article · Materials Research Express
A non-thermal Gliding Arc Discharge plasma system provides an efficient method to produce highly pure zinc oxide nanoparticles. Using ambient air as the source gas, this technique operates through straightforward steps and requires a remarkably brief processing time, offering a potentially scalable and sustainable route compared to traditional manufacturing processes. Characterisation confirms the production of pure zinc oxide nanopowder with an average particle size of 27.18 nanometres and an optical band gap of 3.28 electronvolts. When tested for wastewater treatment, the synthesised nanoparticles demonstrated strong photocatalytic activity under ultraviolet light irradiation over two and a half hours, achieving significant removal rates for methylene blue, Brilliant Cresyl Blue, and Congo Red dyes. These outcomes show that gliding arc discharge plasma is an effective tool for nanomaterial generation.
Conventional chemical synthesis of nanomaterials can be slow and resource-intensive. Using gliding arc discharge plasma allows rapid synthesis from ambient air without complex precursors. Producing high-purity zinc oxide nanoparticles quickly and sustainably supports cleaner manufacturing methods while providing active materials capable of breaking down harmful industrial dye contaminants in wastewater systems.
The work addresses industrial wastewater treatment, specifically targeting the degradation of organic dye pollutants. Potential users include water treatment operators and industrial chemical producers seeking sustainable photocatalytic materials. The research demonstrates laboratory-scale synthesis and bench-level photocatalytic testing under ultraviolet light, indicating an early-stage development level with potential for future scale-up due to the simple setup and reliance on ambient air.
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Abstract In this study we present an efficient method for synthesizing highly pure ZnO nanoparticles using a Gliding Arc Discharge (GAD) plasma system as a non-thermal plasma source. This approach offers distinct advantages over conventional techniques, including simplicity, a short synthesis time, utilization of readily available air as the source gas, and potential scalability, rendering it a promising alternative for sustainable ZnO nanoparticle production. The synthesized nanoparticles physicochemical properties were characterized using various techniques, such as scanning electron microscopy (SEM), energy dispersive x-ray analysis (EDAX), UV-visible spectroscopy (UV–vis), Fourier-transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), Thermogravimetric Analysis (TGA), and Differential Scanning Calorimetry (DSC). Furthermore, we evaluated the effectiveness of the synthesized ZnO nanoparticles for wastewater treatment by assessing their photocatalytic activity against methylene blue (MB), Brilliant Cresyl Blue (BCB), and Congo Red (CR) under UV light irradiation for 2 h and 30 min. The results confirmed the successful synthesis of highly pure ZnO nano-powder with an average size of 27.18 nm and a band gap energy of 3.28 eV in an exceptionally brief duration and through straightforward steps. Additionally, GAD plasma-assisted ZnO nanoparticles exhibited a significant dye removal rate, showcasing their potential as highly effective materials for photocatalytic wastewater treatment. This study contributes new insights into the application of GAD plasma for nanoparticle synthesis.
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DOI: 10.1088/2053-1591/ad1a82
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