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<p>A sustainable and green synthetic route comprising renewable resources/reagents for the synthesis of metal oxide nanoparticles has a better edge over the conventional chemical synthesis. The present work reports a novel method for the synthesis of CeO<sub>2</sub> nanoparticles (NPs) of average size 19.48&#xa0;nm using an aqueous extract of seeds of Trachyspermum ammi (<i>T. ammi</i>), also known as ajwain or carom seeds, for the first time. <i>T. ammi</i> seed’s extract is rich in bioactive constituents that supports the synthesis of metal oxides nanoparticles. CeO<sub>2</sub> synthesized in the current work were characterized by analytical techniques such as Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD), field emission scanning electron microscopy (FE-SEM), Energy dispersive X-ray analysis (EDAX) and Ultra violet-visible diffuse reflectance spectroscopy<b> (</b>UV–Vis DRS). Further, <i>T. ammi</i> derived biogenic CeO<sub>2</sub> NPs were used to evaluate their potential application for degradation of Ibuprofen (IBP), a drug that is listed as an essential medicine by WHO, but also detected in water at some regions across the globe and raises concern due to reports of pharmaceutical water pollution. The degradation of IBP was studied by UV–Vis spectrophotometry and mass spectrometry. Furthermore, zeta potential measurements of CeO<sub>2</sub> NPs were also carried out to assess the degradation. Key factors affecting the degradation such as drug to catalyst ratio, pH of reaction, role of H<sub>2</sub>O<sub>2</sub> as co- catalyst and exposure of UV light were also investigated and reported. Highest percentage degradation calculated from spectrophotometric data was 61% in our optimized condition. Water quality of synthetic water sample of IBP before and after treatment with photocatalyst was determined by measurement of chemical Oxygen demand (COD) using standard procedure. The percentage COD removal was found 60%. In addition, cytotoxicity studies of CeO<sub>2</sub> NPs were also assessed on Vero (African green monkey kidney epithelial cells), and HEK-293 (human embryonic kidney) cell lines and both cell lines exhibits high survival rates.</p>

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Trachyspermum Ammi Supported Synthesis of Nano-CeO2 and Its Scope in Photocatalytic Degradation of Ibuprofen in Water

  • 期刊论文

  • 发表日期：

    2025年1月16日

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  • Khushbu Jain,
  • Monika,
  • Kailash Chandra,
  • Gautam Jaiswar,
  • Sambuddha Chakraborty,
  • Ashwini Chauhan,
  • Neeru Dabas

摘要

A sustainable and green synthetic route comprising renewable resources/reagents for the synthesis of metal oxide nanoparticles has a better edge over the conventional chemical synthesis. The present work reports a novel method for the synthesis of CeO2 nanoparticles (NPs) of average size 19.48 nm using an aqueous extract of seeds of Trachyspermum ammi (T. ammi), also known as ajwain or carom seeds, for the first time. T. ammi seed’s extract is rich in bioactive constituents that supports the synthesis of metal oxides nanoparticles. CeO2 synthesized in the current work were characterized by analytical techniques such as Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD), field emission scanning electron microscopy (FE-SEM), Energy dispersive X-ray analysis (EDAX) and Ultra violet-visible diffuse reflectance spectroscopy (UV–Vis DRS). Further, T. ammi derived biogenic CeO2 NPs were used to evaluate their potential application for degradation of Ibuprofen (IBP), a drug that is listed as an essential medicine by WHO, but also detected in water at some regions across the globe and raises concern due to reports of pharmaceutical water pollution. The degradation of IBP was studied by UV–Vis spectrophotometry and mass spectrometry. Furthermore, zeta potential measurements of CeO2 NPs were also carried out to assess the degradation. Key factors affecting the degradation such as drug to catalyst ratio, pH of reaction, role of H2O2 as co- catalyst and exposure of UV light were also investigated and reported. Highest percentage degradation calculated from spectrophotometric data was 61% in our optimized condition. Water quality of synthetic water sample of IBP before and after treatment with photocatalyst was determined by measurement of chemical Oxygen demand (COD) using standard procedure. The percentage COD removal was found 60%. In addition, cytotoxicity studies of CeO2 NPs were also assessed on Vero (African green monkey kidney epithelial cells), and HEK-293 (human embryonic kidney) cell lines and both cell lines exhibits high survival rates.