SnS-Nanocatalyst: Malachite green degradation and electrochemical sensor studies

Hegde, SS and Bose, RSC and Surendra, BS and Vinoth, S and Murahari, P and Ramesh, K (2022) SnS-Nanocatalyst: Malachite green degradation and electrochemical sensor studies. In: Materials Science and Engineering B: Solid-State Materials for Advanced Technology, 283 .

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Abstract

The photocatalytic degradation of the toxic dye malachite green (MG), has been investigated using visible light responsive tin sulfide (SnS) nanocatalysts and details of degradation intermediates were obtained by liquid chromatography-mass spectrometry (LC-MS). Excellent photo-degradation efficiency of 99 and 98 is achieved within 75 min by using SnS nanoparticles (NPs) having an orthorhombic and cubic crystal structure, respectively. Microstructure of the synthesized SnS nanoparticles (NPs) were examined by high-resolution transmission electron microscopy (HR-TEM) and selected area electron diffraction (SAED). The oxidation states of SnS NPs were analyzed by X-ray photoelectron (XPS) spectroscopy. The stabilizer polyvinyl pyrrolidone (PVP) was found to have pronounced effect on the crystallinity and morphology of the nanoparticles. Thirty-four intermediate products from the degradation of malachite green were identified by LC-MS analysis, and their structural details, chemical name, observed molecular mass, retention time and degradation mechanisms are summarized. Electrochemical analysis showed excellent performance in redox potential measured by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Further, SnS NPs extended their electrochemical sensor activities to detect lead acetate, a heavy metal chemical present in the water. The prepared SnS/LDPE floating catalyst has advantage of easy recovery and thereby its potential to re-use in treating textile and dying industry wastewater.

Item Type:	Journal Article
Publication:	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the Elsevier Ltd.
Keywords:	Crystal structure; Crystallinity; Cyclic voltammetry; Degradation; Electrochemical impedance spectroscopy; Electrochemical sensors; Electron diffraction; Heavy metals; High resolution transmission electron microscopy; Layered semiconductors; Lead compounds; Liquid chromatography; Mass spectrometry; Morphology; Nanoparticles; Redox reactions; Sulfur compounds; Synthesis (chemical); Tin compounds; Wastewater treatment, Cubic SnS; Degradation intermediates; Liquid chromatography - mass spectrometries; Malachite green; Nano-catalyst; Orthorhombic crystal structures; Photocatalytic degradation; Tin sulfide; Toxic dyes; Visible-light-responsive, IV-VI semiconductors
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	29 Jun 2022 07:21
Last Modified:	29 Jun 2022 07:21
URI:	https://eprints.iisc.ac.in/id/eprint/73960

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