article · Processes
This research describes a sustainable method for creating green zinc oxide (ZnO) nanoparticles using an extract from *Licania tomentosa* (Oiti) leaves. The synthesised nanoparticles were thoroughly characterised using various techniques, revealing an average crystallite size of 12.4 nm, a spherical shape, and a band gap of 2.75 eV. These nanoparticles were then tested for their ability to degrade crystal violet dye photocatalytically. Under UV irradiation, they successfully decomposed approximately 79% of the dye within two hours. The study also investigated how factors like catalyst loading, pH, and light intensity affect the degradation process, concluding that Oiti leaf extract is an efficient material for producing ZnO nanoparticles with significant potential for photodegradation applications.
This research offers a sustainable method for producing functional nanomaterials from plant waste. These materials can effectively break down harmful dyes in water, contributing to cleaner environments and more eco-friendly industrial processes, particularly in wastewater treatment.
The research demonstrates the potential for using green synthesised ZnO nanoparticles in environmental remediation, specifically for the photocatalytic degradation of dyes in wastewater. Potential users could include industries involved in textile manufacturing or water treatment facilities seeking sustainable and efficient purification methods. This work represents early-stage research, demonstrating a proof of concept for a novel synthesis method and its application in a controlled laboratory setting.
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Efficient plant biomass utilization is a key component in advancing a sustainable and circular bioeconomy. ZnO nanoparticle synthesis using plant extracts is actively studied as a part of this effort. Here, green ZnO nanoparticles were prepared using Licania tomentosa Benth (also known as Oiti) leaf extract. Characterization of the produced green ZnO nanoparticles (NPs) involved X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR) and UV–Visible spectroscopy (UV-Vis) techniques. Furthermore, we investigated photocatalytic degradation of the crystal violet (CV) dye catalyzed by the obtained ZnO NPs and evaluated the efficiency of the photodegradation process. The synthesized nanoparticles have an average crystallite size of 12.4 nm, as measured by XRD and have a spherical shape as revealed by SEM. UV–Vis studies show that ZnO nanoparticles have a relatively small band gap of 2.75 eV, as estimated by Tauc plot. The photodegradation activity tests using synthesized green ZnO NPs showed that approximately 79% of CV dye is decomposed in 2 h after being exposed to UV irradiation under experimentally studied conditions. The photodecomposition of CV is impacted by different factors, such as the catalyst bandgap and loading, the pH and the intensity of light. Moreover, an optimum photocatalyst loading was determined. Our studies reveal that Oiti leaf extract can be efficiently used for ZnO NPs synthesis, which has significant potential for photodegradation applications.
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DOI: 10.3390/pr13030880
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