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Photocatalytic study of organosilane-modified zinc oxide nanoparticles

Authors
  • Tăbăcaru, Aurel
  • Buşilă, Mariana
  • (Ghisman) Pleşcan, Viorica
  • Muşat, Viorica
Type
Published Article
Journal
Ovidius University Annals of Chemistry
Publisher
De Gruyter Open
Publication Date
Dec 01, 2015
Volume
26
Issue
2
Pages
61–66
Identifiers
DOI: 10.1515/auoc-2015-0012
Source
De Gruyter
Keywords
License
Green

Abstract

In our recent studies, we have investigated the tunability of optical properties of zinc oxide nanoparticles (ZnO NPs) through surface modification with organosilane surfactants. In the present paper, the effect of ZnO NPs modified with variable amount of 3-(trimethoxysilyl)propylmethacrylate (MPS) surfactant was investigated toward the photocatalytic degradation of methylene blue (MB), using two different UV light sources emitting at 254 nm and 365 nm. While the maximum photodegradation efficiency of 63% was reached by ZnO NPs loaded with the highest concentration of MPS upon exposure at 254 nm, in the case of UV exposure at 365 nm an opposite photodegradation trend was observed. Actually, a significant photodegradation efficiency of 95% was recorded by the unmodified ZnO, followed by ZnO NPs modified with 2% MPS for which the photodegradation efficiency amounted to 80%, thus highlighting their best photocatalytic performance.

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