Efficient degradation of methylene blue: A comparative study using hydrothermally synthesised SnS2, WS2 and VS2 nanostructures. (February 2022)

• Record Type: Journal Article
• Authors: Joseph, Anju; Aneesh, P.M.
• Is Part Of: Materials research bulletin. Volume 146(2022)
• Publication Date: 2022-02
• Subjects: Chalcogenides -- Layered compounds -- Optical properties -- X-ray diffraction -- Catalytic properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2021.111623
• Languages: English
• ISSNs: 0025-5408

Abstract

Highlights: Superior catalytic activity of VS2 . VS2 degraded 99% of MB, a toxic organic dye in 10 min. The rate constant for VS2 nanoflakes was ∼25 times greater than that of SnS2 and WS2 . Abstract: Visible light driven photocatalysis has attracted great interest owing to their potential application in degradation of organic dyes. Transformation of toxic dyes to their non-toxic form is mandatory in the present scenario. Methylene blue (MB) is one such dye used in paper and textile industries. Transition metal dichalcogenides can be utilised as catalyst for dye degradation owing to their two-dimensional layered structure and small band gap. In this work, hydrothermally synthesised SnS2, WS2 and VS2 nanostructures were investigated for their photocatalytic degradation of MB under visible light. The structural, morphological and optical properties of the nanostructures were also discussed. VS2 nanoflakes exhibited superior catalytic property than SnS2 and WS2 nanostructures in degrading MB. 99 % of MB degradation was achieved in 10 min using VS2 in the presence of NaBH4 . This study provides an insight to a new and efficient visible light driven photocatalyst for the degradation of organic dyes. Graphical abstract: Graphical abstract Image, graphical abstract .