Efficient photocatalytic degradation of dyes using photo-deposited Ag nanoparticles on ZnO structures: simple morphological control of ZnO

In this work, morphology-controlled ZnO structures were prepared via a hydrothermal method by simple adjustments in the NaOH concentration. The NaOH concentration variation from 0.2 to 1.2 M resulted in the formation of ZnO structures in shapes such as walnut, spherical flower, flower, rod, and urch...

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Bibliographic Details
Published in:RSC advances 2021-02, Vol.11 (15), p.879-8717
Main Authors: Lim, Hyeonhan, Yusuf, Mohammad, Song, Sehwan, Park, Sungkyun, Park, Kang Hyun
Format: Article
Language:English
Subjects:
Chemistry
Dyes
Morphology
Nanoparticles
Optical properties
Photodegradation
Recyclability
Rhodamine
Silver
Walnuts
Zinc oxide
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Summary:In this work, morphology-controlled ZnO structures were prepared via a hydrothermal method by simple adjustments in the NaOH concentration. The NaOH concentration variation from 0.2 to 1.2 M resulted in the formation of ZnO structures in shapes such as walnut, spherical flower, flower, rod, and urchin-like. The extent of OH − ions is the main factor influencing the growth of ZnO structures. Well-defined morphologies, good crystallinity, and optical properties were obtained for all ZnO structures. Among these ZnO structures, ZnOsf (spherical flower-like) structure showed a greater percentage of photodegradation of methyl orange and rhodamine B dyes. Surface plasmon resonance was achieved by modifying the surface of ZnO with Ag nanoparticles. ZnOsf was loaded with Ag nanoparticles by a facile photo-deposition method. Ag-ZnOsf showed superior photoactivity and recyclability for the degradation of methyl orange and rhodamine B. Therefore, modification of different ZnO structures can help realize potential catalysts for future environmental applications. Morphology control of ZnO structures were fabricated by hydrothermal method with simple adjustments of NaOH concentration and Ag-ZnO composite showed superior photoactivity and recyclability for the degradation of MO and RhB.
ISSN:2046-2069
2046-2069
DOI:10.1039/d0ra10945b