This study demonstrates the effective photocatalytic decomposition of malachite green dye using eco-friendly zinc oxide nanoparticles synthesized from Morinda citrifolia.
The manufacture of metal oxide nanoparticles using extracts from medicinal plants offers a viable and environmentally responsible substitute for conventional chemical methods. This work aims to utilize the leaf extract of the medicinal plant Morinda citrifolia (Noni) to synthesize zinc oxide nanoparticles in an eco-friendly manner. The zinc oxide nanoparticles obtained through biosynthesis underwent characterization using various analytical techniques, including XRD, SEM, EDX, FTIR, and UV spectroscopy. Moreover, this investigation included an assessment of the photoluminescent activity of the synthesized zinc oxide nanoparticles under varying excitation wavelengths. The observed emission in the visible region finds significant applications in opto-electronic devices, particularly for display purposes. Sunlight-driven photocatalytic degradation efficiency exceeding 90% was achieved within a 60-minute timeframe under sunlight irradiation.
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Tamilselvi et al. (2025) studied this question.
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