Chemical Approach Based ZnS-ZnO Nanocomposite Synthesis and Assessment of their Structural, Morphological and Photocatalytic Properties

Authors Parita Basnet, Dhrubajyoti Samanta, Somenath Chatterjee

Centre for Materials Science and Nanotechnology, Sikkim Manipal Institute of Technology, Sikkim Manipal University, Sikkim, India

Issue Volume 13, Year 2021, Number 1
Dates Received 12 January 2021; revised manuscript received 16 February 2021; published online 25 February 2021
Citation Parita Basnet, Dhrubajyoti Samanta, Somenath Chatterjee, J. Nano- Electron. Phys. 13 No 1, 01025 (2021)
PACS Number(s) 61.72.Uj, 71.55.Eq, 78.40.Fy, 82.30.Lp
Keywords ZnO nanoparticles, ZnS nanoparticles (2) , ZnS-ZnO nanocomposite, XPS (4) , Photocatalysis (4) .

This work describes a comparative assessment between zinc oxide (ZnO) nanoparticles (NP), zinc sulfide (ZnS) NP and ZnS-ZnO nanocomposite (NC). A chemical non-aqueous method was chosen for materials synthesis. From XRD spectra, the crystalline phases and phase purity of the samples were confirmed. The average crystallite sizes were calculated as 69 nm, 5 nm and 10 nm for ZnO NP, ZnS NP and ZnS-ZnO NC, respectively, indicating a relatively pronounced growth and coarsening processes in ZnO NP. The lowering of band gap energy was verified through optical absorption spectra of ZnS-ZnO NC. Morphological investigation revealed that ZnO consisted of plate-like structures, ZnS comprised of agglomerated spheres while ZnS-ZnO NC exhibited both these structures. EDX and XPS spectra of ZnS-ZnO NC confirmed the presence of Zn, S and O in the NC. The photocatalytic degradation of cationic dyes were observed to be the highest by ZnS-ZnO NC compared to its individual components, ZnO and ZnS.

List of References