Accessible Unlicensed Requires Authentication Published online by De Gruyter October 21, 2021

Enhanced photocatalytic activity in hydro-thermally grown nano structured ZnO/SnS core–shell composites

Govinda Dharmana, Prabhakara Srinivasa Rao Masabattula and Dakshina Murthy Potukuchi

Abstract

Detoxification of water bodies from industrial pollutant dyes by semiconductor heterojunction composites briefed. Synthesis of ZnO/SnS core/shell nanocomposites by ecofriendly hydrothermal method presented. Characterization by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–Vis absorption spectroscopy photoluminescence (PL) etc., were presented. Abundance of orthorhombic ZnO and hexagonal SnS was confirmed by X-ray diffraction. Compression of hexagonal ZnO planes (as core nanorods) and SnS core nanoparticles infers growth of core shell structure. Average crystallite size is found to be 5.8 nm. Structure and TEM morphology correlated. XPS reveals abundance of elemental oxidation state. Photocatalytic activity was studied by using visible light irradiation. Photoluminescence for ZnO/SnS core/shell nanocomposites inferred significant emission peaks. Enhanced PCA observed against visible light. Methylene blue dye characteristic PCAby its degradation evinced. PCA is found optimal for Z-S3. Configuration of bandgap promoted growth of novel hetero junction. Physical mechanism is proposed for the enhanced photocatalytic activity as accompanied by degradation of MB dye.


Corresponding author: Dakshina Murthy Potukuchi, Department of Physics, Jawaharlal Nehru Technological University, Kakinada533003, AP, India, E-mail:

Acknowledgments

Authors (MPSR and Govinda) are thankful to GMR institute of Technology, Rajam for providing financial assistance to carry out research work through the SEAD grant.

  1. Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2021-07-27
Revised: 2021-09-12
Accepted: 2021-09-28
Published Online: 2021-10-21

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