ArticleDiscover nano2026
A comparative analysis of solar photocatalytic degradation of MB, RhB, and CV dyes with ZnO nanoparticles.
Article in Discover nano, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
This study reports the synthesis of ZnO nanoparticles via a simple co-precipitation method and their evaluation for solar-driven photocatalytic degradation of organic dyes. XRD analysis confirmed the formation of a hexagonal wurtzite phase with good crystallinity, while Raman spectroscopy further supported the structural integrity of ZnO. Transmission electron microscopy (TEM) revealed the morphology and particle-size distribution of the synthesized nanoparticles, and selected-area electron diffraction (SAED) indicated their polycrystalline nature. The photocatalytic performance of ZnO nanoparticles was investigated under natural sunlight using three model dyes: Methylene Blue (MB), Rhodamine B (RhB), and Crystal Violet (CV). UV-Visible spectroscopy showed a progressive decrease in dye concentration, following pseudo-first-order kinetics. The degradation efficiencies reached approximately 98% for MB, 93% for RhB, and 96% for CV within 160 min. XPS analysis suggests the presence of oxygen vacancy-related defect states, which may contribute to enhanced photocatalytic activity by influencing charge carrier dynamics. Overall, the study demonstrates the effectiveness of ZnO nanoparticles for solar-driven dye degradation under natural conditions. However, further investigations, including detailed optical characterization and stability studies, are required to fully assess their practical applicability in wastewater treatment.
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