS nanoparticles exhibit good optical quality.