Journal
RSC ADVANCES
Volume 11, Issue 15, Pages 8709-8717Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ra10945b
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Korea Government (MSIP) [NRF-2020R1I1A3067208, 2018R1D1A1B07045663, NRF-2018H1A2A1062253]
- PNU-RENovation (2019-2020)
- National Research Foundation of Korea [4199990113967, 2018H1A2A1062253, 2018R1D1A1B07045663] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Morphology-controlled ZnO structures were prepared by adjusting NaOH concentration, resulting in different shapes such as walnut, spherical flower, and urchin-like structures. The OH- ion concentration played a key role in the growth of ZnO structures with well-defined morphologies and good crystallinity. Surface modification with Ag nanoparticles enhanced the photoactivity and recyclability of ZnO structures, showing promising potential as catalysts for environmental applications.
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.
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