article · Inorganic Chemistry Communications
Cerium oxide nanoparticles can be synthesised using an eco-friendly precipitation method supported by Portulaca oleracea plant extract, which acts as a reducing and stabilising agent. The resulting cubic nanoparticles display quasi-spherical structures with crystallite sizes averaging 16 nanometres and particle sizes ranging from 4 to 14 nanometres. Optical analysis confirms the expected cerium-oxygen bonding patterns. When evaluated as photocatalysts under visible light, the nanoparticles achieve high degradation efficiencies on organic dyes, breaking down 98 percent of methylene blue and 95 percent of methyl orange. The breakdown follows pseudo-first-order kinetics with steady rate constants. In durability assessments, the nanoparticles maintain stable photocatalytic activity across five reuse cycles, demonstrating practical potential for wastewater treatment and green environmental remediation.
Industrial dye pollution poses persistent environmental hazards, demanding efficient and non-toxic water treatment methods. Producing active catalysts through plant-based green synthesis eliminates hazardous chemical precursors, while using visible light rather than ultraviolet light lowers the energy required for dye degradation. Demonstrating reusability across multiple cycles shows that green nanomaterials can effectively clean contaminated wastewater without requiring complex, environmentally harmful manufacturing procedures.
The findings indicate potential application in industrial wastewater treatment, specifically for facilities discharging dye effluents such as textile or chemical operations. Plant operators and environmental remediation services could utilise these reusable catalysts to treat contaminated water using visible light. However, the technology is currently at an early laboratory stage, with performance demonstrated only in bench-scale experiments across five operational cycles.
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• Nanoceria successfully synthesised by a new eco-friendly precipitation method for the first time to using the Portulaca oleracea extract. • Physical properties of nanoceria were studied. • MB and MO photocatalysis performance high efficiency. This paper presents a novel method for synthesizing cerium oxide nanoparticles (CeO 2 NPs) using Portulaca oleracea extract, focusing on their structural, optical, and photocatalytic properties. CeO 2 NPs were prepared through a simple, cost-effective, and environmentally friendly protocol, utilizing the reducing and stabilizing properties of Portulaca oleracea. Structural analysis revealed the formation of cubic CeO 2 with an average crystallite size of 16 nm. Optical studies using FTIR and Raman spectroscopy confirmed the characteristic absorption bands of Ce-O and O-Ce-O bonds, while HR-TEM imaging showcased quasi-spherical nanoparticles with sizes ranging from 4 nm to 14 nm. The synthesized CeO 2 NPs exhibited significant photocatalytic activity towards the degradation of methylene blue (MB) and methyl orange (MO) under visible light irradiation. The degradation efficiencies achieved were 98 % for MB and 95 % for MO. Kinetic analysis indicated pseudo-first-order degradation kinetics, with observed rate constants of 0.018 min −1 for MO and 0.014 min −1 for MB. Furthermore, CeO 2 NPs demonstrated stable and reusable photocatalytic performance over five cycles, highlighting their potential for practical applications in wastewater treatment. Overall, this study presents a promising eco-friendly approach for synthesizing CeO 2 NPs with enhanced photocatalytic properties, contributing to the advancement of green nanotechnology for environmental remediation.
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DOI: 10.1016/j.inoche.2024.112243
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