ItemArticle

Tribo-catalytic Dye Degradation Driven by Mechanical Friction Using ZnS Microparticles with Different Morphologies

Title
Tribo-catalytic Dye Degradation Driven by Mechanical Friction Using ZnS Microparticles with Different Morphologies
Creator
Deepthi, V.; Manoj, B.; Joby, Anagha
Description
This work examines the tribocatalytic properties of zinc sulphide (ZnS) microparticles for dye degradation using mechanical energy. ZnS microparticles were synthesized into four distinct morphologies: microrods, spherical aggregates, microflakes, and microflowers using the solvothermal method. These morphologies were characterized using XRD, FESEM, EDS analysis, UVVis spectroscopy, XPS, and BET analysis. The tribocatalytic activity was assessed by degrading methylene blue (MB) dye under magnetic stirring in a dark setting. The experiment was carried out at the neutral pH of MB solution (~ 6.5). Among the prepared ZnS morphologies, the micro flakes displayed the largest surface area (120m/g) and exhibited enhanced dye degradation efficacy, achieving 57% MB elimination after 15h of agitation at 800rpm, corresponding to a pseudo-first-order rate constant of 0.054min?. By analyzing the degradation kinetics as pseudo- first-order kinetics, we elucidated the crucial significance of surface morphology and contact area in facilitating effective electron transfer during tribocatalysis. Additionally, we investigated the influence of PTFE bar size, material concentration, stirring speed and initial dye concentration on degradation efficiency. Reusability test demonstrated stable performance over four consecutive cycles with a minor decrease (~ 5%). The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.
Source
Topics in Catalysis;
Date
01-01-2026
Publisher
Springer
Subject
Dye degradation; Surface morphology; Tribocatalysis; ZnS microparticles
Coverage
Deepthi V., Department of Physics and Electronics, Christ University, Bangalore, India; Manoj B., Department of Physics and Electronics, Christ University, Bangalore, India; Joby A., Department of Physics and Electronics, Christ University, Bangalore, India
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 10225528;
Format
online
Language
English
Type
Article

Citation

Deepthi, V.; Manoj, B.; Joby, Anagha, “Tribo-catalytic Dye Degradation Driven by Mechanical Friction Using ZnS Microparticles with Different Morphologies,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 18, 2026, https://archives.christuniversity.in/items/show/21959.

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