Kinetically Assisted Chemical Removal of Organic Contaminants by Reactive Oxygen Species: Insights from ReaxFF Molecular Dynamics Simulations
Zixu Wang, Yuhai Li, Peng Zhang, Fei Wang, Laixi Sun, Qingshun Bai, Mingzhi Zhu, Baoxu Wang
TL;DR
This study uses simulations to show how kinetic energy from reactive oxygen species helps remove organic contaminants from laser systems.
Contribution
The study identifies and quantifies how kinetic energy enhances chemical decomposition of contaminants via transport and pathway activation.
Findings
Kinetic energy increases contaminant decomposition rate by up to 1310%.
Two dominant pathways are butyl chain cleavage and benzene ring cleavage.
Higher kinetic energy improves transport and activates specific reaction pathways.
Abstract
Organic contaminants on optical components critically impair intense laser systems. Oxygen plasma cleaning is a promising non-contact method, yet the mechanism by which the initial kinetic energy of reactive oxygen species assists chemically driven removal remains unclear. This study employs ReaxFF molecular dynamics to elucidate how reactive oxygen species chemically decompose dibutyl phthalate and how kinetic energy assists chemical reactions by enhancing transport, penetration, and energy transfer. While the core removal mechanism is chemical, kinetic energy promotes plasma-contaminant encounters and facilitates access to otherwise sluggish pathways. The results show that kinetic energy is a key promoter that enhances chemical decomposition, with the contaminant decomposition rate enhanced by up to 1310% and residues reduced by 81.13% compared to pure chemical reactions. This study…
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Taxonomy
TopicsLaser-induced spectroscopy and plasma · Laser Design and Applications · Laser-Matter Interactions and Applications