Nano-photocatalysts based on ZnS quantum dots/chitosan for the photodegradation of dye pollutants

In this work, nano-photocatalysts based on ZnS quantum dots (QD) functionalized by chitosan were developed using "green" colloidal chemical process in aqueous media at room temperature. The ZnS/chitosan nano-photocatalysts were extensively characterized and the results demonstrated that ch...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2015-01, Vol.76 (1), p.12003
Main Authors: Mansur, H S, Mansur, A A P
Format: Article
Language:English
Subjects:
Aqueous solutions
Biocompatibility
Chitosan
Colloid chemistry
Colloiding
Dyes
Fluorescence
Industrial wastes
Materials science
Methylene blue
Nanocrystals
Nanomaterials
Nanostructure
Photocatalysis
Photocatalysts
Photodegradation
Pollutants
Quantum dots
Room temperature
Ultraviolet radiation
Wastewater
Zinc sulfide
Zinc sulfides
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Summary:In this work, nano-photocatalysts based on ZnS quantum dots (QD) functionalized by chitosan were developed using "green" colloidal chemical process in aqueous media at room temperature. The ZnS/chitosan nano-photocatalysts were extensively characterized and the results demonstrated that chitosan was an effective capping ligand for the direct production of water-soluble ZnS QDs with average nanocrystal sizes of approximately 3.5 nm. Methylene blue dye was used as "model organic pollutant", which was effectively oxidized by the photocatalytic surface activity of the ZnS/chitosan nanostructured systems under UV irradiation. In summary, innovative "green" nano-photocatalyst nanomaterials were produced based on a fluorescent inorganic "core" of ZnS QDs and a biocompatible organic "shell" of chitosan for potential use on the photodegradation of hazardous dye pollutants present in industrial wastewater.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/76/1/012003