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ARTICLE

MoS₂-CZTS: a 2D-3D nanocomposite to enhance the photocatalytic performance in degradation of methylene blue dye

R. N. Mondal^a,b,*, S. Sahab¹

a Dept. of Physics, Kharagpur College, Kharagpur, Paschim Medinipur, India, 721305
b Dept. of Physics, Vidyasagar University, Midnapore, Paschim Medinipur, India, 721102

* Corresponding Author:

Chalcogenide Letters 2024, 21(10), 771-783. https://doi.org/10.15251/CL.2024.2110.771

Received 02 July 2024; Accepted 04 October 2024;

Abstract

Cu₂ZnSnS₄ nanocrystals (CZTS NCs), MoS₂ nanosheet (NS) and MoS₂-CZTS nanocomposite (NC) have been synthesized using solvothermal route. Structural characterization of samples have been done by XRD, Raman spectroscopy, HR-TEM. Samples have optically characterized by UV-Vis absorption, photoluminescence (PL) and time co-related single photon counting (TCSPC) study. The XRD, HR-TEM and Raman spectroscopy established tetragonal kesterite phase for both CZTS NCs and MoS2-CZTS NC. Enhancement of efficiency of CZTS NCs to degrade methylene blue (MB) dye, illuminated by visible light, have been observed by loading 1 wt.% MoS₂ NS and found to be ~100% in only 15 minutes. This is due to efficent transfer of charge carriers at p-CZTS and n-MoS₂ heterojunction interface, confirmed by quenching of PL intensity and decrease in average lifetime of carriers.

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Keywords

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